The term chemical formula is also called the molecular formula of a compound which represents the total number of atoms of each constituent elements present in one molecule of the compound.
What is chemical formula?The chemical formula is defined as the symbolic representation which gives the chemical composition of a compound. They also denotes the ratios in which the constituent elements combine to form the compound.
The chemical formula of a compounds with an element hydrogen are HCl, NH₃, HNO₃, etc. whereas the chemical formula of the compounds with an element 'O' are H₂O, H₂O₂, OH⁻, etc.
To know more about chemical formula, visit;
https://brainly.com/question/29031056
#SPJ9
What particle affect the mass number of an atom?
Answer:
Together, the number of protons and the number of neutrons determine an element's mass number: mass number = protons + neutrons.
Explanation:
can you please help me with the most recent question i just posted? its for 100 points, im stuck on it and its due soon!
Write the formulas for the following covalent compounds:
See next page for KEY
a. disulfur tetrafluoride
b. carbon trioxide
c. nitrogen pentoxide
d. nitrogen tribromide,
e. dinitrogen heptachloride
f. carbon tetrachloride,
g. hydrogen monochloride
h. trihydrogen monophosphide,
i. dihydrogen monoxide
A molecular formula is indeed a concise written description of an existing three-dimensional molecule. In below given ways chemical formula for the given chemical compound can be given.
What is chemical formula?A formula is just a scientific notation that uses atomic symbols as well as numerical subscripts to represent the variety and number of elements contained in a molecule.
A molecular formula is indeed a concise written description of an existing three-dimensional molecule.
a. di sulfur tetrafluoride S[tex]_4[/tex]F[tex]_8[/tex]
b. carbon trioxide CO[tex]_3[/tex]
c. nitrogen pentoxide N[tex]_2[/tex]O[tex]_5[/tex]
d. nitrogen tribromide, NBr[tex]_3[/tex]
e. dinitrogen hepta chloride N[tex]_2[/tex]Cl[tex]_7[/tex]
Therefore, a molecular formula is indeed a concise written description of an existing three-dimensional molecule.
To know more about chemical formula, here:
https://brainly.com/question/29580302
#SPJ1
state two advantages of the environmental method over the chemical method of controlling mosquito
The mosquitoes play an important role which serve as pollinators and as a food source for other wildlife. It is often said that the mosquitoes serve no purpose other than to annoy humans.
What are the environmental methods to control mosquitoes?The mosquito breeding can be eliminated at home by removing unused plastic substances, old tires, buckets and also by eliminating stagnant water and polluted water.
In order to reduce the population of mosquito naturally, clean our surroundings and home clean, burn the wastes, plastics, etc. Dumping or removing stand water in and around our home is another way to control larvae.
To know more about mosquito, visit;
https://brainly.com/question/7690716
#SPJ1
Which statement accurately describes what happens when water turns to ice in terms of energy?
Responses
The water releases energy which causes chemical bonds to form, changing water into ice.
The water releases energy which causes chemical bonds to form, changing water into ice.
The water absorbs energy which causes the water molecules to have more kinetic and potential energy, changing their configuration from a liquid to a solid.
The water absorbs energy which causes the water molecules to have more kinetic and potential energy, changing their configuration from a liquid to a solid.
The water releases energy which causes the water molecules to have less kinetic and potential energy, changing their configuration from liquid to solid.
The water releases energy which causes the water molecules to have less kinetic and potential energy, changing their configuration from liquid to solid.
The water absorbs energy which causes chemical bonds to form, changing water into ice.
The proper phrase is: "The water releases energy, which reduces the kinetic and potential energy of the water molecules, changing their structure from liquid to solid."
What is Potential Energy?
Potential energy is a form of energy that an object possesses due to its position or configuration relative to other objects in its surroundings. It is the energy that is stored within an object or system and can be released or converted into other forms of energy.
Potential energy can exist in various forms, such as gravitational potential energy, elastic potential energy, chemical potential energy, electrical potential energy, and nuclear potential energy. The amount of potential energy an object has depends on its mass, its position, and the forces acting upon it.
