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The energy required to melt a substance can be calculated using the formula: Energy = mass x heat of fusion. For water, the heat of fusion is 334 J/g. Therefore, the energy required to melt 56g of water would be 56g x 334 J/g = 18,704 J.

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1y ago

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How many moles of CC14 are present in 56g?

This is carbon tetra chloride. there are 0.3636 moles in this mass.


What mass of carbon dioxide would be produced when 2.00g of limestone is heated?

The chemical formula for limestone is CaCO3. When heated, limestone decomposes to produce calcium oxide (CaO) and carbon dioxide (CO2). The molar mass of CaCO3 is 100.09 g/mol. To calculate the mass of CO2 produced, you would first calculate the moles of CaCO3 in 2.00g, then use the stoichiometry from the balanced chemical equation to determine the moles and then mass of CO2 produced.


Calculate the mass of lime CaO that can be prepared by heating 200kg of limestone that is 95 percent pure CaCo?

To calculate the mass of CaO that can be prepared from 200kg of limestone that is 95% CaCO3, first calculate the mass of CaCO3 in the limestone: 200kg * 0.95 = 190kg. Next, use the molar mass of CaCO3 (100.09 g/mol) and CaO (56.08 g/mol) to determine the mass of CaO formed: (190kg * 1000g/kg * 56.08g/mol) / 100.09g/mol = 107,004 g or 107.004 kg of CaO.


A substance has a mass of 90 g and occupies a volume of 15 ml What is the density of this substance?

D = m/V D = 56g/15ml D = 3.7g/ml


How does the maximum yield of products for a reaction depend on the limiting reactant?

The best way to answer this question is with an example. Using Calcium oxide reacting with hydrochloric acid, the reaction formula is: CaO + 2HCl ----->CaCl2 + H2O The molecular weight for Calcium Oxide is 56, for Hydrochloric acid is 26.5 and for calcium chloride 110. If you start with only 56g of Calcium oxide but say 10000g of hydrochloric acid, the maximum yield of the product calcium chloride can only ever be 110g. It does not matter how much hydrochloric acid is added. The limiting reactant in this example is the calcium oxide.