An atom has 5 protons and 7 neutrons. What is its mass number?

What scientist determined that atomic mass did not determine the pattern of the periodic table? A. James Watson B. Henry Moseley C. Rosalind Franklin D. Dmitri Mendeleev

Calculate the number of moles of solute present in 185.0 mL of a 1.50 mol/L solution of HCl.

What is the potential of a cell made up of zn / zn2 + and cu / cu2 + half-cells at 25°c if [zn2+] = 0.31 m and [cu2+] = 0.81 m?

What conditions occurs as a solid melts?

Which of the following methods would best separate sand and water? boiling filtering decanting distilling

What type of radiation wave from the Sun does this graphic display? answer choices: x rays microwave visible ray infrared ray

What is the charge associated with each side of the HCl molecule?

Neon is a gas made up of one type of atom. Which term best describes neon? A) molecule B) element C) compound D) mixture

When the liquid is poured through a fliter,

A student went to the dentist and found out that he had a cavity. He always brushes his teeth twice a day, so he didn't understand how he got a cavity.