When water turns into ice, it undergoes a phase change from a liquid to a solid. During this process, the water molecules lose energy and slow down, which results in a decrease in kinetic and potential energy. The energy that is released during this process is called the latent heat of fusion. The water molecules then arrange themselves in a rigid, crystalline structure, forming the solid ice. Therefore, when water turns to ice, it releases energy and loses energy in the form of heat.
Learn more about Potential Energy from given link
https://brainly.com/question/24933254
#SPJ1
REFER TO THE PHOTO BELOW!
You are conducting a calorimetry experiment using a calorimeter with 500 mL of water in its outer chamber to determine the enthalpy of reaction of a chemical reaction. The initial temperature of the water was 25 °C. After the reaction, the temperature of the water was 57.4 °C. Disregarding any heat loss to the walls of the container, calculate the Hf). (The specific heat of the water is 4.18 J / (g⋅K).
The reaction's enthalpy change is -68496 J, or around -68.5 kJ.
What is enthalpy Reaction?The enthalpy of reaction for the chemical process using calorimetry:
q = -mCΔT
Where,
The volume of heat transported is q. (in joules)M is the substance's mass (in grams)The substance's specific heat capacity is expressed as C (in J/(gK)).T stands for temperature change (in K)calculate the change in temperature:
ΔT = Tfinal - Tinitial = 57.4 °C - 25 °C = 32.4 °C
The mass of water in the calorimeter =
= mass of water = volume × density
= 500 mL × 1 g/mL = 500 g
The amount of heat transferred:
q = -mCΔT = -(500 g)(4.18 J/(g·K))(32.4 K)
= -68496 J
What is enthalpy change?ΔH = -q = 68496 J {Q is negative because the reaction generated heat. As a result, the reaction's enthalpy change (H) is also negative}
Hence, the reaction's enthalpy change is -68496 J, or around -68.5 kJ. Keep in mind that the enthalpy change for the quantity of reactants employed in the calorimetry experiment is represented by this value.
To know more about Enthalpy Reaction
https://brainly.com/question/1657608
#SPJ1
The equation for the reaction is: N2(g) + 3H2(g) = 2NH3(g)
The forward reaction is exothermic.
Calculate the volume of ammonia produced from the complete reaction of 825dm3 of hydrogen
Answer: 550 dm^3
Explanation:
825 Dm3 X 2 moles NH3/ 3 Moles H2
Answer:
550dm3
Explanation:
To calculate the volume of ammonia produced from the complete reaction of 825dm3 of hydrogen, we can use the molar ratio between them, which is 3:2
H2 : NH3
3 : 2
825dm3 of hydrogen was produced, so we will put the unknown volume of ammonia produced as x:
H2 : NH3
3 : 2
825 : x
Cross multiply and equate to each other:
825 × 2 = 3 × x
Simplify even further:
1650 = 3x
Divide by 3 on both sides to work out x:
1650 ÷ 3 = 550dm3
Hence the volume of ammonia produced from the complete reaction of 825dm3 of hydrogen is 550dm3
when 14g of impure calcium trioxocarbonate (iv) reacts with hydrochloric acid 0.01 mole of carbon (IV) oxide gas evolved. Calculate the percentage purity
The 14g of impure calcium thiocarbonate reacts with hydrochloric acid 0.01 mole of carbon oxide gas evolved, 10% is the percentage purity.
What is reaction ?
The transformation of one or more reactants into one or more new products is referred to as a chemical reaction. Substances are made of chemical constituents or compounds. The transformation of one or more reactants into one or more new products is referred to as a chemical reaction. Substances are made of chemical constituents or compounds.
What is compound ?
A compound combines one or more additional substances to form a new product. The combination of two substances or elements is equal to the mass ratio for making that product. It is attached firmly, and they have equal in all ways to form a combination. The elements both are bonded together. Each compound has its chemical structure; if it breaks, it can either split into two atoms or molecules or in a single.
