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A 1.00 carat pure diamond has a mass of 0.2 grams. How many carbon atoms are there within this diamond?
In this example you have 0.2 grams of carbon atoms. The first step is to find out how many moles this is. The molar mass of carbon is 12.01 g/mol,...
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Compare the mineral halite (NaCl, hardness of 2.5) to diamond which is pure carbon chemically bonded to itself in a network. Are the mineral's chemical bonds covalent, polar covalent, or ionic? Which mineral is harder?
On Mohs scale, isn't diamond assigned a $10$ on the basis of hardness? Halite is almost a purely ionic material.
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Sodium chloride is $NaCl$, and sodium sulfide is $Na_2S$. Why are there more sodium ions in the sulfide compound?
Sodium chloride is composed of $Na^+$ ions and $Cl^-$ ions. Now of course salt is neutral; and to ensure this sodium ion and chloride ions combine 1:1. On the other...
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Consider the following element combinations. Classify the bonds formed between each pair as ionic, polar covalent, or nonpolar covalent qualitatively based solely on each element's position on the periodic table? Do not conduct calculations.
Something worth knowing about deciding between nonpolar and polar is that only two of the same element can form an ideally nonpolar bond. With this in mind, the $"Br"-"Br"$...
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Classify each solid as a covalent, ionic, metallic, or molecular solid? Diamond, frozen carbon dioxide, pure sodium, and sodium sulfide
$CO_2(s)$ is molecular, with the individual molecules held together by (weak) dispersion forces. Sodium exhibits ; i.e. positive ions in an electron sea, which gives rise to demonstrable malleability and...
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When 3.0 g of carbon is burnt in 8.0 g of oxygen, 11.0 g of carbon dioxide is produced. what is the mass of carbon dioxide will be formed when 3.0 g of carbon is burnt in 50.0 g of oxygen? Which law of chemical combination will govern the answer?
When a $3.0*g$ mass of carbon is burnt in an $8.0*g$ mass of dioxygen, the carbon and the oxygen are stoichiometrically equivalent. Of course, the combustion reaction proceeds according to...
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The weight of a diamond is given in carats. One carat is equivalent to 200 mg. A pure diamond is made up entirely of carbon atoms. How many carbon atoms make up a 1.00 carat diamond?
Convert 200 mg to g. $"1000 mg=1 g"$ $200cancel"mg"xx(1"g")/(1000cancel"mg")="0.2 g"$ Convert carats to grams to moles. $"1.00 ct=0.2 g"$ $1"mol C=12.0107 g C"$ $1.00cancel"ct C"xx(0.2cancel"g C")/(1cancel"ct C")xx(1"mol C")/(12.0107cancel"g C")="0.02 mol...
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Copper will react with sulfur to form a copper sulfide, if 1.500g copper reacts with sulfur to form 1.880g of copper sulfide, what is the empirical formula of the copper sulfide?
The idea here is that you need to use the mass of copper and the mass of the copper sulfide to determine how much sulfur the produced compound contains, then...
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How many grams of sodium sulfide are formed if 1.50 g of hydrogen sulfide is bubbled into a solution containing 2.00 g of sodium hydroxide, assuming that the sodium sulfide is made in 94.0 % yield?
The first step for any chemical reaction is to write out the chemical equation to determine the molar ratios of the reactants and products. Then we will use the molecular...
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Ethene undergoes incomplete combustion to form carbon dioxide, carbon monoxide and water vapour. If the ratio of carbon dioxide to carbon monoxide formed is 9:1 when x cm^3 of ethene is burnt, what is the volume of oxygen gas consumed in the reaction?
Ethene undergoes incomplete combustion to form carbon dioxide, carbon monoxide and water vapour. The balanced equation of this incomplete combustion reaction is as follows. $C_2H_4(g)+5/2O_2(g)->CO_2(g)+CO(g)+2H_2O(g)$ But as per question the...
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