The answer is Strontium Nitride
Based on the balanced chemical reaction presented above, every mole of magnesium (Mg) yields one mole of diatomic hydrogen (H2). When converted to masses, every 24.3 grams of magnesium yields 2 grams of hydrogen.
From the given, there are 20 grams of magnesium available for the reaction. With this amount, the expected yield of hydrogen is 1.646 grams. To calculate the percent yield, divide the actual yield to the hypothetical yield.
*The case is impossible because the actual yield is greater than the theoretical yield.
If we assume that there had been a typographical error and that the actual yield is 0.7 grams instead of 1.7 grams, the percent yield becomes 42.5%. Thus, the answer is letter E.
freezing and condensation
Explanation:
The motion of the atoms decreases during freezing and condensation. These are phase changes that increases the molecular attraction between particles and forces them to come closer.
Freezing is a phase change from liquid to solid. It is usually achieved by removing heat from a substance and cooling it.
Condensation is a phase change from gases to liquid. .
Gases have the greatest motion because they have little to no attractive forces between them.
Phase changes from gas to solid to liquid generally reduces the motion of the atoms.
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Phase change brainly.com/question/1875234
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Answer:d.break them down to monosaccharides
Explanation:
Polysaccharides are polymers made of monosaccharide monomers. The polysaccharides do not release energy except the monosacharides are broken down to monosaccharides by stepwise hydrolysis. To obtain energy from polysaccharides, the constituent monosacharides are obtained and these are now involved in the biological cycles that liberate energy.