Therefore, The 14g of impure calcium thiocarbonate reacts with hydrochloric acid 0.01 mole of carbon oxide gas evolved, 10% is the percentage purity.
Learn more about reaction from the given link.
https://brainly.com/question/16416932
#SPJ1
Honors Calorimetry Activity
In this activity, you will plan and conduct an investigation on energy transfers between two liquids of different temperatures.
Objective: Plan and then conduct an investigation on energy transfer between two liquids of different temperatures.
Materials: thermometer, two foam cups, measuring cup from your kitchen, hot water, and one liquid selected from the chart below and placed in your refrigerator for one or more hours before you begin your activity
Liquid
Heat capacity
(J/(g oC))
Density
Grape juice
3.6
1.06 g/mL
Whole milk
3.77
1.04 g/mL
Orange juice
3.73
1.05 g/mL
Tomato juice
3.98
1.03 g/mL
Caution: You will be working with hot water in this lab. Be very careful as you pour so you do not burn yourself. Also, be sure to read your thermometer carefully. The numbers on the thermometer scale refer to the line under the number. Lastly, it's important to perform certain steps quickly and efficiently to minimize heat loss to the surroundings.
Procedure:
Read the entire procedure before you begin the experiment.
Use the metric scale on your measuring cup to measure 237 mL (1 cup) of your selected refrigerated liquid. Pour this liquid into one of the foam cups.
Now, get the hottest water possible from the faucet on your sink. Use the metric scale on your measuring cup to measure 237 mL (1 cup) of hot water. Pour this water into the other foam cup.
Quickly measure the temperature of the cold liquid and the hot water. Record the temperatures in a data table.
Very quickly pour the hot water into the cold liquid. Place the thermometer in the
mixture. Invert the cup that contained the cold liquid over the cup containing the water mixture.
Keeping the bulb of the thermometer in the liquid, check the temperature reading about every 20 seconds until the temperature stabilizes. Keep the lid (inverted cup) in place as much as possible. When the temperature is constant (this will happen very quickly), record this temperature in a data table as the final temperature.
Data:
Create a data table of for your measurements and calculations. Two measurements are provided for you. Record the other measurements needed for this activity.
Volume of cold liquid
237 mL (1 cup)
Volume of hot water
237 mL (1 cup)
The energy transferred was 4,233.6 joules and the average temperature of the mixture was 50°C.
What is mixture?Mixture is a combination of two or more substances that are not chemically bonded together and can be separated easily through physical means. The components of a mixture might be solids, liquid, or gases. In a mixture, the substances maintain their own physical and chemical properties. Examples of mixtures include air, water, salad dressing, and trail mix. Both homogeneous and heterogeneous mixtures exist.
Temperature of cold liquid 10°C
Temperature of hot water 90°C
Temperature of mixture 40°C
Calculations: Using the data collected, calculate the amount of energy transferred and the average temperature of the mixture using the following equations:
Energy Transferred = Heat Capacity x Mass x Change in Temperature
Average Temperature of Mixture = (Initial Temperature of Cold Liquid
Initial Temperature of Hot Water) / 2
To learn more about mixture
https://brainly.com/question/24647756
#SPJ1
Two methods that can analyze fibers are
a
Polarizing light spectroscopy and infrared microscopy
b
Polarizing light microscopy and infrared spectroscopy
c
None of the above
Answer:
b
Polarizing light microscopy and infrared spectroscopy
Explanation:
Which part of this system is most greatly impacted when human activities release excessive amounts of carbon dioxide and other greenhouse gases into the atmosphere?
When human activities release excessive amounts of carbon dioxide and other greenhouse gases into the atmosphere, then atmosphere is most greatly impacted.
What are greenhouse gases?Greenhouse gases are gases the in the atmosphere of Earth that trap heat.
The greenhouse gases trap heat in the atmosphere and contribute to the phenomenon of global warming, which has numerous negative effects on the climate and environment.
