How does air flow when a low-pressure center occurs in the
atmosphere?
Answer:
A
Explanation:
It is so because the low air pressure create vacuum and the air from high pressure area move toward the low air pressure.
What volume of concentrated 15M H2SO4 is required to prepare 0.75 liters of a 6.0M solution?
Answer:
30 ml
Explanation:
ionization refers to the process of what
Answer:
Any process that leads to the dissociation of a neutral atom or molecule into charged particles ions; the state of being ionized.
Explanation:
Which property among the following is best suitable for metalloids
1 Brittle and behaves like a non-metal
2 Have the property of metals and non-metals
3 Malleable and ductile
4 Conducts electricity and behaves like a metal
Answer:
2. Have the property of metals and non-metals
Explanation:
A metalloid is a substance that posseses the characteristics of both metals and non-metals. In other words, it can be said to be an intermediary between metals and nonmetals.
According to this question, a metalloid
An arctic weather balloon is filled with 34.1L of helium gas inside a prep shed. The temperature inside the shed is 5.°C. The balloon is then taken outside, where the temperature is â5.°C. Calculate the new volume of the balloon. You may assume the pressure on the balloon stays constant at exactly 1atm. Be sure your answer has the correct number of significant digits.
Answer:
When the balloon is taken outside if the outside temperature is lower than the temperature inside the shed, the volume of the helium gas will decrease according to Charles' law. However, if the temperatureoutside is higher than inside the shed, the volume of the helium gas in the weather balloons will increase.
Note: The question is not complete. Assumptionshas been made about the temperature.
Explanation:
According to Charles' law of gases, the volume of a given mass of gas is directly proportional to its temperature in Kelvin provided its pressure remains constant.
Mathematically, V1T1 = V2T2
Given that the volume of the helium gas inside the weather balloon is 34.1 L at a temperature of 5 °C;
When the balloon is taken outside if the outside temperature is lower than the temperature inside the shed, the volume of the helium gas will decrease according to Charles' law. However, if the temperatureoutside is higher than inside the shed, the volume of the helium gas in the weather balloons will increase.
Assuming, the temperature outside the shed was 6.5 °C:
V1 = 34.1 L, T1 = 5.°C or 5.0 × 10^-10 °C = 273.1500000005
V2 = ?, T2 = 6.5 °C 6.5 × 10^-10 °C = 273.15000000065
V2 = V1T1/T2
V2 = (34.1 × 273.1500000005) / 273.15000000065
V2 = 34.1 L
Due the very small increase in temperature, the volume of the balloon increases only very slightly that is increase that it is negligible.
Balance the 2 chemical equation below: 1) _____H2 + _____02 ---> _____H20 2) _____CH4 + _____Cl2 ---> _____CCl4 + _____HCl Your answer:
Answer:
1.) 2H2 + O2 ---> 2H2O
2.) CH4 + 4Cl2 ---> CCl4 + 4HCl
Explanation:
In order to balance the equation, you have to make sure there are the same amount of each element on both sides.
Ex (#1). By adding the coefficients infront of H2 and H20, You now have 4 hydrogen's and 2 oxygens on the left side as well as 4 hydrogens and 2 oxygens on the right side.
Sorry if that's confusing, but hope this helps! :)
Jenna notices that the speed of the wind has increased throughout the day. What is causing the faster wind?
A. There has been no precipitation.
B. The difference in air pressure has decreased.
C. The difference in air pressure has increased.
D. The direction of the wind has changed to the south.
Answer:
It is either C or D I think
Explanation:
I did the test a week ago but I can not figure out if it was C or D, but it was one of them...Hope it helps!
I think its C I'm not sure though.
perspex and polythene are two examples of what?
21 POINTS TO WHO EVER CAN ANSWER THIS
Explain why water is considered the "universal solvent".
Answer:
Explanation:
Water is capable of dissolving a variety of different substances, which is why it is such a good solvent. And, water is called the "universal solvent" because it dissolves more substances than any other liquid. This allows the water molecule to become attracted to many other different types of molecules.
Hydrogen peroxide with a concentration of 3.0 percent (3.0 g of H2O2 in 100 mL of solution) is sold in drugstores for use as an antiseptic. For a 10.0-mL 3.0 percent H2O2 solution, calculate (a) the oxygen gas produced (in liters) at STP when the compound undergoes complete decomposition and (b) the ratio of the volume of O2 collected to the initial volume of the H2O2 solution.
