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4 years ago

A phase change is an example of a

Chemistry

1 answer:

Finger [1]4 years ago

5 0

Answer:

Physical property

Explanation:

There are two types of properties that can occur in a reaction viz: physical nd chemical. Physical property are those ones have do not change the chemical identity of the substance involved as opposed to chemical properties in which the chemical composition of the substances are changed.

Physical properties include signs such as change of phase i.e. solid to gas, melting and boiling points, colour etc.

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What is the valency of hydroxide radical?

solniwko [45]

Answer:

Valency Radical Ion

Monovalent [1] Hydroxide OH1-

Nitrite NO21-

Nitrate NO31-

Bicarbonate [Hydrogen carbonate] HCO3

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3 years ago

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How many moles are there in 3.9 grams of potassium

polet [3.4K]

Answer:0.025576559594663 mole.

Explanation:

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3 years ago

How many grams of aluminum chloride can be produced from 7.32g of ammonium perchlorate?

Alla [95]

Answer:

2.77g of $AlCl_{3}$ can be produced.

Explanation:

Use stoichiometry.

Balanced equation: $3Al + 3NH_{4} ClO_{4}$ ⇒ $Al_{2} O_{3} + AlCl_{3} +3NO + 6H_{2} O$

$NH_{4} ClO_{4} : AlCl_{3}$

3 : 1 ** $n=\frac{m}{M}$

0.0623** : $x$ $n=\frac{7.32}{117.49}$ = 0.0623

$3x=0.0623\\x=0.020767$

$n=\frac{m}{M}$

$m=nM$

m= (0.020767)(133.34)

m= 2.77g

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2 years ago

Which statement about a system at equilibrium is true?(1) The forward reaction rate is less than the reverse reaction rate.(2) T

Stells [14]

(3) the forward reaction rate is equal to the reverse reaction rate
hope this helps!

4 0

3 years ago

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What's the chemistry?

Artyom0805 [142]

Answer:

Chemistry is another word for science just higher level.the branch of science that deals with the identification of the substances of which matter is composed; the investigation of their properties and the ways in which they interact, combine, and change; and the use of these processes to form new substances.

Explanation:

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3 years ago