The balanced equation for the above reaction is as follows;
2K + Br₂ --> 2KBr
Stoichiometry of Br₂ to KBr is 1:2
we have been told that K is present which means that Br₂ is the limiting reactant. Limiting reactant is the reactant that is fully consumed in the reaction and amount of product formed depends on amount of limiting reactant present.
Number of Br moles reacted - 21.4 g / 160 g/mol = 0.134 mol
According to stoichiometry,
1 mol of Br₂ forms 2 mol of KBr
therefore 0.134 mol of Br₂ forms 2x0.134 = 0.268 mol of KBr
mass of KBr formed - 0.268 mol x 119 g/mol = 31.9 g of KBr
a mass of 31.9 g of KBr is formed
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<h3><u>Answer;</u></h3>
New tire pressure = 214.286 kPa
<h3><u>Explanation;</u></h3>
According to Boyle's Law the volume of a fixed mass of a gas is inversely proportional to pressure at constant temperature.
P α V, and PV = Constant
Therefore;
P1V1 = P2V2, where P1 is the initial pressure, V1 is the initial volume , P2 is the new pressure and V2 is the new volume.
P2 = P1V1/V2
= (300 kPa × 30 L)/ 42 L
<u>= 214.286 kPa</u>
Answer:
it have 10 neutrons and it is Fluorine(F).
Explanation:
has lost 1 electron. Therefore, a potassium ion has a smaller radius since it has less electrons.