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Aloiza [94]
3 years ago
9

Please help!! Need to know what it is!

Chemistry
2 answers:
Kamila [148]3 years ago
7 0

Answer:

The correct answer will be 15

Sidana [21]3 years ago
5 0

Answer:

<h3>15 </h3>

Explanation:

  • it is fifteen. 15 heheheehehehhehehehehehhehehe
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What labatory activity involves a chemical change
mojhsa [17]

Answer:

buring of paper, burning of wood etc are the examples of chemical change

8 0
3 years ago
Which of the following was most likely NOT present in creating the amino acids of early Earth's water of the past? A. ammonia B.
Igoryamba
B or D but id say go with D

7 0
3 years ago
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Which of the following gases effuses the fastest at a given temperature?
Sholpan [36]

Answer: -

H₂ will diffuse the fastest.

Explanation: -

According to Graham's Law of Diffusion

The rate of diffusion is inversely proportional to the square root of it's density or molar mass. So the lower the molar mass faster the rate of diffusion.

Molar mass of Ne = 20 g / mol

Molar mass of CH₄ = 12 x 1 + 1 x 4 = 16 g /mol

Molar mass of Ar = 40g / mol

Molar mass of H₂ = 1 x 2 = 2 g / mol

Thus H₂ will diffuse the fastest.

7 0
3 years ago
A state of matter with a changing shape and changing volume
lora16 [44]

Answer:

Gas is the state of mater which changing its shape and volume according to the volume and shape of container.

Explanation:

Gas is the state of mater which changing its shape and volume according to the volume and shape of container.

Properties of gas:

Molecule of gases randomly move everywhere and occupy all available space.

Gases don't have definite volume and shape and take the shape and volume of container in which it present.

Their densities are very low as compared to the liquid and solids.

Gas molecules are at long distance from each other therefore by applying pressure gases can be compressed.

The very weak inter molecular forces are present between gas molecules.

5 0
3 years ago
Consider the following precipitation reaction: Pb(NO3)2(aq) + 2KI(aq) → PbI2(s) + 2KNO3(aq). Which ions are spectator ions? pls
Marta_Voda [28]

Potassium and Nitrate ions are spectator ions in the reaction:

Pb(NO_3)_2(aq) + 2KI(aq) → PbI_2(s) + 2KNO_3(aq).

<h3>What are spectator ions?</h3>

Ions that are not involved in the actual chemical reaction are called spectator ions.

A precipitation reaction occurs when two ionic compounds react to produce a precipitate and an insoluble substance which stays in the solution as a spectator ion.

Hence, Potassium and Nitrate ions are spectator ions in the reaction:

Pb(NO_3)_2(aq) + 2KI(aq) → PbI_2(s) + 2KNO_3(aq).

Learn more about the spectator ions here:

brainly.com/question/14050476

#SPJ1

6 0
2 years ago
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