If a small amount of zinc remains at the conclusion of a reaction between zinc and hydrochloric acid, which reactant is in excess? A. zinc B. neither C. hydrochloric acid D. can't tell

Which scientist came up with the first widely recognized atomic theory

7. Citric acid contains 37.5 g C, 58.3 g 0, and 4.2 g H and the MW = 192, what is the molecular formula?

Mineral formation caused by high pressures and high temperatures would most likely occur in which of the following environments

Branliest to correct answer What evidence is there that work is being done? A) A lever is being used. B) A simple machine makes a task easier. C) The rock has a larger force than the boy. D) The boy uses force to move the rock a distance.

Assume you inhale in about 6 L of air per minute how much nitrogen do you breathe in one minute

Based on its location on the periodic table, which element (s) have properties similar to N? Choose all that apply. * P C O Bi

What conclusion can be drawn from the statement that an element has low electron affinity, low electronegativity, and a low ionization energy?

A scientist performs an experiment in which a radium-226 (Ra-226) atom decays into radon-222 (Rn-222). The scientist concludes that some energy must have been added to the system to cause this reaction to begin.

Which suitable method can be used to separate a mixture of sand and paraffin

How many vowels does the word love have