If you have 10 grams of a substance Tha. t decays with a half-life of 14 days, then how much will you have after 42 days?

3.13g

6.25g

1.25g

2.50g

How do you dispose of an unknown chemical

What is the mass in grams of 7.23 miles of dinitrogen trioxide?

How many covalent bonds are there in a molecule of cyclohexane?

Is vinegar considered as 2 substances already?

Predict the compound in the following pair that will undergoes solvolysis (in aqueous ethanol) more rapidly.

What is an example of making a qualified observation

With respect to composition, how is the compound made from hydrogen and oxygen different from mixtures of these two elements?

How should scientist respond when new evidence that challenges current is presented?

Consider the following reaction, equilibrium concentrations, and equilibrium constant at a particular temperature. Determine the equilibrium pressure of H2. D2 (g) + H2 (g) ⇌ 2 HD (g) Kp = 1.80 P (D2) eq = 1.1 * 10-3 atm P (HD) eq = 2.7 * 10-3 atm

Find δe for the change in state of 1.0 molh2o (l) at 79 ∘c to h2o (g) at 116 ∘c. the heat capacity of h2o (l) = 75.3 j/molk, heat capacity of h2o (g) = 25.0 j/molk, and the heat of vaporization of h2o is 40.7*103j/mol at 100 ∘c.