An atom has a mass number of 25 and 13 neutrons. what is the atomic number of this atom? express your answer as an integer.

The greatest distance between Earth and the Sun during Earth's revolution is 152 kilometers. What is the distance in megameters?

How many grams of N2 are required to produce 100.0 L of NH3 at STP? 6.25 g

State, in terms of the arrangement of atoms, the difference in hardness between diamond and graphite.

In poor quality fireworks what will you notice and why

Compared to a 1.0-mole sample of NaCl (s), a 1.0-mole sample of NaCl (l) has a different number of (1) ions (2) empirical formula (3) gram-formula mass (4) electrical conductivity

When metals react with nonmetals, an ionic compound generally results. what is the predicted general formula?

Why could the Bohr model not predict line spectra for atoms other than hydrogen?

Cryolite, Na3AlF6 (s), an ore used in the production of aluminum, can be synthesized using aluminum oxide. Balance the equation. 1.) Balance the equation - AlO3 (s) + NaOH (l) + HF (g) - ->Na3AlF6+H2O (g) 2.) If 17.5 kilograms of Al2O3 (s), 51.

The volume, in liters, of 538 g of CO2

What are two types of cold air masses that influence the weather in North America? Name them and describe their humidity.