Answer:
Hydrogen - - helium..
...
According to Newton's Second Law of Motion, if the force acting on ar
object stays the same, but the mass of an object increases, then
acceleration will...
A. increase
B. decrease
C. remain the same
D. completely stop
Answer:
B
Explanation:
Because the mass of an object increases, then the acceleration will decrease
when liquid water changes into solid ice, it increases in ?
when liquid water changes into solid ice, it increases in mass
25.00 grams of sodium chloride reacts with an excess
hydrochloric acid and sodium sulfate. What weight of HCl is produced?
Mass of HCl produced :15.59 g
Further explanationReaction
2NaCl + H₂SO₄ → 2HCl + Na₂SO₄
Excess = H₂SO₄
Limiting = NaCl
mass NaCl = 25 g
mol NaCl(MW=58.5 g/mol) :
[tex]\tt mol=\dfrac{mass}{MW}\\\\mol=\dfrac{25}{58.5}=0.427[/tex]
From the equation, mol ratio NaCl : HCl = 2 : 2, so mol HCl = mol NaCl =0.427
Mass of HCl(MW=36.5 g/mol) :
[tex]\tt mass=mol\times MW\\\\mass=0.427\times 36.5\\\\mass=15.59~g[/tex]
If a sample of ammonia contains 19.0 g of H, how many grams of N does it contain? Express your answer in grams of nitrogen to two significant figures.
Please help me. Thank you
The mass of the nitrogen atoms in ammonia is 6.33 g.
How many moles of nitrogen are present?We know that ammonia is made up of nitrogen and hydrogen and hydrogen. There is one mole of nitrogen and three moles of hydrogen in a mole of ammonia.
Since the ratio of the atoms of hydrogen to nitrogen is 3:1, the ratio of the masses of the atoms is; 1/3 = x/19
x = 6.33 g
The mass of the nitrogen atoms in ammonia is 6.33 g.
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6CO2 + 6H2O —> C6H12O6 + 6O2
If 12 moles of oxygen were produced, how many moles of carbon dioxide were used?
I'll give you guys brainliest just help, please
Answer:
12 number of moles of carbon dioxide are used.
Explanation:
Given data:
Number of moles of oxygen produced = 12 mol
Number of moles of CO₂ used = ?
Solution:
Chemical equation:
6CO₂ + 6H₂O → C₆H₁₂O₆ + 6O₂
Now we will compare the moles of oxygen with carbon dioxide.
O₂ : CO₂
6 : 6
12 : 12
Thus, 12 number of moles of carbon dioxide are used.
All bonds in alkanes, alkenes, and alkynes can freely rotate at room temperature. True or false?.
The statement that all bonds in alkanes, alkenes, and alkynes can freely rotate at room temperature is false.
Alkanes are saturated hydrocarbons with single covalent bonds. All bond in alkanes can freely rotate.
For example, propane is a three carbon alkane (acyclic saturated hydrocarbon).
Chemical formula for the molecule of propane is CH₃-CH₂-CH₃.
Alkenes and alkynes are unsaturated hydrocarbons. Alkenes have one double bond between carbon atoms, while alkynes have one triple bond between carbon atoms. There is no free rotation in double and triple bonds.
R₂C=CR₂ is general formula for the alkenes.
R–C≡C–R is general formula for the alkynes.
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Can someone please please help me with the first two !!!! I really need to turn this in !!!!!
Answer:
Be Electron configuration: 1s2 2s2
Be Orbital Diagram: \//\ \//\ (it would be little arrows going up and down to show the spins)
F Electron Configuration: 1s2 2s2 2p5
F Orbital Diagram: \//\ \//\ \//\ \//\ \/
Sodium and chlorine combine to form sodium chloride, or table salt. Sodium and chlorine are:
A: Producers
B: Products
C: Reactionaries
D: Reactants
A chemical reaction is the combination of two or more elements or compounds to form one or more products. The combining compounds or elements are called reactants. Hence, sodium and chlorine are reactants. Thus option D is correct.
What is a chemical reaction?A chemical reaction is a change in the chemical composition that occurs when two or more species unite to create a new product by forming or breaking chemical bonds.
The reactants are the organisms that are reacting. In a reaction's chemical equation, they are shown on the left side. The right side of the arrow is where the products are shown.
