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3 years ago

Plutonium is part of what series of elements?

Chemistry

2 answers:

andre [41]3 years ago

7 0

Answer:

Plutonium is the second transuranium element of the actinide series.

astraxan [27]3 years ago

5 0

the answer is actinoid series

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3 years ago

What volume, in milliliters, of a 0.140 M solution of KCl contains 2.65 g of the compound?

marishachu [46]

Answer:

Calculate moles KCl: 2.55 g / 74.55 g/mol = 0.0342 moles KCl

Volume KCl = 0.0342 mol X (1 L/0.150 mol) = 0.228 L X 1000 mL/L = 228 mL

Explanation:

3 0

2 years ago

This equation is not balanced. Click on the coefficient we should change first.<br> help ASAP

horrorfan [7]

Answer: The coefficient we should change first is for $NO_{3}$ .

Explanation:

The given reaction equation is as follows.

$Al + Ni(NO_{3})_{2} \rightarrow Al(NO_{3})_{3} + Ni$

Here, number of atoms present on reactant side are as follows.

Al = 1
Ni = 1
$NO_{3}$ = 2

Number of atoms present on the product side are as follows.

Al = 1
Ni = 1
$NO_{3}$ = 3

To balance this equation, multiply Al by 2 and $NO_{3}$ by 3 on reactant side. Also, multiply $Al(NO_{3})_{3}$ by 2 and Ni by 3 on the product side.

Hence, the equation can be rewritten as follows.

$2Al + 3Ni(NO_{3})_{2} \rightarrow 2Al(NO_{3})_{3} + 3Ni$

Now, number of atoms present on reactant side are as follows.

Al = 2
Ni = 3
$NO_{3}$ = 6

Number of atoms present on product side are as follows.

Al = 2
Ni = 3
$NO_{3}$ = 6

Since, the atoms on both reactant and product side are same. Hence, it is now a balanced chemical equation.

Thus, we can conclude that the coefficient we should change first is for $NO_{3}$ .

7 0

2 years ago

Question 8 (5 points)

Fynjy0 [20]

[H+][OH-]=10-¹⁴

We are using this formula because we need to find the H+

substitute the value given for hydronium ion for OH-

[H+][4.19×10⁵]=10-¹⁴

[H+]=10-¹⁴÷4.19×10⁵

[H+]=2.387×10-¹⁹

Then the pH of the solution will be

pH= –log¹⁰ [H+]

pH = –log¹⁰ [2.387×10-¹⁹]

pH= –log¹⁰2.387+19log¹⁰

= –0.378+19

pH =18.622

8 0

2 years ago

Radioactive decay is caused by

LenaWriter [7]

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6 0

2 years ago