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Vesna [10]
3 years ago
11

Need help asap!!!

Chemistry
1 answer:
kogti [31]3 years ago
8 0

Answer:

A

Explanation:

Energy gets the particles moving so it will change form

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Which type of radioactive decay does not cause change in the atomic mass of the product
Lady bird [3.3K]

Answer:

Gamma decay/radiation

Explanation:

Gamma radiation has no mass and no electrical charge which means no change in the atomic number or mass number when gamma rays are emitted.

4 0
3 years ago
how many moles of a nonvolatile, nonelectrolyte solute are required to lower the freezing point of 1000 grams of water by 5.58
Ivan

Answer:

Explanation:

Using freezing point depression formula,

ΔTemp.f = Kf * b * i

Where,

ΔTemp.f = temp.f(pure solvent) - temp.f(solution)

b = molality

i = van't Hoff factor

Kf = cryoscopic constant

= 1.86°C/m for water

= (0 - (-5.58))/1.86

= 3.00 mol/kg

Assume 1 kg of water(solvent)

= (3.00 x 1)

= 3.00 mol.

5 0
3 years ago
All energy originates from the _______.
Phantasy [73]

Answer:

sun

Explanation:

because all plants use energy from the sun to make food and grow

7 0
3 years ago
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What is the effect of high activation energy on a chemical reaction?
alex41 [277]
<h3><u>Answer;</u></h3>

It makes the reaction harder to start

<h3><u>Explanation</u>;</h3>
  • <em><u>Activation energy is minimum amount of energy that is required for a reaction to start. Activation energy determines the rate of a chemical reaction such that the higher the activation energy, the lower the rate of chemical reaction and vice versa.</u></em>
  • The source of activation energy needed to push chemical reactions forward is obtained from the surroundings. Catalyst speed up chemical reaction by lowering the activation energy. Therefore, catalysis is the increase in the rate of a chemical reaction by lowering its activation energy.
4 0
3 years ago
Which statement about atoms and molecules is
Pavel [41]

Elements always exist as pair of atoms called molecules .

Explanation:-

  • The material which has only one types of similar atoms called element .
  • Ex:-Sodium,Carbon etc
8 0
3 years ago
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