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4 years ago

Why is it necessary to mix the solution very rapidly when the bleach is added?

1 answer:

3 0

It is necessary to add the bleach rapidly because the chemical reaction will occur rapidly. In order to get all of the bleach to interact with the other substance as a whole and not in part, it is necessary to add everything in a very rapid manner, otherwise the amount of the other chemical may not have enough time to properly interact with all of the bleach.

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When helium was discovered by humans?

saul85 [17]

Helium was discovered in 1868.

8 0

3 years ago

Pls help

Dmitry_Shevchenko [17]

Answer:

The answer would be beryllium

You were probably confused but the correct answer would actually be a beryllium ion.

4 0

3 years ago

27. The density of nickel is 8.91 g/cm3. How large a cube, in cm3, would contain 2.00 x 10^24 atoms of nickel? Use dimensional a

jok3333 [9.3K]

Answer : The volume of the cube is, $21.88cm^3$

Solution : Given,

Density of nickel = $8.91g/cm^3$

Number of nickel atoms = $2\times 10^{24}$

Molar mass of nickel = 58.7 g/mole

First we have to calculate the moles of nickel.

As, $6.022\times 10^{23}$ atoms form 1 mole of nickel

So, $2\times 10^{24}$ atoms form $\frac{2\times 10^{24}}{6.022\times 10^{23}}=3.321$ moles of nickel

The moles of nickel = 3.321 moles

Now we have to calculate the mass of nickel.

$\text{ Mass of Ni}=\text{ Moles of Ni}\times \text{ Molar mass of Ni}$

$\text{ Mass of Ni}=(3.321moles)\times (58.7g/mole)=194.94g$

The mass of nickel = 194.94 g

Now we have to calculate the volume of nickel.

$Density=\frac{Mass}{Volume}$

$8.91g/cm^3=\frac{194.94g}{Volume}$

$Volume=21.88cm^3$

Therefore, the volume of the cube is, $21.88cm^3$

4 0

3 years ago

Given the balanced equation representing a reaction:

notsponge [240]

Answer:

it is a base because they accept H+ ions

Explanation:

4 0

3 years ago

Count the total number of atoms in sio2:

grigory [225]

Atoms are the basic units of matter and the defining structure of elements. We count the number of atoms by the total number of elements present in the compound. In this case, we have 1 atom of Si and 2 atoms of oxygen which would have 3 total number of atoms.

8 0

3 years ago