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3 years ago

The MSDS for benzene indicates that it is a clear liquid that has a substantial vapor pressure. It has a health rating of

Chemistry

2 answers:

MrRissso [65]3 years ago

6 0

Answer:

Benzene must be kept away from flames.

Explanation:

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vivado [14]3 years ago

4 0

Answer:

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Solution a has a ph of 6. Solution b has a ph of 8. What is true about these solutions?.

Stella [2.4K]

Answer:Solution A has 10 times more hydrogen ions than solution B.

8 0

3 years ago

If you could answer these 2 questions I will give brainliest if you get it right please and thank you!!!

EleoNora [17]

Answer:

1. D.) Structural Data

2. C.) Overproduction

Explanation:

1. Structural Data was used to determine the similarities between the two species.

2. In biological terms, overproduction means that a generation had more offspring than can be supported by the environment. In this case, its a stronger hatchling beating out the waker hatchlings.

8 0

4 years ago

It takes a slug 20 minutes to travel from the grass to the trash can, a trip of 15 meters. How far could the slug travel in 60 m

ruslelena [56]

Answer:

45 meters

Explanation:

If it takes the slug 20 minutes to travel 15 meters, you multiply the 15 by three to get the distance for 60 minutes.

4 0

3 years ago

Isotopes of the same element have different

Nana76 [90]

Isotopes of the same element have different mass numbers.

C. mass numbers.

one mole of copper has 6.02 x 10²³ atoms

C. 6.02 * 10²³ atoms.

5 0

3 years ago

What is the delta H when 72.0 grams H2O condenses at 100.00C?

algol [13]

<u>Answer:</u> The value of $\Delta H$ is -163 kJZ

<u>Explanation:</u>

The number of moles is defined as the ratio of the mass of a substance to its molar mass. The equation used is:

$\text{Number of moles}=\frac{\text{Given mass}}{\text{Molar mass}}$ ......(1)

We are given:

Given mass of water = 72.0 g

Molar mass of water = 18 g/mol

Putting values in equation 1, we get:

$\text{Moles of water}=\frac{72.0g}{18g/mol}\\\\\text{Moles of water}=4mol$

Calculating the heat released for the condensation process:

$\Delta H=n\times \Delta H_{(vap)}$ ......(2)

where,

$\Delta H$ = amount of heat released

n = number of moles of water = 4 moles

$\Delta H_{(vap)}$ = specific heat of vaporization = -40.7 kJ/mol

Negative sign represents the amount of heat released.

Putting values in equation 2:

$\Delta H=4mol\times (-40.7kJ/mol)=-163kJ$

Hence, the value of $\Delta H$ is -163 kJ

4 0

3 years ago