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lawyer [7]
3 years ago
10

If you are needing at least 100. grams of HCI to be produced, how many

Chemistry
1 answer:
Charra [1.4K]3 years ago
8 0

Answer:

116.4 g of SiCl4

Explanation:

SiCl4(l) +2H2O(l) -------> SiO2 (s) + 4HCl(aq)

Given this balanced reaction equation which will serve as a guide for our work, we can now look at the stoichiometry of the reaction.

Number of moles of HCl needed = mass of HCl/ molar mass of HCl

Molar mass of HCl= 36.46 g/mol

Number of moles of HCl= 100/36.46 g/mol= 2.74 moles

From the balanced reaction equation;

1 mole of SiCl4 yields 4 moles of HCl

x moles of SiCl4 will yield 2.74 moles of HCl

x= 2.74/4 = 0.685 moles of SiCl4

Therefore mass of SiCl4= number of moles of SiCl4 × molar mass of SiCl4

Mass of SiCl4= 0.685× 169.9 g/mol = 116.4 g of SiCl4

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The pressure in an automobile tire is 2.0 atm at 27°C. At the end of a journey on a hot summer day the pressure has risen to 2.2
Kruka [31]

Hey there!

For this we can use the combined gas law:

\frac{P_{1}V_{1} }{T_{1}} = \frac{P_{2}V_{2} }{T_{2}}

We are only working with pressure and temperature so we can remove volume.

\frac{P_{1} }{T_{1}} = \frac{P_{2} }{T_{2}}

P₁ = 2 atm

T₁ = 27 C

P₂ = 2.2 atm

Plug these values in:

\frac{2atm}{27C} = \frac{2.2atm}{T_{2}}

Solve for T₂.

2atm = \frac{2.2atm}{T_{2}}*27C

2atm * T_{2}={2.2atm}*27C

T_{2}={2.2atm}\div2atm*27C

T_{2}=1.1*27C

T_{2}=29.7C

Convert this to kelvin and get 302.85 K, which is closest to B. 330 K.

Hope this helps!

3 0
3 years ago
Which process causes Earth's surface to warm?
Romashka [77]

Answer:

its B

Explanation:

yes

6 0
3 years ago
Read 2 more answers
Given the following equation: 8Fe+S8=8FeS
maxonik [38]

Answer:

a. 2954g of FeS

b. 1143g of FeS

Explanation:

Based on the reaction:

8 Fe + S₈ → 8 FeS

<em>8 moles of Fe reacts with 1 mole of S₈ to produce 8 moles of FeS</em>

<em />

a. 4.2mol sulfur produce:

4.2mol S₈ × ( 8 mol FeS / 1 mol S₈) = <em>33.6mol FeS</em>. As molar mass of FeS is 87.92g/mol, mass is:

33.6mol FeS × ( 87.92g / 1 mol FeS) = <em>2954g of FeS</em>

<em />

b. 13mol Fe produce:

13mol Fe × ( 8 mol FeS / 8 mol Fe) = <em>13mol FeS</em>. In mass:

13 mol FeS × ( 87.92g / 1 mol FeS) = <em>1143g of FeS</em>

5 0
3 years ago
What happens to the atoms during a chemical reaction
Likurg_2 [28]

Answer:

Atoms get rearranged and make up different molecules. No atoms are created nor destroyed.

Explanation:

6 0
2 years ago
2.20 moles Sn to grams
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261.162 grams. Use the equation n=M÷Mr.
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