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suter [353]
3 years ago
13

PLEASE HELP ITS RLLY HARD

Chemistry
2 answers:
LiRa [457]3 years ago
7 0

Answer:

Solvent

Explanation:

it dissolves soluble substances

kykrilka [37]3 years ago
6 0

Solvent is used to dissolve the solute in the solution

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Substance tha have excess hydroxide ions (OH-) are
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Substances that posses an excess it greater amount of hydroxide ions are considered basic, or alkali like in solution. They would thus showcase properties of a basic substance.
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3 years ago
In calculating the relationship between the amount of heat added to a substance and the corresponding temperature change, the sp
otez555 [7]

Answer:

C.

Explanation:

Specific heat capacity of a substance can be defined as the amount of heat a gram of the substance must lose or absorb in order to change its temperature by a degree Celsius. It is measured in Joules per kilogram per degree Celsius (J/kg°C).

Generally, the specific heat capacity of water is 4.182J/kg°C and is the highest among liquids.

Heat capacity or quantity of heat is given by the formula;

Q = mcdt

Where;

Q represents the heat capacity or quantity of heat.

m represents the mass of an object.

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dt represents the change in temperature.

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3 years ago
Which of the following best describes an object that is accelerating? *
Flauer [41]

Answer:

a soccer ball travels at 3m/s

7 0
3 years ago
What is the halflife of a radioisotope if a 20-g sample becomes 10g after 16 hours
ohaa [14]

Answer:

T½ = 16hours

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Final mass (N) = 10g

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In(N/No) = -λt

In(10/20) = -(λ * 16)

In(0.5) = -16λ

-0.693 = -16λ

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λ = 0.0433

Note : λ is known as the disintegration constant

T½ = In2 / λ

T½ = 0.693 / 0.0433

T½ = 16hours

The half-life of the sample is 16hours

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Why is a mole of oxygen and a mole of oxygen gas a different molar mass?
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A mole<span> is a unit of measurement. One </span>mole<span> equals 6 x 10^23 atoms/molecules/whatever. So take the </span>molecular mass<span> of elemental </span>oxygen<span> - 16 grams per </span>mole<span>. ... 1 </span>mole<span> elemental </span>oxygen<span>(16 grams O/1 </span>mole<span>) = 16 grams.</span>
3 0
4 years ago
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