HELOOPP Which chemical equation models a synthesis reaction? (will mark brainliest)

A. CO2 → C +O2

B.
2Na + MgCl2 → 2NaCl _ Mg

0C.
HCl + LiOH → LiCl + H2O

D.
H2O + CO2 → H2CO3

What determines the average kinetic energy of the particles in a gas? a. the number of collisions b. the number of particles c. the size of the particles d. the temperature

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?

Scientists often have to deal with numbers that are either very large or very small. for example, the radius of the sun is approximately 696,000 kilometers, while bacterial cells are as small as 1.9 × 10-4 millimeters. express each number in an alternate form.