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
AleksAgata [21]
3 years ago
13

You add 7.8 g of iron to 20.70 mL of water and observe that the volume of iron and water together is 21.69 mL . Calculate the de

nsity of iron.
Chemistry
1 answer:
bixtya [17]3 years ago
4 0
21.69mL - 20.70mL = .99mL Fe
7.8 g / .99 mL = 7.9g/mL 
You might be interested in
As atoms get smaller,valance electrons are getting closer or farther away from the nucleous.The force of attraction is stronger
LiRa [457]

Explanation:

Electrons are closer to the nucleus are in filled orbitals and are called core electrons. More energy which in nucleus called nuclear strOng energy to remove electron thars why its also a way harder too..

3 0
2 years ago
Radar detectors use radio waves to measure the speed of moving
bagirrra123 [75]

Answer:

1.7x10^8 Hz

Explanation:

Frequency could be explained as the number of occurrences of a repeating event at a time

Given:

wavelength = 1.8 meters

The frequency f of the waves can be calculated using f = c / λ

Where c (m/s) is the speed of the wave

λ (m) is the wavelength

Speed c= 3*10^8 m/s

Frequency f= 3*10^8 /1.8

Frequency= 1.7x10^8 Hz

Therefore,the frequency of waves from a radar detector is 1.7x10^8 Hz

6 0
2 years ago
What is the name of this unstable isotope from number 9?
raketka [301]

Is there a picture of the isotope or?- becaue I can’t help if I don’t have a visual.

6 0
2 years ago
Read 2 more answers
What is the relationship between the concentration and the rate of the reaction?
zalisa [80]

Answer:

When the concentration of all the reactants increases, more molecules or ions interact to form new compounds, and the rate of reaction increases. When the concentration of a reactant decreases, there are fewer of that molecule or ion present, and the rate of reaction decreases.

3 0
2 years ago
When the Moon moves between the Sun and Earth and casts a shadow on Earth's surface, there is a(n)
allochka39001 [22]
Hi , the answer is D because the moon is blocking the sun s rays .
<span />
5 0
2 years ago
Other questions:
  • Example of gas gas mixture
    9·1 answer
  • What is the extended and shortened structural formula for 2-methylpentane
    15·1 answer
  • Unabbreviated electron configuration of magnesium
    11·1 answer
  • A potassium iodide compound is represented by which formula?
    13·2 answers
  • 3. What characteristics of lumpfish make them unique? (Select all that apply.)
    14·2 answers
  • What can you determine about an element if you only know its group number on the periodic table?
    6·2 answers
  • PREDICT Why do you think energy must be added to change carbon powder into a<br> synthetic diamond?
    5·1 answer
  • Whats the molar mass of CO
    10·2 answers
  • The atomic number of an atom is the number of ______ in the atom's nucleus. *
    5·1 answer
  • What volume of a 3.95 M
    10·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!