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3 years ago

If one pound is the same as 454 grams, then convert the mass of 78 grams to pounds.

Chemistry

1 answer:

LiRa [457]3 years ago

4 0

Answer:

0.17 lb

Explanation:

78 g * (1 lb/454 g)=0.17 lb

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A gas occupies 12.3 liters at a temperature of 40 K. What is the volume when the temperture is increased to 60 K?

Arte-miy333 [17]

Answer:

The answer to your question is V2 = 18.45 l

Explanation:

Data

Volume 1 = V1 = 12.3 l

Temperature 1 = T1 = 40°K

Volume 2 = V2 = ?

Temperature 2 = T2 = 60°K

Process

To solve this problem use Charles' law

V1/T1 = V2/T2

-Solve for V2

V2 = V1T2 / T1

-Substitution

V2 = (12.3 x 60) / 40

-Simplification

V2 = 738 / 40

-Result

V2 = 18.45 l

5 0

3 years ago

If the lead concentration in water is 1 ppm, then we should be able to recover 1 mg of lead from _____ L of water.

Aliun [14]

Answer:

1 L

Explanation:

ppm means parts per million. Generally the relationship between mass and litre is given as;

1 ppm = 1 mg/L

This means that 1 ppm is equivalent to 1 mg of a substance dissolved in 1 L of water.

3 0

4 years ago

A reversible reaction has a forward rate constant of 0.412 mol/L/s and a reverse reaction rate constant of 0.827 mol/L/s. What's

andrey2020 [161]

Answer: 0.498

Explanation:

Given the following :

Forward rate constant (Kf) = 0.412 mol/L/s

Reverse rate constant (Kr) = 0.827 mol/L/s

The ratio of the rate constant for the forward reaction and the rate constant for the reverse reaction produces the equilibrium constant.

Therefore,

Keq = (forward rate constant (Kf) / Reverse rate constant)

Keq = 0.412mol/L/s / 0.827mol/L/s

Keq = 0.498

7 0

4 years ago

Need help with this

choli [55]

Answer:

H20is water andN20is nitrogen 4 oxide

6 0

3 years ago

Consider the reaction when aqueous solutions of magnesium sulfate and chromium(iii) acetate are combined. (use the solubility ru

WARRIOR [948]

Answer : When we mix the aqueous solutions of magnesium sulfate with chromium acetate we get the following reaction :-

$MgSO _{4} + Cr (C _{2}H _{3}O _{2}) _{2} ----\ \textgreater \ CrSO _{4} + Mg(C _{2}H _{3}O _{2}) _{2}$

It is an example of a displacement reaction that takes place. According to the OWL solubility preparation rules all the reactants are soluble and hence the reaction occurs.

The net ionic equation of the reaction is :-

$SO _{4} ^{-2} _{(aq.)} + Cr^{+2} _{(aq.)} ----\ \textgreater \ CrSO_{4}_{(s)}$

7 0

3 years ago