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NemiM [27]
3 years ago
8

What is an atomic number? An atomic mass?

Chemistry
2 answers:
Svetradugi [14.3K]3 years ago
8 0

Answer:

Atomic number

The number of protons in the nucleus of an atom.

Atomic Mass

The mass of an atom of a chemical element expressed in atomic mass units.

mrs_skeptik [129]3 years ago
4 0

Answer:

The atomic number is the number of the elements inside the periodic table and the mass is the weight or a number under the elements.

Explanation:

Correct me if I am wrong

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Select the correct answer. Which statement is true for a heating curve?
Anon25 [30]

Answer:

OB

Explanation:

tht is correct make me brainliest

8 0
2 years ago
2. A sample of oxygen gas is placed in a rigid 1.5L glass container at STP. If the gas is
sladkih [1.3K]

The new pressure : P₂ = 1038.39 mmHg

<h3>Further explanation</h3>

Given

1.5 L container at STP

Heated to 100 °C

Required

The new pressure

Solution

Conditions at T 0 ° C and P 1 atm are stated by STP (Standard Temperature and Pressure).

So P₁ =  1 atm = 760 mmHg

T₁ = 273 K

T₂ = 100 °C+273 = 373 K

Gay Lussac's Law  

When the volume is not changed, the gas pressure is proportional to its absolute temperature  

\tt \dfrac{P_1}{T_1}=\dfrac{P_2}{T_2}

Input the value :

P₂=(P₁.T₂)/T₁

P₂=(760 x 373)/273

P₂ = 1038.39 mmHg

7 0
2 years ago
How is the periodic table organized?
joja [24]

Answer:

The periodic table of elements arranges all of the known chemical elements in an informative array. Elements are arranged from left to right and top to bottom in order of increasing atomic number. Order generally coincides with increasing atomic mass. The rows are called periods.

Explanation:

8 0
3 years ago
Read 2 more answers
A fly hits a windshield of a truck. The truck exerts a force on the fly, and
sweet-ann [11.9K]

Answer:

A fly hits a windshield of a truck.

Explanation:

newton's first law

7 0
3 years ago
What is the energy of an electron in the third energy level of hydrogen?
Roman55 [17]

Answer:

Electrons in a hydrogen atom must be in one of the allowed energy levels. If an electron is in the first energy level, it must have exactly -13.6 eV of energy.

...

Energy Levels of Electrons.

Energy Level Energy

1 -13.6 eV

2 -3.4 eV

3 -1.51 eV

4 -.85 eV

4 0
3 years ago
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