Which of the following is true regarding mass relationships in a chemical reaction?
A) To determine mass relationships in a chemical reaction, you first need to know the balanced chemical equation for the reaction.
B) To convert from grams to moles and vice versa, you need to use molar mass as a conversion factor.
C) Both a and b are true.
D) Both a and b are false.
C
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According to the following reaction, which molecule is acting as a base? H2O + H2SO4 ?? H3O+ + HSO4-
A.
| H2SO4 |
B. H2O
C. H3O+
D. HSO4-
E. none of the above
The Schengen Agreement, signed in 1985, meant that
A) crossing a European border was not possible without government permission. B) crossing a European border required neither paperwork nor government approval. C) crossing a European was only available to people from countries that were EU members. D) crossing a European border became more difficult for the ethnic minority Roma. E) crossing a European border required passport and auto insurance documentation.
The percent of infants within a population that die before age one
A. Infant Mortality Rate B. Death Rate: C. Total Fertility Rate: D. Birth Rate:
The Green Revolution depends on several factors for success. What is NOT one of those?
A) machinery B) new seeds C) chemical fertilizers D) small-scale farming E) all of the above are factors needed to succeed