Consider the reaction of sodium and chlorine to give NaCl.
Na + Cl ⇒ NaCl.
NaCl is the product in this reaction. Na and Cl are the reactants. Hence, option D is correct.
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which type of intermolecular force in water creates the surface tension that allows the stones to skip across the top of the water
Answer:
Hydrogen bonding
Explanation:
Water is a compound found readily in nature. It is made up of interatomic forces of covalent bonds that connects the hydrogen and oxygen bonds together in a definite ratio.
The intermolecular forces are responsible for the physical properties of substances. These forces allows a compound to behave in certain ways. In water, the intermolecular bonding present are the very strong hydrogen bonds. For this bond type, the hydrogen of one water molecule is firmly attached to the oxygen of another water molecule. The bonds are very strong forces.......Please help.....
Answer:
A
Explanation:
Elements eventually combine to make compounds, which statement is true
about compounds?
a) The compound formed is different both physically and chemically
compared to the elements that formed it
b) Compounds require lots of energy to be formed and to be separated
c) Compounds are easy to identify by their chemical formula ex. C6H12O6
d) All of the above
The statement that is true about compounds is that
the compound formed is different both physically and chemically compared to the elements that formed it, Compounds require lots of energy to be formed and to be separated and Compounds are easy to identify by their chemical formula. That is option D.
What are chemical compounds?Chemical compounds are chemical substances that are made up of elements which are chemically combined together.
The combination of these elements leads to the formation of new chemical bonds making the newly formed chemical compounds different from the elements that formed it.
During the formation of these chemical compounds, bonds are being broken while other bonds are being formed to make a different chemical compounds.
The energy that is always required to breaks the chemical bond is called the bond energy.
To be able to identify a chemical compound, a chemical formula is being used for example, C6H12O6 is the chemical formula for glucose chemical compound.
Therefore, the statement that is correct concerning a chemical compound include the following:
The compound formed is different both physically and chemically compared to the elements that formed it.Compounds require lots of energy to be formed and to be separated. Compounds are easy to identify by their chemical formula.Learn more about elements here:
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why do chemical equations have to be balanced ?
Answer:
Law of conservation of matter
Explanation:
"matter is neither created nor destroyed."
Answer:
I think that should help....
I have two beakers (A & B) containing clear liquids. The first one (A) holds 75g and after being analyzed proves to contain 4.425g of hydrogen and 70.575g of oxygen. The second beaker (B) holds 125g and analysis shows that it is composed of 7.38g of hydrogen and 117.6g of oxygen.
Answer:
The solutions are most likely hydrogen peroxide since it is the compound of hydrogen and oxygen that has a ratio of Hydrogen to Oxygen ratio of 1 : 1.
Note:The question is not complete.
Explanation:
The empirical formula of the two compounds are determined
Solution in beaker A:
Mass of Hydrogen = 4.425 g
Moles of hydrogen = reacting mass/molar mass = 4.425 g / 1 g/mol = 4.425 moles
Mass of oxygen = 70.575 g
Moles of oxygen = reacting mass/molar mass = 70.575 g / 16 g/mol= 4.411 moles
Mole ratio of Hydrogen to Oxygen = 4.425 : 4.411
Simplest mole ratio = 1 : 1
Therefore, empirical formula of solution in A = H₁O₁
Solution in beaker B:
Mass of Hydrogen = 7.38 g
Moles of hydrogen = reacting mass/molar mass = 7.38 g / 1 g/mol = 7.38 moles
Mass of oxygen = 117.6 g
Moles of oxygen = reacting mass/molar mass = 117.6 g / 16 g/mol= 7.35 moles
Mole ratio of Hydrogen to Oxygen = 7.38 : 7.35
Simplest mole ratio = 1 : 1
Therefore, empirical formula of solution in B = H₁O₁
The solutions in beakers A and B have the same empirical formula. Their molecular masses are not given, so their molecular formula is not certain. However, the solutions are most likely hydrogen peroxide since it is the compound of hydrogen and oxygen that has a ratio of Hydrogen to Oxygen ratio of 1 : 1.
How many moles in 28 grams of CO₂?
Answer:
I think the answer Is 0.636 mol of CO2!
