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3 years ago

Among the following which metal is a poor conductor of electricity

Chemistry

1 answer:

Lyrx [107]3 years ago

8 0

Answer:

Hi! Im pretty sure the answer is A

Explanation:

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Which compound contains both ionic and covalent

DedPeter [7]

(1) CaCO3 is your answer. The positive ion is $\text{Ca}^{2+$ and the negative radical ion is $\text{CO}_3^{-}$ . There exists covalent bonds between the carbon and oxygen atoms in the $\text{CO}_3^{-}$ .

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4 years ago

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melisa1 [442]

Ifs would be the third one down

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3 years ago

What is the chemical formula of palladium (iv)sulfate

Margarita [4]

<u>Answer: </u>The chemical formula for Palladium(IV) sulfate is $Pd(SO_4)_2$

<u>Explanation:</u>

Palladium is the 46th element of the periodic table which has an oxidation state of +4 (because it is a metal and will form positive ion) and sulfate is the polyatomic ion having a charge of -2 with formula $(SO_4^{2-})$

So, to write the formula of the compound, we do criss cross method in which oxidation state of each element or ion is given to the other combining atom which results into the formation of a neutral compound.

The chemical formula of the compound is $Pd(SO_4)_2$

The image is given below.

4 0

4 years ago

What is the molarity (M) of an 85.0-mL solution (total volume) containing 1.77 g of ethanol (C2H5OH)

Liono4ka [1.6K]

Answer: The molarity of solution is 0.453 M

Explanation:

Molarity of a solution is defined as the number of moles of solute dissolved per liter of the solution.

$Molarity=\frac{n\times 1000}{V_s}$

where,

n = moles of solute

$V_s$ = volume of solution in ml

moles of $C_2H_5OH$ = $\frac{\text {given mass}}{\text {Molar mass}}=\frac{1.77g}{46g/mol}=0.0385mol$

Now put all the given values in the formula of molality, we get

$Molarity=\frac{0.0385\times 1000}{85.0}$

$Molarity=0.453$

Therefore, the molarity of solution is 0.453 M

7 0

3 years ago

General Lab Questions: (8 points) 5. A) What is the main problem with precipitating strontium ions from the town's water using p

Umnica [9.8K]

Answer:

1) high pH is required

2) other ions are precipitated along with the strontium ions

Explanation:

According to the solubility rules all phosphates are insoluble except those of sodium, potassium, and ammonium. This implies that strontium phosphate is insoluble in water. This explains why strontium ions can be precipitated from drinking water supply using phosphate. The main problem with the precipitation of strontium using phosphate is that it usually requires a high pH as the precipitation occurs under very alkaline conditions.

The main reason why the results may not be accurate is that other ions are precipitated along with the strontium such as calcium ions and magnesium ions. This may lead to inaccurate determination of the amount of strontium ions present.

7 0

3 years ago

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