Which of the following was most likely not present in creating the amino acids of early Earth's waters of the past? A:Nitrogen B:Sulfur C:Hydrogen D:Ammonia

Which of the following requires the most input of energy? A. melting a substance B. raising the temperature of the substance by 1° C C. decreasing the temperature of the substance by 1° C D. vaporizing a substance

If the mass of a liquid reactant is 10g and the mass of a powder reactant is 5g then what should the mass of the product be according to the law of conservation mass

Asmall metal bar, whose initial temperature was 20°C, is dropped into a large container of boiling water.

What is the density of 10.2 mL of corn syrup that has a mass of 10.00 g?

Q#1.) According to newton second law of motion, if we have a rigid body of uncharged mass is observed acceleration, what must be happening? A. a force was once applied but is now not being applied. B. a force is being applied to the mass. C.

Which observation provided Albert Einstein the clue that he needed to explain the photoelectric effect

Which of the followings represents a negatively charged ion

Why do you think plant fossils are less common than body fossils?

Why are valence electrons important?

A woman carriers her 100-newton child for a distance of 50 meters to the child's bedroom. How much work does the woman do?