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3 years ago

A piece of asphalt has a volume of 5.0 cm3 and a mass of 7.5 g. What is the density of the asphalt?

Chemistry

1 answer:

strojnjashka [21]3 years ago

6 0

Density = mass / volume
Density = 7.5 g / 5.0 cm3
Density = 1.5 g/cm3

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An athlete can run 4 m/s. How far can she run in 3 minutes?

shutvik [7]

Answer:

720

Explanation:

4 m/s

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3 minutes

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180 seconds

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3 years ago

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3 years ago

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3 years ago

A sample of water vapor has a volume of 3.15 L, a pressure of 2.40 atm, and a temperature of 325 K. What is the new temperature,

lara31 [8.8K]

Answer:

The answer to your question is: T2 = 235.44 °K

Explanation:

Data

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P1 = 2.40 atm P2 = 1.97 atm

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Formula

$\frac{P1V1}{T1} = \frac{P2V2}{T2}$

Process

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4 0

3 years ago

CH4 (g) yields C(g) + 4H (g) (reaction for expansion)

anyanavicka [17]

Answer:

Here's what I find.

Explanation:

$\rm CH$_{4}$(g) $\, \rightleftharpoons \,$ C(g) + 4H(g)$

$\text{Same} =\begin{cases}1. & \text{The number of atoms of each element}\\2. & \text{The state of the methane molecules}\\4. &\text{The state of the carbon atoms}\\\end{cases}$

$\text{Different} =\begin{cases}3. & \text{The enthalpy change of the reaction}\\\end{cases}$

The sign of ΔH changes when you reverse the reaction.

5 0

3 years ago

Read 2 more answers