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
dezoksy [38]
3 years ago
11

a cork is able to float on water because it is A: a crystalline sold B: equal density to water C: small in size D:less dense tha

n the water
Chemistry
2 answers:
Radda [10]3 years ago
7 0
It's most likely less dense than the water
rjkz [21]3 years ago
6 0
D.Less dense than water. Cork has a density of 0.24g/cm³. Water has a density of about 1g/cm³. 

Another example:  Ice floats in water because the density of ice is less than the density of water( 1g/cm³). Ice has a density of 0.92 g/cm³. 
You might be interested in
C) Mercury is solid at room temperature....True Or False<br>​
Zielflug [23.3K]

Answer:

true

Explanation:

Because Mercury can be solidified when its temparature us brought to its freezing point. However, when returned to room temparature conditions, mercury does not exist in solid state for long, and returns back to its more common liquid form.

7 0
3 years ago
A helium-filled balloon at 310.0 K and 1 atm, contains 0.05 g He, and has a volume of 1.21 L. It is placed in a freezer (T = 235
trapecia [35]

Answer : The value of \Delta E of the gas is 2.79 Joules.

Explanation :

First we have to calculate the moles of helium.

\text{Moles of helium}=\frac{\text{Mass of helium}}{\text{Molar mass of helium}}

Molar mass of helium = 4 g/mole

\text{Moles of helium}=\frac{0.05g}{4g/mole}=0.0125mole

Now we have to calculate the heat.

Formula used :

q=nc_p\Delta T\\\\q=nc_p(T_2-T_1)

where,

q = heat

n = number of moles of helium gas = 0.0125 mole

c_p = specific heat of helium = 20.8 J/mol.K

T_1 = initial temperature = 310.0 K

T_2 = final temperature = 235.0 K

Now put all the given values in the above formula, we get:

q=nc_p(T_2-T_1)

q=(0.0125mole)\times (20.8J/mol.K)\times (235.0-310.0)K

q=-19.5J

Now we have top calculate the work done.

Formula used :

w=-p\Delta V\\\\w=-p(V_2-V_1)

where,

w = work done

p = pressure of the gas = 1 atm

V_1 = initial volume = 1.21 L

V_2 = final volume = 0.99 L

Now put all the given values in the above formula, we get:

w=-p(V_2-V_1)

w=-(1atm)\times (0.99-1.21)L

w=0.22L.artm=0.22\times 101.3J=22.29J

conversion used : (1 L.atm = 101.3 J)

Now we  have to calculate the value of \Delta E of the gas.

\Delta E=q+w

\Delta E=(-19.5J)+22.29J

\Delta E=2.79J

Therefore, the value of \Delta E of the gas is 2.79 Joules.

3 0
3 years ago
What law of motion does this picture represent
alukav5142 [94]

Answer: none

Explanation: there is no picture attached

7 0
3 years ago
Identify the major ionic species present in an aqueous solution of nh4clo4.
elena-s [515]
7 strong acids are strong electrolytesHCl, HBr, HI, HNO3, HCIO3, HCIO4, and H2SO4
3 strong bases are strong electrolytes<span>OH, KOH, and NaOH</span>
3 0
3 years ago
A certain type of material allows electricity to flow through it, but it does not flow quickly or easily through it. Is the mate
Deffense [45]
A substance through which an electrical current flows poorly would be said to be a poor conductor. That is, the substance has a low conductance (or conductivity). There’s a nuance between the two terms, but it shouldn’t matter for our purposes.

Since such a material resists the flow of electric charge, the material can be said to have a high resistance (or high resistivity).

Mathematically, resistance and conductance are reciprocals of one another; a low conductance implies a high resistance, and a high conductance implies a low resistance.
6 0
3 years ago
Other questions:
  • If you are told that one of them is Cr2O3 and the other is OsO4, which one do you expect to be the yellow solid?
    15·2 answers
  • Which of the following are weak electrolytes in water
    5·2 answers
  • A student was asked to find the molar mass of calcium nitrate, Ca(NO3)2. she added the molar masses of calcium, nitrogen, and ox
    9·1 answer
  • Calculate the amount in grams of Na2CO3 needed in a reaction with HCl to produce 120g NaCl?
    15·1 answer
  • You have identified your product to be butylnapthyl ether and recrystallize it. The initial mass of the the crude ether was 171
    8·1 answer
  • Find the theoretical probability of randomly choosing a vowel from the alphabet. 5/25 5/26 4/25 4/26
    9·1 answer
  • I’ll give the Brainliest
    8·2 answers
  • This is a test please help
    14·1 answer
  • How many moles of oxygen are present in 16 g of oxygen gas​
    15·2 answers
  • If the bag was made from a metal (like sturdy aluminum foil), do you think it would lose its heat faster or slower than the plas
    8·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!