If something has an atomic number of 13 and an atomic mass of 26.98 how many protons does It have

A gas obeys the ideal-gas equation of state P V = N k T, where N = n NA is the number of molecules in the volume V at pressure P and temperature T and n is the number of gm-moles of the gas.

Which of the following choices represents a balanced chemical equation? A. Ca3 (PO4) 2 + 6SiO2 → P4O10 + 3CaSiO3 B. 2Ca3 (PO4) 2 + 6SiO2 → P4O10 + 6CaSiO3 C. 2Ca3 (PO4) 2 + 3SiO2 → 2P4O10 + 2CaSiO3 D. 3Ca3 (PO4) 2 + 2SiO2 → P4O10 + 4CaSiO3

Would the N=O bond in HNO2 be longer, shorter, or the same length as the N-O bonds in NO2-?

Which has a stronger attraction between particles water or methane?

What does a triple beam balance measure?

Consider the polymerization of styrene in toluene at 60°C initiated by di-t-butylperoxide for a solution containing 0.04 mol of initiator and 2 mol of monomer per liter. The initial rates of initiation, Ri, and propagation, RP, are found to be 1.

Which of the dollowing isotopes have 8 neutrons in the nucleus? 0-15 0-17 C13 O C14

Click the DeltaH is an Extensive Property button within the activity, and analyze the relationship between the two reactions that are displayed.

The fundamental unit used to measure mass is?

What are some ways population size is limited within an ecosystem?