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3 years ago

11

The chemical equation below shows the reaction of sodium (Na)and chlorine (CI)to form sodium chloride (NaCI)

1 answer:

SashulF [63]3 years ago

7 0

In all chemical equations, regardless of the type of reaction that is occurring, the reagents that are on the left side of the arrow are the reactants and on the right your products.

B. Is the solution.

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Which of the following will produce a precipitate?

Marta_Voda [28]

The correct answer is: c) Co2+(aq) + Zn(NO3)2 (aq)

Precipitation reaction can be defined as the process of the formation of an insoluble salt. An insoluble salt is formed when two solutions containing soluble salts are combined (from its aqueous ions). precipitation reaction refers to the. The insoluble salt that falls out of solution is called precipitate

5 0

4 years ago

Read 2 more answers

. The Henry's law constant for helium gas in water at 30 ∘C is 3.7×10−4M/atm; the constant for N2 at 30 ∘C is 6.0×10−4M/atm. a.

ludmilkaskok [199]

Explanation:

1) Henry's law states that the amount of gas dissolved or molar solubility of gas is directly proportional to the partial pressure of the liquid.

To calculate the molar solubility, we use the equation given by Henry's law, which is:

$M_{g}=K_H\times p_{g}$

where,

$K_H$ = Henry's constant

$p_{He}$ = partial pressure of gas

a) $K_H=3.7\times 10^{-4} M/atm$

$p_{He}=2.1 atm$

Putting values in above equation, we get:

$M_{He}=3.7\times 10^{-4} M/atm\times 2.1 atm = 7.77\times 10^{-4} M$

The solubility of helium gas is $7.77\times 10^{-4} M$

b) $K_H=6.0\times 10^{-4} M/atm$

$p_{N_2}=2.1 atm$

Putting values in above equation, we get:

$M_{He}=6.0\times 10^{-4} M/atm\times 2.1 atm = 1.26\times 10^{-3} M$

The solubility of nitrogen gas is $1.26\times 10^{-3} M$

2)

a) Mass of solute or methanol , m= 14.7 g

Mass of solvent or water , m'= 186 g

Mass of the solution = M = m + m' = 14.7 g + 186 g = 200.7 g

$w/w\%=\frac{\text{Mass of solute}}{\text{Mass of solution}}\times 100$

$=\frac{14.7 g}{200.7 g}\times 100=7.32\%$

The mass percent of methanol is 7.32%.

b) Molality is defined as moles of solute per kilograms of solvent.

$m=\frac{\text{Moles of solute}}{\text{Mass of solvent in kg}}$

Moles of methanol = $\frac{14.7 g}{32 g/mol}=0.4594 mol$

Mass of solvent = 186 g = 0.186 kg

$m=\frac{0.4594 mol}{0.186 kg}=2.4610 mol/kg$

The molality of methanol is 2.4610 mol/kg.

4 0

3 years ago

4.87 x 103 + 1.092 x 107 =

PolarNik [594]

618.454. I just did the equation in a character oops.

6 0

3 years ago

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What is the oxidation number for Al in Al₂O₃?

sesenic [268]

Oxygen in oxides has oxidation number -2.

<span>Al⁺³₂O⁻²₃

+3*2 -2*3=0</span>

4 0

4 years ago

PLEASE HELP QUICKLY!!

andreyandreev [35.5K]

THAT IS TOUGH GIRL HOPE YOU FIND THE ANSWER

4 0

3 years ago