Answer:
a) 0.099 L
b) 9.9
Explanation:
Now, given the equation for the decomposition of H2O2;
2H2O2(l) ------> 2H2O(l) + O2(g)
Mass of H2O2;
percent w/v concentration = mass/volume * 100
volume = 10.0-mL
percent w/v concentration = 3.0 percent
mass of H2O2 = x
3 = x/ 10 * 100
30 = 100x
x = 30/100
x = 0.3 g of H2O2
Number of moles in 0.3 g of H2O2 = mass/ molar mass
Molar mass of H2O2 = 34.0147 g/mol
Number of moles in 0.3 g of H2O2 = 0.3g/34.0147 g/mol
= 0.0088 moles
From the reaction equation;
2 moles of H2O2 yields 1 mole of oxygen
0.0088 moles of H2O2 = 0.0088 * 1/2 = 0.0044 moles of oxygen
If 1 mole of oxygen occupies 22.4 L
0.0044 moles of oxygen occupies 0.0044 * 22.4/1
= 0.099 L
b) initial volume of the H2O2 solution = 10 * 10-3 L
Hence, ratio of the volume of O2 collected to the initial volume of the H2O2 solution = 0.099 L/10 * 10-3 L = 9.9
2Na + 2H20 – 2NaOH+H2
How many Liters of water are needed if 3.7 moles of Hydrogen are available?
Answer:
0.1332 L
Explanation:
The balanced chemical equation is the following:
2 Na(s) + 2 H₂O(l) → 2 NaOH(aq) + H₂(g)
According to the equation, 2 moles of water (H₂O) produce 1 mol of hydrogen (H₂). So, the stoichiometric ratio is 1 mol H₂/2 mol H₂O. To calculate how many moles of H₂O we need to produce 3.7 moles of H₂, we multiply the moles by the stoichiometric ratio:
3.7 moles H₂ x 2 mol H₂O/1 mol H₂ = 7.4 moles H₂O
Now, we have to convert the moles of water to liters. For this, we have to consider the molecular weight (MW) of water and its density (let's consider 1.0 g/mL).
MW(H₂O) = (2 x 1 g/mol H) + 16 g/mol = 18 g/mol
7.4 moles H₂O x 18 g/mol = 133.2 g
133.2 g/(1.0 g/ml) = 133.2 mL
133.2 ml x 1 L/1000 ml = 0.1332 L
Therefore, approximately 0.13 liters of water are needed.
Ionization refers to the process of
A. changing from one period to another.
B. losing or gaining protons
C. turning lithium into fluorine.
D. losing or gaining electrons.
Answer:
B
Explanation:
PLS HELP, NEED HELLLLLPPPPP!!
How are air temperature and humidity related?
Colder air can hold more water vapor than warmer air.
Warmer air and colder air can hold the same amount of water vapor.
Warmer air can move faster than colder air.
Warmer air can hold more water vapor than colder air.
Answer:
I got you! I think the answer is D. Warmer air can hold more water vapor than colder air.
Explanation:
Although this statement is true, I could be incorrect, but it is unlikely. When warm air recieves more water vapor it expands while cold air becomes packed and unstable.
Hope this helps out, good luck! (¤﹏¤)
~ #LearnWithBrainly ~
Answer:
B!Explanation:
= 25 X 5 = (use the correct number of sig figs)
Answer:
1.25 *10^2
Explanation:
25*5 = 125
= 1.25 *10^2
what happens when water changes from a solid to a liquid to a vapor
Answer:
It forms a water cycle!
Hope it helps!!!
What is the molar mass of NH4?
Answer:
96.09 grams per mole
Explanation:
The chemical formula of ammonium carbonate is (NH4)2CO3, a chemical compound with a molar mass of 96.09 grams per mole.
Sorry if its wrong! ~Kira
5.
__________currents can form when liquids and gases are heated. The cold air________and the hot
air
6. Energy can travel through empty space by________Dull black surfaces are_________radiators and_______absorbers. Shiny surface are_________radiators and
absorbers of radiation.
Answer:
Explanation:
Convection
Cold air sinks
Hot air rises
Radiation
faster
better
poor
I think
If a gas is cooled from 222 K to 125 K and the volume is kept constant, what would be the final
pressure if the original pressure was 760 mmHg?
giving 300 pts if u get it correct I will put up a separate link so u can get the
Which gases makes up most of Earth’s atmosphere?
Question 1 options:
argon and water vapor
carbon dioxide and oxygen
nitrogen and oxygen
oxygen and argon
Question 2 (1 point)
What is the correct order of earth's atmospheric layers from bottom to top?
Question 2 options:
Mesosphere, Stratosphere, Troposphere, Thermosphere, Exosphere.
Troposphere, Stratosphere, Mesosphere, Thermosphere, Exosphere
Stratosphere, Troposphere, Mesosphere, Thermosphere, Exosphere.
Thermosphere, Mesosphere, Stratosphere, Troposphere Exosphere.
Question 3 (1 point)
Which characteristics makes the mesosphere different from the other layers of the atmosphere?
Question 3 options:
It is the lowest layer
It is the largest layer
It is the coldest layer
It is the thinnest layer.
Question 4 (1 point)
Based on the diagram above which change can be observed when moving from the troposphere into the stratosphere?
Question 4 options:
Air pressure decreases
Air particles increase
Temperature increases
Question 5 (1 point)
Certain gases in Earth’s atmosphere slow down the movement of energy away from Earth’s surface by absorbing and re-emitting infrared radiation. This helps to keep the surface of Earth at an average temperature of 15°C (59°F). What is this process called?
