The table below gives the numbers of protons, electrons, and neutrons in four atoms. Atom
1
Number of protons
9
19
Number of neutrons
18
19
2.
13
4
Number of electrons
9
18
110
9
19
19
19
(10
Based on the table, which atom has a charge of -1?
O 1
02
3
O4

When 225mg of anthracene, c14h10(s), was burned in a bomb calorimeter the temperature rose by 1.75k. calculate the calorimeter constant. by how much will the temperature rise when 125mg of phenol, c6h5oh(s), is burned in the calorimeter under the same conditions? (δch< (c14h10,s)=–7061 kj mol−1.)

If 1.8 l of water is added to 2.5l of a 7.0 m koh solution, what is the molarity of the new solution

Ammonium perchlorate nh4clo4 is the solid rocket fuel used by the u.s. space shuttle. it reacts with itself to produce nitrogen gas n2 , chlorine gas cl2 , oxygen gas o2 , water h2o , and a great deal of energy. what mass of nitrogen gas is produced by the reaction of 2.1g of ammonium perchlorate?