<span> "B. Empty space around the nucleus"
because of this empty space, most radiated particles can pass </span>straight through, while the others get propelled in different directions.
Answer:
The postulate of Dalton's atomic theory that an atom is an indivisible particle and cannot be subdivided into smaller particles was later changed because atoms can be divided into neutrons, protons and electrons.
Explanation:
Answer:
First of all we will calculate the amount of CO₂ produced by burning 10 grams of Methane. The balance chemical equation is as follow:
CH₄ + 2 O₂ → CO₂ + 2 H₂O
First we will calculate the moles of CH₄ as,
Moles = Mass / M.Mass
Moles = 10 g / 16 g/mol
Moles = 0.625 moles
Secondly calculate the moles of CO₂ produces theoretically,
According to equation,
1 mole of CH₄ produces = 1 mole of CO₂
So,
0.625 moles of CH₄ will produce = X moles of CO₂
Solving for X,
X = 1 mole × 0.625 moles / 1 mole
X = 0.625 moles of CO₂
At last calculate mass of CO₂ as,
Mass = Moles × M.Mass
Mass = 0.625 mole × 44 g/mol
Mass = 27.5 g ≈ 27 g
Conclusion:
From above calculation it can be concluded that this reaction is following law of conservation of mass. There is neither a gain nor a loss of mass during the reaction. Also, this can be made possible when the given amount of methane is provided with excess of O₂ gas so that the methane is completely combusted.
Answer:
melanin
Explanation:
Just as a rabbits fur lightens it darkens in the summer this is due to the melanin in their bodies reacting to the sunshine. A rabbit will shed a subtanical amount of fur during it's summer molt.
To determine the empirical formula of the compound given, we need to determine the ratio of each element in the compound. An empirical formula is a formula that gives the proportions of the elements present in a certain compound however it does not give the actual numbers or the arrangement of the atoms.The empirical formula of the ionic compounds that could be formed from the given ions are calcium bromide (CaBr2), calcium sulfide (CaS), Lead Bromide (PbBr4) and Lead sulfide (Pb2S4).
