Which of the following statements is true? a
Igneous rock forms when metamorphic rock is exposed to heat and pressure.
b
Igneous rock forms when sedimentary rock melts and then cools and hardens.
c
Metamorphic rock forms when igneous rock melts and then cools and hardens.
d
Sedimentary rock forms when igneous rock is exposed to heat and pressure

At 450 mm hg a gas has a volume of 760 l, what is its volume at standard pressure

20 pts ‼️ an unmanned spacecraft travels to mars. mars has a lower strength of gravity than earth. where in the image is the spacecraft’s weight the greatest?

Given the data below for the reaction, 2 a + 2 b + 4 c => d + e + 3 f, the reaction is fill in the [ ] order in a, fill in the [ ] order in b, fill in the [ ] order in c and fill in the [ ] order overall. (use the words "first, second, third, fourth" to fill each blank)experimentinitial conc of a, mol/l initial conc of b, mol/l initial conc of c, mol/l initial rate, mol/l. s1 0.1 0.1 0.2 2 x 10-32 0.2 0.3 0.2 6 x 10-33 0.3 0.1 0.2 2 x 10-34 0.4 0.3 0.4 1.2 x 10-2