What is the molarity of 750 ml of a solution containing 2.10 moles of Na_2SO_4?
Answers
Answer:
Explanation:
The molarity or concentration of can be found by using the formula;
c is the concentration in M , mol/dm³ or mol/L
v is the volume in L or dm³
n is the number of moles
From the question;
n = 2.1 moles
v = 750 mL which has to be converted to litres
We have the final answer as;
2.8 M
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Answers
Boyle's law deals with pressure and volume.
What is Boyle's law?
Robert Boyle studied the relationship between the pressure p and the volume V of a confined gas held at a constant temperature.
Boyle observed that the product of the pressure and volume are observed to be nearly constant.
The product of pressure and volume is exactly a constant for an ideal gas.
PV = constant
As per Boyle’s law, any change in the volume occupied by a gas (at constant quantity and temperature) will result in a change in the pressure exerted by it. In other words, the product of the initial pressure and the initial volume of a gas is equal to the product of its final pressure and final volume (at constant temperature and number of moles).
Therefore, Boyle's law deals with pressure and volume.
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Pressure= P
Volume= V
Pressure involves torr, atm, kPa,etc..
Volume involves mls/ milliter, l / liter, etc...
Answers
Answer:
If they are both non-metals
Explanation:
covalent = non-metal + non-metal
ionic = metal +non-metal
metallic = metal +metal
B) find the speed in mi/h of the runner who set the record of 9.21 seconds.
Answers
To solve this problem convert the units first from meter and yards to miles. 100 metes is 0.0621371mi and 100 yards is 0.0568182 yard. 9.69s = 0.002691667 hr and 9.21s = 0.002558333
A.) 23mi/hr
B.) 22.20mi/hr
Answer:
A) The speed of the runner is 23.085 mile/hr.
B) The speed of the runner is 22.209 mile/hr.
Explanation:
A) Distance covered in 9.69 seconds = 100 m
1 mile = 1609.34 m
1 hour = 3600 seconds
9.69 s =
Speed of the runner =
The speed of the runner is 23.085 mile/hr.
B) Distance covered in 9.21 seconds = 100 yards
1 mile = 1760 yards
1 hour = 3600 seconds
9.21 s =
Speed of the runner =
The speed of the runner is 22.209 mile/hr.
Answers
C17H18F3NO = 309.33 g/mol
1 mol -------------- 309.33 g
x mol -------------- 3 g
x = 3 / 309.33
x = 0.00969 mol
1 mol ------------- 6.02x10²³ molecules
0.00969 --------- y molecules
y = 0.00969 * 6.10x10²³
y = 5.83x10^21 molecules
hope this helps!.
Answers
According to the mole concept, there are 76.94 g in 2.4 moles of sulfur atoms.
What is a mole?
Mole is defined as the unit of amount of substance . It is the quantity measure of amount of substance of how many elementary particles are present in a given substance.
It is defined as exactly 6.022×10²³ elementary entities. The elementary entity can be a molecule, atom ion depending on the type of substance. Amount of elementary entities in a mole is called as Avogadro's number.
It is widely used in chemistry as a suitable way for expressing amounts of reactants and products.For the practical purposes, mass of one mole of compound in grams is approximately equal to mass of one molecule of compound measured in Daltons. Molar mass has units of gram per mole . In case of molecules, where molar mass in grams present in one mole of atoms is its atomic mass.
Mass is found out by number of moles by formula , mass=number of moles×molar mass
Substitution in above formula gives, mass=2.4×32.06=76.94 g
Thus, there are 76.94 g in 2.4 moles of sulfur.
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Given molesX Molar Mass(g)/1 mol= Mass in grams
2.4 moles X 32.065/1
76.96 Grams :)