2 years ago

A mixture of uneven distribution and easy separation is called_____. homogeneous heterogeneous a solution a pure substance

Chemistry

2 answers:

dem82 [27]2 years ago

6 0

The correct answer is heterogeneous.

kramer2 years ago

5 0

Answer:

heterogeneous

Explanation:

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When adding the measurements 42.1014 g + 190.5 g, the answer has ___ significant figures.

andrezito [222]

Answer: The answer has 7 significant figures

Explanation:

The addition of 190.5 and 42.1014 will give 232.6014. Counting the digits will give 7 significant figures.

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3 years ago

How many moles of magnesium is 1.25 x 1023 atoms of magnesium?

andrew-mc [135]

The moles of magnesium in 1.25 x 1023 are 20.8 mol.

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In a cell, what is the function of the Cell Membrane?

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3 years ago

A slice of pizza has 500 kcal. If we could burn the pizza and use all the heat to warm a 50-L container of cold water, what woul

gayaneshka [121]

Answer:

10°C

Explanation:

Heat gain by water = Heat lost by the slice of pizza

Thus,

$m_{water}\times C_{water}\times \Delta T=Q$

<u>For water: </u>

Volume = 50.0 L

Density of water= 1 kg/L

So, mass of the water:

$Mass\ of\ water=Density \times {Volume\ of\ water}$

$Mass\ of\ water=1 kg/L \times {50.0\ L}$

Mass of water = 50 kg

Specific heat of water = 1 kcal/kg°C

ΔT = ?

For slice of pizza:

Q = 500 kcal

So,

$50\times 1\times \Delta T=500$

ΔT = 10°C

Increase in temperature = 10°C

3 0

2 years ago

What is the pH when the hydrogen ion concentration is 1 x 10-3 M?

Fynjy0 [20]

Answer:

e. 3

Explanation:

In order to solve this problem we need to keep in mind the definition of pH:

pH = -log[H⁺]

As stated by the problem, the hydrogen ion concentration, [H⁺], is 1x10⁻³ M.

As all required information is available, we now can <u>calculate the pH</u>:

pH = -log(1x10⁻³ M)

pH = 3

The correct option is thus e.

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2 years ago