Answer:
17g
Explanation:
Using the relation :
Volume = mass / molar mass
Volume of ammonia = 22.4 litres
Mole of gas at stp :
1 M of NH3 = 22.4 litres
Chemical formula for ammonia = NH3
The molar mass :
NH3 =14 + (1*3) = 14 + 3 = 17
Volume of ammonia = 1 M
Mass = volume * molar mass
Mass = 1 * 17
Mass = 17g
How can controlling the way light bends and reflects be used to help people?
Answer:
The reflection of light serves to indirectly illuminate some things or objects and thus better visualize it from different human perspectives or different human views
Explanation:
Indirect visions through light reflections are widely used in detailed work or in areas where the field of work is small, an example of this is the dental area, where a mirror number 15 is used to be able to make the visual inspection of the mouth. , in the upper jaw by means of light reflection.
Fill in the blanks to describe the work of Ben Kennedy, a volcanologist who works in New Zealand. To learn more about why his pumice sample was shrinking, Ben Kennedy studied . This material is similar to pumice because both are full of air . Kennedy found that the shrinking had to do with molten rock’s surface , which is the force that holds a droplet of water together.
Answer:
1)- foam
2)- bubbles
3)- tension
Explanation:
Answer:
1. Foam
2. Bubbles
3. Tension
Explanation:
Right on Edge
What is the molarity of a magnesium chloride solution with 90.5 g of MgCl2 dissolved in a solution with a total volume of 2300 mL?
Answer:
Molarity = 0.41 M
Explanation:
Given data:
Mass of MgCl₂ = 90.5 g
Volume of solution = 2300 mL (2300/1000 = 2.3 L)
Molarity of solution = ?
Solution:
Number of moles of MgCl₂:
Number of moles = mass/molar mass
Number of moles = 90.5 g/ 95.2 g/mol
Number of moles = 0.95 mol
Molarity:
Molarity = number of moles / volume in L
Molarity = 0.95 mol / 2.3 L
Molarity = 0.41 M
please help me please please
Answer:
d
D
C
D
c
Explanation:
5 points
What do you think photosynthesis means ?
Explanation:
In short answer- Photosynthesis is the process in which plants and geen gigmant makes their own food.
Choose the COEFFICIENTS that balance the equation by the inspection method.
Answer:
somebody please help her or him please please
Help ASAP give brainest if right And please hurry
Answer:
Conduction
Convention
Radiation
in that order
Answer:
Conduction
Convention
Radiation
Explanation:
30. A solid sample contains only CaCO3, and MgCO3.
To completely react the CaCO3 and MgCO3
present in the sample. 42.00 cm of 0.088 M
HCI were required. The anhydrous chloride salts
from the reaction, obtained by evaporation of
the filtrate weighed 0.19 g. The mass of CaCO3
present in the solid sample is (C = 12,0 = 16,
Mg = 24, Ca = 40, CI = 35.5 )
(1) 0.05 g.
(2) 0.07 g
(3) 0.09 g
(4) 0.11g
(5) 0.12 g
Answer:
Explanation:
Step 1
The mass percent of MgCO3 in the original mixture is calculated as shown,
Step 2
Masses of MgCO3 and CaCO3 is 24g; Moles of carbon dioxide produced from Magnesium carbonate and Calcium carbonate are.
Step 3
Adding and equating the moles of Carbon dioxide results in,
Step 4
Percent mass of MgCO3 in the sample is calculated as,
What type of atoms form ionic bonds
Answer:
onic bonds usually occur between metal and nonmetal ions. For example, sodium (Na), a metal, and chloride (Cl), a nonmetal, form an ionic bond to make NaCl. In a covalent bond, the atoms bond by sharing electrons. Covalent bonds usually occur between nonmetals.
Explanation:
In the give question, ionic bonds are formed between metals and nonmetals.
An ionic bond is a type of chemical bond that involves the transfer of electrons from one atom to another.
Metals tend to lose electrons easily, while nonmetals tend to gain electrons easily. So, ionic bonds are typically formed between metals and nonmetals.
