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
Jobisdone [24]
3 years ago
9

What is the density of a cube that has a mass of 25 g in a volume of 125 cm 3

Chemistry
1 answer:
GalinKa [24]3 years ago
3 0

<span>The density of an object is defined to be its mass divided by the volume it occupies. For this problem, the mass of the cube was given to be 25 g while its volume is 125 cm</span>³. Thus, we simply divide 25 g by 125 cm³ to get the object’s density. We then calculate that the cube has a density of 0.2 g/ cm³.

You might be interested in
Is magnetism, reactivity, and fluorescence used to identify minerals
valkas [14]
Yes it is used , hope this helps
6 0
3 years ago
How the ph values can be used to compare the strength of hydrochloric acid and ethanoic acid?
devlian [24]
An aqueous solution of hydrozen chloride: Strongly​ corrosive acids
A colouriess punpent liquid widely used in manufacturing plastic and pharmaceutical
3 0
3 years ago
How much heat in kj is released by burning 9.5 grams of methane?
tatyana61 [14]
Methane is the compound CH4, and burning it uses the reaction:

CH4 + O2 -> CO2 + H2O, which is rather exothermic. To find the heat released by burning a certain amount of the substance, you should look at the bond enthalpy of each compound, and then compare the values before and after the reaction. In methane, there are 4 C-H bonds, which have bond energy of 416 kj/mol, resulting in a total bond energy of 1664 kj/mol. O2 is 494 kj/mol. Therefore we have a total of 2080 kj/mol on the left side. On the right side we have CO2, which has 2 C=O bonds, each at 799 kj/mol each, resulting in 1598 kj/mol, and H2O has 2 O-H bonds, at 459kj/mol each, resulting in a total of 2516 kj/mol on the right hand side. Now, this may be confusing because the left hand side seems to have less heat than the right, but you just need to remember: making minus breaking, which results in a total change of 436kj/mol heat evolved.

Now it is a simple matter of find the mols of CH4 reacted, using n=m/mr.

n = 9.5/16.042 = 0.592195 mol

Therefore, if we reacted 0.592195 mol, and we produced 436 kj for one mol, the total amount of energy evolved was 436*<span>0.592195 kj, or 258.197 kj.</span>
7 0
3 years ago
Which substance can be broken down by chemical means?
sp2606 [1]
The substance that can be broken down by chemical means from the choices given is CO (Carbon monoxide). Carbon monoxide is a compound made up of carbon and oxygen and can therefore be broken by chemical means.
7 0
3 years ago
Which one is the right one dont mine the one i put that one is wrong
Degger [83]

Answer: The answer is B

Explanation:

7 0
2 years ago
Other questions:
  • What is one major difference between electromagnetic and mechanical waves?
    10·1 answer
  • What is the function of a restriction enzyme?
    6·1 answer
  • #18: all atoms of the same element have the same<br> a)number of neutrons<br> b)atomic number
    11·1 answer
  • Someone help with this please
    9·1 answer
  • An air-filled balloon has a volume of 225 L at 0.940 atm and 25 °C. Soon after, the pressure changes to 0.990 atm and the temper
    5·1 answer
  • Do you expect the ionization energies of anions of group 17 elements to be lower than, higher than, or about the same for neutra
    13·1 answer
  • Each of the following reactions is allowed to reach equilibrium in a sealed container. For which of the reactions could you shif
    10·2 answers
  • Converts chemical energy into mechanical energy
    8·1 answer
  • How are the scientific method and the engineering method similar?
    5·1 answer
  • Kingdom:
    15·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!