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3 years ago

Using the table on the right, complete each calculation by typing in the correct answer.

Chemistry

1 answer:

Pavel [41]3 years ago

8 0

Answer:

13,200 mL

Explanation:

multiply by 1000 to go from L to mL

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Calculate the ratio of effusion rates of cl2 to f2 .

WINSTONCH [101]

Answer: Graham's law of gaseous effusion states that the rate of effusion goes by the inverse root of the gas' molar mass. râšM = constant Therefore for two gases the ratio rates is given by: r1 / r2 = âš(M2 / M1) For Cl2 and F2: r(Cl2) / r(F2) = âš{(37.9968)/(70.906)} = 0.732 (to 3.s.f.)

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2 years ago

What is the charge of a boron ion with 5 protons and 7 electrons

zlopas [31]

Negative, because electrons have a negative charge and there are more of them.

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2 years ago

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Calculate the percent composition by mass of iron in Fe(NO3)3

Dovator [93]

Answer:

It's 23.14 percent

Explanation:

First, the mass of all the elements are:

N = 14

O = 16

Fe = 56

In this molecule you have 3 atoms of N, and 9 atoms of O, so:

3•14 = 42

16•9 = 144

The whole mass of the molecule is:

56 + 42 + 144 = 242

242/100 = 2.42, so 1% is 2.42

56/2.42 = 23.14%

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3 years ago

Need help please it must be right thank u

vova2212 [387]

Answer:

13. c) Net

14. a) Gravity

15. d) Watt

16. b) the speed will suddenly decrease.

Explanation:

13. The net force is combination of all individual forces.

14. When we sit on the chair , then gravitational force acts on our body due to our mass.

F = mg

here, F = force due to gravity , g = acceleration due to gravity and m= mass of the body

15.Power : It is the force acting per unit area .It is discovered by James Watt

$Power =\frac{force}{area}$

$Power =\frac{N}{m^{2}}$

Its unit is $Nm^{-2}$ .In honor of the Scientist , its unit is Watt.

Watt = $Nm^{-2}$

16. When the parachute first opens , the speed of the skydiver suddenly decreases because of the resistance offered by the air particles.(For more details look at the figure attached)

17. Transfer of momentum from one object to other is the law of conservation of momentum (NOT ENERGY).So the answer is False

 Law of Conservation of Momentum :  Total momentum of a system is conserved if no external force attack on it. Momentum can neither be created nor destroyed but transferred from one form to other.

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3 years ago

The sun and stars give off radiant energy.

avanturin [10]

C.whether it is moving toward us or away from us

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2 years ago

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