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ser-zykov [4K]
3 years ago
6

Therefore, the independent variable was _____ and the dependent variable was _____

Chemistry
1 answer:
Ivahew [28]3 years ago
3 0
Pressure and temperature
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1) A 10g sample of H2(g) reacts with a 22g sample of O2(g) according to
solmaris [256]

Answer:

H₂ is excess reactant and O₂ the limiting reactant

Explanation:

Based on the chemical reaction:

2H₂(g) + O₂(g) → 2H₂O

<em>2 moles of H₂ react per mole of O₂</em>

<em />

To find limiting reactant we need to convert the mass of each reactant to moles:

<em>Moles H₂ -Molar mass: 2.016g/mol-:</em>

10g H₂ * (1mol / 2.016g) = 4.96 moles

<em>Moles O₂ -Molar mass: 32g/mol-:</em>

22g O₂ * (1mol / 32g) = 0.69 moles

For a complete reaction of 0.69 moles of O₂ are needed:

0.69mol O₂ * (2mol H₂ / 1mol O₂) = 1.38 moles of H₂

As there are 4.96 moles,

<h3>H₂ is excess reactant and O₂ the limiting reactant</h3>
7 0
3 years ago
<img src="https://tex.z-dn.net/?f=so%282%29%20%2B%20o%282%29%20%3D%20so%283%29" id="TexFormula1" title="so(2) + o(2) = so(3)" al
Hitman42 [59]

Answer:

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3 0
2 years ago
A sample of nitrogen gas has a pressure of 7.58 kPa at 639 K. What will be the pressure at 311 K if the volume does not change?
omeli [17]
Over here you have to use the formula: <span>P1/T1= P2/T2
P1= 7.58
T1= 639

P2= ?
T2= 311

</span><span>7.58/639 = ?/311
</span>= 3.689 kPa
7 0
3 years ago
Read 2 more answers
What is the mass of 99.0 L of NO2 at STP?
vekshin1

Mass of NO₂= 203.32 g

<h3>Further explanation</h3>

Given

99.0 L of NO₂

Required

Mass of NO₂

Solution

Conditions at T 0 ° C and P 1 atm are stated by STP (Standard Temperature and Pressure). At STP, Vm is 22.4 liters / mol.

So mol NO₂ :

= 99 : 22.4

= 4.42

Mass :

= mol x MW

= 4.42 x 46 g/mol

= 203.32 g

7 0
3 years ago
What mass of silver has a volume of 105.0 cm^3? The density of silver is 10.50 g/cm^3
sammy [17]

Answer:

<h2>mass = 1102.50 g</h2>

Explanation:

The density of a substance can be found by using the formula

Density =  \frac{mass}{volume}

Making mass the subject we have

<h3>mass = Density × volume</h3>

From the question

Density of silver = 10.50 g/cm³

Volume = 105 cm³

Substitute the values into the above formula and solve for the mass

That's

mass = 10.5 × 105

We have the final answer as

mass = 1102.50 g

Hope this helps you

4 0
3 years ago
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