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

How could you decide whether a ring was 24-karat gold or 14-karat gold without damaging the ring?

Solution A is 0.44 M and reacts with 0.11 M of solution B. Assume that the value of x is 0, the value of y is 1, and r is 1.07 * 10⁻¹ / s. Find the rate constant for this reaction.

Which of these best explains why a paper clip can float on water? select one: a. water has a very high specific heat. b. water molecules at the surface experience fewer hydrogen bonds than water molecules within the liquid. c.

At 1.75 atm, a sample of gas takes up 3.78L. If the pressure in the gas is increased to 2.25 atm, what will the new volume be?

What does lead do to animal cells

If a sample of gas occupies 400 ml at a pressure of 800 mm Hg, what will be it's volume if the pressure is reduced to 700 mm Hg

Why are water storage tanks usually built on towers or hilltops?

What is convection cell

One example of a decomposition reaction is the electrolysis of water. the chemical reaction can be expressed by the equation 2 h2o →2 h2 o2. the reactant (s) of this chemical reaction is/are?

When the positive ion of one compound replaces the positive ion of another compound?