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
alina1380 [7]
3 years ago
5

Bromine has two isotopes 79Br and 81Br, whose masses (78.9183 and 80.9163 amu) and abundances (50.69% and 49.31%, respectively)

were determined in earlier experiments. Calculate the average atomic mass of bromine based on these experiments.
Chemistry
1 answer:
Reika [66]3 years ago
4 0

Answer:

Average atomic mass = 79.9034 amu

Explanation:

The formula for the calculation of the average atomic mass is:

Average\ atomic\ mass=(\frac {\%\ of\ the\ first\ isotope}{100}\times {Mass\ of\ the\ first\ isotope})+(\frac {\%\ of\ the\ second\ isotope}{100}\times {Mass\ of\ the\ second\ isotope})

Given that:

<u>For first isotope: </u>

% = 50.69 %

Mass = 78.9183 amu

<u>For second isotope: </u>

% = 49.31 %

Mass = 80.9163 amu

Thus,  

Average\ atomic\ mass=\frac{50.69}{100}\times {78.9183}+\frac{49.31}{100}\times {80.9163}\ amu

Average\ atomic\ mass=40.0036+39.8998\ amu

<u>Average atomic mass = 79.9034 amu</u>

You might be interested in
Which best represents a reaction mechanism?
PIT_PIT [208]
A + B = Products
This is the correct mechanism.
6 0
3 years ago
Explain the results for the tube in which 1.0 m naoh was added to benzoic acid. write an equation for this, using complete struc
nikklg [1K]

When sodium hydroxide (NaOH) is added to benzoic acid (CC_{6}H_{5}COOH), sodium benzoate and water (H_{2}O) are formed because benzoic acid is weak acid and NaOH is strong base. The reaction is shown in diagram 1. To the tube of sodium benzoate, if 6 m HCl is added, sodium benzoate salt will react with HCl and produce benzoic acid and sodium chloride, NaCl. The reaction is shown in diagram 2.

5 0
3 years ago
Use the following reaction: 2AICI, -&gt; 2Al + 3Cl2
frozen [14]

Answer:

B.

1.064 grams CI2

Explanation:

Hope this helps:)

5 0
3 years ago
Which three of the five items would be best to include in a safety contract?
ValentinkaMS [17]
Student Safety Contract - Flinn Scientific
ties which require the use of hazardous chemicals. Safety in ... vided to you in this student safety contract. ... 3. Never work alone. No student may work in the laboratory without an instructor ... Look for things such as.
Missing: five ‎| Must include: five
7 0
3 years ago
Read 2 more answers
Why should you avoid the flammable range for a chemical?
mina [271]

The air is too "rich" to burn above the upper limit, but the situation might soon deteriorate into danger: For instance, increasing the air in a space can quickly reduce the product's vapor percentage to levels that are within its flammability range, which could have explosive effects.

<h3>Why should we handle combustible materials carefully?</h3>

Flammable liquids and gases need to be handled and stored carefully since they have low flash points. Never assume that these items won't catch fire. You must continually keep in mind the safety precautions for handling and storing combustible products if you want to keep both you and your company safe.

<h3>What must be kept out of the vicinity of combustible chemicals?</h3>

To prevent them from getting engaged and stoking a fire, combustible objects including cardboard, paper towels, sawdust, and waste must be kept away from flammable storage spaces. All flammable liquid containers must be kept closed while not in use to further help avoid fires.

learn more about  flammable chemical here

brainly.com/question/8991581

#SPJ4

6 0
2 years ago
Other questions:
  • Classify these elements by whether they get oxidized or reduced in the reactions shown here: 2Ca(s)+ O 2 (g) F 2 (g)+2Li(s) → →
    8·1 answer
  • The composition of rocks affects their densities and the densities of Earth’s layers. Use what you have learned and the informat
    6·2 answers
  • Can someone help me with chemistry?
    13·2 answers
  • Plant A gets no fertilizer, plnt B-5mg/day, and plnt C-10mg/day. Which is the control group?
    8·1 answer
  • Determine the acid dissociation constant for a 0.020 m formic acid solution that has a ph of 2.74. formic acid is a weak monopro
    8·1 answer
  • Magnesium has three naturally occurring isotopes with masses of 23.99 amuamu, 24.99 amuamu, and 25.98 amuamu and natural abundan
    12·2 answers
  • The balanced combustion reaction for C6H6 is 2C6H6(l)+15O2(g)⟶12CO2(g)+6H2O(l)+6542 kJIf 8.700 g C6H6is burned and the heat prod
    12·1 answer
  • What is a "whale fall"
    12·1 answer
  • A) moles are in a 60-gram sample of NaCl?​
    6·1 answer
  • CALCULATE the no of atoms in 0.6g of Ca ?
    14·2 answers
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!