Search our library of homework questions

Top answers

All subjects

All levels

Describe the structure of the periodic table

The elements in the periodic table are arranged in terms of atomic number. i.e. hydrogen is first as it has 1 proton, then helium with 2, lithium with 3 etc.Elements in the same group have the same number...

Answered by Charles W. • Chemistry tutor

5374 Views

What is the reaction between Zinc and Sulphuric Acid?

When a metal reacts with an acid it forms a salt and hydrogen gas.The salt will be a sulphate due to the acid being H₂SO₄So, Zn + H₂SO

Answered by Charles W. • Chemistry tutor

8919 Views

Explain the problem of suffering.

The problem of suffering is the apparent discrepancy between the existence of God on the one hand, and the occurence of suffering in the world on the other. The problem results from the fact that traditio...

Answered by Jonathan P. • Religious Studies tutor

3428 Views

Solve 3x^2 + 13x + 14 = 0

Firstly, you need factorise.a = 3 b = 13 c = 14Find 2 numbers which add to make b(13) and multiply to make ac(42). These numbers are 6 and 7You can now split up the x coefficient to: 3x^2 + 6x + 7x + 14. ...

Answered by Charles W. • Maths tutor

5353 Views

Explain the trend in first ionisation energy as you go across Period 3

Overall, the first ionisation energies will increase. This is because as you go along the period, the atomic number increases and this causes a stronger electrostatic attraction between the outer electron...

Answered by Charles W. • Chemistry tutor

19307 Views