CHEMISTRY HIGH SCHOOL

The molar mass of nitrogen (N2) is 28.02 g/mol. What is the mass, in grams, of 4.60 mol of N2?0.164
6.09
23.4
129

Answers

Answer 1
Answer: Molar mass nitrogen ( N2 ) = 28.02 g/mol

1 mol N2 -------> 28.02 g
4.60 mol ---------> x g

x = 4.60 * 28.02

x = 129 g of N2

hope this helps!.
Answer 2
Answer:

Answer:

Option D: 129 grams

Explanation:

edge! hope this helps

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When three pairs of electrons are shared in a molecule, what shape will the molecule be?a. tetrahedral
b. trigonal planar
c. bent
d. linear

Answers

The correct answer is B. The shape of a molecule where three pairs of electrons are shared is a trigonal planar. This is characterized by one central atom and three atoms forming an equilateral triangle which is bonded to the central atom.

Answer:

Trigonal Planar is the correct answer.

How many grams of Cl are in 535 g of CaCl2?

Answers

m(Ca Cl_(2))=535 g
m(Cl)=?
The molar mass of CaCl_(2) = 40.08 + 2 * 35.45 = 110.98 
The atomic mass of Cl: 35.45 ( you can see it in the Periodic table) 
110.98 g CaCl_(2)- 35.45 * 2 g Cl
535 g CaCl_(2) - x g Cl
Proportion:
110.98 : 535 = (35,45 * 2) : x
x = 535 * 35.45 * 2 / 110.98 = 37,931.5/110.98 = 341.79 g
Answer: m(Cl)=341.79 g

The electron configuration of nitrogen (N)

Answers

nitrogen atomic no.=7
electron=7its electronic configuration =1s2 2s2 2p3

Answer:

2,5 or 7

Explanation:

You are given 50.0 ml of 1.50 m hno3. how many ml of 0.81 m naoh are needed to neutralize it?

Answers

V(HNO₃) = 50.0 mL in liters = 50.0 /1000 =0.05 L
M(HNO₃) = 1.50 M

Number of moles HNO₃ :

n = M x V

n = 1.50 x 0.05

n = 0.075 moles of HNO₃

HNO₃ + NaOH = H₂O + NaNO₃

1 mole HNO₃ -------- ---1 mole NaOH
0.075 moles HNO₃ ---- ?

moles NaOH = 0.075 * 1 / 1

 = 0.075 moles of NaOH

V ( NaOH ) :

M = n / V

0.81 = 0.075 / V

V = 0.075 / 0.81

V = 0.0925 L or  92.5 mL 

hope this helps!

Environmental science is the study of

Answers

Answer: Environment and the ecology.

Explanation:

The environmental science studies various aspects of environment involving the living and non- living components and their interaction. The ecology is the branch of environmental science which deals with the study of ecology in which involves the interaction of living beings with their non-living physical environment and with each other.
The environment and it's ecosystems.

12a. Do i need to find the morality of each ion in the solution to get to the moles? Or do i just do AlCl3

Answers

You just use the morality of the solution, you found out that you have 0.0046mol (about 0.005mol0 of AlCl3, so then since there is 1 Al in a single molecule, you have the number of moles of aluminum, but since there is Cl3 (3 atoms of chlorine per molecule), just multiply the number of moles of molecules by the number of atoms of that type inside a single molecule, to get [Cl-] = 0.0138mol (or round to 0.014)
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