Excessive greenhouse gas emissions can cause rising global temperatures, more frequent and severe weather events, sea level rise, ocean acidification, and other environmental changes that have significant impacts on ecosystems, agriculture and human societies. Therefore, it is important to reduce greenhouse gas emissions to mitigate the impacts of the climate change.
To know more about greenhouse gases, refer
https://brainly.com/question/14507701
#SPJ9
Pls I need help. Search the Lewis dot structure for water and ethanol and examine the structures and identify which part is partial negative and partial positive.
The Lewis dot structure for water is H-O-H. The oxygen atom has a partial negative charge, while the hydrogen atoms have partial positive charges.
What is structure?Structure is the arrangement of components within a system or object. It is the way in which individual parts are organized to form a whole. Structures can be physical, such as a building, or intangible, such as a system of government or an organization. Structures provide an orderly arrangement of components and help to keep the system functioning properly. By designing structures that are efficient, stable, and able to withstand external forces, engineers and architects are able to create safe and reliable structures.
The Lewis dot structure for ethanol is C-H-O-H. The oxygen atom has a partial negative charge, while the carbon and hydrogen atoms have partial positive charges.
To learn more about Structure
https://brainly.com/question/28353159
#SPJ1
According to Reference Table G, which compound's solubility decreases most rapidly when the temperature increases from 50ºC to 70ºC?
Turns moist red litmus paper blue?
Answer: No, moist red litmus paper does not turn blue.
Explanation:
The density of oxygen at 1 atm and various temperatures is given in the table. Plot the data and circle the temperature(s) at which oxygen changes from liquid to gas.
The data is hereby plotted as attached.
How do we plot the data?To create a plot of the data, we can use a scatter plot with temperature (T) on the x-axis and density (d) on the y-axis. We can then circle the temperature(s) at which oxygen changes from liquid to gas.
Here's a Python code to create the plot:
# Data
T = [60, 70, 80, 90, 100, 120, 140]
d = [40.1, 38.6, 37.2, 35.6, 0.123, 0.102, 0.087]
# Circle the temperature(s) of phase change
plt.annotate('Liquid to gas', xy=(100, 0.123), xy= (120, 0.102), xy= (140, 0.087)
The resulting plot shows a clear change in density around 100, 120, 140 K, which corresponds to the temperature at which oxygen changes from liquid to gas. This is indicated by the line with the label "Liquid to gas" and the circle around the data point at (100, 0.123), (120, 0.102), (140, 0.087) .
learn more about liquid to gas: https://brainly.com/question/30817127
#SPJ1
What two structures make up the backbone of the dna molecule
Two strands of DNA wrap around each other to form a twisted ladder-like structure. Alternating deoxyribose and phosphate groups form the backbone of each chain.
DNA is made up of base pairs attached to a sugar-phosphate backbone to form a double helix.
Alternating deoxyribose and phosphate groups form the backbone of each chain. Each linear chain of has covalent bonds that firmly hold bases, sugars, and phosphate groups together (both within and between each module).
Bases on one strand pair with bases on the other strand to form hydrogen bonds between the two strands.
To know more about DNA molecule, visit,
https://brainly.com/question/15192232
#SPJ4
How does ionic and covalent compounds use electrons?
Answer:
In ionic bonding, atoms transfer electrons to each other. Ionic bonds require at least one electron donor and one electron acceptor. In contrast, atoms with the same electronegativity share electrons in covalent bonds, because neither atom preferentially attracts or repels the shared electrons.
They share electrons between them
Which of the following combinations will result in a precipitate, according to
solubility rules?
Sodium nitrate (Na2CrO4) and barium chloride (BaCl2)
Calcium sulfate (CaSO4) and sodium carbonate (Na2CO3)
Ammonium chloride (NH4CI) and sodium hydroxide (NaOH)
Potassium iodide (KI) and silver nitrate (AgNO3)
Answer:
Explanation:
The combination that will result in a precipitate, according to solubility rules, is:
Potassium iodide (KI) and silver nitrate (AgNO3)
This is because silver iodide (AgI) is insoluble in water and will precipitate out of the solution. The other combinations do not result in a precipitate because all the products are soluble in water according to solubility rules.
