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Evgen [1.6K]
3 years ago
10

The decomposition of in solution in carbon tetrachloride is a first-order reaction: The rate constant at a given temperature is

found to be . If the initial concentration of is 0.200 M, what is its concentration after exactly 10 minutes have passed?
Chemistry
2 answers:
Elan Coil [88]3 years ago
6 0

Answer:

see below

Explanation:

The rate constant is missing in question, but use C(final) = C(initial)e^-kt = 0.200M(e^-k·10). Fill in k and compute => remaining concentration of reactant

Crazy boy [7]3 years ago
4 0

Answer:

C(initial)e^-kt = 0.200M(e^-k·10).

Explanation:

The rate constant is missing in question, but use C(final) = C(initial)e^-kt = 0.200M(e^-k·10).

Fill in k and compute => remaining concentration of reactant

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A balloon filled with 1.22 L of gas at 286 K is heated until the
TiliK225 [7]

Answer: 670K

Explanation:

Given that,

Original volume of gas V1 = 1.22 L

Original temperature T1 = 286 K

New volume V2 = 2.86 L

New temperature T2 = ?

Since volume and temperature are involved while pressure is constant, apply the formula for Charles law

V1/T1 = V2/T2

1.22 L/286 K = 2.86 L/ T2

Cross multiply

1.22 L x T2 = 286 K x 2.86 L

1.22T2 = 817.96

Divide both sides by 1.22

1.22T2/1.22 = 817.96/1.22

T2 = 670.459 K (Round to the nearest whole number as 670 K)

Thus, the temperature of the gas is 670 Kelvin

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3 years ago
Define significant figure. Discuss the importance of using the proper number of significant figures in measurements and calculat
anastassius [24]

Explanation:

Significant figure is the measure of how accurately something can be measured. It carries meaning contributing to its measurement resolution. It is important to use proper number of significant figures to get a precise measurement. For example, if we use a meter stick then measurements like 0.874 meters, or 0.900 meters, are good because they indicate that we can measure to the nearest millimeter. Whereas a measurement like 0.8 does not tell that a meter stick can measure to the nearest millimeter.

7 0
3 years ago
What would most likely happen if the moon was closer to Earth (take tides into consideration)?
Gekata [30.6K]

Answer:

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Explanation:

<em>Also...</em>

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3 0
3 years ago
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antiseptic1488 [7]

Answer: Matter cannot be created or destroyed

Explanation: Balanced equations are set equations we cannot change one element or compound in the equation without changing the entire equation. So balanced equation show the conservation of mass because while other substances may be formed from the synthesis or decomposition of compounds new elements are never introduced and are not created out of thin air    :)

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3 years ago
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What is the mass in grams of 358 mL of ethylene glycol?
frez [133]
The density of ethylene glycol is: D = 1.11 g/mL
D = m / V
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m = 397.38 g
Answer:
Mass is 397.38 g. 
6 0
3 years ago
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