The atomic and mass numbers for four different atoms are given below. Which two are isotopes?

Atom Atomic# Mass#

W 50 117

X 50 119

Y 51 119

Z 52 117

Devise a way to separate sand from a mixture of charcoal, sand, sugar, and water

Which statement describes an arrhenius acid? it produces OH - in a solution it produces H + in solution it accepts protons it donates protons it donates electrons

Which isotope is used to date ancient artifacts such as fossils?

Which would be the nobel gas preceding Tin? A. Neon [Ne] B. Argon [Ar] C. Krypton [Kr] D. Xenon [Xe]

Which of the following naturally orccuing radioisotopes would be most useful in dating objects

The mass of a solid copper penny is 3.46 g. how many copper atoms are in the penny?

Consider a situation in which 211 g g of P4 P 4 are exposed to 240 g g of O2 O 2 . What is the maximum amount in moles of P2O5 P 2 O 5 that can theoretically be made from 211 g g of P4 P 4 and excess oxygen?

What is the total pressure when 0.400 g of H2, 2.00 g of N2, and 10.5 g of CO2 are injected into a 10.0 liter flask at 273 K?

The balanced chemical equation for the combustion of methane is: CH4 (g) + 2 O2 (g) → CO2 (g) + 2 H2O (g) Which of the following statements concerning this chemical equation is/are correct? 1.

In one kind of nuclear reaction, two nuclei fuse, or join together, to form a larger nucleus. This kind of reaction happens only at very high pressures. Explain why such high pressures are necessary to cause these reactions to occur.