Understanding atoms elements and compounds

When balanced, which equations would have the coefficient 3 in front of the first set of atoms? Check all that apply.

Technetium-99m, a "metastable" nuclide of Tc is produced by the reaction ? → 99mTc + β What is the starting nuclide? 1. 100Mo 2. 100Tc 3. 100Ru 4. 99Mo 5. 99Ru 6. 99Tc

When an atom loses one or more electrons, this atom becomes a (1) positive ion with a radius smaller than the radius of this atom (2) positive ion with a radius larger than the radius of this atom (3) negative ion with a radius smaller than the

How many atoms of hydrogen are there in 3.0kg of ethane

Classify lead: Select one: C = compound HE = heterogeneous mixture S = homogeneous mixture/solution E = element

What is 19 hundred thousandths in scientific notation

There state of matter that keeps its shape and volume when it is placed in a container

Our body solution tests at a pH of about 6.8. This pH is:

A diatomic gas has the molar mass of 38.00g/mol. what is the possible formula?

Which of the following is the final concentration of KCl if 500 ml of 0.25 M KCl is diluted to a final volume of 5 L? 0.025 L 0.0025 L 25 L 2.5 L