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ICE Princess25 [194]
2 years ago
11

(multiple choice) What is the SI unit of mass?

Chemistry
1 answer:
SpyIntel [72]2 years ago
5 0

Answer:

Gram

Explanation:

The SI unit of mass is grams.

Mass is the measure of matter contained in a substance. It is usually determined by weighing an amount of substance on a balance or scale.

  • Mass is a fundamental quantity
  • So, the unit of mass is grams.
  • Ounce and pounds are other units but not the standard one.
  • Newton is the unit of force and weight.
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Why is the composition of the vapor different from the composition of the solution?
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If there is solution with nonvolatile solute (<span>substance that does not readily </span>evaporate<span> into a </span>gas) <span>only the pure vapor of the solvent is present above the solution and solute stays in solution and do not enters vapor above solution. This is because nonvolatile solute has slow rate of evaporation and low vapore pressure.
If solution has two volatile components, composition of the vapor depends on vapor pressures of the components according </span><span>Raoult's Law.</span>
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3 years ago
To make a sarurated solution, 36 g of sodium chloride is dissolved in 100 g of water at 293 k . Find its concentration at this t
nexus9112 [7]

Answer:

The answer is "26.47\%"

Explanation:

Sodium chloride  solute mass=36 \ g

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Calculating the solution mass = Solute mass  + solvent mass

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Calculating the percentage of concentration:

= \frac{solute\ mass}{solvent\ mass} \times 100\\\\=\frac{36\ grm}{136\ grm} \times 100\\\\=0.2647 \times 100\\\\=26.47 \%

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3 years ago
Should I use flex seal to clean a baby
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2 years ago
Three elements are represented by the letters A, B, and C. the three elements have the same number of valence electrons. Element
AfilCa [17]
Answer:
A- beryllium
B- calcium
C- magnesium

Explanation
NOTE: all element in group 2 have 2 balance electrons

First let’s start with B- number of electrons= number of protons which is equal to the atomic number. therefore, the answer is calcium as it’s atomic number is 20

C- magnesium will have three energy levels considering it has 12 electrons (2,8,2).

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