SOLUTION: which set the ratios should be used to find the mass of potassuim (K) in 455 grams of KCN? A. K/455=39/65 B. K/39=12/65 C. K/455=65/39 D. 39/KCN=14/455

Question 1069009: which set the ratios should be used to find the mass of potassuim (K) in 455 grams of KCN?
A. K/455=39/65
B. K/39=12/65
C. K/455=65/39
D. 39/KCN=14/455
Answer by Boreal(15235) (Show Source): You can put this solution on YOUR website!
Weight of K is to the whole weight has the MW of K is to the whole MW.
That would be A
39 x455=65K
divide by 65 both sides
39 x 7 is K.
KCN has MW of 65
455 gms is 7 x 65
Therefore, the mass of potassium is 7x39.

RELATED QUESTIONS
f(x) = x^3 + (1 - k^2)x + k (a) Show that -k is a root of f. I've already solved this (answered by jsmallt9)

Which of the following pairs of equations has no solution? (answered by stanbon)

Please help me with this question! Given the function k described by K(x) = 3x, find... (answered by jim_thompson5910)

The problem says to solve the trinomial equation k^2+8k=84. The answers are A) k=-12, k=7 (answered by faceoff57)

Find the Value of K K.......3+K.........-10 1-K......2-K......... 5 = 48 2... (answered by Edwin McCravy)

If each of the fractions 3/k, 4/k, 5/k is in lowest terms, which of the following could... (answered by rapaljer)

Which one of the following temperatures is equal to 5�C? A. 0 K B. 41 K C. 278 K (answered by drk)

If the train continues at the same rate, which proportion can be used to find the... (answered by Alan3354)