2 years ago

A student weighs out 3.68 grams of cobalt (II) chloride to do an experiment with. How many moles of is this?

Chemistry

1 answer:

leva [86]2 years ago

8 0

Answer:

0.029mol

Explanation:

from

n=m÷mr

where

n is number of moles

m is mass

mr is molar mass

You might be interested in

An apple has a mass of 297 grams. How many kilograms is this? (Note: You can use the information in the table below to make a co

yan [13]

.297 kilograms
297g x 1 kg/100 g = .297

4 0

3 years ago

Read 2 more answers

a chemical reaction produced 2.50 moles of nitrogen gas. what volume in liters, does this gas sample occupy at STP? (show your w

Harrizon [31]

The volume of N₂ at STP=56 L

<h3>Further explanation</h3>

Given

2.5 moles of N₂

Required

The volume of the gas

Solution

Conditions at T 0 ° C and P 1 atm are stated by STP (Standard Temperature and Pressure). At STP, the volume per mole of gas or the molar volume-Vm is 22.4 liters/mol.

So for 2.5 moles gas :

$\tt 2.5\times 22.4=56~L$

5 0

3 years ago

Which option best describes hydrolysis?

Bezzdna [24]

: A chemical process of decomposition involving the splitting of a bond by the addition of water.

7 0

2 years ago

Find the ph of of 100 ml of an aqueous 0.43m baoh2 solution

denpristay [2]

Answer is: pH of barium hydroxide is 13.935.
Chemical dissociation of barium hydroxide in water:
Ba(OH)₂(aq) → Ba²⁺(aq) + 2OH⁻(aq).
c(Ba(OH)₂) = 0.43 M.
V(Ba(OH)₂) = 100 mL ÷ 1000 mL/L = 0.1 L.
n(Ba(OH)₂) = 0.43 mol/L · 0.1 L.
n(Ba(OH)₂) = 0.043 mol.
From chemical reaction: n(Ba(OH)₂) : n(OH⁻) = 1 : 2.
n(OH⁻) = 0.086 mol.
c(OH⁻) = 0.86 mol/L.
pOH = -logc(OH⁻).
pOH = 0.065.
pH = 14 - 0.065 = 13.935.

4 0

3 years ago

100 POINTS ANSWER FAST

andreev551 [17]

I would say b is the correct answer

6 0

3 years ago

Read 2 more answers