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stira [4]
3 years ago
14

How many moles are in 1.4 x 10^21 atoms of sodium?

Chemistry
1 answer:
Zepler [3.9K]3 years ago
3 0

Answer:

devide by avogadro constant 6.02*10^23

Explanation:

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How do you calculate the mass of a product when the amounts of more than one reactant are given?
chubhunter [2.5K]

you add the masses of the reactants, because of conservation of mass. if there are two or more products they will ask you to find the mass of only one product or the sum of the mass of all products

3 0
3 years ago
What is the molar mass of cholesterol if 0.00105 mol weigh 0.406 g?
Rudiy27

Answer:

387 g/mol

Explanation:

The molar mass is a ratio comparing a substance's mass and molar value. The specific ratio looks like this:

Molar Mass (g/mol) = mass (g) / moles

You can plug the given values into the ratio to find the molar mass.

Molar Mass = mass / moles

Molar Mass = 0.406 g / 0.00105 mol

Molar Mass = 387 g/mol

8 0
2 years ago
Name the following ionic compounds: (a) Na2SO4, (b)Cu(NO3)2 (c) Fe2(CO3)3
Sindrei [870]

Answer and Explanation:

(a) Na_2So_4 : its chemical name is sodium sulfate in which sodium is present as Na_2^+ and sulfate is present as So_4^{2-}

(b) Cu(NO_3)_2 : Its chemical name is copper nitrate which is a inorganic compound which is mostly crystalline in nature

(c)Fe_2(Co_3)_2 : Its chemical name is iron carbonate or ferric carbonate

5 0
4 years ago
The sum of two numbers is 54 one exceed the other by 14 find the number​
Aneli [31]

Answer:

x=34

y=20

Explanation:

let the first number be 'x'

let the second number be 'y'

Equation 1:-

x + y = 54

Equation 2:-

x = y + 14  (Since one exceeds the other by 14)

Substituting Equation 2 in Equation 1:-

(y + 14) + y = 54

=> y + 14 + y = 54

=> 2y + 14 = 54

=> 2y = 54 - 14

=> 2y = 40

=> y = 40/2

=> y = 20

Now in Equation 1:-

x + y = 54

Substituting y=20,

x + 20 = 54

x = 54 - 20

x = 34

7 0
3 years ago
write down the name and molecular formula of the compound which gives hydrogen ion and chloride ion in the solution state. ​
podryga [215]

Answer:

Hydochloric acid

HCl

Explanation:

The name of the compound that gives hydrogen ion and chloride ions in the solution state is Hydrochloric acid.

Hydrochloric acid is made up of one atom of hydrogen and 1 atom of chlorine. We can also say, it is made up of 1 mole of hydrogen and 1 mole of chlorine.

 The formula of this compound is HCl;

 In solution:

               HCl_{aq}    →   H⁺    +    Cl⁻  

8 0
3 years ago
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