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3 years ago

Explain the relationship between isotopes, neutrons, atomic mass, and protons.

Chemistry

2 answers:

romanna [79]3 years ago

6 0

Answer:

Atomic mass is the total of number of protons and number of neutrons in an atom or isotope.

Explanation:

Triss [41]3 years ago

5 0

Explanation:

<u>Atomic mass</u>: The sum of no. of protons and no. of neutrons

<u>Protons</u>: a subatomic particle with a positive charge

<u>Neutron</u>: a subatomic particle with no charge (neutral)

<u>Isotopes: </u>the same elements with different atomic mass [Eg. uranium-235, uranium-238. Uranium being one element, can have different mass numbers. Hence Uranium-238 is an isotope of Uranium-235]

<u>Therefore</u>:

<h3>Proton + neutrons= Atomic mass</h3><h3>Δatomic mass= formation of isotopes. </h3>

<em>*Δ= Change in</em>

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What must be part if a quantitative observation?

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A quantitative observation must be a measurement of some sort. (Something including numbers). Qualitative, on the other hand, is when you are using words to describe what has happened.

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4 years ago

What is the Molar Mass of methylammonium bromide: Use the Periodic Table and round to the nearest hundredths.

egoroff_w [7]

The molar mass of methylammonium bromide is 111u.

<h3>What is molar mass?</h3>

The molar mass is defined as the mass per unit amount of substance of a given chemical entity.

Multiply the atomic weight (from the periodic table) of each element by the number of atoms of that element present in the compound.

Add it all together and put units of grams/mole after the number.

Atomic weight of H is 1u

Atomic weight of N is 14u

Atomic weight of C is 12u

Atomic weight of Br is 79u

Calculating molar mass of $2H_3NCH_3Br$ =2(1 x3+ 14+12+ 1 x 3 +79) = 111u

Hence, the molar mass of methylammonium bromide is 111u.

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2 years ago

A vessel with a volume of 32. 5 l contains 2. 80 g of n2 gas, 0. 403 g of h2 gas, and 79. 9 g of ar gas. at 25°c, what is the to

d1i1m1o1n [39]

The total pressure of the gases in the vessel is found out by using the partial pressures of individual gases and adding them up. The total pressure of the gases in the vessel is 1.72 atm.

The Partial pressure of the gases is the individual pressure of the gases present in a vessel containing a mixture of gases. The total pressure can be found out by adding partial pressure of all gases.

Given:

Volume of vessel, V= 32.5L

Mass of Nitrogen gas = 2.8g

Mass of Hydrogen gas = 0.403g

Mass of Argon gas = 79.9g

We know that:

Molar Mass of Nitrogen gas = 28g

Molar Mass of Hydrogen gas = 2g

Molar Mass of Argon gas = 40g

∴ Moles of gas = Given mass / Molar mass

∴ Using the Ideal Gas Equation:

PV = nRT

where, P is the Pressure of gas

V is the volume of gas

n is the moles of gas

R is the Universal Gas constant

T is the temperature

Applying the above equation of all three gases indivudually,

∴ For Nitrogen,

P₁V = n₁RT

⇒ P₁ × 32.5 = 2.8/28 × 0.082 × 298

⇒ P₁ = 0.07atm

∴ For Hydrogen,

P₂V = n₂RT

⇒ P₂ × 32.5 = 0.4/2 × 0.082 × 298

⇒ P₂ = 0.15 atm

∴ For Argon,

P₃V = n₃RT

⇒ P₃ × 32.5 = 79.9/40 × 0.082 × 298

⇒ P₃ = 1.5 atm

∴ Total pressure of vessel, P = P₁ + P₂ + P₃

P = 1.72 atm

The total pressure of the gases in the vessel is 1.72 atm.

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1 year ago

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andreev551 [17]

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3 years ago

True of False: The 8-Step Problem Solving Process was developed as an intended expansion of OODA Loop.

olga55 [171]

The 8-Step Problem Solving Process is vital to solving problems in an organized way and it's an extended form of OODA Loop. Therefore, it's logically true.

The 8-Step Problem Solving Process include the following:

Defining the problem.
Clarifying the problem.
Defining the goals.

Identification of the root cause of the problem.
Development of an action plan.
Executing action plan.

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Continuous improvement.

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