A sample of gold (AU) has a mass of 57.01 g.

Biology

2 answers:

san4es73 [151]2 years ago

8 0

Answer:

Number of moles is 0.2894 moles Au

Given:

Mass of gold= 57.01 g

To find:

Number of moles

Formula:

<h2>Number of moles= Given mass/Molar mass of gold </h2>

Molar mass of gold= 196.97 g/mol.

By substituting we get(57.01 g Au) / (196.97 g/moles) = 0.2894 moles Au

Hence we get number of moles=0.2894 moles Au

Note: Molar mass= Mass of the sample of a compound/Total amount of that substance in that sample. Molar masses of different substances are the standard value which are specifically arranged to each compound

Kamila [148]2 years ago

6 0

A). Calculation: Given mass of Au * 1mol of Au/molar mass of Au= # of moles ;

57.01 g Au*1 mole of Au/196.97g Au=0.3 moles of Au. So the answer is 0.3 moles of gold(Au). Good luck on the rest, and message me on Brainly if you need more help. I'll be happy to.

You might be interested in

In beans, the black color of the seeds (A) dominates over the white (a). When two bean plants were crossed with black seeds, pla

Savatey [412]

Answer:

mark me brainleast then I will be

8 0

2 years ago

Plants don’t move freely. How do the plant structures shown in the three images help to ensure successful reproduction? Explain

RSB [31]

The bee who is enthralled by the pollen gets some of it stuck to itself and travels with the plants offspring which ensures the plants reproduction. The wind blows the seeds of the dandelion to far off places to ensure the reproduction of the dandelion. The squirrel who is storing acorns for the winter will eat some of them, but other acorns are forgotten which ensures the reproduction of the acorn tree's reproduction.

3 0

3 years ago

Read 2 more answers

How can raw water treated in city when supply system for class 5 in the short answer

jekas [21]

Answer:

➢ Raw water must be treated or clarified prior to being used as makeup water in most utility processes. Clarification removes suspended and dissolved solids, bacteria, and other forms of impurities to help prevent system scale, corrosion, and fouling.

Explanation:

I hope it will help you have a great day bye and Mark brainlist if the answer is correct

$kai6417$