Chemistry, 18.11.2020 21:20, plshelpme53

How many atoms are there in a sample of lead with a mass of 6.8 g?

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Chemistry, 21.06.2019 15:20, zymikaa00

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Chemistry, 21.06.2019 17:10, ladypink94

Abullet found at a crime scene may be used as evidence in a trial if the percentage of metals match to the composition of metals in a bullet from the suspect's ammunition. a forensic scientist's analysis of the bullet shows that it contains 11.9 g of lead, 0.5 g of tin, and 0.8 b of antimony. what is the percentage of lead metal in the bullet? express your answers to the one's place.

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Chemistry, 22.06.2019 11:00, 1060975

The number to the right of an element's symbol (ex. c-12) identifies the of an isotope.

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Chemistry, 22.06.2019 12:20, tenleywood

The yearly amounts of carbon emissions from cars in belgium are normally distributed with a mean of 13.9 gigagrams per year and a standard deviation of 5.8 gigagrams per year. find the probability that the amount of carbon emissions from cars in belgium for a randomly selected year are between 11.5 gigagrams and 14.0 gigagrams per year. a. 0.340 b. 0.660 c. 0.167 d. 0.397