1answer.
Ask question
Login Signup
Ask question
All categories
  • English
  • Mathematics
  • Social Studies
  • Business
  • History
  • Health
  • Geography
  • Biology
  • Physics
  • Chemistry
  • Computers and Technology
  • Arts
  • World Languages
  • Spanish
  • French
  • German
  • Advanced Placement (AP)
  • SAT
  • Medicine
  • Law
  • Engineering
stepan [7]
3 years ago
6

A sample of silver metal contains 1.91 X 1021 atoms. How many moles of silver is this?

Chemistry
1 answer:
alexandr402 [8]3 years ago
6 0

Answer:

1.91×1021/6.023×10^23

Explanation:

need thanks and make me brainiest if it helps you

You might be interested in
An ammonia buffer solution contains 0.20 M N H 4 and 0.24 M N H 3 . The pKa of ammonium is 9.24. What is the pH of the buffer
arsen [322]

Answer:

pH = 0.32

Explanation:

To solve this problem we use the <em>Henderson-Hasselbach equation</em>:

  • pH = pKa + log\frac{[A^-]}{[HA]}

In this case

  • pKa = 9.24
  • [A⁻] is [NH₃], as it is the conjugate base of a weak acid
  • [HA] is [NH₄⁺], as it is a weak acid

So now we just <u>compute the data in the equation</u>

  • pH = 9.24 + log \frac{0.24M}{0.20M}
  • pH = 0.32
6 0
3 years ago
For the formula shown, how many sulfur atoms are represented?
mash [69]

Answer:

bh

Explanation:

8 0
3 years ago
Read 2 more answers
A gas occupies 4.31 liters at a pressure of 0.755 atm. Determine the Temperature
kakasveta [241]

A gas that occupies 4.31 litres at a pressure of 0.755 atm will have a temperature of 39.58°C. Details about temperature can be found below.

<h3>How to calculate temperature?</h3>

The temperature of a gas can be calculated using the following formula:

PV = nRT

Where;

  • P = pressure
  • V = volume
  • n = number of moles
  • R = gas law constant
  • T = temperature

0.755 × 4.31 = 1 × 0.0821 × T

3.25 = 0.0821T

T = 3.25 ÷ 0.0821

T = 39.58°C

Therefore, a gas that occupies 4.31 litres at a pressure of 0.755 atm will have a temperature of 39.58°C.

Learn more about temperature at: brainly.com/question/11464844

#SPJ1

4 0
2 years ago
Natural gas or methane is a fossil fuel. In a plentiful supply of air, it burns to give carbon dioxide and water. Write a balanc
Alex17521 [72]

Answer:

CH_4 + 2O_2 --> CO_2 + 2H_2O

Explanation:

The chemical formula for methane is CH_4

The chemical formula for oxygen is O_2

The chemical formula for carbon dioxide is CO_2

The chemical formula for water is H_2O

Methane burns in oxygen to give carbon dioxide and water:

CH_4 + O_2 --> CO_2 + H_2O

The balanced equation that will ensure an equal number of each atom on the left and right-hand sides of the equation would be:

CH_4 + 2O_2 --> CO_2 + 2H_2O

3 0
3 years ago
A quantity of HCL ( 1.5*10⁻³ M) is added to water at 25°C to increase the hydrogen ion concentration from 1*10⁻⁷ to 1.5* 10⁻³ mo
algol13
Do you have a paper?
3 0
3 years ago
Other questions:
  • Which statement best explains how isotopes can have different masses and still be the same element?
    12·1 answer
  • In the physical science lab, Kim and Dawn added small pieces of magnesium to hydrochloric acid. They observed that bubbles forme
    8·1 answer
  • What are the requirements for combustion of a candle?
    15·1 answer
  • ______________ is a durable metal and is widely used for casting, which is a process by which melted metal is poured into a mold
    11·1 answer
  • The equal areas law is kelpers 2nd law of planetary motion its states that ?
    12·1 answer
  • If 35.7 kPa of Bromine gas takes up 41.3 L, how much volume will the gas take up at 13.8 kPa
    10·1 answer
  • 3. How do you think this experiment would be different if more powerful magnets were<br> used?
    11·1 answer
  • Give an example of a reversible change.<br><br><br><br><br><br>Don't spam pls _/\_​
    11·2 answers
  • What net force is required to acceleterate car at a rate of 2 m/s² if the car has a mass of 3,000 kg​
    6·2 answers
  • (10th grade adv chem dimensional analysis 1)
    5·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!