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Which Group 16 element combines with hydrogen to form compound that has the strongest hydrogen bonding between its molecules?
You know the normal boiling point of water. The normal boiling point of hydrogen sulfide is $-60$ $""^@C$; that of hydrogen selenide is $-41.2$ $""^@C$; that of hydrogen telluride is...
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What are valence electrons? How many valence electrons are possessed by the nitrogen atom?
Nitrogen is in Group V. It has 5 . Do I win £5-00?
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Based on the electron configuration of sulfur, S, a sulfur atom will gain or lose how many valence electrons when bonding with lithium?
$2Li + S rarr Li_(2)S$ And if we wanted to (which we do) we could split this up into half equations: $2Li rarr 2Li^(+) + 2e^(-)$ $"Oxidation"$ $S+2e^(-) rarr S^(2-)$...
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As a bond between a hydrogen atom and a sulfur atom is formed, are the electrons shared or transferred to form a covalent or ionic bond?
Comparing their electronegativities will help determine the type of bond. is the tendency of a bonded atom to attract shared electrons to itself. The difference in electronegativity $(Delta"EN")$ is used...
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One chlorine (Cl) atom combines with one sodium (Na) atom. How many potassium (K) atoms combines with a chlorine atom?
$"Sodium chloride, potassium chloride, rubidium chloride,"$ $"caesium chloride,"$ all have a formula of $MCl$, where $M$ is the alkali metal. All the alkali metals have similar electronic configurations; thus they...
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Zinc phosphide, $Zn_3P_2$, is often used as a rat poison. Phosphorus has 5 valence electrons. How many valence electrons does each zinc atom lose?
And the zinc cation is $Zn^(2+)$. When the ions form a salt, clearly they form an electrically neutral species; and thus the formulation of the salt is $Zn_3P_2$. Each phosphorus...
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A carbon compound contains 12.8% of carbon, 2.1% of hydrogen and 85.1% of bromine. The molecular weight of the compound is 187.9. What is the molecular formula of the compound?
(Atomic weight: H = 1.008, C = 12.0, Br = 79.9)
As always with these problems, it is useful to assume $100*g$ of unknown compound....and thus find an empirical formula... $"Moles of carbon"=(12.8*g)/(12.011*g*mol^-1)=1.066*mol.$ $"Moles of hydrogen"=(2.1*g)/(1.00794*g*mol^-1)=2.084*mol.$ $"Moles of bromine"=(85.1*g)/(79.90*g*mol^-1)=1.066*mol.$ And we...
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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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If 0.225 mol of tin combines with 0.450 mol of sulfur, what is the empirical formula of the tin sulfide product?
By definition, the empirical formula is the simplest whole numer ratio that defines constituent atoms in a species. Normally we are given percentages, and use this mass percent to determine...
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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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