CHEMISTRY HIGH SCHOOL

Properties of a solution that depend only on the ratio of the number of particles of solute and solvent in the solution are known as:intensive properties

extensive properties

colligative properties

chemical properties

Answers

Answer 1
Answer: Properties of a solution that depend only on the ratio of the number of particles of solute and solvent in the solution are known as colligative properties

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All gaseous mixtures are solutions.

Answers

The statement "All gaseous mixtures are solutions." is true. This is because there are a number of gaseous molecules present in a volume of gas and they are considered solutions.

How might we one day be able to prove the absence of God through science?

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You will never, I believe that the Almighty wouldn't allow this to happen. This is just my belief though. You will have to go to your parents of read up on it your self to really be able to see if there is a way. Ask yourself the question, How am I breathing? Next, ask yourself Were is air provided from? Who provides the air you breath. You really just have to check and look into it your spirit and ask yourself Do I believe in there being a absence of God(which ever god you serve)? If you reply no than science no matter how hard they try will not be able to disprove God.

by the eveloution of the big bang theory

H2(g) + CO2(g) + 10 kcal H2O(g) + CO(g)In another experiment involving the above reaction at 1,000°C, the equilibrium concentrations were found to be:

H2(g) = 2.0 moles per liter
H2O(g) = 4.0 moles per liter
CO2(g) = 5.0 moles per liter
CO(g) = 4.0 moles per liter

What is the equilibrium constant, Keq, for this reaction?

Answers

Answer: The equilibrium constant for the given reaction is 0.8

Explanation:

Equilibrium constant is defined as the ratio of concentration of the products raised to the power its stoichiometric coefficients to the concentration of reactants raised to power its stoichiometric coefficient. It is represented as K_c

For the general equation:

aA+bB\rightleftharpoons cC+dD

The equilibrium constant is represented as:

K_c=([C]^c[D]^d)/([A]^a[B]^b)

For the given chemical equation:

H_2(g)+CO_2(g)+10 kcal\rightleftharpoons H_2O(g)+CO(g)

K_c for this equation is given by:

K_c=([H_2O][CO])/([H_2][CO_2])

Concentration at equilibrium of

H_2=2mol/L\nH_2O=4mol/L\nCO_2=5mol/L\nCO=4mol/L

Putting values in above equation, we get:

K_c=(4* 4)/(2* 5)\nK_c=0.8

Hence, the equilibrium constant for the given chemical reaction is 0.8
This might be a little hard for me but I got it. So you have 2.0, 4.0, 5.0 and 4.0. Subtract from 3.0 - 2.0 = 1.0 and 4.5 - 2.0 = 2.5.

So now we have other answers. 

H20, H2, CO2 and CO

Keq reaction for each formula is 1.6

Welcome :)

Which fraction of a Sr-20 sample remains unchanged after 87.3 years?

Answers

First off there are some issues in your questions but I can still help in answering this type of problem. First, there is no Sr-20. The 4 abundant form includes Sr-84, Sr-88, Sr-87, Sr-86, Sr-84. 
More importantly, the half life of strontium must be given. 

For demonstration sake, let us assume Sr-85 is the isotope. It has a half-life of 64.853 days and I'm assuming the units of 87.3 is in days. 

A/Ao = e^-(ln2/t)T

where A- final amount Ao -initial amount t- halflife T-total time elapsed

% = e^-(ln2/64.853)(87.3) = 0.3933 or 39.33%

A metal melts at 450 degrees celsius. Is this property of the metal classified as chemical or physical?

Answers

Answer:

physical

Explanation:

because if you let it cool down it will turn back into its original form

Environmental science is the study of

Answers

Answer: Environment and the ecology.

Explanation:

The environmental science studies various aspects of environment involving the living and non- living components and their interaction. The ecology is the branch of environmental science which deals with the study of ecology in which involves the interaction of living beings with their non-living physical environment and with each other.
The environment and it's ecosystems.
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