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Delicious77 [7]
3 years ago
5

When aqueous solutions of __________ are mixed, a precipitate forms.

Chemistry
1 answer:
tatyana61 [14]3 years ago
5 0

Answer:

nibr2 and agno3

Explanation:

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Which of the following atoms has the same number of neutrons as 9Be?
xxMikexx [17]

Answer: -

¹⁰B

Explanation: -

For ⁹Be,

The atomic number is 4.

The Mass number is 9.

The number of neutrons = mass number - atomic number

= 9 - 4 = 5

For ⁹B,

The atomic number is 5.

The Mass number is 9.

The number of neutrons = mass number - atomic number

= 9-5 = 4

For ¹⁰B,

The atomic number is 5.

The Mass number is 10.

The number of neutrons = mass number - atomic number

= 10-5 = 5

For ¹⁰Be,

TThe atomic number is 4.

The Mass number is 10.

The number of neutrons = mass number - atomic number

= 10-4 = 6

For ¹²C,

The atomic number is 6.

The Mass number is 12.

The number of neutrons = mass number - atomic number

= 12-6 = 6

4 0
4 years ago
How many moles of Chromium are in 1.410 * 10 ^ 23 atoms of Chromium?
leva [86]

Answer:

<h3>The answer is 0.23 moles</h3>

Explanation:

To find the number of moles in a substance given it's number of entities we use the formula

n =  \frac{N}{L}  \\

where n is the number of moles

N is the number of entities

L is the Avogadro's constant which is

6.02 × 10²³ entities

From the question we have

n =  \frac{1.410 \times  {10}^{23} }{6.02 \times  {10}^{23} }  \\  = 0.234219...

We have the final answer as

<h3>0.23 moles</h3>

Hope this helps you

4 0
3 years ago
During seafloor spreading, what kind of new earth forms?​
Elena-2011 [213]

Answer:

This bubbled-up magma is cooled by frigid seawater to form igneous rock. This rock (basalt) becomes a new part of Earth's crust. Seafloor spreading occurs along mid-ocean ridges—large mountain ranges rising from the ocean floor.

Explanation:

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4 0
3 years ago
What are the names of the elements which are gases in the air
Yakvenalex [24]
The molecules of two different elements, nitrogen and oxygen, make up about 99 percent of the air.


have a good day !! :)
6 0
3 years ago
Read 2 more answers
Suppose that 70g of a substance is dissolved in 100cm^3 of water at 80°C. How much of the substance, in grams, will precipitate
Arisa [49]
Well the substance amount would be 45 because it will rise and began to drop temp while still being heated debate over the eastern half of the Roman empire became known as the teacher apologise for the teacher apologise to do ariana grande
3 0
3 years ago
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