Using scientific notation, convert: 5.29 km to m 1.21 ns to s 2.50 cm to m 5.58 ug to g

a)  5.29 km =

b) 1.29 ns =

c) 2.50 cm=

c)

Explanation:

Scientific notation : It is defined as the method or a way or representation of expressing the given number which are too big or too small that is written in the decimal form. That means, it always written in the power of 10 form.

8000 is written as,

a)  1 km = 1000 m

5.29 km =

b) 1 ns =

1.29 ns =

c)

2.50 cm=

d)

calculate how many grams of ammonia can be produced from 4.21 grams of

n2 + 3h2 = 2nh3

my answer:

25.0g n2 x (1 mol/ 28.0gn2) x (2 mol nh3/ 1 mol n2) x (17.0g nh3/ 1 molnh3) = 30.36g n2

25.0g h2 x (1 mol h2/ 2.00g h2) x (2 mol nh3/ 3 mol h2) x (17.0g nh3/ 1 mol nh3) = 141.67g h2

lr = n2

a corroding iron, if that's one of your choices