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love history [14]
3 years ago
10

The ___ is the best part of an experiment that is not being tested and it used for comparison

Chemistry
2 answers:
Anettt [7]3 years ago
5 0
The answer is control 








aleksandr82 [10.1K]3 years ago
3 0
The control is the part of an experiment that is not being tested and it is used for comparison. 
The control is the best way for us to understand how the variables effect our experiments. 
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The Law of Conservation of Mass states that ____
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I will mark you brainlist please help

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If I have 20g of Sodium, how many moles of Sodium Oxide (Na2O) can be made?
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What is the pOH of a solution with [OH^ - ]=1.4*10^ -13
Dimas [21]

Answer:

12.9

Explanation:

From the question given, the concentration of the hydroxide ion is given:

[OH^-] = 1.4 x 10^ -13M

pOH =?

pOH = —Log [OH^-]

pOH = —Log 1.4 x 10^ -13

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6 0
3 years ago
Consider the unbalanced equation for aluminum and oxygen producing aluminum oxide: Al + O₂ → Al₂O₃. Which of the following shows
DIA [1.3K]

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6 0
3 years ago
You have 67.2 liters of oxygen at standard temperature and pressure. How many moles of oxygen molecules do you have? *
enot [183]

Answer:

Number of moles is 3.0moles

Explanation:

Volume (v) = 67.2L

Pressure at STP = 1atm

Temperature at STP = 273.15K

R = 0.082J/mol.K

Number of moles (n) = ?

From ideal gas equation,

PV = nRT

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R = ideal gas constant

T = temperature of the gas

PV = nRT

solving for n,

n = PV / RT

n = (1.0 * 67.2) / (0.082 * 273.15)

n = 67.2 / 22.398

n = 3.0 moles

The number of moles present is 3.0

3 0
3 years ago
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