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
kherson [118]
2 years ago
6

A dark grey rock has a mass of 80 grams. When dropped in water, it makes the water level rise from 70 mL to 90 mL. What is the d

ensity of the rock?
Chemistry
2 answers:
leonid [27]2 years ago
7 0

Answer:

The density of the rock is 4 g/mL

Explanation:

The formula to be used here is that of density as shown below

Density = mass ÷ volume

From the question, the mass of the dark grey rock is 80 grams

The volume of the rock is 90 mL - 70 mL = 20 mL (the reason for subtracting is because we concerned about the volume of the rock and not the volume of the water, thus when the rock caused a rise in the volume of the water, that "rise" is the volume of the rock.

Density = 80 ÷ 20

Density = 4 g/mL

The density of the rock is 4 g/mL

podryga [215]2 years ago
5 0

Answer:

I don't remember how to label it, but it is 20.

Explanation:

The answer is 20 because once you dat the rock in the water, that is how much it changed.

You might be interested in
What color would litmus paper turn in a solution of baking soda? Explain your answer in terms of pH.
madam [21]
Blue

When red litmus paper comes into contact with any alkaline substance, it turns blue. Some examples of alkaline substances are ammonia gas, milk of magnesia, baking soda and limewater.
3 0
2 years ago
Suppose 180 ml of 3.52x10^-4 M NaOH is mixed with 220 mL of 2.47x10^-4 M MgCl2.
velikii [3]
When in water, MgCl2 dissociates into magnesium ions and Cl- ions and NaOH into Na and OH ions. The equation is as follows:

MgCl2 = Mg2+ + 2Cl-
NaOH = Na+ + OH-

The initial concentrations are as follows:

[Mg2+] = .220(<span> 2.47x10^-4) / .220+.180 = 1.36x10^-4 M Mg2+
</span>[OH-] = .180 (3.52x10^-4) / .220+.180 = 1.58x10^-4 M OH-
6 0
3 years ago
_________ are rocky materials mixed with very thick oil.
True [87]

Tar pits.

Need more help? Join our growing community here: https://questioncove.com/invite/098ZDB

4 0
3 years ago
Read 2 more answers
2Al+3Cl2⟶2AlCl3
Leviafan [203]

Answer:

7.335 moles of  Cl₂ are required to react with 4.89 miles of Al.

Explanation:

Given data:

Moles of Al = 4.89 mol

Number of moles of Cl₂ required = ?

Solution:

Chemical equation:

2Al + 3Cl₂    →   2AlCl₃

Now we will compare the moles of Al and chlorine from balance chemical equation.

                            Al           :         Cl₂

                             2           :           3

                            4.89      :         3/2×4.89 =7.335 mol

Thus, 7.335 moles of  Cl₂ are required to react with 4.89 miles of Al.        

8 0
2 years ago
Chemical properties of sodium
Svetlanka [38]

Answer:

Density 0.97 g.cm -3 at 20 °C

Melting point 97.5 °C

Boiling point 883 °C

oxidation states +1, −1 (rare)

Explanation:

Have a nice day

5 0
2 years ago
Other questions:
  • The following thermodynamic data are available for octane, oxygen gas, carbon dioxide gas, water, and water vapor: Molecule ΔH∘f
    9·2 answers
  • At this lower concentration, about how many extra hydrogen bonds would be needed to hold a and b together tightly enough to form
    7·1 answer
  • Propose a mechanism for the following reaction.
    7·1 answer
  • What is the empirical formula of a compound containing 12 g of carbon, 2 g of hydrogen, and 16 g of oxygen only
    15·1 answer
  • How do people and water affect each other?
    11·2 answers
  • When was that one moment when you laughed the hardest
    11·2 answers
  • Which choice describes the function of the pancreas gland?
    8·1 answer
  • HELLP: WHAT IS THE 10 ORGANIZATIONS OF MATTER???<br><br><br> WILL GIVE BRAINLEST
    15·1 answer
  • The heat of a reaction may be found with the equation q=mc triangle T. A 951 g sample of carbon steel with a specific heat capac
    6·2 answers
  • The law of conservation of mass​
    5·2 answers
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!