The middle or center of the atom is called the

If a 10.0 g mass of aluminum increases from 20.0 °C to 35.0 °C, how much heat was required? (0.903 J/g°C)

Which of the following is a compound? Select one: a. Cl2 b. H2O c. He d. H2

At 25 °c only 0.0470 mol of the generic salt ab3 is soluble in 1.00 l of water. what is the ksp of the salt at 25 °c?

The mass number of an atom is equal to which of the following? Question 4 options: A. the number of protons plus the number of electrons in an atom B. the number of electrons circling the nucleus of an atom C.

Zn2s + 4 AgNO3ag - > 2 Zn (NO3) 2ag + 4 Ags What amount (in moles) of silver nitrate will react with excess zinc to produce 100.0 g of silver metal? Determine the mass of zinc nitrate that will be produced by 64.50 moles of zinc metal.

Which of the following types of electromagnetic waves has a frequency greater than ultraviolet waves? A) X rays B) infrared waves C) microwaves D) visible light

For each metal complex give the coordination number for the metal species. m (nh34cl2

Particles in a liquid move around just as freely as particles in a solid. True or False

How did aristotles idea of matter differ from that of scientists

How does ease of oxidation correlate with activity? Do highly active metals tend to donate electrons or accept electrons from other metals?