5) In two paragraphs, explain your own personal views on how you and humans as a whole are connected to the environment. Be sure to explain how you think your culture, family, or upbringing has played a part in the development of these views
please help me
The environment is indispensable in the molding of humans from pre historic times.
How are we connected to the environment?The term environment has to do with the surroundings of man. It is the area that surrounds man. Man is shaped by his environment because it has a profound influence on how man reasons and behaves.
In Psychology, the nature - nurture controversy has been a big subject of debate. This theory holds that the environment in which a person was born has a profound influence on the attitudes and perceptions of the individual.
This has held true in so many instances for instance, the faiths that we profess for most of our lives is the result of the religious upbringing that we received in the earlier years of life.
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Using the geologic concept of plate boundaries, compare and contrast the formation of the Andes Mountains,
Himalayan Mountains, the islands of Japan, Iceland, and the San Andreas area of California. Compare ( how are they alike) and Compare (how are they different)
Answer:
Oo Japan. I love japan it’s so pretty and I wish I could go there, it’s my dream place to visit!
Explanation:
What are (at least) six common pollutants that are measured to determine an AQI score?
SOMEONE PLS HELP ME IVE BEEN WAITING FOR 3 DAYS FOR AN ANSWER THIS IS THE ONLY THING HOLDING ME BACK FROM SUBMITTING MY MOM IS GONNA KILL ME PLS THIS IS MY SECOND TIME ASKING PLS HELP ME
If you travel 10 miles in 5 minutes, what is your speed
Answer: 120 mph or 2 mpm
Explanation: 60/5= 12
12*10=120mph
Going 10 miles in 5 minutes means you would be able to go 20 miles in 10 minutes. You would have a total of 12 five minute blocks at 10 miles each. 60 miles in 30 minutes or 120 in 60 minutes.
Or 10 miles in 5 minutes would be 2 miles in 1 minute. (10/5=2)
Sebastian watches his cat run out Into the yard, look at a bug, and then run back to the
house.
Between which two points is the cat's Motion showing No Motion?
The Cat's Position vs. Time
Position
G
Time
A. Points A to B
B. Points B to C
C. Points C to D
D. Points D to E
Answer:
I think its A
Explanation:
How far will a bug crawl if it goes for 20
seconds at 15m/s?
Answer:
300 m
Explanation:
Answer:
300
Explanation:
20x15=300
i know that someone else already got this i just showed the work
HURRY ! Kumar is producing the photoelectric effect by using red light. He wants to increase the energy of emitted electrons. Based on the research of Albert Einstein, what is the best way for him to do this? Increase the intensity of red light. Decrease the intensity of red light. Use a different colored light that has a higher frequency. Use a different colored light that has a lower frequency.
Answer:
using a diffrent colored light with a higher frequency
Explanation:
Iron(III) oxide is formed when iron combines with oxygen in the air.
How many grams of Fe203 are formed when 6.7 g of Fe reacts completely with oxygen?
Fe + 02 --> Fe203 (unbalanced equation)
Answer:
Mass = 9.58 g
Explanation:
Given data:
Mass of Fe₂O₃ formed = ?
Mass of Fe = 6.7 g
Solution:
Chemical equation:
4Fe + 3O₂ → 2Fe₂O₃
Number of moles of Fe:
Number of moles = mass/molar mass
Number of moles = 6.7 g/ 55.8 g/mol
Number of moles = 0.12 mol
now we will compare the moles of Fe and Fe₂O₃.
Fe : Fe₂O₃
4 : 2
0.12 : 2/4×0.12 = 0.06 mol
Mass of Fe₂O₃:
Mass = number of moles × molar mass
Mass = 0.06 mol × 159.69 g/mol
Mass = 9.58 g
An object has a momentum of 5 kg m/s and a mass of 2 kg. How fast is it moving?
Answer:
2.5 meter per second
Explanation:
momentum = mass multiplied by velocity
please mark me brainliest
The element represented by [Xe]6s' is
Answer: is Cesium (Cs)
An oxide of iron is found to be 77. 75% iron by mass. Determine the empirical formula for this compound and name it.
The empirical formula of oxide of iron is Fe2O2 and its name is iron oxide.