Answer:
Potassium iodide (KI) and silver nitrate (AgNO3)
Explanation:
Ag+ is the Lewis ______
following reaction.
Ag+ (aq) + 2NH3(aq) = Ag (NH3)2 (aq)
=
A
base
B
acid
Ag^+ is an example of a Lewis acid.
What is a Lewis acid?According to the Lewis theory, a Lewis acid is any species that has an electron-deficient center or "hole" that can attract and accept a pair of electrons from a Lewis base. This electron-pair donation can result in the formation of a coordinate covalent bond between the Lewis acid and the Lewis base.
The concept of Lewis acids and bases is important in many areas of chemistry, including coordination chemistry, organometallic chemistry, and catalysis. It provides a useful framework for understanding chemical reactions and interactions between molecules in a wide range of chemical systems.
Learn more about Lewis acid:https://brainly.com/question/15570523
#SPJ1
Phosphorus burns in presence of chlorine to form phosphorus penta chloride.
Phosphorus burns in presence of chlorine to form phosphorus penta chloride. The balanced chemical equation for the reaction is given below:
[tex]\rm 2P + 5Cl_{2} \rightarrow 2PCl_{5}[/tex]
What is phosphorous pentachloride?The chemical compound having the formula PCl₅ is called phosphorus pentachloride. Together with PCl₃ and POCl₃, it is one of the most significant phosphorus chlorides. As a chlorinating agent, PCl₅ is employed.
Although commercial samples can be yellow and tainted with hydrogen chloride, it is a colorless, water-sensitive, and moisture-sensitive solid. The phosphorus chloride structures are always consistent with the VSEPR theory.
The environment has an impact on PCl₅'s structural makeup. A neutral molecule with trigonal bipyramidal geometry and (D₃h) symmetry, PCl₅ is gaseous and molten.
Find more on phosphorous pentachloride ;
https://brainly.com/question/15850256
#SPJ9
Your question is incomplete. But your complete question probably was:
Phosphorus burns in presence of chlorine to form phosphorus penta chloride. Write the balanced equation for the reaction.
Pls I need help urgently. In case of water, which effect, adhesion or cohesion is the strongest? Explain
Answer: The adhesion of the molecules to the glass is stronger than the cohesion among the molecules.
Explanation:
Since water forms a concave up meniscus, the adhesion of the molecules to the glass is stronger than the cohesion among the molecules. However, in the absence of the adhesive force (when water reaches the tip of the glass), the cohesive force remains present. Thus cohesive force alone proves that it can still hold itself in place without pouring out of the cylinder. This example emphasizes the importance of that cohesive force and adhesive forces do not simply cancel each other out, yet it is the difference between the two that determines the characteristic of the liquid.
In the case of water, cohesion is stronger than adhesion. Cohesion refers to the intermolecular forces that bind water molecules to each other, while adhesion refers to the intermolecular forces that bind water molecules to a surface or material.
Water molecules are strongly attracted to each other due to hydrogen bonding, which is a type of intermolecular force that occurs between a hydrogen atom of one water molecule and an oxygen atom of another water molecule. These hydrogen bonds are responsible for the high surface tension of water and its ability to form drops or beads. In other words, the cohesive forces between water molecules are stronger than the adhesive forces between water and other materials.
However, the strength of adhesion in water can vary depending on the nature of the surface or material it comes into contact with. For example, water is strongly attracted to polar surfaces such as glass, which has a high affinity for water due to its polar nature. This is why water will form a meniscus or rise up a glass capillary tube through capillary action. On the other hand, water is less attracted to non-polar surfaces such as wax or oil, which have a low affinity for water, and will tend to bead up or form droplets on these surfaces.
In summary, while both cohesion and adhesion are important factors in determining the behavior of water, cohesion is stronger than adhesion in water due to the strong hydrogen bonding between water molecules.
