What combination of factors can change dry ice into a liquid

When dry ice is heated, it rapidly forms carbon dioxide gas. This gas is fairly cold. So when the cold CO2 gas is released, it causes water vapor in the air to condense. You see this condensed water.

1. a)c-14 has two more protons

2. d)they have different numbers of protons, neutrons, and valence electrons; they are all gases at room temperature.

3. c) iron and nickel.

i think its 100

i hope this !