For example: Table salt (NaCl)
It is formed when sodium (Na), a metal, loses an electron to chlorine (Cl), a nonmetal, which gains that electron. The resulting ions,[tex]\rm Na^+\ and \ Cl^-[/tex], are then attracted to each other, forming an ionic bond.
Therefore, metals and nonmetals combine together to form ionic bonds.
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12 gram of magnesium carbonate is heated till no for the loss of heat the final mass was found to be 5.28 gram how much CO2 gas was given out
Answer:
12 g
Explanation:
Chemical equation:
MgCO₃ → MgO + CO₂
12g = 5.28g + 6.72 g
12 g = 12 g
According to the law of conservation mass, mass can neither be created nor destroyed in a chemical equation.
This law was given by French chemist Antoine Lavoisier in 1789. According to this law mass of reactant and mass of product must be equal, because masses are not created or destroyed in a chemical reaction.
MgCO₃ → MgO + CO₂
There are 12 g of magnesium carbonate on the left side, according to the law of conservation of mass on the right side there should be 12 g product. Thus, 6.72 g of CO₂ should be formed.
Given the following information:
Heat of sublimation of Li(s) = 166 kJ/mol
Bond energy of HCl = 427 kJ/mol
Ionization energy of Li(g) = 520. kJ/mol
Electron affinity of Cl(g) = -2349 kJ/mol
Lattice energy of LiCl(s) = -2829 kJ/mol
Bond energy of H₂ = -432 kJ/mol
Calculate the net change in energy for the following reaction:
2Li(s) + 2HCl(g) --> 2LiCl(s) + H₂(g)
Answer:
Ya'll should really practice more because things like these are easy
Explanation:
You guys need to practice more since stuff like this are pretty simple.
What is net change?According to the net change theorem, the ultimate value of a quantity equals the beginning value plus the integral of the rate of change when a quantity changes. The net change can be positive, negative, or zero.The term "Net Change in Cash" indicates how much Cash and Cash Equivalents changed in value during the reporting period. It is the main punchline of the Cash Flow Statement. Net Cash Change quantifies how much the value of Cash and Cash Equivalents changed during the reporting period. The main punchline on the Cash Flow Statement is this. When using net cash as a barometer to determine a company's financial health, it is critical to analyse what activities contribute to positive or negative net cash.To learn more about net change refer to:
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What can you conclude about x-rays compared to microwaves? (2 points) X-rays have the same frequency as microwaves. X-rays have a lower frequency than microwaves. X-rays have a longer wavelength than microwaves. X-rays have a shorter wavelength than microwaves.
Answer:
X-rays have a shorter wavelength than microwaves.
Some horses are bred for speed while other horses are bred for pulling heavy loads. What is the main influence on weather a horse will become a racehorse or farm horse?
Answer:
Good environmental and weather conditions.
Explanation:
The main influence for a horse that will become a racehorse or farm horse are good environmental and weather conditions. It also needs good food and proper training to made a racehorse. High quality race of a horse always prefer for making a racehorse because it has higher agility, speed, and spirit as compared to horse belongs to ordinary race.
How many moles are in 5.32 x 1020 atoms
of copper?
What is the answer but in numbers ?
Answer is 1.41 x 10 with the exponent of 24, atoms
Explanation : Look at the picture i attached.
will mark a brainliest.
Which of the following is correct chemical formula for "di-carbon tetra-oxide?"
C204
C404
C05
C2 08
Answer:
The answer is actually CO4
Explanation:
prove me wrong
Answer:
C2O4
Explanation:
Di means 2 and tetra means 4
For each claim below, select whether you think this claim is supported by evidence or not. Elisa is feeling tired because she has diabetes. Elisa is feeling tired because she has anemia. Elisa is feeling tired because she has an injury to her pancreas. Elisa is feeling tired because she has asthma.
Answer and Explanation:
Elisa is feeling tired because she has diabetes - suported: diabetes, in fact, can trigger episodes of extreme tiredness in patients, this tiredness may have been accompanied by dizziness and being.
