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3 years ago

In an exothermic reaction, chemical energy is converted to 1.thermal 2. mechanical

Chemistry

2 answers:

Black_prince [1.1K]3 years ago

6 0

Answer:

thermal, I'm not 100% sure though.

tigry1 [53]3 years ago

6 0

Thermal. As the definition of a exothermic relation is any reaction that release heat. Remember that it’s in the word exo-“thermic”

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The answer would be D

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4 years ago

the lenght of the rug is 46.3 in. qnd the width is 26.3in. what is the lenght of this rug measured in centimeters

telo118 [61]

The length of the rug in cm will be
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4 years ago

kilograms represented by the mass defect for thorium -234=3.09x 10-27 kg what is the nuclear binding energy for thorium -234

Dafna1 [17]

Mass defect and binding energy are related as

ΔE = Δmc^2

Where

ΔE = binding energy

Δm = mass defect

c = speed of light

given

mass defect = 3.09x 10-27 kg

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ΔE = 3.09x 10-27 kg (3 X 10^8 m /s)^2 = 2.781 X 10^-10 J / Kg

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3 years ago

Read 2 more answers

Which of the following terms measures the amount of matter in an object?<br> Weight or mass

Oksanka [162]

Mass measures the amount of matter in an object

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4 years ago

The combustion of propane may be described by the chemical equation C 3 H 8 ( g ) + 5 O 2 ( g ) ⟶ 3 CO 2 ( g ) + 4 H 2 O ( g ) C

Kipish [7]

Answer: 72 grams of $O_2(g)$ are needed to completely burn 19.7 g $C_3H_8(g)$

Explanation:

According to avogadro's law, 1 mole of every substance weighs equal to molecular mass and contains avogadro's number $6.023\times 10^{23}$ of particles.

To calculate the number of moles, we use the equation:

$\text{Number of moles}=\frac{\text{Given mass}}{\text{Molar mass}}$

Putting in the values we get:

$\text{Number of moles}=\frac{19.7g}{44g/mol}=0.45moles$

$C_3H_8(g)+5O_2(g)\rightarrow 3CO_2(g)+4H_2O(g)$

According to stoichiometry:

1 mole of $C_3H_8$ requires 5 moles of oxygen

0.45 moles of $C_3H_8$ require= $\frac{5}{1}\times 0.45=2.25$ moles of oxygen

Mass of $O_2=moles\times {\text {Molar mass}}=2.25\times 32=72g$

72 grams of $O_2(g)$ are needed to completely burn 19.7 g $C_3H_8(g)$

7 0

3 years ago