How much heavier is an alpha particle than an electron?

Iknow the answer to 13 is b and 14 is d. i just need to know why the correct answers are correct

The reactions shown here can be combined to make the overall reaction c(s) + h2o(g) ⇌ co(g) + h2(g) by reversing some and/or dividing all the coefficients by a number. a. c(s) + o2(g) → co2(g) k=1.363×10^69 b. 2 h2(g) + o2(g) → 2 h2o(g) k=1.389×10^80 c. 2co(g) + o2 (g) → 2 co2(g) k=1.477×10^90

Amap that uses a range of colors and shading to represent the elevation, depth, or landscape of specific features on earth is a/an map.