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kondaur [170]
3 years ago
14

What is likely to happen if we can't control our experiment properly? A. Our hypothesis will have to be changed. B. We will need

to do other experiments and collect more data. C. Our hypothesis will be well-supported by the data we collect. D. We will have to make more inferences instead of collecting data.
Chemistry
2 answers:
REY [17]3 years ago
4 0
The answer to your question
is b 
katovenus [111]3 years ago
4 0

Answer:

The answer is <u><em>letter D</em></u>

Explanation:

It is the only one that makes sense, i dont have a proper explanation unfortunately, its just guts. sorry, this probably wont help, but i tried agaga

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Single replacement reaction

Explanation:

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Copper has a specific heat of 0.385 J/gºC.
Anna71 [15]

Answer:

The final temperature is 348.024°C.

Explanation:

Given data:

Specific heat of copper = 0.385 j/g.°C

Energy absorbed = 7.67 Kj (7.67×1000 = 7670 j)

Mass of copper = 62.0 g

Initial temperature T1 = 26.7°C

Final temperature T2 = ?

Solution:

Specific heat capacity:

It is the amount of heat required to raise the temperature of one gram of substance by one degree.

Formula:

Q = m.c. ΔT

Q = amount of heat absorbed or released

m = mass of given substance

c = specific heat capacity of substance

ΔT = change in temperature

ΔT = T2 - T1

Q = m.c. ΔT

7670 J = 62.0 g × 0.385  j/g °C ×( T2- 26.7 °C )

7670 J = 23.87 j.°C ×( T2- 26.7 °C )

7670 J / 23.87 j/°C = T2- 26.7 °C

T2- 26.7 °C = 321.324°C

T2 = 321.324°C + 26.7 °C

T2 = 348.024°C

The final temperature is 348.024°C.

6 0
3 years ago
If 4.80 mol Ca mixed with 2 mol N2, which is the limiting reactant? 3Ca (s) + N2 (g) Ca3N2 (s)
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The answer is option B, that is, it has two oxygen atoms.

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