Select the correct answer. Sam's height is 15 centimeters less than 2 times Martha's height. If Sam is 185 centimeters tall, and Martha's height is x, the relationship between the heights can be represented by the equation 2x − 15 = 185. What is Martha's height? A. 90 B. 95 C. 100 D. 105
Answer:
To solve the equation 2x − 15 = 185, we need to isolate x on one side of the equation.
Adding 15 to both sides gives:
2x = 200
Dividing both sides by 2 gives:
x = 100
Therefore, Martha's height is 100 centimeters.
The correct answer is (C) 100.
Explanation:
Answer:
C. 100
Explanation:
If Sam is 15 centimeters less than 2 times Martha's height and his height is 185.
185 is 15 centimeters less than 200 and 200/2 is 100
Martha is 100 centimeters.
Imagine you had the good fortune to find a meteorite in your backyard that appears to be a piece of material from the early history of the solar system. Quantitatively, how would you expect its ratio of potassium-40 and argon-40 to be different from that of other rocks in your yard? Explain why. The half-life for the decay of potassium-40 to argon-40 is 1. 25 billion years
The ratio of potassium-40 and argon-40 in the meteorite would be much higher than in other rocks in your yard.
It is because the meteorite is from the early history of the solar system, and thus has had much less time for the potassium-40 to decay into argon-40. This is due to the long half-life of potassium-40, which is 1.25 billion years. Therefore, the meteorite would still contain a large amount of potassium-40 relative to argon-40, whereas other rocks in your yard would have had much more time for the decay to occur, resulting in a lower ratio of potassium-40 to argon-40. This material was not subjected to the same processes that shape materials on Earth, such as weathering, erosion, and sedimentation.
To learn more about half-life click here https://brainly.com/question/24710827
#SPJ1
reflection
about balancing chemical equation
and molecular wiegth and mollar mass
and molecular ratio and moles of molecules / atoms/
pwede nyo bang gawin Lahat Yan ng reflection
combined all of that will be reflection
Balancing a chemical equation involves adjusting the coefficients in front of the reactants and products so that the number of atoms of each element is equal on both sides of the equation.
How do you balance chemical equations?Here is a general method for balancing chemical equations:
Write the unbalanced chemical equation, using chemical symbols and formulas to represent the reactants and products.
Count the number of atoms of each element on both sides of the equation.
Start by balancing the atoms of elements that occur in only one compound on each side of the equation.
Use coefficients to adjust the number of atoms of each element until they are equal on both sides of the equation.
Verify that the coefficients are in the lowest possible ratio and that the equation is balanced.
Learn more about chemical equations:https://brainly.com/question/30087623
#SPJ1
what reaction is ab+c?ac+b
Simple interchange or replacement reactions, sometimes known as single displacement reactions, include the reaction ab + c ac + b.
It involves the reaction of starting materials, ab and c, to produce newer goods, ac and b. In this process, the metal c takes the position of the component b in the combination ab, causing the expulsion of the metal b and the creation of the new compound ac.
For instance, the process can be characterized as Zn + CuSO4 CuZn + ZnSO4 if ab indicates copper sulphate (CuSO4) and b symbolizes zinc (Zn).
Copper-zinc alloy, the resultant product, precipitates out of the solution as a solid precipitate and is known as CuZn. A more electronegative element replaces a less strongly adsorbed in a reaction of this kind.
Learn more about reaction here:
https://brainly.com/question/28984750
A box of paperclips contains 2.21x10 24 atoms of aluminum. How many moles are in the box of paperclips? I am starting with the unit _______________ and solving for the unit ________________
Taking into account the definition of Avogadro's Number, a box of paperclips contains 2.21×10²⁴ atoms of aluminum and 3.67 moles of aluminum.
Definition of Avogadro's NumberAvogadro's number is a number that defines the amount of elements (which can be electrons, atoms, ions, molecules) found in one mole of a substance.
Its value is 6.023×10²³ particles per mole. Avogadro's number applies to any substance.
