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How do I calculate the relative formula mass of FeSO4 and the number of moles, when the formula mass of O=16, S=32, Fe=56 and the mass of FeSO4= 380g

The formula mass (Mr) of FeSO4 is the total mass of all the individual elemenets added together. So the Mr of FeSO4 = (1 x Fe) + (1 x S) + (4 x O) = 56 + 32 + 4x16 = 152 To calculate moles, the equation for ...
HM
Answered by Henry M. • Chemistry tutor
73694 Views

How do I simplify the following equation x^2+5x+6

Firstly write out the question. x^2+5x+6. After this look at the constant without any x's. In this case that number is 6. Now look at the number 6 and work out the combination of factors for 6. Do this such ...
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Answered by Henry M. • Maths tutor
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¿Qué te gusta hacer en tu tiempo libre?

Example response: En mi tiempo libre me gusta dibujar y ir al parque para jugar al fútbol con mis amigos. También me gusta mucho viajar porque me interesa visitar nuevos países.
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Answered by Kathryn M. • Spanish tutor
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Charles Darwin found that finches from different islands had different sized beaks. Explain why one island may have finches with large short beaks and another may have finches with long thin beaks.

The differences in the birds' beaks are due to evolution and natural selection. One island may have an abundance of seeds and nuts which require a large beak to crack them open, meaning that birds with a phe...
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Answered by Poppy B. • Biology tutor
3156 Views

Describe with a real world example, price elasticity of demand

Price elasticity of demand (PED) is a measure used to show the responsiveness of the quantity demand of a good to a price change and is generally expressed in percentages. This is extremely important for fir...
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Answered by Dylan J. • Economics tutor
19261 Views