Q: Nitric acid, HNO3, can be produced by reacting high-
Nitric acid, HNO3, can be produced by reacting high-pressure ammonia gas with oxygen gas at around 750 °C in the presence of a platinum catalyst. Water is a by-product of the reaction. Write the unbal...
See AnswerQ: When balancing chemical equations, beginning students are often tempted to change
When balancing chemical equations, beginning students are often tempted to change the numbers within a formula (the subscripts) to balance the equation. Why is this never permitted? What effect does c...
See AnswerQ: The “Chemistry in Focus” segment The Beetle That Shoots Straight
The “Chemistry in Focus” segment The Beetle That Shoots Straight discusses the bombardier beetle and the chemical reaction of the decomposition of hydrogen peroxide. H2O2 (aq)...
See AnswerQ: Balance the equation for the reaction of potassium with water.
Balance the equation for the reaction of potassium with water. K(s) + H2O(l) H2(g) + KOH(aq)
See AnswerQ: Although this is no longer generally recommended, in the past,
Although this is no longer generally recommended, in the past, small cuts and abrasions on the skin were frequently cleaned using hydrogen peroxide solution. What evidence is there that treating a wou...
See AnswerQ: In each of the following, identify which names are incorrect for
In each of the following, identify which names are incorrect for the given formulas, and give the correct name. a. CuCl2, copper(I) chloride b. Ag2O, silver oxide c. Li2O, lithium oxide d. CaS, ca...
See AnswerQ: Acetylene gas, C2H2, is used in welding because it generates
Acetylene gas, C2H2, is used in welding because it generates an extremely hot flame when it is combusted with oxygen. The heat generated is sufficient to melt the metals being welded together. Carbon...
See AnswerQ: When balancing a chemical equation, which of the following statements is
When balancing a chemical equation, which of the following statements is false? a. Subscripts in the reactants must be conserved in the products. b. Coefficients are used to balance the atoms on bot...
See AnswerQ: Crude gunpowders often contain a mixture of potassium nitrate and charcoal (
Crude gunpowders often contain a mixture of potassium nitrate and charcoal (carbon). When such a mixture is heated until reaction occurs, a solid residue of potassium carbonate is produced. The explos...
See AnswerQ: The following demonstration takes place in a two-step process:
The following demonstration takes place in a two-step process: First, solid calcium carbide (CaC2) reacts with liquid water to produce acetylene gas (C2H2) and aqueous calcium hydroxide. Second, the a...
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