Chemistry, 26.02.2020 22:51 eweqwoewoji

A substance is analyzed and found to consist of 0.360 g of Na, 0.220 g of N, and 0.752 g of O. How many moles of Na, N, and O are present? What is its empirical formula? What is its name?

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Answer from: emmaogle2003

1. The number of mole of each element present = 1mole of Na, 1mole of N and 3moles of O

2. The empirical formula is NaNO3.

3. The name of the compound is sodium trioxonitrate (V)

Explanation:

Mass of Na = 0.360g

Mass of N = 0.220g

Mass of O = 0.752g

Number of mole present for each elements is given below:

For Na:

Molar Mass of Na = 23g/mol

Number of mole = Mass /Molar Mass

Number of mole of Na = 0.360/23 = 0.0157mol

For N:

Molar Mass of N = 14g/mol

Number of mole = Mass /Molar Mass

Number of mole of N = 0.220/14 = 0.0157mol

For O:

Molar Mass of O = 16g/mol

Number of mole = Mass /Molar Mass

Number of mole of = 0.752/16 = 0.047mol

Next we'll divide the moles of Na, N, and O obtained by the smallest mole among them i.e 0.0157

For Na:

0.0157/0.0157 = 1

For N:

0.0157/0.0157 = 1

For O:

0.047/0.0157 = 3

The number of mole of each element present = 1mole of Na, 1mole of N and 3moles of O

Therefore, the empirical formula is NaNO3.

The name of the compound is sodium trioxonitrate (V)

Answer from: Quest

Mass is the amount of matter in an object. weight is the measurement of the pull of gravity on an object. say for example, you travel to the moon which has a different gravitational field compared to the gravitational field of earth. (gravitational fields: earth = 1, moon = 0.165) now when you are on the moon, the pull of gravity on you is different than on the earth. and as weight is the measurement of the pull of gravity on an object, that means yes, your weight can and will change on the moon. however, on the moon, on earth or even on jupiter, the amount of mass inside of you remains the same. meaning your physical mass remains constant. in conclusion it is possible for your weight to change as your mass remains constant.

Answer from: Quest

the answer is yes

it has kinetic energy

reason

an object has kinetic energy when you stop the force carrying it, the object will stay in motion.

hope this contact me for more questions if you'd like: )

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A substance is analyzed and found to consist of 0.360 g of Na, 0.220 g of N, and 0.752 g of O. How m...