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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...
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Answered by Joseph P. • Maths tutor
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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...
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Answered by Adham S. • Japanese tutor
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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 + (...
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Answered by Joshua H. • Chemistry tutor
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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
32425 Views

What is the relative formula mass of CaCO3?

The relative formula mass (RFM) is simply just a sum of the atomic masses that make up the compound in question. Ca = 40 C = 12 O = 16 RFM of CaCO 3 = 40 + 12 + (16 x 3) = 100 Note we have three oxygens so w...
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Answered by Joshua H. • Chemistry tutor
74475 Views