Answer:
boyles law:heating the can increases the pressure in the can due to increase in the rate of collision of the particles and the can explodes
Explanation:
The answer is (A.) 135.6 N
————
Here is the formula you will need to answer the question.
Formula:
Force(N) = Mass(kg) x Acceleration(m/s²)
or... F(N) = m(kg) x a(m/s²)
————
We need to be certain of the information presented. The problem says the man has a "Mass" of 83 kilograms on Earth. If a man has a Mass of 83 kilograms on Earth, he has a mass of 83 kilograms everywhere. The mass for this problem (even on the moon) is 83.
Mass(kg): 83
————
To find the acceleration of object on other planets, moons, ect, you'll need to search the internet or ask a teacher. There are ways to calculate this, but the problem didn't supply the necessary information to do so.
Acceleration: 1.625 m/s²
————
Now just plug the information into the formula.
F(N) = m(kg) x a(m/s²)
N = 83 x 1.625
N= 135.875
When considering that there could be a slighty more accurate number for acceleration, it can be concluded that the best answer is (A.)
Answer:
PF3 has a trigonal pyramidal molecular geometry.
Explanation:
PF3 has four regions of electron density / electron clouds around the central P atom. The regions of electrons make a tetrahedral arrangement with a bond angle of 109.5°. Only three regions of electrons are bonding and one is non-bonding, so the overall shape is trigonal pyramidal.
Solution :
It is given that :
The formula of the compound = 
And that 4.70 g of the sample contains
mol of Br.
It means that :
1 mol of
contains = 3 mol of Br
∴ 3 mol of
contain in 1 mol of 
mol of
contains
mol of 
Thus the mol of
=
mol
The given mass is = 4.700 g
Therefore, the
of


= 298.4 g/mol
So
of
=
of X + 3 x
of Br
298.4 g/mol =
of X + 3 x 79.90 g/mol
298.4 g/mol =
of X + 239.7 g/mol
of X = 58.71 g/mol (since 1 amu = 1 g/mol)
Therefore the atomic mass of the unknown metal = 58.71 g/mol
So the unknown meta is Nickel.