Answer:
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" 2 Li + Br2<span> ----> 2 LiBr " .
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At first I thought it was c but then I checked And it’s either B or A? I’m thinking mostly A but good luck
Answer:
189.6 mL
Explanation:
As per Boyles law when a gas is kept at a constant temperature and mass in a closed container, the volume and pressure vary inversely.
P1V1= P2V2
Here, P1 = 0.79 atm, V1 = 240 ml, P2= 1 atm
therefore, substituting values in above equation we get
0.79×240 = 1×V2
⇒V2 = 189.6 ml
therefore, its volume at STP (1 atm and 0 oC) = 189.6 ml
Answer:
2.67g of NH4Cl are required
Explanation:
Molarity is an unit of concentration in chemistry defined as the moles of solute (In this case, NH4Cl), per liter of solution.
To prepare 100mL of a 0.50M are required:
100mL = 0.100L * (0.50 moles / L) = 0.0500 moles NH4Cl
As molar mass of NH4Cl is 53.491g/mol:
0.0500 moles * (53.491g / mol) =
<h3>2.67g of NH4Cl are required</h3>
Remember the formula for density:
where d is density, m is mass, and v is volume.
Therefore,
B. mass and volume is needed to determine the density