## What is the mass of 8.50 x10 22 molecules of NH3?

Refer to the formula that 1 mole of a substance is equal to 6.022 X 10^23 molecules of NH3. So, 1 mole of NH3 has mass of 17.031 g. The mass of 8.50 X 10^22 molecules of NH3 = (8.50 X 10^22/6.022 X 10^23) X 17.031 g = 2.4 g.

∴ Mass = 8.5 g.

17.03052 g/mol
17.03052 g/mol .

## What is the mass of 10 molecules of NH3?

Answer: The molar mass of NH3 is equalled to 17 gram. Moles of NH3 in 8.5 gm =8.5/17=0.5thus molecules in half mole NH3 is 6.022×10^23×0.5and atoms in half mole NH3=0.5× 6.022×10^23×48.5/17 = 0.50.

## What is the mass of 9.50 x 10 22 molecules of water?

27.72 g
Therefore, the mass of 9.25×1022 molecules of water is 27.72 g .

## What is the molecular mass of NH3 in U?

Hence, molecular mass of NH3 is 17 u.

## What is the molecular mass of NH3 Class 9?

Molecular mass of NH3 =(Molecular mass of N) + 3×(Molecular mass of H) =14+3×1 u =17 u.

## What is the molar mass of NH3 Brainly?

The molar mass of NH3 is 17.03 g.

## How do you calculate mass number?

Together, the number of protons and the number of neutrons determine an element’s mass number: mass number = protons + neutrons. If you want to calculate how many neutrons an atom has, you can simply subtract the number of protons, or atomic number, from the mass number.

## How much is my mass?

To find an object’s mass using its weight, the formula is Mass equals Weight divided by the Acceleration of Gravity (M = W ÷ G). Convert the weight measured in pounds to the equivalent in Newtons.

## What is mass number in chem?

The mass number (represented by the letter A) is defined as the total number of protons and neutrons in an atom. Consider the table below, which shows data from the first six elements of the periodic table. Consider the element helium. Its atomic number is 2, so it has two protons in its nucleus.

## What is the mass of an electron answer?

The rest mass of the electron is 9.1093837015 × 1031 kg, which is only 1/1,836the mass of a proton. An electron is therefore considered nearly massless in comparison with a proton or a neutron, and the electron mass is not included in calculating the mass number of an atom.

## How do you find an element’s atomic number?

The atomic number of an atom is equal to the number of protons in the nucleus of an atom or the number of electrons in an electrically neutral atom. For example, in a sodium atom, there are 11 electrons and 11 protons. Thus the atomic number of Na atom = number of electrons = number of protons = 11.

## Is atomic mass a mass number?

Atomic mass is also known as atomic weight. Atomic mass is the weighted average mass of an atom of an element based on the relative natural abundance of that element’s isotopes. The mass number is a count of the total number of protons and neutrons in an atom’s nucleus.

## What does an element’s atomic weight determine?

The total weight of an atom is called the atomic weight. It is approximately equal to the number of protons and neutrons, with a little extra added by the electrons. The stability of the nucleus, and hence the atom’s radioactivity, is heavily dependent upon the number of neutrons it contains.

## How do you write the atomic number and mass number?

Mass Number(A) = Number of Protons + Number of Neutrons

An isotope of any element can be uniquely represented as AZX, where X is the atomic symbol of the element, A is the mass number and Z is the atomic number. The isotope of carbon that has 6 neutrons is therefore 126C.

## How is atomic weight calculated?

The atomic weight of any atom can be found by multiplying the abundance of an isotope of an element by the atomic mass of the element and then adding the results together. This equation can be used with elements with two or more isotopes: Carbon-12: 0.9889 x 12.0000 = 11.8668.