Top answers

3.786g of hydrated zinc sulphate, ZnSO4•xH2O, is heated to remove all water of crystallisation. The mass of anhydrous ZnSO4 formed is 2.122g. What is the formula of the hydrated zinc sulphate?

Water of crystallisation describes water molecules that are bonded into a crystalline structure of a compound. By knowing the mass of the hydrated salt (3.786g) and of the anhydrous salt (2.122g) it is possi...
CF
Answered by Claire F. • Chemistry tutor
11430 Views

What is the eschatological verification by John Hick?

The Eschatological Verification is from John Hick's book Faith and Knowledge (1966) which was written as a response to the rise in Logical Positivism. Logical Positivism is the idea that: if something cannot...
Answered by • Religious Studies tutor
15123 Views

How is a resting potential achieved?

At resting potential the voltage of the cell is ~ -65mV A neurone sends an impulse from sensory receptorsThis causes sodium ion channels to open on the dendritesThis allows the movement of Na+ ions into the ...
Answered by • Biology tutor
3858 Views

Scrivete una breve biografia di un amico o di una persona della tua famiglia o di una persona famosa.

La mia mamma si chiama Mathilde e la settimana scorsa ha compiuto 50 anni. Di origini è olandese ma a l' età di 18 anni si è trasferita a Firenze per studiare arte dove si i è graduata tre anni dopo. Come mo...
CH
Answered by Caspar H. • Italian tutor
5445 Views

The standard enthalpy of formation of glucose is -1273.3kJ/mol, and for carbon dioxide it is -393.5kJ/mol, and for water -285.8 kJ/mol. What is the standard enthalpy of combustion of glucose, C6H12O6?

The reaction equation has the form C 6 H 12 O 6 + x O 2 -> y CO 2 + z H 2 O. Balancing carbons, y = 6. Balancing hydrogens, z =6, so by balancing oxygen atoms, x = 6. Then we use a Hess's law cycle ( to b...
AC
Answered by Amber C. • Chemistry tutor
44473 Views