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3 years ago

8

Laws of conservation of mass/pleases help

1 answer:

umka2103 [35]3 years ago

5 0

Answer:

27g + 33g = 60g

18g + 24g = 42g

Explanation:

The law of conservation of mass states that no matter can be destroyed or created. Because of this, you are simply making both sides equal.

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Why do scientific theories change?

Sergio039 [100]

Scientific theories change because<span> </span>theories<span> may be modified or overturned as new evidence and perspective emerges. ... The process of </span>theory change<span> may take time and involve controversy, but eventually the </span>scientific<span> explanation that is more accurate will be accepted. Hoped you get it!</span>

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3 years ago

Read 2 more answers

A 1.800-g sample of solid phenol (C6H5OH(s)) was burned in a bomb calorimeter whose total heat capacity is 11.66 kJ/?C. The temp

vichka [17]

Answer:

The balanced chemical equation:

$C_6H_5OH(s)+7O_2(g)\rightarrow 6CO_2(g)+3H_2O(g)$

Heat of combustion per gram of phenol is 32.454 kJ/g

Heat of combustion per gram of phenol is 3,050 kJ/mol

Explanation:

$C_6H_5OH(s)+7O_2(g)\rightarrow 6CO_2(g)+3H_2O(g)$

Heat capacity of calorimeter = C = 11.66 kJ/°C

Initial temperature of the calorimeter = $T_1= 21.36^oC$

Final temperature of the calorimeter = $T_2= 26.37^oC$

Heat absorbed by calorimeter = Q

$Q=C\times \Delta T$

Heat released during reaction = Q'

Q' = -Q ( law of conservation of energy)

Energy released on combustion of 1.800 grams of phenol = Q' = -(58.4166 kJ)

Heat of combustion per gram of phenol:

$\frac{Q'}{1.800 g}=\frac{-58.4166 kJ}{1.800 g}=32.454 kJ/g$

Molar mass of phenol = 94 g/mol

Heat of combustion per gram of phenol:

$\frac{Q'}{\frac{1.800 g}{94 g/mol}}=\frac{-58.4166 kJ\times 94 g/mol}{1.800 g}=3,050 kJ/mol$

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3 years ago

An equation thats shows how an objects acceleration relates to its mass

Nady [450]

Answer:

Newton's second law of motion

F = ma

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3 years ago

What are the main reactants and products in a neutralization reaction?

blagie [28]

The reactants in the neutralization reaction are an acid and a base while the products are a salt and water.

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3 years ago

As Matter Changes States of matter does chemical composition stay the same or not

geniusboy [140]

Whether water is frozen, in a gaseous state, or is a liquid, it is still H2O. So the chemical composition does stay the same.

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4 years ago