Answer:
V = 39.38 L
Explanation:
Given that,
No. of moles of H₂, n = 2
Temperature, T = 300 K
Pressure, P = 1.25 atm
We need to find the volume occupied by the gas. We can use the ideal gas law to find it such that,
Where
R is gas constant, R = 0.08205 L-atm/mol-K
V is volume of the gas
Rearranging the above formula for V. So,
So, the volume occupied by the gas is 39.38 L.
<span>He used the patterns he found in properties of known elements to predict the properties of unknown elements.</span>
A bike rusting is an example of a chemical
change since rusting is a chemical reaction. New substances are formed from
this reaction. On the other hand, other choices given are just physical changes
because only the shape or the physical form of the substances are being
changed. An example of a physical change is cutting a paper.
Answer:
Benzoic acid
Explanation:
In this case we have a Grignard reaction in which we go from a formula of C6H5Br to C7H6O2. In other words, we add 1 carbon to the molecule. The only way to add one carbon to this molecule is using as a reagent. When this compound is used as electrophile a carboxylic acid is produced.
Respect to the NMR info, we have a <u>downfield singlet signal</u> at 12.1 ppm which is characteristic of the <u>acid hydrogens</u> in the carboxylic acids (see figure 1). When a carboxylic group is added to the benzene we will obtain the <u>benzoic acid</u> which fits with the formula and the NMR info given.