An empty crucible weighs 12.437 2 g and the same crucible containing a precipitate from a gravimetric analysis weighs 12.529 6 g. (a) Each mass has six significant digits. What is the mass of precipitate contained in the crucible and how many significant digits are in that mass?
(b) The manufacturer states that the balance has an uncertainty of ± 0.3 mg. Find the absolute and relative uncertainty of the mass of the precipitate and write the mass with a reasonable number of digits.

I know the answer of (a), but need (b) answer.

the correct answer is answer a. a mixture

no other options make sense

hope this

have a great day : )

  - sprinkles

explanation:

let the different atoms be x and y. each with four protons and same mass will be represented as follows.

mass number is number of protons + number of neutrons.

            and  

since, it is given that one has a negative charge while the other is neutral. therefore, there will be increase in number of protons and the atom will be represented as follows.

according to periodic table, mass number of beryllium is 9 and it has atomic number 4 so, the atoms will be and .  

the protons and neutrons will be located inside the nucleus whereas the electrons will be revolving around the nucleus.  

air

in a tire you fill a tire with air

then a couple days later you check the air pressure in the tire

hope this mark me brainliest

answer; capital earns interest; entrepreneurship receives a profit or incurs a loss;