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stellarik [79]
3 years ago
8

How can you describe the location of vanadium (v, atomic number 23) on the periodic table? Choose all that apply.

Chemistry
1 answer:
Orlov [11]3 years ago
5 0
Vandium is non metal but group 5 period 4 
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A certain first-order reaction a → b is 25% complete in 42 min at 25°c. What is the half-life of the reaction?.
kicyunya [14]

Half life of the reaction is :-101.9 min

a→b

25% reacted means 75% remains

t=42 min

Rate constant

k=(2.303/t)(log a/a-x)

k=(2.303/42)(log 100/100-25 )

k=(0.054) (log 100/75)

k=(0.054)(0.1249)

k=0.0068per min

half life

t1/2=(0.693/k)

     =(0.693/0.0068)

     =101.9 min

Learn more about Half life here:-

brainly.com/question/3788119

#SPJ4

8 0
2 years ago
Calculation: If a compound is 14.40% hydrogen by mass and 85.60% carbon by mass, what is the empirical formula?
IgorLugansk [536]

Answer:

CH2

Explanation:

We are given that a compound is 14.40% hydrogen and 85.60% carbon.

Let the mass of the substance be 100g.

Mass of the hydrogen: 14.40% of 100 = 14.40 g

Mass of the carbon: 85.60% of 100 = 85.60 g

Now, let's find the moles of hydrogen:

14.40 g*\frac{1 mole}{1gH} = 14.40 mole

Moles of carbon:

85.60g*\frac{1 mol}{12gC} = 7.13mol

Let's put these in a ratio and simplify:

7.13 mole C: 14.40 mole H

1 mole C: 2 mole H

Therefore, the empirical formula of this compound is CH2.

Hope this helps!! If you have any questions about my work, please let me know in the comments!

3 0
2 years ago
HELP! What property is not used to separate a mixture ?
andre [41]
I believe it’s conductivity
7 0
3 years ago
Read 2 more answers
A pendulum bob at its highest point has a certain amount of potential energy. As it falls, what does the potential energy get tr
Lisa [10]
Good

Because is that true
3 0
3 years ago
What type of reaction is displayed below?
mr Goodwill [35]

Answer:

double replacement

Explanation:

The reaction shown is a double replacement reaction.

It is also known as double decomposition or metathesis reaction.

In such a reaction, there is an actual exchange of partners to form new compounds.

One of the following is the driving force for such reaction:

  • formation of an insoluble compound or precipitate
  • formation of water or any other non-ionizing compound
  • liberation of a gaseous product.
3 0
3 years ago
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