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2 years ago

What is the symbol for uranium and it's atomic number?

Chemistry

2 answers:

Leviafan [203]2 years ago

6 0

Uranium has the symbol of U. It's atomic number is 92. It is in the Actinide group at the bottom of the periodic table.

Hatshy [7]2 years ago

5 0

The symbol is U and its atomic number is 92

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How many liters are equal to 8 megaliters (ML)?

Reika [66]

Answer:

8000000 litres

Explanation:

General formula,

→ 1 megaliter = 1000000 litres

Then 8 megaliters will be,

→ 8 × 1000000

→ [ 8000000 litres ]

Hence, the solution is 8000000 L.

7 0

1 year ago

How does fracking benefit humans?<br><br> (dont use go0gle please!)

Flura [38]

Answer:

Explanation:

Its just dangerous stuff can go in the air and harm others

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3 years ago

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Alborosie

Answer:

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2 years ago

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A first-order reaction (A → B) has a half-life of 25 minutes. If the initial concentration of A is 0.900 M, what is the concentr

Oksanka [162]

Answer:

0.6749 M is the concentration of B after 50 minutes.

Explanation:

A → B

Half life of the reaction = $t_{1/2}=25 minutes$

Rate constant of the reaction = k

For first order reaction, half life and half life are related by:

$k=\frac{0.693}{t_{1/2}}$

$k=\frac{0.693}{25 min}=0.02772 min^{-1}$

Initial concentration of A = $[A]_o=0.900 M$

Final concentration of A after 50 minutes = $[A]=?$

t = 50 minute

$[A]=[A]_o\times e^{-kt}$

$[A]=0.900 M\times e^{-0.02772 min^{-1}\times 50 minutes}$

[A] = 0.2251 M

The concentration of A after 50 minutes = 0.2251 M

The concentration of B after 50 minutes = 0.900 M - 0.2251 M = 0.6749 M

0.6749 M is the concentration of B after 50 minutes.

7 0

2 years ago

An aqueous solution contains 0.100 m naoh at 25.0 °c. the ph of the solution is ________.

ikadub [295]

Recall; pH + pOH = 14
In this case [OH-] =0.100 m
therefore;
pOH = -LOG[OH-]
= - Log (0.100)
= 1.00
Therefore; the pOH is 1.00
And since, pH +pOH = 14
Then pH = 14-pOH
= 14 -1
= 13
Thus the pH is 13.00

7 0

3 years ago