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How do I calculate the relative formula mass of Calcium carbonate (CaCO3)

The relative formula madd of a compound comes from the total mass of all of the elments within the compound. So in the case of calcium carbonate (CaCO 3 ) we have; 1 x Ca 1 x C 3 x O So we first need to know...
JB
Answered by Jenny B. • Chemistry tutor
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What is the mass (in grams) of 0.1 moles of CaCO3?

Use the equation mass(g) = moles x MrThe moles are given in the question, moles= 0.1 molLook at a periodic table to work out the Mr of CaCO3: Ca= 40 C= 12 O= 16 Therefore Mr= 40+12+(16x3) = 100So mass (g)= 0...
SS
Answered by Sophie S. • Chemistry tutor
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Why can graphite conduct electricity but diamond can not?

In diamond the carbon atoms are bonded to four other atoms. Whereas, in graphite each carbon atom is only bonded to three other atoms. Therefore, there are delocalised (free) electrons in graphite, which can...
SS
Answered by Sophie S. • Chemistry tutor
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2.4 g of magnesium reacts with 1.6 g of oxygen. What is the empirical formula of the oxide formed?

Ar of Magnesium = 24; Ar of Oxygen = 16 number of moles = mass divided by Ar number of moles of Mg = 2.4/24 = 0.1 number of moles of Oxgen = 1.6/16 = 0.1 ratio of Mg to O = 0.1:0.1 = 1:1 So oxide produced is...
KT
Answered by Katrina T. • Chemistry 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 + (...
JH
Answered by Joshua H. • Chemistry tutor
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