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
Mademuasel [1]
2 years ago
11

What is the mass number of an oxygen isotope that has nine neutrons.

Chemistry
1 answer:
Aleks04 [339]2 years ago
3 0

Answer: This isotope is oxygen-17.

You might be interested in
Find the density of metal with a volume 4.0 cm and a mass of 8.0 grams.
olga_2 [115]
D=m/v

so,

d=8.0g/4.0cm

d=2

3 0
2 years ago
What are the molality and mole fraction of solute in a 22.3 percent by mass aqueous solution of formic acid (HCOOH)?
Vanyuwa [196]

Answer:

Mole fraction for solute = 0.1, or 10%

Molality = 6.24 mol/kg

Explanation:

22.3% by mass → In 100 g of solution, we have  22.3 g of HCOOH

Mass of solution = 100 g

Mass of solute = 22.3 g

Mass of solvent = 100 g - 22.3g = 77.7 g

Let's convert the mass to moles

22.3 g . 1mol/ 46 g = 0.485 moles

77.7 g. 1mol / 18 g = 4.32 moles

Total moles = 4.32 moles + 0.485 moles = 4.805 moles

Xm for solute = 0.485 / 4.805 = 0.100 → 10%

Molality → mol/ kg → we convert the mass of solvent to kg

77.7 g.  1 kg / 1000g = 0.0777 kg

0.485 mol / 0.0777 kg = 6.24 m

6 0
3 years ago
Read 2 more answers
How is an oscilloscope used to tune a musical instrument?
sp2606 [1]
It uses the voltages and sound freq. in the air to measure the wave lengthths
4 0
3 years ago
The image shows a molecular model of a compound using balls and sticks. Each ball is an atom and each stick is a bond. If you we
Zielflug [23.3K]
Hi , the answers must be part B
3 0
2 years ago
Read 2 more answers
What other kinds of allotropes are there? What kinda of properties and atomic bonds do they have?
Cloud [144]
Diamond and <span>Graphite are some allotropes. 

btw love your icon of Harry :)</span>
7 0
3 years ago
Other questions:
  • At what temperature will 2.40 moles of chlorine gas exert a pressure of 2.70 atm at a volume of 0.750 L?
    9·2 answers
  • A graduated cylinder( approximate as a regular cylinder) has a radius of 1. 045 cm and a high of 30.48 cm. what is the volume of
    9·1 answer
  • To aid in the prevention of tooth decay, it is recommended that drinking water contains 0.900 ppm fluoride (F-). A) How many g o
    15·1 answer
  • Thermal transfer by convection takes place in materials that are what?
    6·2 answers
  • What happens to metal railroad tracks during the heat of a summer day?
    12·2 answers
  • Draw the structural formula for a hydrogen molecule (H2) and an oxygen molecule (O2). Remember that each line represents an elec
    14·2 answers
  • Examine the scenario.
    14·1 answer
  • A scientist develops a new experiment to test atomic theory. His results do not agree with the theory.
    11·1 answer
  • Why are the group I elements are very active​
    6·1 answer
  • Write the formula the alkenes that contain four,six,eight and ten carbon atoms​
    15·2 answers
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!