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
Ostrovityanka [42]
3 years ago
11

The density of butter is 0.86 g/cm3. what is the mass of 240 cm3 of butter?

Chemistry
1 answer:
olga nikolaevna [1]3 years ago
8 0

Answer:

mass= 206.4 g

Explanation:

Density= mass/volume

0.86=x/240

x=240×0.86

=206.4g

You might be interested in
An element's atomic number is 68. How many protons would an atom of this element have?
Evgen [1.6K]
Answer: 68.

Explanation:

The atomic number is the number that idenfities an element.

The atomic number is the number of protons of an element.

Every element has a different number of protons.

The elements are arranged in the periodic table as per their atomic number (number of protons).

The first element is hydrogen (H), its atomic number is 1, and it has 1 proton.

The second element is helium (He), its atomic number is 2 (it has 2 protons)-

Those two elements form the first period (row) of the periodic table.

The second row (period) has the elements Li, Be, B, C, N, O, F and Ne, whose respective atomic numbers (number of protons are) 3, 4, 5, 6, 7, 8, 9, and 10, respectively.

And so, you may idenfity each of the 118 elements known, with a different atomic number (number of protons).
4 0
3 years ago
Read 2 more answers
Does Mitosis have body cells or sex cells?
Rufina [12.5K]
2 identical daughter cells
5 0
3 years ago
Is zinc carbide a metallic bond?
Feliz [49]
Metallic bonds are found in metals like zinc.
3 0
2 years ago
Calculate the change in the entropy of the system and also the change in the entropy of the surroundings, and the resulting tota
Ghella [55]

Answer:

(a) ΔS_{sys}  = 2.881 J/K; ΔS_{sur}  = -2.881 J/K; total change in entropy = 0

(b)ΔS_{sys}  = 2.881 J/K; ΔS_{sur}  = 0 ; total change in entropy = 2.881 J/K

(c) ΔS_{sys}  = 0 ; ΔS_{sur}  = 0 ; total change in entropy = 0

Explanation:

In the given problem, we need to calculate the change in the entropy of the system and also the change in the entropy of the surroundings, and the resulting total change in entropy, when a sample of nitrogen gas of mass 14 g at 298 K and 1.00 bar doubles its volume. We have the following variable:

mass (m) = 14 g

Temperature = 298 K

Pressure = 1.00 bar

Initial volume = V_{1}

Final volume = V_{2} = 2V_{1}

(a) Change in entropy of the system ΔS_{sys} = nRIn\frac{V_{2} }{V_{1} }

where R = 8.314 J/(mol*K)

n = number of moles = mass/molar mass = 14/ 28 = 0.5 moles

ΔS_{sys} = 0.5*8.314*ln2 = 2.881 J/K

Change in entropy of the surrounding ΔS_{sur} = -2.881 J/K

Therefore, for a reversible process, the total change in entropy = ΔS_{sys}+ΔS_{sur} = 2.881 - 2.881 = 0

(b) Because entropy is a state function, we use the same procedure as in part (a). Thus, ΔS_{sys}  = 2.881 J/K

Since surrounding does not change in this process ΔS_{sur} = 0.

total change in entropy = ΔS_{sys}+ΔS_{sur} = 2.881 - 0 = 2.88 J/K

(c) For an adiabatic reversible expansion, q(rev) = 0, thus:

ΔS_{sys}  = 0

Since heat energy is not transferred from the system to the surrounding

ΔS_{sur}  = 0

total change in entropy = ΔS_{sys}+ΔS_{sur} = 0

6 0
2 years ago
Consider the two electron arrangements for neutral atoms A and B. What is the atomic number of A?
Andreas93 [3]
Your answer is B: The outer electron of Adam B has moved to a higher energy state
8 0
3 years ago
Other questions:
  • How are elements and compounds similar
    6·2 answers
  • Glass or concrete has the better sound reflector?​
    13·1 answer
  • How can a scientist minimize bias in a scientific investigation
    5·1 answer
  • What is the mole ratio of fe304 to fe?
    6·1 answer
  • Place the following in order of increasing F-A-F bond angle, where A represents the central atom in each molecule. PF3 OF2 PF4
    7·1 answer
  • 2.A fisherman in a boat is drinking hot coffee. The large lake below his boat is full of cold water. Which statement is an accur
    5·1 answer
  • What is the mass of 187 liters of CO2 gas? The volume is measured at STP.
    9·1 answer
  • How is your day today?
    7·2 answers
  • How many molecules of CH4 are in 24.1 g of this compound?
    7·1 answer
  • A benefit of using nuclear energy could be the abundance of uranium in nature. which human risk about mining is the most importa
    9·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!