2 years ago

Which energy changes would take place when a water is heated using a Bunsen burner?

1 answer:

4 0

Answer:

Heat energy causes water molecules to gain kinetic energy. More energy is gained by these molecules into potential energy to expand into atmosphere to form vapor molecules.

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VA 19.75-g sample was heated by 12.35 calories. The specific heat of the sample is 0.125 cal/g°C. What was the initial temperatu

SOVA2 [1]

Answer:

31.9 °C

Explanation:

The formula for the heat q absorbed by an object is

q = mCΔT where ΔT = (T₂ - T₁)

Data:

q = 12.35 cal

m = 19.75 g

C = 0.125 cal°C⁻¹g⁻¹

T₂ = 37.0 °C

Calculations

(a) Calculate ΔT

q = mCΔT

12.35 cal = 19.25 g × 0.125 cal°C⁻¹g⁻¹ × ΔT

12.35 = 2.406ΔT °C⁻¹

ΔT = 12.35/(2.406 °C⁻¹) = 5.13 °C

(b) Calculate T₂

ΔT = T₂ - T₁

T₁ = T₂ - ΔT = 37.0 °C - 5.13 °C = 31.9 °C

The original temperature was 31.9 °C.

6 0

2 years ago

Convert the scientific notation to a decimal number. Type the correct answer in the box. 4 × 10-5 cm = cm

MakcuM [25]

Answer:

$4 * 10^{-5}cm = 0.00004cm$

Explanation:

Given

$4 * 10^{-5}cm = [\ ]cm$

Required

Solve

Apply law of indices

$4 * \frac{1}{10^5}cm = [\ ]cm$

Evaluate 10^5

$4 * \frac{1}{100000}cm = [\ ]cm$

$4 * 0.00001cm = [\ ]cm$

$0.00004cm = [\ ]cm$

Hence:

$4 * 10^{-5}cm = 0.00004cm$

3 0

3 years ago

Which property determines an atom's ability to attract electrons shared in a chemical bond?

marta [7]

The property that determines an atom;s ability to attract electrons shared in a chemical bond is electronegativity. The correct answer is C.

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3 years ago

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Can anyone help me with this?

7nadin3 [17]

Answer:

Boo is a tan

Explanation:

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2 years ago

Which fossil fuel accounts for 95% of consumption for transportation?

Ilia_Sergeevich [38]

Answer:

oil

Explanation:

i hope this helps :)

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2 years ago