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timama [110]
2 years ago
13

Which best explains why a firework being ignited is an example of an exothermic reaction and not an endothermic

Chemistry
1 answer:
snow_lady [41]2 years ago
4 0
The fireworks give off heat
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In this image, which fundamental interaction is responsible for attracting the electron?
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a.

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Electrical resistance is measured with ______________
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4 years ago
Which rock types tend to weather into rounded shapes
Sunny_sXe [5.5K]

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4 years ago
Applying the rules of significant figures, which of the following would be the correct value for the density of a substance whic
lilavasa [31]

16 g/ml

<h3>Further explanation</h3>

Given

mass = 32.40 g

volume = 2.0mL

Required

Density

Solution

Density is a quantity derived from the mass and volume  

Density is the ratio of mass per unit volume  

Density formula:  

\large {\boxed {\bold {\rho ~ = ~ \frac {m} {V}}}}

ρ = density  

m = mass  

v = volume  

Input the value :

ρ = 32.40 g / 2.0 ml

ρ = 16.2 g/ml

Rules for division: The least number of significant figures in the problem determines the number of significant figures in the answer.

32.40 = 4 sig.fig

2.0 = 2 sig fig

The answer must be 2 sig fig

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6 0
3 years ago
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