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Assoli18 [71]
3 years ago
9

Help!! please!! 30 points and i will give brainliest!

Chemistry
2 answers:
xz_007 [3.2K]3 years ago
7 0

Answer:

CaCl2

The charge can be +3 or +2

Explanation:

It takes two atoms of chloride and 1 atom of calcium to make this compound

Levart [38]3 years ago
3 0

Answer: chemical formula is CaCl2.

CaCl2------> Ca^2+ + Cl^-1

Explanation:

+2 for calcium ion and -1 for the chlorine ion.

For K2Cr2O7

The oxidation state of chromium=

(+1×2) + 2x + (-2×7) = 0

+2+2x-14= 0

2x= 12

x= 12/2

x=+6.

Therefore, the oxidation number of Chromium, Cr in K2CrO7 is +6

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How many liters are equivalent to 645 mililiters
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0.645 liters

Explanation:

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A measure of peak separation in a chromatographic method that equals the difference in retention time for two components divided
Mademuasel [1]

A measure of peak separation in a chromatographic method that equals the difference in retention time for two components divided by the average of their peak widths is the definition of resolution.

Retention time can be referred to as the amount of time a solute spends in the stationary and mobile phases of a column.

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The duration of retention will increase as the interaction becomes more strong.

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7 0
2 years ago
What is the net ionic equation for barium sulphate
alexandr1967 [171]

The net ionic equation : Ba²⁺ + SO₄²⁻ ⇒ BaSO₄ (s)

<h3>Further explanation  </h3>

The electrolyte in the solution produces ions.  

The equation of a chemical reaction can be expressed in the equation of the ions  

In the ion equation, there is a spectator ion that is the ion which does not react because it is present before and after the reaction  

When these ions are removed, the ionic equation is called the net ionic equation  

For gases and solids including water (H₂O) can be written as an ionized molecule  

So only the dissolved compound is ionized ((expressed in symbol aq)  

Barium sulfate can be formed from the reaction:

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For full ionic equation :

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by removing spectator ions (2NO₃⁻ and 2 Na⁺), the net ionic equation :

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4 0
3 years ago
Under the right conditions aluminum will react with chlorine to produce aluminum chloride.
salantis [7]

Answer:

m_{Al}=9.42gAl

Explanation:

Hello there!

In this case, according to the given chemical reaction:

2 Al + 3 Cl2 --> 2 AlCl3

Whereas there is a 2:3 mole ratio of aluminum to chlorine; it will be possible for us to calculate the required grams of aluminum by using the equality 22.4 L = 1 mol, the aforementioned mole ratio and the atomic mass of aluminum (27.0 g/mol) to obtain:

m_{Al}=11.727LCl_2*\frac{1molCl_2}{22.4LCl_2}*\frac{2molAl}{3molCl_2}  *\frac{27.0gAl}{1molAl} \\\\m_{Al}=9.42gAl

Regards!

8 0
3 years ago
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