Answer:
2.5055 x 10^24
Step-by-step explanation:
312 grams = 6.023 x 10^23 particles
75. grams= m particles
CROSS MULTIPLY
312m=75 x 6.023 x 10^23
m=(312/75) x 6.023 x 10^23
m=25.055 x 10^23
m=2.5055 x 10^24
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