What is the charge of an ion that contains 21 protons and 19 electrons?

What does dehydration of alcohol produce?

1. Which of these show a diatomic element? CO H₂ He SO₂ 2. Which of these substances is an element? Chlorine Ice Methane Sodium chloride 3. When the elements lead and bromine combine together, the name of the substance formed is called ...

Why does the nitrogen concentration decrease after hydrogen is added? n2 (g) + 3h2 (g) ⇌2nh3 (g) why does the nitrogen concentration decrease after hydrogen is added?

Describe the components of an air solution using the terms "solute" and "solvent."

Select the term that completes each statement. When acetic acid is dissolved in water to make vinegar, acetic acid is the. When a small amount of carbon is dissolved in iron to make steel, the iron is the.

Question 6 if a gas pressure gauge reads 32.0 psi, what is the pressure in inches of mercury? 165 in. hg 15.7 in. hg 65.1 in. hg 32.0 in. hg 6.19 in. hg

A line in the Brackett series of hydrogen has a wavelength of 1945 nm. From what state did the electron originate?

Convert 4.5 hours to seconds

Gasoline catches on fire is it flammability?

Enzymes are proteins that speed up chemical reactions in the body how do they work A. they increase the surface area of reactants B. they increase the concentration of reactants C. they decrease the concentration of products D. They act as reactants