Answer:
10.5g of KBr
Explanation:
molarity = moles of solute / litres of solution
we are given the volume of the solution in milliliters but the formula uses litres so we have to convert
to convert to liters we divide the number of milliliters by 1000 ( because 1 liter has 1000 milliliters. )
so liters of solution = 92.7/1000 = 0.0927 L
we can now plug in what we are given and solve for moles of solute
recall molarity = moles of solute / litres of solution
molarity = 0.955M and liters of solution = 0.0927L
so
multiply both sides by 0.0927
we're left with moles of solute = 0.0885285 moles
Finally we must convert moles to grams
Molar mass of KBr = 39.0983 + 79.904 = g/mol
Using dimensional analysis we get
the mol KBr cancel out on both sides and we get which is equal to 10.5g (rounded)
So we can conclude that 10.5g of KBr is dissolved in 92.7mL of a 0.955M solution.
Answer: b
Explanation: 50% comes from one parent and 50% comes from the other
Answer:- D) particles .
Solution:- There are 1.53 moles of the compound are given and it asks to calculate the number of particles.
To calculate the number of particles we multiply the moles with Avogadro number.
=
So, the D is the right choice.
1 L ------------------ 1000 cm³
1.30 L --------------- ??
1.30 x 1000 / 1 => 1300 cm³
Answer:
Explanation:
The periodic table of elements is a table consisting of elements arranged by atomic number and properties. There are a total of 118 elements discovered.