law a: it always remains unchanged under the same conditions
Chemistry, 05.09.2019 16:20 tiffcarina69
Two laws are described below:
law a: it always remains unchanged under the same conditions
law b: describes a natural phenomenon
based on these characteristics, what can you conclude about law a and law b?
1. both law a and law b are societal laws.
2. both law a and law b are scientific laws.
3. law a is a scientific law and law b is a societal law.
4. law a is a societal law and law b is a scientific law.
Answers: 1
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Calculate the number of molecules present in 0.750 mol of mgo.
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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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Chlorophyll a had the molecular formula c55h72mgn4o5 how many atoms are in this molecule
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Given the data below for the reaction, 2 a + 2 b + 4 c => d + e + 3 f, the reaction is fill in the [ ] order in a, fill in the [ ] order in b, fill in the [ ] order in c and fill in the [ ] order overall. (use the words "first, second, third, fourth" to fill each blank)experimentinitial conc of a, mol/l initial conc of b, mol/l initial conc of c, mol/l initial rate, mol/l.s1 0.1 0.1 0.2 2 x 10-32 0.2 0.3 0.2 6 x 10-33 0.3 0.1 0.2 2 x 10-34 0.4 0.3 0.4 1.2 x 10-2
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Two laws are described below:
law a: it always remains unchanged under the same conditions
law a: it always remains unchanged under the same conditions
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