As the pressure on the surface of a liquid decreases, the temperature at which the liquid will boil(1) decreases
(2) increases
(3) remains the same
Answers
Answer: option (1) decreases.
Explanation:
May be you have experienced that: when you go to the beach, where the atmposhpere pressure is greater than the atmosphere pressure in places that are at higher altitudes, the water takes longer to boil. That is because the boiling temperature is greater, and you need more total heat (more time) to permit the liquid to reach that temperature.
The reason why that happens is because substances boil when the vapor pressure (the pressure of the particles of vapor over the liquid) equals the atmosphere pressure. So, when the atmposhere pressure increases, the temperature at which the vapor pressure reaches the atmosphere pressure also increases, and when the atmosphere pressure decreases, the temperature at which the vapor pressure reaches the atmosphere pressure decreases.
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The pressure of 1 mol of gas is decreased to 0.5 atm at 273 K. What happens to the molar volume of the gas under these conditions?
- Use 6.022x1023 for avogadro’s number
- Ignore sig figs and do not round the final answer.
- Keep it to 1 decimal place.
Answers
Answer:
a) 13.2 moles
b) 79.33 grams of
Explanation:
First, we'll need to balance the equation
→
There are 2 (O) on the left and only one on the right, so we'll add a 2 coefficient to the right.
→
Now there are 4 (H) on the right and only 2 on the left, so we'll add a 2 coefficient to the () on the left.
→
The equation is now balanced.
a) This can be solved with a simple mole ratio.
4.6 moles ×
= 13.2 moles
b) This problem is solved the same way!
2.2 moles ×
= 2.2 moles
However, this problem wants the mass of , not the moles.
The molecular weight of is the weight of 4 (H) molecules and 2 (O) molecules (found on the periodic table). So,
4(1.008) + 2(15.999) = 36.03 g/mol
2.2 moles ×
= 79.33 grams of
Answers
Hope this helped :)
Answers
Define ductility.
State one reason gold is used in jewelry.
Why is mercury no longer used in many devices?
What are the properties of nonmetals?
List the states of matter in which nonmetals can exist and give one example of each state.
What are the physical properties and uses of sulfur?
What are the physical properties and uses of bromine?
What are the physical properties and uses of helium?
Define “metalloid.”
Why would it be difficult to decide whether or not an element was a metalloid based on its properties?
Why is silicon used extensively in electronics?
What are borosilicates used for?
Why is the use of arsenic as an insecticide decreasing?
What is a main application of antimony?
Answers
Answer:
Capable of being hammered out thin
Explanation:
, as certain metals; malleable. capable of being drawn out into wire or threads, as gold. able to undergo change of form without breaking.
Answers
It will take 10 years for the account to double in value.
What is account?
Account is defined as a record in an accounting system that keeps tabs on the financial transactions involving a particular asset, obligation, equity, source of income, or expense. It is used to document financial transactions, totals, or balances related to assets, liabilities, income, outlays, and owner equity.
Given future value = 2 x 5,000 = $10,000
Present value = $5,000
Interest rate = 7%
n = number of periods to double in value
The value of n can be calculated as
FV = PV x ( 1 + r ) ⁿ
10,000 = 5,000 x ( 1 + 0.07 ) ⁿ
2 = 1.07 ⁿ
n = ln ( 2 ) / ln ( 1.07 )
n = 10.24
Thus, it will take 10 years for the account to double in value.
To learn more about account, refer to the link below:
#SPJ2
Explain, in terms of collision theory, why increasing the pressure of the gases in the cylinder increases the rate of the forward reaction.
Determine the amount of heat released by the production of 1.0 mole of SO3(g).
State, in terms of the concentration of SO3(g) , what occurs when more O2(g) is added to the reaction at equilibrium.
Answers
Increasing the pressure will mean that these particles will collide more frequently to yield the products hence driving the forward reaction.
What is the collision theory?
According to the collsion theory, reaction occurs as a result of collision between reactants in a system. Now we have the reaction; 2SO2(g) + O2(g) <==> 2SO3(g) + 392 kJ.
We can see that there are more particles on the left hand side than on the right hand side. Increasing the pressure will mean that these particles will collide more frequently to yield the products hence driving the forward reaction.
Now;
2 moles of SO3(g) produces 392 kJ of heat
1 mole of SO3(g) produces 1 mole * 392 kJ /2 moles
= 196 kJ
Learn more about collision theory: brainly.com/question/867804