Answer:
2.88L
Explanation:
So lets first consider the definition of molarity.
Molarity is the amount of moles per one L of solution. So we can simply put this as:
M = moles/L of solution
So the way we are going to approach this is we need to find the amount of moles of HCl. By doing this we can then use the amount of moles we have to figure out how much 5M solution we can then make. So lets plug in what we know:
It gives us 12M of HCl so M = 12
We also have 1.2L of HCl so volume of soltion = 1.2L
Meaning we have:
So if we multiply the 1.2 over we get:
Moles: 14.4
So we used 14.4 moles of HCl in our original 12M solution.
Now we can plug this value with our 5M in instead to get our amount of solution we could form:
This gives us
5(volume) = 14.4 moles
Meaning that
Volume = 14.4/5 or 2.88L
Answer:
The Kinetic Energy is approximately 3 times decreased
Explanation:
A baseball weighs 5.13 oz.
a)What is the kinetic energy, in joules, of this baseball when it is thrown by a major league pitcher at 95.o mi/h?
b) By what factor will the kinetic energy change if the speed of the baseball is decreased to 54.8 mi/h? Express your answer as an integer.
Kinetic Energy (KE)=0.5×mass×velocity ^ 2
Kinetic Energy (KE)=0.5×mass × velocity ^ 2
Joules = kg×m^2/s^2
1 mile = 1609.344 meters
1 hour = 3600 sec
1 Oz = 28.34952 g = 0.02834952 kg
a) KE=0.5×m×v^2
=0.5×(5.13 oz × 0.02834952 kg/1 ounce)×(95 miles/h × 1609.344 m/1 mile × 1 hr/3600 s)^2
=130.761 kg×m^2/s^2 = 130.761 Joules
b) KE=0.5×m×v^2
=0.5×(5.13 oz × 0.02834952 kg/1 ounce)×(54.8 miles/h × 1609.344 m/1 mile × 1 hr/3600 s)^2
=43.51028 kg×m^2/s^2 = 43.51028 Joules
= 130.761 / 43.51028 = 3.00528,
As such the Kinetic Energy is approximately 3 times decreased
<span>No... when you are being creative in science, it means to make the truth about<span> <span>science interesting... not to make it up.</span></span></span>
To solve this we assume that the gas inside the balloon is an ideal gas. Then, we can use the ideal gas equation which is expressed as PV = nRT. At a constant pressure and number of moles of the gas the ratio T/V is equal to some constant. At another set of condition of temperature, the constant is still the same. Calculations are as follows:
T1 / V1 = T2 / V2
V2 = T2 x V1 / T1
V2 =90 x 20 / 360
<span>V2 = 5 L</span>
8g:20g. 12g:x
8/20 =12/x solve for x
X=30