Hydrated copper(II) sulfate has the formula CuSO4·5H2O. 100 cm3 of a solution contained 10 g of hydrated copper(II) sulfate. What is the concentration, in mol / dm3, of this solution?…

The family tree shows the inheritance of freckles. Which row in the table shows the probability that the next child produced by parents 1 and 2, and the probability that…

Express 1 + 1 – 12x x-1 x as a single algebraic fraction. Answer: 20) E 1 + 1 – 12x x-1 x Let us do the first part of…

A swimming pool is 10 m wide. A loud sound is made in the water 2.0 m from one wall and the reflected sounds are detected with a microphone placed…

Propanoic acid is a monoprotic acid. Magnesium is a Group 2 metal. Which of the following chemical equations is correct for the reaction between magnesium carbonate and propanoic acid? Answer:…

The diagram shows an external view of the human heart. Which of the following statements about the artery shown on the diagram is/are correct?1 It is the site of diffusion…

Disproportionation is the simultaneous oxidation and reduction of the same species in areaction.In which of the following chemical equations does disproportionation occur?1 Fe + CuCl2 → FeCl2 + Cu2 Cu…

Dolly the sheep was born in 1996. She was unusual because she had no biological father. Sheep have a diploid number of 54 chromosomes in their body cells. The diagram…