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Nata [24]
3 years ago
9

A student measures the time it takes for two reactions to be completed.

Chemistry
2 answers:
dexar [7]3 years ago
6 0

Answer:

C. The rate of reaction B is lower

Studentka2010 [4]3 years ago
5 0

Answer:

c

Explanation:

because the left side of reactant is take more time to make a product than the first

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NEED HELP <br> WILL MARK DOWN BRAINLIEST
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6 0
3 years ago
A volume of 125 mL of H2O is initially at room temperature (22.00 ∘C). A chilled steel rod at 2.00 ∘C is placed in the water. If
inn [45]

Answer:

m_{steel}=54.47gSteel

Explanation:

Hello,

In this case, one considers that the heat lost by the water is gained by the steel rod:

\Delta H_{water}=-\Delta H_{steel}

That in terms of masses, heat capacities and temperatures is:

m_{water}Cp_{water}(T_F-T_{water})=-m_{steel}Cp_{steel}(T_F-T_{steel})

Thus, solving for the mass of the steel rod, we obtain:

m_{steel}=\frac{m_{water}Cp_{water}(T_F-T_{water})}{-Cp_{steel}(T_F-T_{steel})} \\\\m_{steel}=\frac{125mL*\frac{1g}{1mL}*4.18\frac{J}{g^oC} (22.00^oC-21.10^oC)}{-0.452\frac{J}{g^oC}*(2.00^oC-21.10^oC)} \\\\m_{steel}=54.47gSteel

Best regards.

6 0
4 years ago
Decide which element probably forms a compound with chlorine that has a chemical formula most and least similar to the chemical
valentinak56 [21]

Answer:

phosphorus - least similar to barium

beryllium - most similar to barium

Explanation:

The formula of the chloride formed between barium and chlorine is BaCl2.

Barium is a metallic element and has the valency of +2. Beryllium is also a group two metal with a valency of +2. Hence the compound formed between beryllium and chlorine is BeCl2

Phosphorus is a nonmetal and forms a completely different chloride from BaCl2. The chloride of phosphorus is PCl5 and PCl3. These are least similar to BaCl2

6 0
3 years ago
A gas has a pressure of 851mmHg at 330.K. What will its temperature be at 990.mmHg?
aev [14]

Answer:

383.90K

Explanation:

P1 = 851mmHg

T1 = 330K

T2 = ?

P2 = 990mmHg

To solve for P2, we have to use pressure law which states that the pressure of a fixed mass of fixed is directly proportional to its temperature provided that volume remains constant

Mathematically,

P = kT, k = P/T

P1 / T1 = P2 / T2 = P3 / T3 =.......=Pn / Tn

P1 / T1 = P2 / T2

T2 = (P2 × T1) / P1

T2 = (990 × 330) / 851

T2 = 383.90K

The final temperature of the gas is 383.90K

3 0
4 years ago
Suppose you were writing a summary of the article. Which of these will be most important to put in the summary?
NISA [10]
Which of what? I don’t see a picture.
5 0
3 years ago
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