As the planetary distance from the sun increases and its orbital velocity
more time to complete an orbit.
the length of its orbital path
These result in the planet taking
increases, increases
increases, decreases
decreases, increases
decreases, decreases

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Mary is conducting an experiment on how pollution affects plant growth. how can she ensure that her data are reliable?

Read the chemical equation. 2c2h2 + 5o2 → 4co2 + 2h2o which of the following statements would be correct if one mole of c2h2 was used in this reaction? one mole of oxygen was used in this reaction. five moles of oxygen were used in this reaction. four moles of carbon dioxide were produced from this reaction. two moles of carbon dioxide were produced from this reaction.