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3 years ago

Which of the following is a unit of mass? A) A meter B) A liter C) a kelvin D) a kilogram

Chemistry

2 answers:

lora16 [44]3 years ago

6 0

A kilogram is a unit of mass. A meter is a unit of measurement, a Liter is volume and a kelvin is temperature

baherus [9]3 years ago

5 0

D) a kilogram

hope this helps

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Calculate the average atomic mass of element X using the table below. Then use the periodic table to identify the element. Separ

Ksenya-84 [330]

Answer:

126.8, Iodine

Explanation:

mass ×abundance/100
(126.9045×80.45/100)+(126.0015×17.23/100)+(128.2230×2.23/100)
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IODINE has an atomic mass of 126.8 or 126.9

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3 years ago

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What is the concentration of a solution with a volume of 2.5 liters containing 600 grams of calcium phosphate?

trapecia [35]

Answer:

1.12M

Explanation:

Given parameters:

Volume of solution = 2.5L

Mass of Calcium phosphate = 600g

Unknown:

Concentration = ?

Solution:

Concentration is the number of moles of solute in a particular solution.

Now, we find the number of moles of the calcium phosphate from the given mass;

Formula of calcium phosphate = Ca₃PO₄

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Number of moles of Ca₃PO₄ = $\frac{600}{215}$ = 2.79moles

Now;

Concentration = $\frac{Number of moles }{volume }$

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3 years ago

Two chemist are trying to determine if their water sample is a mixture or pure substance. In their investigation they first filt

Effectus [21]

The correct answer is option B. Dirty water is a mixture of solid particles and liquid. It is both a mixture and pure substance.

The dirty water sample has both gravel and liquid water in it. After filtration the gravel is removed so the water sample looks clearer than before filtration. Liquid water is a pure substance because it is a compound that is made up of elements hydrogen and oxygen. Now the gravel is only physically combined with the liquid water, thus giving the water sample properties of a mixture. And like any mixture, gravel is physically separated through filtration from the liquid water.

Thus the water sample of the chemists is both a mixture and pure substance.

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4 years ago

25. Which answer best describes the continental rise? area of land that drops toward deep ocean basins 75 mile shallow flat area

Hatshy [7]

Answer:

Thick deposits of sediments carried off of the shelf

Explanation:

The continental rise is a thick deposit of sediments that accumulate between the continental slope and the abyssal plain

A is wrong. The area of land that drops toward the deep ocean basins is the continental slope.

B is wrong. The 75-mile shallow flat area just off coastlines is the continental shelf.

D is wrong. The surf area along coastlines is the surf zone .

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3 years ago

Which of the following is a unit of mass? A) A meter B) A liter C) a kelvin D) a kilogram ​

Which of the following is a unit of mass? A) A meter B) A liter C) a kelvin D) a kilogram