Who said, "Nature fears of empty space"?

Calculate the number of kilojoules to warm 125 g of iron from 23.5°c to 78.0°c.

What element has similar physical and chemical properties as boron.

Which is true concerning the products and reactants of photosynthesis and cellular respiration? a. the products of photosynthesis are sugars and the reactants of cellular respiration are starches. b. the products of photosynthesis are reactants in cellular respiration. c. oxygen is needed for photosynthesis and is given off in cellular respiration.