H₂O 03 absence larger 0.0058 density 0.0063 composition presence smaller The partial pressure of CO2 in Mars's atmosphere is CO₂ in Earth's atmosphere is only 0.0004 atm. If CO₂ were the main greenhouse gas contributing to daily temperature variation, Mars, with more CO₂, would have a variation than Earth, not The presence of potent (g) in Earth's atmosphere is the main reason for our greenhouse gas overnight temperature variation. of the Mars atmosphere, with its atm. The partial pressure of Thus, the largest role in the wide daily temperature variation. of water vapor, plays the

Determine the concentrations of hydronium and hydroxide ions in 0.076733152673 M aqueous sodium hydroxide.Kw = 1.0E-14. a. Hydroxide ion concentration? b. Hydronium ion concentration?

The great French chemist Antoine Lavoisier discovered the Law of Conservation of Mass in part by doing a famous experiment in 1775. In this experiment Lavoisier found that mercury(II) oxide, when heated, decomposed into liquid mercury and an invisible and previously unknown substance: oxygen gas. 1. Write a balanced chemical equation, including physical state symbols, for the decomposition of solid mercury(II) oxide (HgO) into liquid mercury and gaseous dioxygen.   2. Suppose 53.0mL of dioxygen gas are produced by this reaction, at a temperature of 50.0°C and pressure of exactly 1atm. Calculate the mass of mercury(II) oxide that must have reacted. Be sure your answer has the correct number of significant digits.

1. Which of the following is not a step in preparing a water sample container?a. All sample containers must be dark in colorb. The type of sample container and the level of cleaning required depend on the type of sample to be takenc. All sample containers must be thoroughly cleaned in the laboratory before sampling is carried outd. The number of containers prepared must always be in excess of what is needed, for quality assurance, quality control and reserves 2. The purpose of environmental sample analysis is..a. To determine the origin and concentration of chemicals in the environmentb. To determine the origin, concentration of chemicals and/or pollutants in the environmentc. To determine the concentration of a chemical in the environmentd. To determine the cause and concentration of pollutants in the environment

For eac te, click the button under the better solvent. solute Which is the better solvent? :0: || :0: :0: CH,-S CH, НО -С — СH, — CH, — С — ОН CH;CH,OH CH; H C H

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The great French chemist Antoine Lavoisier discovered the Law of Conservation of Mass in part by doing a famous experiment in 1775. In this experiment Lavoisier found that mercury(II) oxide, when heated, decomposed into liquid mercury and an invisible and previously unknown substance: oxygen gas. 1. Write a balanced chemical equation, including physical state symbols, for the decomposition of solid mercury(II) oxide (HgO) into liquid mercury and gaseous dioxygen. 0 2. Suppose 62.0 mL of dioxygen gas are produced by this reaction, at temperature of 130.0 °C and pressure of exactly 1 atm. Calculate the mass of mercury(II) oxide that must have reacted. Round your answer to 3 significant digits. g 010 X 0x12

The great French chemist Antoine Lavoisier discovered the Law of Conservation of Mass in part by doing a famous experiment in 1775. In this experiment Lavoisier found that mercury(II) oxide, when heated, decomposed into liquid mercury and an invisible and previously unknown substance: oxygen gas. 1. Write a balanced chemical equation, including physical state symbols, for the decomposition of solid mercury(II) oxide (HgO) into liquid mercury and gaseous dioxygen. 2. Suppose 71.0 mL of dioxygen gas are produced by this reaction, at a temperature of 50.0 °C and pressure of exactly 1 atm. Calculate the mass of mercury(II) oxide that must have reacted. Be sure your answer has the correct number of significant digits.

EtO NaOEt, ELOH EtO,C- OEt a) b.) CI EtO HO ČI ÓEt ÓH d.) e)