Given:
Percentage of iron by mass = 77. 75 %Molar mass of iron = 55.85Percentage of oxygen by mass = 22.25 %Molar mass of oxygen =16Solution:
Now, calculate the relative mass of iron in iron oxide = Percentage of iron by mass / At. mass of iron
Relative mass of iron = 77.75/55.85 = 1.39
Relative mass of oxygen = Percentage of oxygen by mass / At. mass of iron = 22.25/16 = 1.39
Now the calculate the molar ratio of iron to oxygen = 1.39 : 1.39 = 2:2
Thus, the empirical formula of iron oxide is Fe2O2 and its name is iron oxide.
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Question 23 (4 points)
Which of the following is NOT a characteristic for sexual reproduction? (4 points)
оа
Oь
Ос
Od
Uses a sperm and an egg cell
Having non-identical offspring
Having 1 parent
Reproducing slowly
Can someone help me please?
Answer:
D. 10mm = 1 cm
E. 1000m = 1mm
G. 100 cm = 1 m
H. 1 m = 10 dm
. For the reaction 2HNO3 + Mg(OH), → Mg(NO3)2 + 2H20, how many grams of magnesium nitrate are produced from 8.00 mol of nitric acid, HNO,?
Mass of Magnesium nitrate produced : 593.2 g
Further explanationThe reaction equation is the chemical formula of reagents and product substances
A reaction coefficient is a number in the chemical formula of a substance involved in the reaction equation. The reaction coefficient is useful for equalizing reagents and products.
Reaction
2HNO₃ + Mg(OH)₂ → Mg(NO₃)₂ + 2H₂0
mol HNO₃ = 8
From the equation, mol ratio of HNO₃ : Mg(NO₃)₂ = 2 : 1, so mol Mg(NO₃)₂ :
[tex]\tt \dfrac{1}{2}\times 8=4~moles[/tex]
Mass Mg(NO₃)₂(MW=148,3 g/mol) :
[tex]\tt mass=mol\times MW\\\\mass=4\times 148,3 g/mol\\\\mass=593.2~g[/tex]
linalyl acetate (bergamot oil): C , 73.41 % ; H , 10.29 % ; O , 16.30 %
Express your answer as a chemical formula.
Empirical formula tells us the relative ratios of different atoms in a compound.
The chemical formula for a compound obtained by composition analysis is always the empirical formula.
How to calculate Empirical formula:
First, try to write the details, like in a tabular formThen, write the given percentage of the elements under themDivide the given % with the atomic mass of the respective elementsAfter getting the values, divide those values with the least value from among them to get a simplest whole numberLinalyl acetate (bergamot oil):
Carbon Hydrogen Oxygen
73.41 % 10.29 % 16.30 %
73.41 / 12 10.29 / 1 16.30 / 16
6.11 10.29 1.01
6.11 / 1.01 10.29 / 1.01 1.01 / 1.01
6 10 1
Empirical formula : C₆H₁₀O
Thus we can conclude that empirical formula of linalyl acetate is C₆H₁₀O
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The empirical formula for Linalyl acetate expresses the relative proportions of different atoms in a compound.
What exactly is Linalyl acetate?Linalyl acetate is a phytochemical found in a variety of flowers and spice plants. It is an important component of bergamot and lavender essential oils. It is the linalool acetate ester, and the two are frequently found together.
Linalyl acetate, the primary constituent of lavender oil, is a fragrance chemical commonly found in scented products.Linalyl acetate has very low acute toxicity in mammals; the acute oral LD50 exceeds 13,360 mg/kg, and the inhalation LC50 exceeds 2740 mg/m3. Linalyl acetate causes no or very little irritation in humans. There is no information available about possible eye irritation.Linalyl acetate occurs naturally in organisms such as Xylopia aromatic, Citrus tankan, and others for which data is available.Linalyl acetate is safe as a fragrance material at current concentrations.A food additive is used to improve the flavor or odor of food.A substance that kills or slows the growth of microorganisms like bacteria, viruses, fungi, and protozoans.Hence, the empirical formula describes the relative proportions of different atoms in a compound. The chemical formula for a compound obtained through composition analysis is always the empirical formula.
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for a theoretical yield of 22 g and actual yield of 13 g, calculate the percent yield for a chemical reaction
Answer:
59.09%
Explanation:
13/22*100=59.09%