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Kay [80]
3 years ago
13

HELP PLEASE!!!! 15 POINTS!!! HELP!!

Chemistry
2 answers:
Elis [28]3 years ago
6 0

Answer:

You want a chemical that absorbs energy because it needs to absorb heat energy and quickly cool the contents of the pack.

damaskus [11]3 years ago
6 0

Answer:

Absorb energy.

Explanation:

If you wanted to make a cold pack that absorbs heat (aka an endothermic reaction), then you'd want to use a chemical that absorbs energy. This would absorb the heat. Hope this helped :)

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1. What did Henri Becquerel discover about<br> radiation emitted from uranium salts?
Dmitriy789 [7]

Explanation:

When Henri Becquerel investigated the newly discovered X-rays in 1896, it led to studies of how uranium salts are affected by light. By accident, he discovered that uranium salts spontaneously emit a penetrating radiation that can be registered on a photographic plate.

6 0
2 years ago
The radius of a circle is 7.31. How should the circle area be reported?
Alona [7]

I'm not sure but it should be 7.31 times 2 times 3.14 or pi

7.31 x 2 x 3.14 = 45.9068

If you need to round to the nearest tenth it will be 45.9

If you need to round to the nearest hundredth it will be 45.91

7 0
3 years ago
If you serve 6 oz cups of soda how many servings can you pour from a 2 liter bottle? (32 fluid oz. = 1 qt. and 1 liter = 1.057 q
Otrada [13]

Answer:

do you want to know if the above answer is correct?

if yes its correct :)

6 0
3 years ago
TRY H Vele
Strike441 [17]
<h3>Answer:</h3>

Al- [Ne] 3s²3p¹

As- [Ar] 4s²3d¹⁰ 4p³

Explanation:

  • Electron configuration of an element shows the arrangement of electrons in the energy levels or orbitals in the atom.
  • Noble-gas configuration involves use of noble gases to write the configuration of other elements.
  • This is done by identifying the atomic number of the element and then identifying the noble gas that comes before that particular element on the periodic table.
  • For example:
  1. Aluminium: The atomic number of Al is 13. The noble gas before Aluminium is Neon which has 10 electrons. Therefore the remaining 3 electrons fills up the 3s and 3p sub orbitals.
  • Thus, the noble-gas configuration of Al is [Ne] 3s²3p¹

     2.  Arsenic, Atomic number is 33

  • Noble gas before Arsenic is Ar,. Argon has 17 electrons, then the remaining electrons fills up the 4s, 3d and 4p sub-orbitals.
  • Thus, the noble-gas configuration of As is [Ar] 4s²3d¹⁰ 4p³
6 0
2 years ago
Which statement is always true about conversation of matter?
Firlakuza [10]

Answer:

The mass of a system does not change during a chemical reaction

Explanation:

Correct Answers

8 0
2 years ago
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