Chemistry, 04.10.2019 22:10 shadow29916
Identify the true statement.
a. of the silicate minerals, those with the most silicon-oxygen bonds weather faster since chemical reactions happen at the atomic bonding level.
b. the silicate minerals that cool at the lowest temperatures are the first to weather.
c. minerals containing iron, sodium, and potassium are more resistant to weathering.
d. in a granite containing quartz, mica, and feldspar, everything weathers to clay except the quartz.
Answers: 1
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Modern pennies are composed of zinc coated with copper. a student determines the mass of a penny to be 2.482 g and then makes several scratches in the copper coaling (to expose the underlying zinc). the student puts the scratched penny in hydrochloric acid, where the following reaction occurs between the zinc and the hcl (the copper remains undissolved): zn(s) + 2 hcl(aq) → h2(g) + zncl(aq)the student collects the hydrogen produced over water at 25 °c. the collected gas occupies a volume of 0.899 l at a total pressure of 79 j mmhg. calculate the percent zinc (by mass) in the penny. (assume that all the zn in the penny dissolves.)
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Chemistry, 22.06.2019 12:30
Sodium sulfate dissolves as follows: na2so4(s) → 2na+(aq) + so42- (aq). how many moles of na2so4 are required to make 1.0 l of solution in which the na concentration is 0.10 m?
Answers: 2
Identify the true statement.
a. of the silicate minerals, those with the most silicon-oxygen...
a. of the silicate minerals, those with the most silicon-oxygen...
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