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Nookie1986 [14]
3 years ago
10

state the rules governing the number of significant figures that result from each of the following operations addition and subtr

action; mutiplication and divison
Chemistry
1 answer:
lubasha [3.4K]3 years ago
4 0
Adding and subtracting it's how many are behind the decimal, and multiply its how many digits
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motikmotik

Answer: 2. magnesium

Explanation: correct spelling...?

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2 years ago
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What is the name of a compound having the formula Al2O3? (5 points)
Andrew [12]

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4) Aluminum Oxide

Explanation:

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3 years ago
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Calculate the molarity of a solution prepared by dissolving 0.2 mol sucrose in enough water to make a 100 ml solution.
Lelechka [254]

Taking into account the definition of molarity, the molarity of a solution prepared by dissolving 0.2 mol sucrose in enough water to make a 100 mL solution is 2 \frac{moles}{liter}.

<h3>Definition of molarity</h3>

Molar concentration or molarity is a measure of the concentration of a solute in a solution and indicates the number of moles of solute that are dissolved in a given volume.

The molarity of a solution is calculated by dividing the moles of solute by the volume of the solution:

molarity=\frac{number of moles}{volume}

Molarity is expressed in units \frac{moles}{liter}.

<h3>Molarity in this case</h3>

In this case, you have:

  • number of moles= 0.2 moles
  • volume= 100 mL= 0.1 L

Replacing in the definition of molarity:

molarity=\frac{0.2 mole}{0.1 L}

Solving:

<u><em>molarity= 2 </em></u>\frac{moles}{liter}

Finally, the molarity of a solution prepared by dissolving 0.2 mol sucrose in enough water to make a 100 mL solution is 2 \frac{moles}{liter}.

Learn more about molarity:

brainly.com/question/9324116

brainly.com/question/10608366

brainly.com/question/7429224

8 0
2 years ago
How does the volume of water change the solubility of sodium chloride in simple words?
kupik [55]

Answer:

When sodium chloride dissolves in water to make a saturated solution there is a 2.5 per cent reduction in volume. ... The solubility of salt does not change much with temperature, so there is little profit in using hot water.

3 0
3 years ago
Oxygen atoms have six outer electrons<br><br> Write the symbol for an oxide ion.
Shkiper50 [21]

Answer:

O^{2-} is the symbol for an oxide ion

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3 years ago
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