All categories

3 years ago

What is the molar mass of 12?

Chemistry

1 answer:

andrew-mc [135]3 years ago

3 0

Answer:

I assume your talking about carbon when you say 12 so it'd be 12 grams if you are

Explanation:

The molar mass of any substance in grams per mole is numerically equal to the mass of that substance expressed in atomic mass units.

Hope this helps you some

You might be interested in

Which of the following is the valence elec- tronic structure for a halogen? 1. n s1 2. n s2 3. n s2 n d10 4. n s2 n p5 5. n s2 n

Arturiano [62]

Answer: option 4. ns² np⁵

Explanation:

The valence electronic structure of the compounds is the distribution of the valence electrons, i.e. the outermost electrons of the atoms.

The distribution of the electrons in the atomic orbitals is named electron configuration.

Each element has a proper electron configuration which is determined according to a series of rules: lowest orbital energy, Pauli's exclusion principle and Hund's rule.

The valence electronic structure of the atoms is related with the period (column of the periodic table) to which the element belongs.

Each period has a characteristic valence structure (number and location of the outermost electrons). It is this structure what conferes the elements of a same period (column in the periodic table) their similar chemical properties.

This table summarizes the valence eletronic structure of the representative elements:

Period (column) name number of valence eletrons Structure

1 Alkali metals 1 ns¹

2 Alkaline earth metals 2 ns²

13 3 ns² np¹

14 4 ns² np²

15 Pnictogens 5 ns² np³

16 Chalcogens 6 ns² np⁴

17 Halogens 7 ns² np⁵

18 Noble gases 8 ns² np⁶

There you can see that the halogens belong to the period 17, have 7 valence electrons, and their valence electrons are have the structure ns² np⁵.

This is the specific valence electronic structure for the first five halogens:

Halogen atomic number row (n) period valence electronic structure

Fluor 9 2 15 2s² 2p⁵

Chlorine 17 3 15 3s² 3p⁵

Bromine 35 4 15 4s² 4p⁵

Iodine 53 5 15 5s² 5p⁵

Astatine 85 6 15 6s² 6p⁵

There you see the common structre ns² np⁵.

8 0

4 years ago

Calculate the molecular mass of the nonionic solutes.

3241004551 [841]

Answer:

The molecular mass of the nonionic solutes is 124,90 g/m

Explanation:

This is the formula for boiling point elevation.

ΔT = Kb . m

Where ΔT = Tb (solution) - Tb (pure solvent)

Where Kb = the ebullioscopic constant

Where m = molality (moles of solute in 1kg of solvent)

Kb for water is 0,512°C/molal

100,680°C - 100°C = 0,512°C/molal . m

0,680°C = 0,512°C/molal . m

0,680°C /0,512 molal/°C = m

1,32 molality (This are my solute moles in 1kg (1000g) of solvent but I have just 390 g, so let's build the rule of three)

1000 g _____ 1,32 moles

390 g ______ (3,90 g . 1,32 moles) / 1000 g = 0,5148 moles

Molecular mass = g/ mol (mass/moles)

64,3 g /0,5148 moles = 124,90 g/m

8 0

3 years ago

Strontium combines with bromine to form strontium bromide.What happens to the electrons in the outer levels when strontium atoms

Nataly [62]

Answer:

Im bad at these questions but i think the answer is SrBr2

Explanation:

8 0

3 years ago

Signals from the make skeletal muscles move. A. Nervous system B.

Artemon [7]

Answer:

Signals from the A. Nervous system make the skeletal muscles move.

7 0

3 years ago

How to find the charge of an element

katrin2010 [14]

Answer:

the atomic number is how you find the charge

7 0

4 years ago