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3 years ago

Write E in the blank if the material is heterogeneous or O if it is homogeneous.

Chemistry

1 answer:

Advocard [28]3 years ago

8 0

Answer/Explanation:

Wood: E

Freshly brewed black coffee: O

Water: O

Lucky Charms: E

Salt: O

Dirt: E

Sausage and mushroom pizza: E

Air: O

Milk: O

Gold: O

Any mixture that looks the same through the substance is homogenous. The different parts are unable to be visibly seen. (Any periodic element is homogenous)

Any mixture that can be easily determined a mix and cannot be evenly separated or dispersed is heterogenous.

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Water is a solute. solvent.

Finger [1]

Answer:

solvent

Explanation:

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Double and triple bonds form because

harina [27]

There are extra valence electron from each element in the compound, ergo, make another bond with the already existing one. resulting in an even stronger bond. eg CO2 has double bonds

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3 years ago

A sealed balloon occupies a volume of 250 mL at an unknown temperature. When the temperature is altered to 30 C, the balloon's v

Allushta [10]

Answer:

Initial temperature, T1 = 15°C

Explanation:

Given the following data;

Initial volume, V1 = 250 mL to Liters = 250/1000 = 0.25 L

Final temperature, T2 = 30°C

Final volume, V2 = 0.5 L

To find the initial temperature T1, we would use Charles' law.

Charles states that when the pressure of an ideal gas is kept constant, the volume of the gas is directly proportional to the absolute temperature of the gas.

Mathematically, Charles is given by;

$\frac {V}{T} = K$

$\frac{V1}{T1} = \frac{V2}{T2}$

Making T1 the subject of formula, we have;

$T_{1}= \frac{V_{1}}{V_{2}} * T_{2}$

Substituting into the formula, we have;

$T_{1}= \frac{0.25}{0.5} * 30$

$T_{1}= 0.5 * 30$

<em>Initial temperature, T1 = 15°C</em>

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3 years ago

Part A<br>What happens to the water molecules when<br>heat is added?

marusya05 [52]

Molecules in a gas have lots of energy and spread out even more than molecules in a liquid. Warm water has more energy than cold water, which means that molecules in warm water move faster than molecules in cold water

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Read 2 more answers

What is the momentum of a 1,700 kg car travelling in a straight line at 13 m/s?

Anna71 [15]

Answer:

Explanation:

We know that momentum is the product of mass and velocity so here

mass (m) = 1700 kg

velocity (v) = 13 m/s

So now

momentum = m * v

= 1700 * 13

= 22100 kg m/s

hope it helps :)

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3 years ago