What are the answer choices?
Answer:
94.2 g/mol
Explanation:
Ideal Gases Law can useful to solve this
P . V = n . R . T
We need to make some conversions
740 Torr . 1 atm/ 760 Torr = 0.974 atm
100°C + 273 = 373K
Let's replace the values
0.974 atm . 1 L = n . 0.082 L.atm/ mol.K . 373K
n will determine the number of moles
(0.974 atm . 1 L) / (0.082 L.atm/ mol.K . 373K)
n = 0.032 moles
This amount is the weigh for 3 g of gas. How many grams does 1 mol weighs?
Molecular weight → g/mol → 3 g/0.032 moles = 94.2 g/mol
Answer:
Option A. neutral
Explanation:
we know that
The pH is a number that describe the concentration of hydrogen ions in the solution. A solution's pH will be a number between 0 and 14.
A solution with a pH of 7 is classified as neutral.
If the pH is lower than 7, the solution is acidic.
If the pH is higher than 7, the solution is basic.
In this problem we have a solution that has a pH=7
therefore
The solution is classified as neutral
Answer:the second one
Explanation:,Hydrogen bonding is a special type of dipole-dipole attraction between molecules ,not a covalent bond to a hydrogen atom. It results from the attractive force between a hydrogen atom covalently bonded to a very electronegative atom such as a N, O, or F atom and another very electronegative atom.
Answer:
The dog weighs 29,88 lbf at the top of the Everest
Explanation:
The difference between mass and weight is that <em>mass is the amount of matter in a material</em>, while <em>weight is a measure of how the force of gravity acts upon that mass.</em>
So mass remains constant always, while weight depends on gravity. At the same time, on Earth, gravity varies slightly depending on the distance to the center of Earth. At the top of Mountain Everest, gravity has a value of 32,042 ft/s2 (normally we use 32, 174 ft/s3 as the average gravity value of Earth) so the weight of the dog will be:
W=m*g.............
<em>Note that normally 1 lbm </em><u><em>has a weight</em></u><em> of 1 lbf because 1 lbf = 32,174 lbmft/s^2 (the average value of gravity in Earth)</em>