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3 years ago

7

These mixed messages be impossable

2 answers:

lara [203]3 years ago

7 0

What...
Thanks for the points

Hitman42 [59]3 years ago

6 0

Answer:

What?

Explanation:

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If more products are present in a mixture ,what can be said of the reversible reaction?

motikmotik

D. The reaction occurring in the forward direction is favored.

<span>In a reversible reaction, both the forward and reverse reactions take place (at equilibrium) </span>
<span>A. at the same rate </span>

<span>Which of the following is untrue concerning a reversible reaction? (at equilibrium) </span>
<span>D. The reaction could spend more time in the reverse direction than in the forward direction. </span>

<span>A reversible reaction </span>
<span>C. always starts off in the forward direction. </span>

<span>All reversible reactions will reach chemical _____. </span>
<span>D. equilibrium</span>

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3 years ago

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0.1005 liters is the same as??

olga2289 [7]

100.5cm or 100.5ml

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4 years ago

Which of these is a carbohydrate?<br> O C6H1206<br> O C6H6012<br> C6H1302N<br> C3H7O2NS

amm1812

Answer: The answer is the second choice.

Explanation:

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3 years ago

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If a bag of cement of mass 50 kg is acted upon by a force which produces acceleration 20m/ s calculate the force if you don't kn

dybincka [34]

Answer:

F=1000kg/m/s²

Explanation:

F=ma

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8 0

3 years ago

In the laboratory, hydrogen gas is usually made by the following reaction: Zn(s) + 2 HCl(aq) → H2(g) + ZnCl2(aq) How many liters

IrinaK [193]

<u>Answer:</u> The volume of hydrogen gas collected over water is 2.13 L

<u>Explanation:</u>

To calculate the number of moles, we use the equation:

$\text{Number of moles}=\frac{\text{Given mass}}{\text{Molar mass}}$

Given mass of zinc = 5.566 g

Molar mass of zinc = 65.4 g/mol

Putting values in above equation, we get:

$\text{Moles of zinc}=\frac{5.566g}{65.4g/mol}=0.0851mol$

For the given chemical reaction:

$Zn(s)+2HCl(aq.)\rightarrow H_2(g)+ZnCl_2(aq.)$

As, HCl is present in excess. So, it is considered as an excess reagent.

Zinc is considered as a limiting reagent because it limits the formation of product.

By Stoichiometry of the reaction:

1 mole of zinc produces 1 mole of hydrogen gas.

So, 0.0851 moles of zinc will produce = $\frac{1}[1}\times 0.0851=0.0851mol$ of hydrogen gas

To calculate the volume of hydrogen gas, we use ideal gas equation, which is:

PV = nRT

where,

P = Pressure of hydrogen gas = Total atmospheric pressure - vapor pressure of water = (752 - 18.65) mmHg = 733.35 mmHg

V = Volume of the hydrogen gas

n = number of moles of gas = 0.0851 moles

R = Gas constant = $62.3637\text{ L.mmHg }mol^{-1}K^{-1}$

T = Temperature of hydrogen gas = $21^oC=[21+273]K=294K$

Putting values in above equation, we get:

$733.35mmHg\times V=0.0851mol\times 62.3637\text{ L.mmHg }mol^{-1}K^{-1}\times 294K\\\\V=\frac{0.0851\times 62.3637\times 294}{733.35}=2.13L$

Hence, the volume of hydrogen gas collected over water is 2.13 L

5 0

3 years ago