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zloy xaker [14]
3 years ago
5

Plzz!!! I need help now this is science

Chemistry
1 answer:
Neko [114]3 years ago
5 0
1)300-100=200N
2)300+100=400N
3)200+100-300=300-300=0N
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Na-23 has 12 neutrons. What is it’s atomic number?
Dennis_Churaev [7]

Answer:

11

Explanation:

The atomic number for Na will always be the same regardless of the number of neutrons.

7 0
4 years ago
A chemistry student is given 250.0 mL of clear aqueous solution at 42 C. He is told an unknown amount of a certain compound X is
lara [203]

Answer:

No

Explanation:

The solubility of a solid in water refers to the amount of that solid that dissolves in water.

It is not possible to calculate the solubility of the solid because the student threw away the first precipitate that formed. We already have the volume of water, but having lost some mass of precipitate, it has become impossible to accurately determine the solubility.

Hence the answer provided above.

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3 years ago
El nombre tradicional CuO
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3 years ago
A balloon with a volume of 2.0 L at 25°C is placed in a hot room at 35°C. The pressure on the balloon is constant at 1.0 atm. Ho
7nadin3 [17]

Answer:

The volume increases,

Final volume is 2.1L

Explanation:

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As the balloon change increases its temperature, the volume increases

The Boyle's equation is:

V1T2 = V2T1

<em>Where V is volume and T is absolute temperature of 1, initial state and 2, final state of the gas.</em>

<em />

Replacing:

V1 = 2.0L

T2 = 35°C + 273.15 = 308.15K

V2 = ?

T1 = 25°C + 273.15 = 298.15K

2.0L*308.15K = V2*298.15K

2.1L = V2

<h3>Final volume is 2.1L</h3>

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4 0
3 years ago
Write the structural formula for a primary, a secondary, and a tertiary constitutionally isomeric alcohol of the molecular formu
9966 [12]

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Their classification of primary, secondary, and tertiary alcohols are -

1-pentanol -

2-pentanol -

3-pentanol

2-methylbutan-1-ol

2-methylbutan-2-ol

3-methylbutan-2-ol

3-methylbutan-1-ol

2,2-dimethylpropanol

5 0
3 years ago
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