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3 years ago

What is the driving force of energy that causes convections currents to occur?

1 answer:

3 0

Explanation: The heat produced in the interior of the earth is thought to be the driving force behind plate tectonics. That heat creates convections currents that can be observed in volumes of air and liquid is a known fact.

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A chemist is given a sample of the CuSO4 hydrate and asked to determine its the empirical formula. The original sample weighed 4

Firlakuza [10]

Answer: The formula for this hydrate is $CuSO_4.5H_2O$

Explanation:

Decomposition of hydrated copper sulphate is given by:

$CuSO_4.xH_2O\rightarrow CuSO_4+xH_2O$

Molar mass of $CuSO_4$ = 160 g/mol

According to stoichiometry:

(160+18x) g of $CuSO_4.xH_2O$ decomposes to give 160 g of anhydrous $CuSO_4$

Thus 42.75 g of $CuSO_4.xH_2O$ decomposes to give= $\frac{160}{160+18x}\times 42.75$ g of anhydrous $CuSO_4$

$\frac{160}{160+18x}\times 42.75=27.38$

$x=5$

Thus the formula for this hydrate is $CuSO_4.5H_2O$

8 0

3 years ago

Explain why Noble Gases (group 18 elements) have little/no electronegativity

Doss [256]

Answer: they don't have values there because they aren't on the pauling scale of electronegativity, as they don't form any compounds with other elements. However, argon and neon can technically form compounds with other elements; it is just extremely unlikely.

Explanation:

8 0

3 years ago

use the reaction that occours when magnesium burns in oxygen to show how a reaction might be included in more than one category

Schach [20]

2Mg+O₂⇒2MgO
It can be a combustion reaction, or it can be a combination reaction

5 0

3 years ago

The true value was 0.120. What was your percent<br> error? ____ %

otez555 [7]

Answer:

MRCORRECT has answered the question

Explanation:

what is observed value

3 0

3 years ago

Read 2 more answers

Sodium bicarbonate is used to neutralize the remaining HCl at the end of the reaction. The initial products of this reaction are

V125BC [204]

Answer:

Kindly check explanation section.

Explanation:

Since, the question requires the chemical reaction to be written in lewis for the the processes involved in this particular Question/problem that is to say the neutralization process and the decomposition process. The lewis structure is given in the attached picture.

For the first process; Sodium bicarbonate reacts with HCl to produce the carbonic acid and a salt, known as Sodium chloride.

Na2CO3 + 2HCl ----------> 2NaCl + H2CO3.

The second process shows the decomposition of Carbonic acid into carbon dioxide and water.

6 0

3 years ago