99 points pls
what chemical reaction does this equation represent?
2kcl + pb(no3)2 --...
99 points pls
what chemical reaction does this equation represent?
2kcl + pb(no3)2 --> 2kno3 + pbcl2
a: two molecules of potassium nitrate and one molecule of lead chloride react to form one molecule of lead nitrate and two molecules of potassium chloride.
b: one molecule of potassium nitrate and one molecule of lead chloride react to form one molecule of lead nitrate and one molecule of potassium chloride.
c: two molecules of potassium chloride react with two molecules of lead nitrate to form one molecule of potassium nitrate and two molecules of lead chloride.
d: two molecules of potassium chloride react with one molecule of lead nitrate to form two molecules of potassium nitrate and one molecule of lead chloride.
Answers: 3
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Nebulae are enormous clouds in outer space. they are made mostly of hydrogen gas, helium gas, and dust. some nebulae glow brightly, while others do not. the stars that people see are huge, bright balls of glowing gas. they are made mostly of hydrogen and helium. which statement correctly describes other ways in which nebulae and stars are different? a. stars can form inside a nebula but a nebula can never be produced by any star. b. a star always has a higher density than a nebula. c. stars can never form inside a nebula but a nebula can be produced by any star. d. a nebula always has a higher density than a star.
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The number of moles of a given mass of a substance can be found without knowing its molecular formula or molar mass. true false
Answers: 1
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