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Paul [167]
3 years ago
13

How does the number of valence electrons in an atom relate to the element's

Chemistry
2 answers:
algol [13]3 years ago
8 0

Answer:

A

Explanation:

mixer [17]3 years ago
3 0
I believe the answer is A
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What is the molecular formula of a compound given the molar mass of the compound is 62.18 g/mol and the empirical formula is c2h
Mariulka [41]
To get the molecular formula we use the individual atomic masses of the atoms making the molecule. Hence, to get the factor by which the empirical formula is multiplied, we divide molar mass by the total of the mass of the atoms making the empirical formula.
(C2H7) the mass of one carbon atoms is 12 so two atoms add up to 24. The mass of one hydrogen atom is 1 a.m.u thus 7 atoms give a total of 7 a.m.u. The sum of the two types of atoms is 24+7= 31
Molar mass=62.18
62.18/31=2.0
Hence, (C2H7) 2=C4H14
5 0
3 years ago
Which compounds are electrolytes
KengaRu [80]

Answer:

Calcium.

Potassium.

Chlorine.

Magnesium.

Sodium.

Phosphate.

Explanation:

4 0
3 years ago
What best explains the type of energy present in the vibrating atoms of a substance? It is thermal energy, which is a type of ki
natima [27]

What best explains the type of energy present in the vibrating atoms of a substance?

The answer is: <u>It is thermal energy, which is a type of kinetic energy. </u>

5 0
3 years ago
Read 2 more answers
Maple syrup, which comes from the sap of maple trees, contains water and natural sugars. It's a clear, brown liquid and the suga
drek231 [11]
What are the options

8 0
3 years ago
A student weighs an empty flask and stopper and finds the mass to be 53.256 g. She then adds about 5 mL of an unknown liquid and
Delvig [45]

Answer:

a. The pressure in the flask open to the atmosphere during the vaporization of the unknown liquid is equal to the prevailing atmospheric pressure equivalent to 0.957734 atm

Explanation:

The mass of the empty flask and stopper, m = 53.256 g

The volume of the unknown liquid she adds = 5 mL

The temperature of the water in which she heats up the flask = 98.8 °C = 371.95 K

The mass of the flask and the condensed vapor = 53.780 g

The volume of the flask, V = 231.1 mL

The atmospheric pressure, P = 728 mm Hg

a. We note that the student stoppers the flask after all the liquid has evaporated. Therefore, given that the flask was open to the atmospheric pressure as the liquid evaporates, the pressure of the vapor in the flask is equal to the prevailing atmospheric pressure, or 728 mmHg

Using a calculator, 728 mm Hg is equivalent to 0.957734 atm.

3 0
3 years ago
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