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Potassium (k) has a charge of +1, and sulfur has a charge of –2. which best describes the compound they make?
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Coal combustion produces which of the following waste products? i. tar ii. methane iii. electricity i only ii only i and ii ii and iii i, ii, and iii
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Which of these is a disadvantage of hydrogen fuel cells? a. engines that use hydrogen fuel are more efficient than gasoline-powered engines. b. the only emission produced by hydrogen fuel cells is water. c. hydrogen fuel is continually available and useful for heating. d. hydrogen fuel is often purified in a process that emits lots of greenhouse gases.
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Potassium (k) has a charge of +1, and sulfur has a charge of –2. which best describes the compound t...
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