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2 years ago

What is the unit of relative atomic mass, atomic mass and average atomic mass?

1 answer:

3 0

The atomic mass of an element is the average mass of the atoms of an element measured in the atomic mass unit (AMU, also known as daltons, D). The atomic mass is a weighted average of all of the isotopes of that element, in which the mass of each isotope is multiplied by the abundance of that particular isotope.

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Dolomite is a carbonate of magnesium and calcium. Analysis shows that 7.81 g of dolomite contains 1.70 grams of Ca. Fluorite is

andrew11 [14]

Answer:

The richer source of calcium is fluorite.

Explanation:

Percentage of element in compound :

$=\frac{\text{mass of element}}{\text{Mass of compound}}\times 100$

1. Dolomite is a carbonate of magnesium and calcium:

Given mass of dolomite = 7.81 g

Mass of calcium present in given mass of dolomite = 1.70 g

Percentage of calcium in Dolomite:

$=\frac{1.70 g}{7.81 g}\times 100=21.77\%$

2. Fluorite is a mineral of calcium and fluorine:

Given mass of fluorite = 2.76 g

Mass of fluorine present in given mass of fluorite = 1.34 g

Percentage of fluorine in fluorite :

$=\frac{1.34 g}{2.76 g}\times 100=48.55\%$

Percentage of calcium in fluorite = 100% - 48.55 % = 51.45%

Percentage of calcium in fluorite > Percentage of calcium in Dolomite

51.455 > 21.77%

So, the richer source of calcium is fluorite.

7 0

3 years ago

How much light would be absorbed by the different drinks?

VikaD [51]

It three rawrrrrrrrrrrrrr

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3 years ago

The atom of element has 25 electrons and 30 neutrons write down its atomic number and mass number.

den301095 [7]

Answer:

Atomic number = 25 protons

Mass number = ( 25 + 30 ) = 55

8 0

3 years ago

Read 2 more answers

Fluoride ion is poisonous in relatively low amounts: 0.2 g of F− per 70 kg of body weight can cause death. Nevertheless, in orde

Jobisdone [24]

Answer:

200 L per day

Explanation:

If there is 1 mg of F- per L of water, we can calculate the volume for 2 g like this:

1) Converse the toxic mass of fluoride to miligrams

1 g ------- 1000 mg

0.2 g ---- X

X = 200 mg

2) Calculate the liters of fluoridated drinking water that a person can consume to reach 200 mg

1 mg -------- 1 L

200 mg ---- X

x = 200 L

4 0

3 years ago

Read 2 more answers

2 Zn + 2HNO2-> 2 ZN(NO2)2 + H2

Aliun [14]

It 6.8 so there you go And this answer is Long because I just need points lol

8 0

3 years ago