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3 years ago

How many kilowatt hours does it take to lift an apple that weighs 100g 1 meter.(use 9.8 kg

Chemistry

1 answer:

kati45 [8]3 years ago

3 0

Answer:

The answer to your question is Power = 0.98 W or 9.8 x 10⁻⁴ kW

Explanation:

Data

Power = ?

mass = 100 g = 0.1 kg

distance = 1 m

gravity = 9.8 m/s²

Formula

Power = Work / time

Process

1.- Calculate the Work

Work = Force x distance

Force = mass x gravity

Work = mass x gravity x distance

Work = (0.1 kg)(9,8)(1)

Work = 0.98 J

2.- Calculate the power

Power = 0.98 J / 1 h

Power = 0.98 W or 9.8 x 10⁻⁴ kW

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soldi70 [24.7K]

Answer:

c) 0.080 M Al₂(SO₄)₃

Explanation:

Ion [SO₄²⁻] concentration of each solution is:

a) 0.075 M H₂SO₄: [SO₄²⁻] = 0.075M. Because 1 mole of H₂SO₄ contains 1 mole of SO₄²⁻

b) 0.15 M Na₂SO₄: [SO₄²⁻] = 0.15M. Also, 1 mole of Na₂SO₄ contains 1 mole of SO₄²⁻

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2 years ago

Answer A B C and D please for my chemistry hw

r-ruslan [8.4K]

Answer: The equations are provided below.

Explanation:

Skeleton equations are defined as the equations which simply indicate the molecules that are involved in a chemical reaction. These equations are unbalanced equations.

Balanced equations are defined as the chemical equation in which number of individual atoms on the reactant side must be equal to the number of individual atoms on the product side.

For A:

Water decomposes in the direct current to form hydrogen and oxygen.

Skeleton Equation: $H_2O(l)\rightarrow H_2(g)+O_2(g)$

Balanced Equation: $2H_2O(l)\rightarrow 2H_2(g)+O_2(g)$

For B:

Mercury (II) oxide decomposes in heat to form mercury, oxygen.

Skeleton Equation: $HgO(s)\rightarrow Hg+O_2$

Balanced Equation: $2HgO(s)\rightarrow 2Hg+O_2$

For C:

Calcium carbonate when heated forms calcium oxide and carbon dioxide.

Skeleton Equation: $CaCO_3(s)\rightarrow CaO(s)+CO_2(g)$

Balanced Equation: $CaCO_3(s)\rightarrow CaO(s)+CO_2(g)$

For D:

Group 2 hydroxides, when heated forms oxide and water vapor.

Skeleton Equation: $Ca(OH)_2\rightarrow CaO+H_2O$

Balanced Equation: $Ca(OH)_2\rightarrow CaO+H_2O$

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2 years ago

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Natali [406]

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2 years ago

A balloon inflated in a room at 27 degrees celsius has a volume of 8.00 L.the balloon is then heated to a temperature of 78 degr

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PV = nRT
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As,
Gas constant R and Pressures are constant, so, Ideal gas equation can be written as,
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Solving for V₂,
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2 years ago

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bagirrra123 [75]

Answer:

electronegativity

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Oxygen will be most reactive

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As oxygen need only two electrons to complete its octet.

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2 years ago