In the chemical equation Zn + 2HCL → ZnCl2 + H2, the reactants are

a. zinc chloride and hydrogen.

b. zinc and hydrochloric acid.

c. zinc and hydrogen carbonate.

d. zinc chlorate and water

Which of the following answers best describes how velocity and acceleration are related? Question 18 options: Acceleration is another word for velocity. Velocity is the rate of change in acceleration.

A direct relationship can be represented by: A) y/x=k B) x*y=k C) a curve D) a pie chart

Is dissolving a solid a physical or chemical change

Carla did an experiment by placing a piece of smooth, clear glass and a piece of smooth, black stone under a lamp for twenty minutes. which prediction will most likely be supported by carla's experimental results?

What is the mass of 1.70 mol of carbon-12? A) 20.4g B) 12.0g C) 7.06g D) 0.140g

Calcium (atomic number 20) has electron configuration 1s2,2s2,2p6,3s2,3p6,4s2. The atomic number of scandium is 21. Which orbital does the 21st electron enter? a. 3d b. 4p c. 4d d. 4f

In these solutions, identify the solute and the solvent Sea water, a solution composed of a variety of salts dissolved in water. The salt is the Soda water, a solution composed of carbon dioxide gas dissolved in water.

What is an Element and how it different from a Atom?

4 HCI + O2 - > 2 H2O + 2 CH2 How many moles of H2O can be produced from 30. moles of HCI?

How many molecules of nitrogen gas are in 22.4 L? A. 6.022 * 10^22 B. 6.022 * 10^23 C. 6.022 * 10^24 D. 6.022 * 10^25