All categories

2 years ago

A nickel compound has the formula Ni(NO3)2•xH,0 and a molar mass

Chemistry

1 answer:

Fofino [41]2 years ago

8 0

<h2>Answer: x = 6</h2>

Explanation:

Molar mass of a compound is the sum of the molar mass of all the atoms of the compound.

⇒ Molar mass of the Nickel Compound (Hydrated Nickel (II) Nitrate)

= Molar mass (Ni+ 2N + 6O)+ x (2H+ O)

= [58.693 + 2(14.007) + 6(15.999)] + x [2(1.008) + 15.999] g/mol

= (182.701 + 18.015x) g/mol

Since the molar mass is known to be 290.7 g/mol

then 182.701 + 18.015x = 290.7

⇒ 18.015x = 290.7 - 182.701

x = (290.7 - 182.701) ÷ 18.015

∴ x = 6 [conventionally expressed as a whole number]

that makes the compound Nickel Nitrate Hexahydrate

You might be interested in

You have studied the gas-phase oxidation of HBr by O2: 4 HBr(g) + O2(g) → 2 H2O(g) + 2 Br2(g) You find the reaction to be first

Vlada [557]

Answer:

Explanation:

FIND THE SOLUTION IN THE ATTACHMENT

4 0

3 years ago

Look closely at the valence electrons in all eight columns of your table from part C. Which element's location does not

maw [93]

Answer: helium(He)

Explanation: Helium has only 2 electrons in the outermost energy level, but all of the other elements in its column have eight.

5 0

3 years ago

What is the temperature of a water body containing a 90% saturation and 11.5 ppm of dissolved oxygen?

ozzi

Using the chart that has been provided, we may determine water temperature. We do this by drawing a straight line form the bottom scale which has the ppm of oxygen dissolved to the middle scale which has the percentage saturation.

The line starts from 11.5 ppm on the bottom scale and goes to 90% on the middle scale. Next, we continue this line, without changing its slope, to the third scale showing temperature. We see that it crosses the temperature scale at 4°C.

The temperature of the water is 4 °C.

6 0

4 years ago

I am a celestial body that does not produce light. I orbit a planet

Artyom0805 [142]

A moon would be the correct answer.

5 0

3 years ago

Acetic acid has a Kb of 2.93 °C/m and a normal boiling point of 118.1 °C. What would be the boiling point of a solution made by

alexdok [17]

Boiling point elevation is given as:

ΔTb=iKbm

Where,

ΔTb=elevation in the boiling point

that is given by expression:

ΔTb=Tb (solution) - Tb (pure solvent)

Here Tb (pure solvent)=118.1 °C

i for CaCO3= 2

Kb=2.93 °C/m

m=Molality of CaCO₃:

Molality of CaCO₃=Number of moles of CaCO₃/ Mass of solvent (Kg)

=(Given Mass of CaCO3/Molar mass of CaCO₃)/ Mass of solvent (Kg)

=(100.0÷100 g/mol)/0.4

= 2.5 m

So now putting value of m, i and Kb in the boiling point elevation equation we get:

ΔTb=iKbm

=2×2.93×2.5

=14.65 °C

boiling point of a solution can be calculated:

ΔTb=Tb (solution) - Tb (pure solvent)

14.65=Tb (solution)-118.1

Tb (solution)=118.1+14.65

=132.75

3 0

3 years ago