In the reaction: $A + B \to C$ $A + B -> C$ , if 4.2 grams of A react to make 6.8 grams of C, then how many grams of B were reacted?

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Answer 1 · 2017-01-25T16:42:03

The mass of $B$ $"B"$ reacted was 2.6 g.

We can use the Law of Conservation of Mass to solve the problem.

$underbrace("A")_color(red)("4.2 g") + underbrace("B")_color(red)(x) → underbrace("C")_color(red)("6.8 g")$

$"4.2 g"color(white)(l) + x = "6.8 g"$

$x = "6.8 g - 4.2 g" = "2.6 g"$

In the reaction: A + B -> CA+B→CA + B -> C, if 4.2 grams of A react to make 6.8 grams of C, then how many grams of B were reacted?