Elisa is feeling tired because she has anemia. - Supported: Anemia hampers the transmission of oxygen in the blood, which can cause tiredness, weakness and extreme fatigue.
Elisa is feeling tired because she has an injury to her pancreas - suported: The pancreas is responsible for the production of insulin which is essential to prevent diabetes from establishing itself in the body. If the pancreas is damaged, insulin may be insufficiently produced, increasing the chance of developing diabetes and causing tiredness.
Elisa is feeling tired because she has asthma - suported: asthma causes breathing difficulties, this can cause tiredness and fatigue.
Question 10 of 10 Which statement accurately describes malleability? A. A material slows or completely blocks the flow of electrons through it. B. A liquid with larger molecules resists movement more than a liquid with smaller molecules does. C. Attractive forces between molecules at the surface cause a liquid to resist spreading out. D. A material with relatively weak bonds between its particles can be shaped into a thin sheet. SUBMIT
Malleability is the physical property of the metal by which it can alter its shape. It is due to relatively weaker bonds between the particles. Hence, Option (D) is correct.
What is malleability?The ability of a material to form thin sheets under pressure by hammering or rolling is called malleability. The hammers and machines are used as an external force to alter the shape and structure. Aluminum, copper, gold, iron, etc are malleable metals.
Malleability is the property of metals due to their ability to change their shape beyond their limit of compression. These substances can be rolled or even can be made as sheets and are used in making tools and machines.
Therefore, option D. malleability is due to weaker bonds between its matter particles.
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Hey!!!! Hru? 13(4)+8(78)=x
Answer:
x=676
Explanation:
Answer:
x = 676
Explanation:
13*4 = 52
8*78 = 624
624 + 52 = 676
Balance these equations!
1)
AIBr; +
K-
KBr +
AI
Answer:
Instructions on balancing chemical equations:
Enter an equation of a chemical reaction and click 'Balance'. The answer will appear below
Always use the upper case for the first character in the element name and the lower case for the second character. Examples: Fe, Au, Co, Br, C, O, N, F. Compare: Co - cobalt and CO - carbon monoxide
To enter an electron into a chemical equation use {-} or e
To enter an ion specify charge after the compound in curly brackets: {+3} or {3+} or {3}.
Example: Fe{3+} + I{-} = Fe{2+} + I2
Substitute immutable groups in chemical compounds to avoid ambiguity.
For instance equation C6H5C2H5 + O2 = C6H5OH + CO2 + H2O will not be balanced,
but PhC2H5 + O2 = PhOH + CO2 + H2O will
Compound states [like (s) (aq) or (g)] are not required.
If you do not know what products are enter reagents only and click 'Balance'. In many cases a complete equation will be suggested.
Reaction stoichiometry could be computed for a balanced equation. Enter either the number of moles or weight for one of the compounds to compute the rest.
Limiting reagent can be computed for a balanced equation by entering the number of moles or weight for all reage
Explanation:
What are some examples of HIGH resistance?
Options:
narrow wire, less resistors, long wire
long wire, wide wire, more resistors
long wire, narrow wire, more resistors
wide wire, short wire, less resistors
Answer:
Its long wire narrow wire more resistance
Explanation:
I took the same k12 test
Answer: it’s long wire narrow wire more resistors
Explanation: I took the same k12 test
good Luck cheating I mean using your resources
What is different about the atomic structure of the oxygen isotopes?
Answer:
Each isotope of oxygen contains 8 protons, but differs in the number of neutrons. An isotope number is a shorthand representation of its mass. Because protons and neutrons are roughly equal in mass, an isotope's number is equal to the sum of its protons and neutrons.
Explanation:
Isotopes are atoms of the same element that have different numbers of neutrons but the same number of protons and electrons. The difference in the number of neutrons between the various isotopes of an element means that the various isotopes have different masses.
SHOW WORK
A dog weighs 15 lbs, what is that weight in oz?
