5. The first method of determining the chemical composition of substances in space was to
A analyze rocks brought back from the moon
B capture data returned by robotic vehicles
C analyze starlight transmitted to Earth
D record radar data from satellites

In the reaction between a crushed antacid tablet and vinegar what gas is emitted

8.98 dm3 of hydrogen gas is collected at 38.8 °c. find the volume the gas will occupy at -39.9 °c if the pressure remains constant.

Choose an equation that represents an enzyme-catalyzed reaction. (a) enzyme + substrate → enzyme-substrate complex (b) enzyme + substrate ←−→ enzyme + products (c) enzyme + substrate ←−→ enzyme-substrate complex → enzyme + products (d) enzyme + substrate ←−→ enzyme-substrate complex → enzyme-substrate complex + products