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Rearrange the formula to make 'y' the subject: x = (1 - 2y)/(3 +4y)

Ok so we need to get 'y' by itself on the left hand side of equal sign. We will first try to remove the denominator by multiplying 'x' by (3+4y). This gives (3+4y)x = 1 - 2y. We will then expand the brackets...
WI
Answered by Wajiha I. • Maths tutor
18177 Views

What is the highest common factor of 24 and 90?

To find the highest common factor of 24 and 90 we do this in three steps: 1. Find the prime factorisation of the two numbers. This means rewrite each given number as a product of only prime numbers. The prim...
JP
Answered by Joseph P. • Maths tutor
14155 Views

How do you form the '-te' form of verbs?

Take the '-masu' ending off the verb, leaving the stem (e.g. 'kaemasu --> kae-') and just add '-te'. The '-te' form is extremely useful: combine it with 'kudasai' to ask someone to do something, with 'ima...
AS
Answered by Adham S. • Japanese tutor
11161 Views

What mass of CO2 will be produced when 50 g of CaCO3 decomposes?

CaCO 3 decomposition: CaCO 3 -> CaO + CO 2 The first thing to do here is to calculate the relative formula mass of CaCO 3 and CO 2 . RFM of CaCO 3 = 40 g + 12 g + (16 g x 3) = 100 g RFM of CO 2 = 12 g + (...
JH
Answered by Joshua H. • Chemistry tutor
99667 Views

The relative formula mass of CaO is 56 and the relative formula mass of CO2 is 44. What is the mass of CaO that can be obtained from 200 g of CaCO3. CaO3 -> CaO + CO2

We are given the relative formula mass (RFM) of CaO and CO 2 , we should therefore calculate the RFM of CaO 3 : RFM of CaCO 3 = 40 + 12 + (16 x 3) = 100 If we look at the reaction in the question, we can see...
JH
Answered by Joshua H. • Chemistry tutor
32298 Views