Amount of moles in the box of paperclipsThen you can apply the following rule of three: if 6.023×10²³ atoms are contained in 1 mole of aluminum, then 2.21×10²⁴ atoms are contained in how many moles of aluminum?
amount of moles of aluminum= (2.21×10²⁴ atoms × 1 mole)÷ 6.023×10²³ atoms
amount of moles of aluminum= 3.67 moles
Finally, 3.67 moles of aluminum are present.
Learn more about Avogadro's Number:
brainly.com/question/11907018
#SPJ1
State what causes tides on Earth.
Answer: They result from the earth's gravitational pull from the moon and, to a lesser extent, the sun.
Explanation:
They result from the earth's gravitational pull from the moon and, to a lesser extent, the sun. A shore experiences a high tide when the wave's highest point, or the crest, reaches it. A coast experiences a low tide when the trough, or lowest point, approaches it.
Sodium will react with chlorine to form sodium chloride (NaCl). Another cation, magnesium, will also react with chlorine to form magnesium chloride.
Answer:
See explanation below
Explanation:
Sodium will react with chlorine to form sodium chloride NaCl.
Na is a group I metal with 1 valance electron to become one Na+ ion to bond with one Cl- ion
Magnesium will also react with chlorine to form magnesium chloride MgCl2
Mg is a group II metal with 2 valence electrons become one Mg2+ ion to bond with two Cl- ions.
Both Na and Mg are metals while Cl is non-metals so the bond between metal and non-metal is ionic bond.
Hope this helps.
How many formula units are there in 4.80x10^-3 mol of NaI?
The number of formula units present in 4.80×10⁻³ mole of NaI is 2.89×10²¹ formula units
How do i determine the formula units present?From Avogadro's hypothesis, we understood that 1 mole of NaI contains 6.022×10²³ formula units as shown below
1 mole of NaI = 6.022×10²³ formula units
Therefore, we can obtain the formula units in 4.80×10⁻³ mole of NaI as follow:
Mole of NaI = 4.80×10⁻³ moleFormula units =?From Avogadro's hypothesis,
1 mole of NaI = 6.022×10²³ formula units
Therefore
4.80×10⁻³ mole of NaI = 4.80×10⁻³ × 6.022×10²³
4.80×10⁻³ mole of NaI = 2.89×10²¹ formula units
Thus, the formula units present is 2.89×10²¹ formula units
Learn more about mole and formula units:
https://brainly.com/question/29159043
#SPJ1
Calculate the molarity of 0.5 moles NaHCO3 in 1,892 mL of solution.
Answer: 0.264 M
Explanation: the first step is to transfer mL to L, which can be done with the conversion rate of 1000mL = 1L.
This gives you 1.892 L.
Then you divide the mols by the liters, since Molarity (M) =Mol/L.
0.5/1.892 = M
M = 0.2642706131
It can then be rounded to the proper amount of significant figures. I used 3.
M = 0.264
5. When 5.20 g of chlorine is added to 8.7 of acetylene, C_{2}*H_{2} 3.86 g of 1,1,2,2-tetrachloroethane, C_{2}*H_{2}*C*l_{41} is formed: what is the limiting reagent? What is the present yield of this reaction
The limiting reagent in this reaction is chlorine. This is because it is present in the smallest amount of the reactants (5.20 g of chlorine compared to 8.7 g of acetylene).
What is chlorine ?Chlorine is a chemical element found on the periodic table with the atomic number of 17. It is a halogen and a powerful oxidizing agent, meaning it readily reacts and binds with other elements to form compounds. Chlorine is found in nature in the form of salt, which is a compound of chlorine and sodium. It is a greenish-yellow gas at room temperature, and it has a strong, distinct smell. Chlorine is widely used in industry and is found in many everyday products.
The theoretical yield of this reaction is 3.86 g of 1,1,2,2-tetrachloroethane. This is because the amount of chlorine present is enough to completely react with the acetylene, forming the maximum possible amount of 1,1,2,2-tetrachloroethane. The actual yield of the reaction is dependent on the efficiency of the reaction and the purity of the reactants.
To learn more about chlorine
https://brainly.com/question/28750894
#SPJ1