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How many atoms are there in 0.75 mol of water? Give answer to 2 decimal places

Number of particles of water = avogadro constant x amount in molTherefore6.02 x10²³ x 0.75= 4.515 x10²³There are 3 atoms in every molecule of water so we need to multiply the number ...

Answered by Alicia R. • Chemistry tutor

3542 Views

What is the significance of the number e (Euler's number)?

The irrational number e is one of the most important numbers in mathematics. The value of it is 2.718... but since it is irrational that is e to 4 significant figure, only. How can we calculate this numbe...

Answered by Soleiman A. • Maths tutor

4553 Views

Explain why relations between the USA and USSR worsened in the years 1947-49.

The USA and USSR had been allies during WWII, but this relationship soon broke down and worsened in the late 1940s. One of the main reasons for this was the announcement of the Truman Doctrine in March 19...

Answered by Beatrice M. • History tutor

5297 Views

If -3x + 10y = -100 and 13x + 10y = 60, solve for x and y.

This can be solved simultaneously. This is about manipulating the equations until they're in a format that you can use.Label the equations:eq1: -3x + 10y = -100 and eq2: 13x + 10y = 60Now, eq1 - eq2 gives...

Answered by Olyvia J. • Maths tutor

3064 Views

One of the decays of potassium (A=40, Z=19) results in an excited argon atom with excess energy of 1.50 Mev. In order to be stable, it emits a gamma photon. What frequency and wavelength has this gamma photon?

The nucleus of the atoms are usually in excited states after performing a beta decay. By emitting a photon, the nucleus recover stability. The emitted photon has the same energy as the excess energy of th...

Answered by Marcos S. • Physics tutor

3191 Views