Answer:
240 oz
Explanation:
1 ibs= 16 Oz
15 ibs= 15 × 16 = 240 oz
A plant that has both male and female reproductive structures is able to.
A plant that has both male and female reproductive structures can self pollinate.
What is pollination?Pollination is the process in which pollen grains are being transferred from the male anther of a flower to the stigma of a female flower. Two forms of pollination include:-
Cross-pollination:- Pollen grains are transmitted from the stamen of one flower to the stigma of a flower on another plant of the same species in cross-pollination.
Self-pollination:- The process of transferring the pollen grains from the anther to the stigma of the same flower or the stigma of a flower on the same plant is called self-pollination.
Pollination by insects is called entomophily and pollination by birds is called ornithophily. Pollination by vertebrates is known as zoophily. Abiotic agents – Wind and water. Wind pollination is known as anemophily and pollination by water is called hydrophily.
Therefore, A plant that has both male and female reproductive structures can self pollinate.
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Convert to standard notation.
3.94 x 10^7
Answer:
Standard Notation:39,400,000
Explanation:
3.94*10^7= 39,400,000
the answer is 39400000x
Which of the following is a challenge to democracy shared by both Brazil and Mexico?
A.
People have no economic freedoms.
B.
People accused of a crime have few protections.
C.
Most people do not have the right to vote.
D.
Crime and corruption are serious problems in government.
I’m givin brainliest out also gimme reason
What is the difference between electrical and light energy??
Answer:
Light energy is a form of electromagnetic radiation. Light consists of photons, which are produced when an object's atoms heat up. Light travels in waves and is the only form of energy visible to the human eye.
Electrical energy is a form of energy resulting from the flow of electric charge. Energy is the ability to do work or apply force to move an object. ... The movement of charged particles through a wire or other medium is called current or electricity.
Which of the following best describes how forces affect matter?
A. Forces create matter
B. Forces hold matter together.
C. Forces conserve matter.
D. Forces keep matter warm
it is b forces hold matter together
A force is a push or pull on an object. Forces usually cannot be seen but their effects can. Nothing moves, changes speed, stops or changes direction without force. Heavier objects need more force to get them to move or change direction.
Answer:
Yup, it's B. Forces hold matter together.
Explanation:
The other user is correct. :)
50% by mass of a 2.2 moles
mixture of He and Ar gasses .
Calculate the mole number of He
in the mixture?
Mol He in the mixture = 2
Further explanationGiven
50% by mass
2.2 moles of mixture
Required
The mole number of He
Solution
50% by mass⇒ mass of He : mass of Ar = 1 : 1
Mol He = 2.2 - mol Ar
mass He = mass Ar
mol x MW He = mol x MW Ar
(2.2-mol Ar) x 4 = mol Ar x 40
8.8 - 4 mol Ar = 40 mol Ar
8.8 = 44 mol Ar
mol Ar= 0.2
mol He = 2.2 - 0.2 = 2
What is the sum of the coefficients needed to balance the combustion reaction of methane?
Answer: The sum of the coefficients needed to balance the combustion reaction of methane is 6.
Explanation:
Combustion is a chemical reaction in which hydrocarbons are burnt in the presence of oxygen to give carbon dioxide and water.
According to the law of conservation of mass, mass can neither be created nor be destroyed. Thus the mass of products has to be equal to the mass of reactants. The number of atoms of each element has to be same on reactant and product side. Thus chemical equations are balanced.
The chemical equation for combustion of methane will be :
[tex]CH_4+2O_2\rightarrow CO_2+2H_2O[/tex]
The coefficient foer methane is 1 , 2 for oxygen , 1 for carbon dioxide and 2 for water. The sum is 6.
What cell structure is found only in Eukaryote cells, but not in Prokaryote cells?
Answer:
Every living organism falls into one of two groups: eukaryotes or prokaryotes. Cellular structure determines which group an organism belongs to. In this article, we will explain in detail what prokaryotes and eukaryotes are and outline the differences between the two.
Explanation:
Answer:
nucleus
Explanation: