Top answers

What is transcription?

Protein synthesis is the production of new proteins. This happens in two stages, transcription and translation Transcription - forming mRNA from DNA 1) The DNA section to be copied (gene) is unwound by helic...
RH
Answered by Rebecca H. • Biology tutor
13585 Views

The mass of a balloon is 0.02g before it is filled with air. After it is blown up with air the mass is 0.04g. Assuming oxygen makes up 21% of air, calculate the number of moles of oxygen in the balloon.

After the balloon has been blown up with air it increased its size by 0.02 g (Final mass - initial mass = mass of the air).We are told that of oxygen takes up 21% of air. Therefore, we need to work out 21% o...
GS
Answered by Greta S. • Chemistry tutor
3341 Views

How do you factorise a quadratic equation where the coefficient of x^2 isn't 1?

For this, we need to use the formula ax 2 +bx+c. Multiply the coefficient of a from your equation with the value of c. This gives you a value from which you need to find 2 factors of this value which also ad...
RG
Answered by Rosie G. • Maths tutor
7368 Views

What is the problem of evil?

According to many passages in the Bible, God is said to be omnibenevolent (all-loving), omnipotent (all-powerful) and omniscient (all-knowing). Evidence of evil in our world is abundant, with moral evil taki...
KS
2650 Views

Describe the bonding in sodium chloride

Sodium chloride is an ionic compound formed by the strong ionic attractions between positively charged sodium ions (which have lost one electron) and negatively charged chloride ions (which have gained an el...
MF
Answered by Matthew F. • Chemistry tutor
4599 Views