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AlladinOne [14]
3 years ago
5

How many significant figures are in 31400

Chemistry
1 answer:
mr_godi [17]3 years ago
5 0

Answer: The Answer Is 3!

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How many moles (of molecules or formula units) are in each sample?
Alexus [3.1K]

The number of moles in each sample will be 0.391 moles, 30.7 moles, 0.456 moles, and 1350 moles

<h3>What is the number of moles?</h3>

The number of moles of a substance is the ratio of the mass of the substance to the molar mass.

In other words; mole = mass/molar mass.

Thus:

  • moles of 18.0 g NO_2 = 18.0/46

                                   = 0.391 moles

  • moles of 1.35 kg CO_2 = 1350/44

                                         = 30.7 moles

  • moles of 46.1 g KNO_3 = 46.1/101.1

                                          = 0.456 moles

  • moles of 191.8 kg Na_2SO_4 = 191800/142

                                                 = 1350 moles

More on the number of moles of substances can be found here: brainly.com/question/1445383

#SPJ1

5 0
2 years ago
Which equation illustrates conservation of mass?
saul85 [17]
Answer: d

explanation: in both reactants and products there are 2 hydrogen and 2 chlorine atoms
6 0
3 years ago
Please help!! what is the compound of Sr(NO2)2​
valentinak56 [21]

Answer:

I think this is probably the answer you are looking for.

Explanation:

https://youtu.be/PY431ZC5uDc

4 0
2 years ago
Read 2 more answers
Finely ground nickel (II) hydroxide is placed in a beaker of water. It sinks to the bottom of the beaker and remains unchanged.
Luden [163]

Explanation:

Acid-base reaction will give salt and water.

The 2nd option is correct.

6 0
3 years ago
Name three physical properties that differentiate oxides from hydroxide group of minerals.
erik [133]

Answer:

2k20

Explanation:

3 0
3 years ago
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