Which of the following is always true about radioisotopes?

A) They have unstable nuclei.

B) Their neutron-to-proton ratio is 1:1.

C) Their decay products are stable isotopes.

D) all of the above

The answer is A, I just passed my test.

The enthalpy of combustion for octane (C8H18 (l)), a key component of gasoline, is - 5,074 kJ/mol. This value is the Hrxn for which of the following reactions? A - 2C8H18 (l) + 25O2 (g) 16CO2 (g) + 18H2O (g) B - C8H18 (l) + 12.

What are the types of solution systems chemistry?

A gas has a pressure of 1.00 atm and a volume of 500 mL. When its pressure is doubled, at constant temperature, to 2.00 atm, its volume halves to 250 mL, following Boyle's Law.

How many valence electrons does aluminum oxide have

What system of units is used by only a small number of countries in the world, including the U. S.?

What happens to the velocity of a sound wave in air if the temperature of the air increases

What word cannot be used to describe this organism?

Indicate the mechanistic symbol (SN1, SN2) that is most consistent with the following statement. Select the single best answer. The substitution product obtained by the solvolysis of tert-butyl iodide in methanol arises by this mechanism

What will happen if we burn carbon monoxide In a closed room?

What elements does silver have.