16
Explanation:
The subatomic particles in any atom are made up of protons, neutrons and electrons in it.
Protons are the positively charged particles.
Neutrons do not carry any charges.
Together with protons, they occupy the nucleus.
Electrons are negatively charged particles.
In an atom of B - 11;
11 is the mass number
mass number = number of protons + number of neutrons.
Total subatomic particles = proton + neutrons + electrons
TSP = mass number + electrons
In B, the atomic number = 5 = number of electrons
TSP = 11 + 5 = 16
learn more:
Atomic number brainly.com/question/5425825
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Answer:
N(Au) = 1,20 × 10²²
Explanation:
1) n(Au) = m ÷ M = 4.60 g ÷ 197 g/mol = 0,02 mol
2) N(Au) = n(Au) × N(a) = 0,02 × 6.02*10²³ = 1,20 × 10²²
Hydrogen react with with carbon monoxide(Carbon (ii) oxide) to form methyl alcohol
CO + 2H2 ----> CH3OH
step one calculate the number of moles of H2
= 11g/2.0 g/mol (molar mass of H2 moles = 5.5moles
calculate the moles CO = 37.25grams/28 =1.330moles
The reacting ratio of of H2 to CH3OH 2:1
1.330 x 2/1+2.661 moles of H2 but there is more H2 present than that of co
therefore the grams of CH3OH is threfore =1.330 x32(molar mass of CH3OH) =42.65grams
27 it would be neutral if it had 24 electrons and 24 protons but because it is +3 that means it had 3 more protons than electrons so the answer would be 24+3