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A chemical compound requires 8 ounces of Chemical A and 12 ounces of Chemical B. A mixture contains 24 ounces of Chemical A and 30 ounces of Chemical B. How can you fix the mixture to make the chemical compound?
Since 8x3=24 and since 12x3=36 you need to add 6oz of chemical B to have 24oz of chemical A and 36oz of chemical B. Take 1/3 of the total mixture...
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State the difference between a physical change and a chemical change, and list three indications that a chemical change has occurred. Which indication is most suggestive of a chemical reaction?
Physical changes are changes in the formation or state of molecules and atoms. The arrangement of the molecules and atoms is different after the change but the chemical composition of...
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If a molecule of carbon dioxide is involved in a chemical reaction, how is it represented in the chemical equation for the reaction?
Now, of course, as chemists we deal with molar quantities, and the oxidation reaction must involve a series of complex elementary steps, but here the molecule is simply represented as...
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What is a balanced chemical equation? How would you use the law of conservation of mass to explain why a chemical equation must be balanced?
Conservation of mass means that if I start with 10 g of reactant, from all sources, at MOST I can get 10 g of product. In practice, I am not...
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Ammonium chloride and sodium oxide are mixed in a boiling tube and then heated.
Write balanced equation based on the chemical reaction described. State the chemical test if necessary?
$2NH_4Cl + Na_2O(s) rarr 2NaCl(s)+2NH_3(g)uarr +H_2O(l)$ This is simply an acid base reaction.......i.e. $O^(2-) + 2H^+ rarr H_2O(l)$ Ammonium is the carrier for the acidium ion, $H^+$..... And the...
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The following chemical equation is not balanced: $Fe_2O_3 + H_2SO_4 -> Fe_2(SO_4)_3 + H_2O$. When this chemical equation is correctly balanced, what is the coefficient of the water molecule?
Water has a $3$ coeeficient. Is the equation stoichiometrically balanced? If not, then it should be. The oxide ion is dibasic, and reacts with 2 equiv $H^+$ to give the...
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In the chemical equation for photosynthesis, carbon dioxide and water are converted to glucose and oxygen. $6CO_2 + 6H_2O -> C_6H_12O_6 + 6O_2$. What component could be added to complete this chemical equation?
We KNOW that we burn carbohydrates, sugars, as a source of chemical energy...this is what happens to the sugar we put on our cornflakes this morning. The energy has to...
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A chemical reaction is a process that changes some chemical substances into others. What is involved in the process of forming these new chemical substances?
Chemical change is characterized by the formation of new substances, and the making and breaking of strong chemical bonds. Usually this is signalled by a colour change, though some few...
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How would you write a balanced chemical equation for the neutralization of sulfuric acid with potassium hydroxide? What is the name and chemical formula of the salt formed in this reaction?
This is because potassium has a valency of just 1+ and, since sulphate ions have a valency of 2-, two potassium ions are required per sulphate ion in order for...
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Grams of $N_2$ reacts with 84.29 grams of $H_2$ in the chemical equation: $N_2 + H_2-> NH_3$ How do you balance the chemical equation and determine the limiting reactant? How much $NH_3$ is produced?
Three equiv of hydrogen react with 1 equiv of nitrogen to give one equiv ammonia. Of course, I could double this reaction to remove the 1/2 coefficients, but the will...
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