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
faltersainse [42]
3 years ago
8

Defined the following convection

Chemistry
1 answer:
photoshop1234 [79]3 years ago
7 0

Answer:

Convection is the process of heat transfer in which hotter and therefore less dense matter floats to the top, while cooler and therefore more dense material sinks to the bottom to absorb heat.

Explanation:

Convection is one form of heat transfer; other forms include conduction and (heat) radiation (not exactly the same as the kind uranium emits).

This form of heat transfer is characterised by a use of current in a liquid, in which the sinking and rising create a current which has a shape of a loop.

This requires an outside source of heat, since to sustain the current, once the heated fluid rises up, it must lose heat to the environment to sink, but to rise it must gain heat again.

You might be interested in
What is the precipitation reaction of sodium nitrate and lead (II)?
Vadim26 [7]
The precipitation reaction of sodium nitrate and lead (II) chloride would not happen. No reaction will happen between these substances. Hope this answers the question. Have a nice day.
8 0
3 years ago
All the bases are not alkali ​why
Vanyuwa [196]

Alkali are soluble bases, however not all bases are soluble in water, therefore not all bases are Alkali.

6 0
3 years ago
Read 2 more answers
An acidic fog in pasadena was found to have a ph of 2.50. which expression represents this ph measurement?
joja [24]

Supposing a temperature of 25 degrees and supposing that all activity coefficients are 1 

pH = -log[H+] 
pOH = -log[OH-] 
pH + pOH = 14 

Thus a pH of 2.50 would mean that the [H+], the concentration of the hydrogen ion, would be 10^(-2.50) 

pH + pOH = 14 
pOH = 14 - pH = 14 - 2.5 = 11.5 
MOH- levels would be coordinated with pOH 
pOH = -log[OH-] ==> [OH-] = [MOH-] = 10^-pOH = 10^-11.5 = 3.2 x 10^-12 

Therefore, MOH¯ = 3.2 × 10¯12 M 

5 0
3 years ago
The Henry's law constant (kH) for O2 in water at 20°C is 1.28 × 10−3 mol/(L·atm). (a) How many grams of O2 will dissolve in 4.00
Burka [1]

Answer:

Solubility of O₂(g) in 4L water = 3.42 x 10⁻² grams O₂(g)

Explanation:

Graham's Law => Solubility(S) ∝ Applied Pressure(P) => S =k·P

Given P = 0.209Atm & k = 1.28 x 10⁻³mol/L·Atm

=> S = k·P = (1.28 x 10⁻³ mole/L·Atm)0.209Atm = 2.68 x 10⁻³ mol O₂/L water.

∴Solubility of O₂(g) in 4L water at 0.209Atm = (2.68 x 10⁻³mole O₂(g)/L)(4L)(32 g O₂(g)/mol O₂(g)) = <u>3.45 x 10⁻² grams O₂(g) in 4L water. </u>

4 0
3 years ago
Calculate the molality of an ethylene glycol (C2H6O2) soltuion, that has a molarity of 2.07 M. The density of the solution is 1.
vlada-n [284]

Answer:

2.03

Explanation:

Let's <u>assume we have 1 L of the solution</u>:

  • There would be 2.07 ethylene glycol moles.
  • The solution would weigh (1000 mL * 1.02 g/mL) = 1020 g.

With that information we can <u>calculate the molality</u>:

  • molality = moles of solute / kg of solvent
  • molality = 2.07 moles / (1020 ÷ 1000) = 2.03 m

Keep in mind that this is only an estimate, as we used the kg of the solution and not of the solvent.

3 0
2 years ago
Other questions:
  • Digestion is the process of breaking down food into substances that the can use. Which of the following is a physical change tha
    12·2 answers
  • True or False: All cells have different basic chemical composition. *<br> True<br> False
    14·2 answers
  • An electron is a negatively charged subatomic particle.<br> Question 3 options:<br> True<br> False
    6·1 answer
  • What is the density of water if you have 50.0 grams of water and a volume of 50.0 millimeters
    14·1 answer
  • Rank the following atoms in order of increasing electronegativity.a. Se, O, S b. P, Na, Cl c. Cl, S, F d. O, P, N
    11·1 answer
  • Calculate the average time the car took to reach each checkpoint. Record the average time in Table D of your Student Guide. The
    9·2 answers
  • As the temperature of water increases its density
    9·2 answers
  • AgNO3 is a useful chemical that has many applications and can undergo a variety of reactions. In the following examples, balance
    12·1 answer
  • The observation that 20g of hydrogen gas always combines with 160g of oxygen gas to form 180g of water, even when there is more
    9·1 answer
  • Is gunpowder a homogenous mixture or a heterogenous mixture? Explain why.
    8·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!