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3 years ago

How many moles of oxygen are in 5.6 moles of al(oh)3?

Chemistry

1 answer:

Mashcka [7]3 years ago

7 0

5.6 Al(OH)3
5.6 Al, 16.8 O, 16.8 H

16.8 mols of oxegyn in 5.6 mols of Al(OH)3

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How many mole of oxygen are present in 3 mole of sodium sulfate, Na2SO4

GarryVolchara [31]

N(Na₂SO₄)=3 mol

n(O)=4n(Na₂SO₄)

n(O)=4*3=12 mol

3 0

4 years ago

The specific heat of copper metal is 0. 385 J/(g °C). How much energy must be added to a 35. 0-gram sample of copper to change t

Rus_ich [418]

The amount of heat required for changing the temperature of copper has been 606 J. Thus, option B is correct.

Specific heat has been defined as the amount of heat required to raise the temperature of 1 gram of substance by 1 degree Celsius.

The heat required to raise the temperature has been expressed as:

$\rm Heat=mass\;\times\;specific\;heat\;\times\;Change\;in\;temperature$

<h3>Computation for the heat energy required</h3>

The given specific heat of copper has been $\rm 0.385\;J/g^\circ C$

The mass of copper has been, $\rm 35\;g$

The initial temperature of copper has been, $\rm 20^\circ C$

The final temperature of copper has been, $\rm 65^\circ C$

The change in temperature has been, $\Delta T$

$\Delta T=\text{Final\;temperature-Initial\;temperature}\\\Delta T =65^\circ \text C-20^\circ \text C\\\Delta T=45^\circ \text C$

Substituting the values for the heat required as:

$\rm Heat=35\;g\;\times\;0.385\;J/g^\circ C\;\times\;45^\circ C\\Heat=606\;J$

The amount of heat required for changing the temperature of copper has been 606 J. Thus, option B is correct.

Learn more about specific heat, here:

brainly.com/question/2094845

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2 years ago

Which type of volcano forms when eruptions contain mostly dush ashes and cinders?

Alisiya [41]

Stratovolcanoes, or composite volcanoes, mostly erupt dust, ash, and cinders.

6 0

3 years ago

Balance the following equations

Shtirlitz [24]

2K + Cl₂ ⇒ 2KCl

2Ca + O₂ ⇒ 2CaO

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4 years ago

When the equation Al(OH)₃ + H₂SO₄ ---> Al₂(SO₄)₃ + H₂O is balanced, the sum of the balancing coefficients is

denis-greek [22]

Answer:

The answer to your question is the letter D. 12

Explanation:

Unbalanced chemical reaction

Al(OH)₃ + H₂SO₄ ⇒ Al₂(SO₄)₃ + H₂O

Reactants Elements Products

1 Al 2

1 S 3

5 H 2

7 O 13

Balanced chemical reaction

2Al(OH)₃ + 3H₂SO₄ ⇒ Al₂(SO₄)₃ + 6H₂O

Reactants Elements Products

2 Al 2

3 S 3

12 H 12

18 O 18

Sum up the coefficients

Result = 2 + 3 + 1 + 6

= 12

5 0

4 years ago