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$"Atom W has 9 protons and 9 neutrons, Atom X has 8 protons and 9"$ $"neutrons. Atom Y has 9 protons, and 9 neutrons. Atom Z has 10 protons"$
$"and 10 neutrons."$
What are the isotopes?
And $Z$ defines the identity of the element: $Z=1,H;Z=2,He;..........Z=6,C;........Z=37, Ru...........$ You don't have to remember these numbers, because a Periodic Table will be supplied to you in every test of...
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Magnesium reacts with hydrochloric acid according to the following equation: $Mg(s) + 2HCl(aq) -> MgCl_2(aq) +H_2(g)$. What mass of hydrogen will be obtained if 100 $cm^3$ of 2.00 mol $dm^-3$ HCl are added to 4.86 g of magnesium?
So you have the balanced equation, that's a good start. So what we're looking for is the ratio of hydrogen gas produced per the limiting reactant, let's find that first,...
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A 10.0 g sample of magnesium reacts with oxygen to form 16.6 g of magnesium oxide. How many grams of oxygen reacted?
The idea here is that chemical reactions must obey the Law of , which states that when a chemical reaction takes place, the total mass of the reactants must be...
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Magnesium reacts with titanium(4) chloride to produce magnesium chloride and titanium metal. How do you write a balanced equation for this reaction?
Because the magnesium ion has a +2 charge, the formula for magnesium chloride is $MgCl_2$. To balance the four Cl ions in titanium (IV) chloride, the reaction must produce 2...
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I did a Magnesium Oxide Lab.Magnesium often reacts with nitrogen in the air. If some of the magnesium had reacted with the nitrogen, would it make the % composition of ur sample higher or lower than it should be? Explain (Hint-Try a sample calculation).
Okay, so you've performed the classic magnesium oxide lab. I assume that you have your data, so I'll just walk you through this from a theoretical standpoint. So, you...
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Magnesium reacts with nitrogen to form magnesium nitride. The chemical formula for this reaction is $Mg+N_2-> MgN_2$. What is the product, or what are the products, of this reaction?
As do many active metals, magnesium nitride can be formed by heating the metal (fiercely!) under dinitrogen gas: $3Mg + N_2 stackrel(Delta)rarr Mg_3N_2$ As a nitride it can by hydrolyzed...
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Write and balance the following word reactions, and state if a precipitate is formed? Barium cyanide reacts with ammonium sulfate. Potassium hydroxide reacts with magnesium chloride.
These are regular double-replacement reactions, of the form $AB + CD -> AD + CB$. Basically, the cations switch, and charge is considered when determining the number of...
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A mixture of magnesium carbonate and magnesium oxide of mass $12.46*g$ underwent fierce heating. After heating, there were $8.43*g$ of salt remaining. What were the masses of magnesium carbonate, and magnesium oxide in the original sample?
$MgCO_3(s)+DeltararrMgO(s) + CO_2(g)$ And we would have to heat the magnesium salt VERY fiercely to get complete decarboxylation. $"Moles of carbon dioxide LOST"$ $=$ $(4.40*g)/(44.01*g*mol^-1)$ $=0.010*mol$ And therefore in...
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Zinc oxide reacts with hydrochloric acid to produce zinc chloride and dihydrogen monoxide. If 3.6 moles of zinc oxide reacts with an excess of hydrochloric acid, then how many grams of zinc chloride were produced?
The reaction happening in solution is the following: $ZnO(aq)+2HCl(aq)->ZnCl_2(aq)+H_2O(l)$ Since the hydrochloric acid ($HCl$) is in excess, therefore, the number of moles of Zinc oxide ($ZnO$) will determine the mass...
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Metallic magnesium reacts with steam to produce magnesium hydroxide and hydrogen gas. If 16.2 g of $Mg$ are heated with 12.0 g of $H_2O$, what is the limiting reactant?
Balanced equation of the reaction is $Mg+2H_2O->Mg(OH)_2+H_2 uarr$ Molar masses of in reactants of Magnesium: 24.3050 Atomic mass of Hydrogen: 1.00794 Atomic mass of Oxygen: 15.9994 Given 12...
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