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lesantik [10]
3 years ago
15

PLEASEEEE HELP :')

Chemistry
1 answer:
mel-nik [20]3 years ago
7 0

Answer:

340 grams Ca₃P₂ (2 sig. figs.)

Explanation:

   3Ca     +     2P     =>    Ca₃P₂

5.6 mole + excess =>   ? grams

Convert the 'known' to a coefficient of 1 by dividing all coefficients by 3.

=>  Ca   +   2/3P   =>    1/3Ca₃P₂

From the above, 1 mole of Ca => 1/3 mole Ca₃P₂  

∴ 5.6 mole Ca in an excess of P => 1/3(5.6 mole) Ca₃P₂

=> 1.8666 mol Ca₃P₂ (calculator answer) ≅ 1.9 mol Ca₃P₂

=> 1.9 mole x 182 g Ca₃P₂/mol Ca₃P₂ = 339.73333 grams Ca₃P₂

≅ 340 grams Ca₃P₂ (2 sig. figs.)

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The reaction system
tankabanditka [31]

Answer:

e. As equilibrium is reestablished, the partial pressure of hydrogen decreases.

Explanation:

Hello,

In this case, for the given chemical reaction:

CS_2(g) + 4H_2(g)\rightleftharpoons CH_4(g) + 2H_2S(g)

Considering the Le Chatelier's principle which states that adding more reactant shifts the reaction towards the products, condition that is related with the doubling of the hydrogen partial pressure, we can notice that e. As equilibrium is reestablished, the partial pressure of hydrogen decreases since the addition of hydrogen will be used to form more methane and hydrogen sulfide, for that reason, its amount is decreased to reattain equilibrium.

Regards.

3 0
3 years ago
At 25°C and 1.0 atm, 0.84 g of a gas dissolves in 2.00 L of water. What mass of the gas dissolves
UNO [17]

The mass of the gas dissolved in 1.00 L of water at 25°C and 3.0 atm is equal to 1.26 grams.

<h3>How to determine the mass of the gas dissolved?</h3>

In order to determine the mass of the gas dissolved, we would the calculate the new (final) solubility of this gas by applying this formula:

S₁P₂ = S₂P₁

Making S₂ the subject of formula, we have:

S₂ = (S₁P₂)/P₁

S₂ = (0.42 × 3.0)/1.0

S₂ = 1.26 g/L.

Now, we can determine the mass:

Mass = solubility × volume

Mass = 1.26 × 1.00

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Read more on solubility here: brainly.com/question/3006391

#SPJ1

5 0
2 years ago
Identify the reactants and products in this chemical equation below:
Nat2105 [25]

Answer:

Option B

Explanation:

Remember that the products are on the right side of a chemical equation while the reactant is on the left.

In this case we have...

C2H6 + O2 ⇒ CO2 + H2O

Since C2H6 and O2 are on the left side that would mean they're the reactants, while CO2 + H2O are the products. Which means your answer is option B or "C2H6 + O2 are the reactants, CO2 + H2O are the products."

Hope this helps.

4 0
3 years ago
What is one similarity among elements in a group?
Alik [6]
B chemical properties is a right answer
6 0
3 years ago
Can you please explain to me what mole concept is<br><br>​
dybincka [34]

a mole is defined as the amount of substance that contains as many atoms, molecules, icons, electron or any other elementary entities as there are exactly 12 gm of. of carbon atoms. the number of 12 gm of. Is called Avogadro's number

3 0
4 years ago
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