Look here: http://wiki.answers.com/Q/How_many_grams_are_in_a_tablespoon
Brief run down of the answer there:
Grams measure mass (or weight)
Tablespoons measure volume.
A tablespoon of feathers weighs less than a tablespoon of lead, but they take up the same amount of space.
A gram of feathers weighs the same as a gram of lead, but they take up different amounts of space
145 grams is 10.229 tablespoons
50 grams of water is about 3.3 tablespoons
28g
There are 15 grams of water in 1 tablespoon. 15 tablespoons is 225 grams
1 tablespoon = 15 grams therefore a little less than 2.5 tablespoons = 35 grams
25 grams is 1.6666666666675 tablespoons.
Is and are in one sentence
That is about 1 tablespoon.
Depends what powder
That is approximately 45 grams of butter which is 3 tablespoons.
This cannot be determined because tablespoons/teaspoons are measures of volume and grams is a measure of weight or mass.
Tablespoon of WHAT? Grams are a measure of weight, tablespoons a measure of volume. One does not translate to the other.