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MariettaO [177]
3 years ago
14

In the combination reaction between oxygen and magnesium, 12.25 grams of

Chemistry
1 answer:
stepan [7]3 years ago
4 0

Answer:

2 Mg + O2 → 2 MgO b. From the reaction in the previous question, how many moles of oxygen are needed to completely react with 12 moles of magnesium.

Explanation:

hope this helps

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1. A balloon contains 100g of oxygen gas (O₂) when the volume is 110 dm³. Find the volume of the balloon when the mass of oxygen
igor_vitrenko [27]

The volume of the balloon when the mass of oxygen gas is decreased to 50g is 50L.

We will use the ideal gas equation-

<u>PV=nRT</u>

P=Pressure

V=volume

n=no. of moles

T=temperature

In this question temperature and pressure will remains constant then the above equation can be rewritten as-

V_{1} /n_{1} =V_{2} /n2

where V1= initial volume of the balloon

            V2=  volume of the balloon when the mass of oxygen gas is decreased to 50g

now, substitute the values in the above equation-

  • V1=100dm3=100L
  • n1=100/32=3.12
  • n2=50/32=1.56

       100/3.12=V2/1.56

  • V2=50 L

hence, the volume of the balloon when the mass of oxygen gas is decreased to 50g is 50L.

learn more about the ideal gas equation here:

brainly.com/question/1056445

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2 years ago
Which of the following are physical rather than chemical properties of hydrogen gas(H2)? Check all that applya. H2 gas does not
Setler [38]

Answer: a, b, d

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Examples of physical properties in the context included in the question are the following: • Temperature • Solubility • Resistivity • Conductivity • Density

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30 POINTS TO WHOEVER ANSWERS!!!
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