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4 years ago

The speed of a car describes

Chemistry

1 answer:

Kamila [148]4 years ago

4 0

It’ describes how fast the car is going

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A base produces OH-1 ions when dissolved in solution . True . False

lisov135 [29]

Answer:

i think its true

Explanation:

4 0

3 years ago

Increasing the temperature gives particles more

vagabundo [1.1K]

Increasing the temperature a reaction takes place at increases the rate of reaction. At higher temperatures, particles can collide more often and with more energy, which makes the reaction take place more quickly

7 0

3 years ago

Read 2 more answers

What is the hybridization of the C atoms in C2Cl4 ?

Dovator [93]

Answer:

sp2

Explanation:

Orbital hybridization is defined as the changes in the orbitals of atoms when they pair with electrons of other atoms to form chemical bonds.

C atoms in C2Cl4 or tetrachloroethene have a total of three bond pairs, two with each chlorine atom and one with other carbon atom and zero lone pairs. Thus, C atoms in C2Cl4 is sp2 hybridized.

Hence, the correct answer is "sp2".

8 0

3 years ago

How to find an elements atomic weight

Tju [1.3M]

To calculate the average atomic mass, multiply the fraction by the mass number for each isotope, then add them together.

3 0

3 years ago

Ibuprofen is a drug used to manage mild pain, fever, and inflammation. It is a chiral drug, and only the S enantiomer, whose spe

madam [21]

Answer:

Specific Rotation = 105º

S% in mixture = 92%

Explanation:

Specific rotation in organic compounds varies linearly, then the enantiomeric excess can be express as:

$e.e. = \frac{\alpha }{\alpha pure}$

Where alpha is the specific rotation of the mixture and alpha pure is the specific rotation of the excess enantiomer.

Then, knowing that the S enantiomer is in excess you can calculate the specific rotation of that mixture:

$84=\frac{\alpha }{125.0}*100$

$\alpha =105 Degrees$

For calculating the percentage of S you should remember that the enantiometric excess is the percentage of excess of a certain enantiomer, for example in this case:

$84 = S-R$

Since S is in Excess

Also, it is true:

$100=S+R$

Then you can solve the system of linear equations, finding:

$8=R\\92=S$

Hope it helps!

4 0

3 years ago