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4 years ago

Which satement describes a physiscal property of matter? check all the apply.

Chemistry

1 answer:

Ymorist [56]4 years ago

8 0

A cumulus cloud is puffy and white.

Vinegar has a sour odour.

Water boils at 100 °C.

Each side of a cube measures 10 cm.

The above properties are all physical properties because you can observe them without changing the composition of the substances.

A mixture of baking soda and vinegar produces gas is incorrect because the baking soda changes into carbon dioxide and other substances.

Iron rusts when exposed to water is incorrect because the iron changes into rust.

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Scientists often have to deal with numbers that are either very large or very small. For example, the radius of the Sun is appro

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6.96 * 10^5 km for sun radius

0.00019 mm for bacterial cells

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4 years ago

Read 2 more answers

Select which of the following are used to determine the age of the Earth. Select 3.

saveliy_v [14]

Meteorites discovered on earth

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3 years ago

Which bag held the most vibrant beads?

Zolol [24]

Answer:

The bag with no sunscreen held the most vibrant beads.

Explanation:

SPF is the Sun Protection Factor. It indicates how long a person can stay out in the sun before his skin start burning. It is a factor that is multiplied by 15 minutes. SPF 30 means 30 times 15 = 450 minutes. SPF 70 means 70 times 15 = 1,050 minutes.

Thus, the bag covered in SPF 30 sunscreen will raise its temperature faster than the bag covered in SPF 70 sunscreen. And the bag with no sunscreen will raise its temperature faster than the other two.

The higher the temperature the more vibrant the particles that consititute the substances, thus, you conclude that the bag that held the most vibrant beads is the bag with no sunscreen.

Remember that the temperature is a measure of the kinetic energy:. The relation is: the higher the temperature the higher the kinetic energy.

Therefore, the more the particles vibrate, the higher the kinetic energy and the higher the temperature.

3 0

3 years ago

When the following equation is balanced, the coefficient of Al is ___ Al (s) + H20 (1) - Al(OH)3 (s) + H2 (g) A) 4 B) 1 C) 5 D)

Salsk061 [2.6K]

Answer: The correct answer is Option E.

Explanation:

Every balanced chemical equation follows law of conservation of mass.

This law states that mass can neither be created nor be destroyed but it can only be transformed from one form to another form.

This also means that total mass on the reactant side must be equal to the total mass on the product side.

The balanced chemical equation for the reaction of aluminium and water follows:

$2Al(s)+6H_2O(l)\rightarrow 2Al(OH)_3(s)+3H_2(g)$

The coefficient of Aluminium is 2.

Hence, the correct answer is Option E.

7 0

3 years ago

Can you please solve this question???

Mandarinka [93]

Answer:

1 is Argon

2 is Kalium

3 is Calcium

ii)

Y belongs to alkaline metals

Z belongs to alkaline earth metals

iii)

Kalium (Y) is alkaline metal

8 0

3 years ago