Answer:
490 J.
Explanation:
The following data were obtained from the question:
Mass (m) = 5 Kg
Height (h) = 10 m
Acceleration due to gravity (g) = 9.8 m/s²
Potential energy (P.E) =..?
Potential energy is the energy stored in a body by virtue of its location. Mathematically, it can be expressed as:
P.E = mgh
Where:
m is the mass of the object measured in kilograms (Kg).
g is the acceleration due to gravity and the value is 9.8 m/s².
h is the height to which the object is located measured in metre (m)
P.E is the potential energy measured in joule (J).
With the above formula, we can obtain the potential energy possed by the object as follow:
P.E = mgh
P.E = 5 x 9.8 x 10
P.E = 490 J
The,the potential energy possed by the object is 490 J
Mass = 473.2 g
Explanation:
Given data:
Mass of cobalt(III) nitrate = 206 g
Mass of silver bromide produced = ?
Solution:
Chemical equation:
CoBr₃ + 3AgNO₃ → 3AgBr + Co(NO₃)₃
Number of moles of cobalt(III) nitrate:
Number of moles = mass/ molar mass
Number of moles = 206 g/ 245 g/mol
Number of moles = 0.84 mol
Now we will compare the moles of cobalt(III) nitrate with silver bromide.
N=24/12
n=2
where n= no. of moles
Molecular weight of P (Phosphorous) = 30.97g/mol
Hydrogen is just 1 g/mol.
How many moles is 34g of PH3?
Get the weight of PH3 (30.97 + (3X1)) = 33.97g/mol
So 34g/33.97g/mol = 1.0009 moles.
I bet for this problem it's easier to round this to 1.
If you look at just the moles in the equation:
P4(s) + 6 H2(g) → 4 PH3(g)
OR
1 + 6 → 4
If 1 (P4) gives us 4 (PH3), what gives us 1 (PH3)?
1/4 = x/1
solve for x
Answer:
B
Explanation:
Figure 1 - Charles Richter studying a seismogram. There are a number of ways to measure the magnitude of an earthquake. The first widely-used method, the Richter scale, was developed by Charles F. Richter in 1934.