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anzhelika [568]
3 years ago
7

What would you multiply "grams of barium" by to get the units "moles of barium" ?

Chemistry
1 answer:
solmaris [256]3 years ago
6 0
Moles = weight in grams / molecular weight.

So I would divide the "grams of barium" by its molecular weight (which is 137.3) to get "moles of barium". :)
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What question could you ask about the components of two atoms to find out if the atoms are of the same elements or of different
Temka [501]
The number of protons and the electron configuration of each
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Consider the following reversible reaction. mc030-1.jpg What is the equilibrium constant expression for the given system?
Ann [662]
Since you have not included the given reaction, I am going to explain you how to solve these kind of problems.

1) The chemical equilibrium is a dynamic process. It means that in an equilibrim reaction there are two rectaions, the forward reaction and the reverse reaction whose velocities are the same.

2) The general equation of a a chemical reaction in equlibrium is:

aA + bB ⇄ cC + dD
Where A and B are the reactants, C and D are the products, and a, b, c, d, are the coefficientes in the balanced equation.

3) So, the equilibrium law is:

Keq= \frac{C]^c[D]^d}{[A]^a[B]^b}

Where Keq is the constant of equilibrium

4) To complete the explanation, I am going to deal with an example:

i) Consider the equlibrium reaction between hydrogen and iodine:

H₂ (g) + I₂(g)   ⇄  2HI(g)

ii) The forward reaction is H₂ (g) + I₂(g)   →  2HI(g)

iii) The reverse reaction is 2HI (g) → H₂ (g) + I₂(g)

iv) The law of equilibrium is:

Keq= \frac{[HI]^2}{[H_2][I_2]}


4 0
3 years ago
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What type of mountain is created when rock layers are pushed up by forces inside the Earth?
dedylja [7]
B  i think hope this helps! I had this on a test not to long ago and did b and it worked!
6 0
4 years ago
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5. mathematically describes the relationship between pressure, volume and
REY [17]

Answer:

when a gas particles are constant, the temperature has to be low,the volume of a gas wil automatically be high and the pressure low

Explanation:

this is because when temperature is increased,the gas wil become light meaning its volume will be low and it makes the gas to move rapidly meaning the pressure will increase

5 0
2 years ago
A chemist must prepare 550.0 ml of hydrochloric acid solution with a pH of 1.60 at 25°C . He will do this in three steps: Fill a
horsena [70]

Answer:

Vol concentrated HCl needed = 1.73 ml

Explanation:

Prep 550 ml of HCl(aq) solution with pH = 1.60 at 25°C using 8M stock concentrate.

[HCl] = [H⁺] = 10⁻¹°⁶⁰M = 0.0251M HCl(aq)

Molarity Concentrate x Volume Concentrate = Molarity Dilute x Volume Dilute

8M x Vol Conc. = 0.0251M x 550ml

Vol Conc needed = 0.0251M x 550 ml / 8M = 1.73 ml of concentrate

Mixing => to the quantity of water in the mixing flask transfer 1.73 ml of the 8M HCl concentrate solution and dilute up to but not to exceed the calibration mark on the mixing flask.

4 0
3 years ago
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