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
o-na [289]
2 years ago
5

A sample of As weighs 73.2 grams. Will a sample of Kr that contains the same number of atoms weigh more or less than 73.2 grams?

(more, less): Calculate the mass of a sample of Kr that contains the same number of atoms. grams of Kr
Chemistry
1 answer:
My name is Ann [436]2 years ago
8 0

Answer:

This means a sample of 73.2 grams As atoms weighs less than the same amount of Kr atoms

Explanation:

Step 1: Data given

Mass of As = 73.2 grams

Molar mass As = 74.92 g/mol

Molar mass of Kr = 83.80 g/mol

Step 2: Calculate moles As

Moles As = Mass As / molar mass As

Moles As = 73.2 grams . 74.92 g/mol

Moles As = 0.977 moles

Step 3: Calculate As atoms

As atoms = moles As * number of Avogadro

As atoms = 0.977 moles * 6.02 * 10^23

As atoms = 5.88 *10^23 As atoms

Step 4: Calculate moles Kr

Moles Kr = Atoms Kr / number of Avogadro

Moles Kr = 5.88 * 10^23 Kr atoms / 6.02 *10^23

Moles Kr = 0.977 moles

Step 5: Calculate mass Kr

Mass Kr = moles Kr * molar mass Kr

Mass Kr = 0.977 moles * 83.80 g/mol

Mass Kr = 81.9 grams

This means a sample of 73.2 grams As atoms weighs less than the same amount of Kr atoms

You might be interested in
a problem or issue in a human or natural environment caused by chemical reactions. Plz give me the URL as well.
MArishka [77]
The problem or issue in a human or natural environment caused by chemical reactions would be smog. It is a kind of air pollution, originally named for the mixture of smoke and fog in the air.  <span>The atmospheric pollutants or gases that form </span>smog <span>are released in the air when fuels are burnt. When sunlight and its heat react with these gases and fine particles in the atmosphere, it is formed.</span>
5 0
3 years ago
Disease caused by virus are more dangerous.Why?
nlexa [21]

Answer:

Explanation:

1. Virus's are hard to detect because of their simple construction.

2. Some mutate very easily.

3. It is hard to isolate the virus and kill it without doing damage to the host.

7 0
3 years ago
What is the molecular weight of water? (numbers only, to nearest 0.1)
yulyashka [42]

The molecular weight of a substance is calculated by adding the molecular mass of each element present in the molecule multiplied by the number of times each element is in the molecule. For greater clarity, we can organize a table that allows us to do the calculations. We have the following structure for water:

The molecular weight of water will be:

2.01568 + 15.999 = 18.0468=18.0 g/mol

Answer= 18.0

4 0
1 year ago
What does a bomb calorimeter do?
Sunny_sXe [5.5K]
It is a constant-volume type calorimeter that measures the heat of a particular reaction or measures the calorific value of the fuels. Bomb calorimeters are built in such a way that they can withstand the large pressure produced within the calorimeter due to the reaction or burning of fuel.
7 0
3 years ago
Read 2 more answers
Describe two ways you think a sound wave could be stopped or could change change direction.
Alla [95]

Answer:

Like any wave, a sound wave doesn't just stop when it reaches the end of the medium or when it encounters an obstacle in its path. Rather, a sound wave will undergo certain behaviors when it encounters the end of the medium or an obstacle. Possible behaviors include reflection off the obstacle, diffraction around the obstacle, and transmission (accompanied by refraction) into the obstacle or new medium

8 0
3 years ago
Read 2 more answers
Other questions:
  • How would technology affect the population growth rate?
    5·2 answers
  • Which of the following is not a part of Darwin’s theory of evolution?
    9·2 answers
  • Which physical property of water best allows solutes dissolved in it to be separated using simple distillation?
    13·2 answers
  • A water molecule collides with a sugar molecule. What type of energy
    12·1 answer
  • Standard heats of formation for reactants and products in the reaction below are provided. 2 HA(aq) + MX2(aq) → MA2(aq) + 2 HX(l
    13·1 answer
  • Is ice melting a physical change or a chemical change and why
    8·2 answers
  • Which of the following is classified as a ionic compound
    8·1 answer
  • How many moles are found in a 100.0 g sample of CuF2?
    8·2 answers
  • An organic compound is classified as aromatic if it cyclic and has a fragrant odor true or false
    14·1 answer
  • The student then takes a 1.00M stock solution of table sugar (sucrose C12H22O11) and mixes 0.305L of stock solution with additio
    12·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!