If a substance has a half life of 45 days, how much of the original substance would be left after 90 days?

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Compare atomic number, mass number, and atomic mass

Predict the conditions (high temperature, low temperature, all temperatures, or no temperatures) under which each of the following reactions will be spontaneous. a. H2O (g) →H2O (l) b. CO2 (s) →CO2 (g) c. H2 (g) →2H (g) d.

Which best describes a swimming pool? 1.) it is a solute 2.) it is a solvent 3.) it is a solution 4.) it is a reactant 5.) it is a product

When this equation is correctly balanced using smallest whole numbers, what is the coefficient of O2 (g)

Which of the following statements is true about both nuclear fusion and nuclear fission? They occur in the sun. Heavy atoms are split. Two light nuclei combine. Some mass changes into energy.

What does the name iron (II) in a compound indicate about the cation? A an 11 + charge B a 2 - charge C a 2 + charge

Examples of balanced decomposition reactions

A birthday balloon had a volume of 14.1 L when the gas inside was at a temperature of 13.9 °C. Assuming no gas escapes, what is its volume when the balloon warms up to 22.0 °C?

Which of the following is not an indication of a chemical change?