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3 years ago

Two descriptions about physical quantities are given below:

Chemistry

2 answers:

gladu [14]3 years ago

8 0

Answer:

Quantity A is weight and Quantity B is mass

Explanation: weight has same unit as force. Mass is the quantity of matter present in a body or object

Mumz [18]3 years ago

3 0

Answer:

Quantity A is weight and Quantity B is mass

Explanation:

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What is the protons role in the atom?

Novosadov [1.4K]

The protons inside an atoms nucleus help bind the nucleus together. They also attract the negatively charged electons

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3 years ago

Read 2 more answers

The equilibrium constant, Kc, for the following reaction is 0.967 at 650 K. 2NH3(g) N2(g) 3H2(g) When a sufficiently large sampl

AlekseyPX

Answer: Concentration of $NH_3$ in the equilibrium mixture is 0.31 M

Explanation:

Equilibrium concentration of $H_2$ = 0.729 M

The given balanced equilibrium reaction is,

$2NH_3(g)\rightleftharpoons N_2(g)+3H_2(g)$

Initial conc. x 0 0

At eqm. conc. (x-2y) M (y) M (3y) M

The expression for equilibrium constant for this reaction will be:

3y = 0.729 M

y = 0.243 M

$K_c=\frac{[y]\times [3y]^3}{[x-2y]^2}$

Now put all the given values in this expression, we get :

$K_c=\frac{0.243\times (0.729)^3}{(x-2\times 0.243)^2}$

$0.967=\frac{0.243\times (0.729)^3}{(x-2\times 0.243)^2}$

$x=0.80$

concentration of $NH_3$ in the equilibrium mixture = $0.80-2\times 0.243=0.31$

Thus concentration of $NH_3$ in the equilibrium mixture is 0.31 M

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3 years ago

How many atoms are in<br> 3Ca(CIO3)2

satela [25.4K]

Answer:

Explanation:

Percent composition by element

Element Symbol # of Atoms

Chlorine Cl 2

Calcium Ca 1

Oxygen O 6

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2 years ago

At what temperature would a 1.50 m nacl solution freeze, given that the van't hoff factor for nacl is 1.9? kf for water is 1.86

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Win to ki ne lei ma ki mna mata ki ss kk

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3 years ago

PLEASE HELP

DENIUS [597]

I believe that it is B

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3 years ago