Question 5 options:
The Coriolis Effect
The Solar Effect
The Greenhouse Effect
The Global Warming Effect
Question 6 (1 point)
How might the increase of volcanic eruptions affect Earth?
Question 6 options:
It might produce more ozone in the atmosphere
It might decrease temperature across Earth
It might increase the carbon dioxide in the atmosphere
It might cause the Earth’s surface to absorb more oxygen.
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Determine which heat transfers below are due to the process of conduction.
I) You walk barefoot on the hot street and it burns your toes.
II) When you get into a car with hot black leather seats in the middle of the summer and your skin starts to get burned when you touch the seats.
III) A flame heats the air inside a hot air balloon and the balloon rises.
IV) A boy sits to the side of a campfire. He is 10 feet away, but still feels warm.
Question 1 options:
I & II
III & IV
I, II, & IV
II, III, IV
Question 2 (1 point)
Saved
The heat transfer depicted in the image is MOST likely
Question 2 options:
circulation
conduction
convection
radiation
he method of heat transfer by which the sun energy reaches the earth is
Question 3 options:
conduction
convection
radiation
solaration
Question 4 (1 point)
Carol owns a two story house with a heating and cooling unit on each floor. In the winter she mostly uses the downstairs unit because the volume of warm air __________ warming the whole house through __________.
Question 4 options:
rises, convection
sinks, conduction
rises, conversion
sinks, radiation
Question 5 (1 point)
The prevailing westerlies are global winds that move from west to east and push most weather in this direction in the United States.
Question 5 options:
True
False
Question 6 (1 point)
Due to the Earth's rotation, global winds follow a curved path known as___.
Question 6 options:
Sea breezes
Wind Direction
Coriolis effect
Wind Chill effect
will mark brainlist need help
Hydrochloric acid (HCl) and sodium sulfide react by forming the gas Hydrogen sulfide and aqueous sodium chloride. Write the complete and net ionic equation for the reaction
Answer:
0.219 mol HCI
Explanation:
Iron(II) sulfide reacts with hydrochloric acid according to the reaction:
FeS (s) + 2HCl (aq) → FeCl2 (s) + H2S (g)
A reaction mixture initially contains 0.223 mol FeS and 0.665 mol HCl.
Once the reaction has occurred as completely as possible, what amount (in moles) of the excess reactant remains?
A strong beam of light is directed toward a tank filled with water. What caused the beam of light to change direction?
When light travels from less dense air to denser glass or water, it slows down. Slowing down of a ray of light changes the direction of the ray of light.
What is Ray of light?Light that travels in a straight line in one direction is called a ray of light. When a group of light emanates from a source, it is called a beam of light. A beam of light is defined as the path of a photon or a group of photons traveling through a space appearing as a column of light.
There are three types of light rays. They are
Incident raysReflected raysRefracted raysExample of a beam is a beam of light with a pass from a laser or laser pointer. A beam of light is made up of particles called photons that carry specific amounts of energy. We cannot measure the length of a beam.
Thus, when light travels from less dense air to denser glass or water, it slows down. Slowing down of a ray of light changes the direction of the ray of light.
Learn more about Ray of light, here:
https://brainly.com/question/13851007
#SPJ2
Is it possible for a reaction with + ΔG° to still be spontaneous in the forward direction? Explain.
Answer:
See explanation.
Explanation:
Hello!
In this case, according to the thermodynamic definition of the Gibbs free energy:
[tex]\Delta G=\Delta H-T\Delta S[/tex]
In the scenario by which G>0 (nonspontaneous) it would be possible for reaction to have a G<0 (spontaneous) if:
- If H>0 and S>0, then the temperature should be increased until the process was entropy-driven for it to be possible.
- If H> and S<0, then it'd be impossible to have an spontaneous process.
- If H<0 and S>0 then the process was not spontaneous.
- If H<0 and S<0 it is possible if the temperature is not high enough to ensure the process is enthalpy-driven.
Best regards!
QUESTIONS
1. Vinegar contains acetic Acid, CH3COOH. Titration of 5.00g of vinegar with 0.100 M
NaOH requires 33.0cmº to reach the equivalence point.
(a) What is the weight percentage of CH3COOH in vinegar?
(b) If the vinegar has a density of 1.005gcm", what is the molarity of CH3COOH in
vinegar?
Answer:
389929.827
Explanation:
33806.78° C
Answer:
(a) 3.96 (w/w) %
(b) 0.663M
Explanation:
The acetic acid, CH₃COOH, reacts with NaOH as follows:
CH₃COOH + NaOH → CH₃COONa + H₂O
Where 1 mole of acetic acid reacts with 1 mole of NaOH
In the equivalence point of the titration, the moles of acetic acid are equal to moles of NaOH added. To solve this question we need to find the moles of NaOH and thus, the mass of acetic acid
Moles NaOH = Moles acetic acid:
33.0cm³ = 0.033L * (0.100moles / L) = 0.0033 moles
Mass acetic acid -Molar mass: 60g/mol-:
0.0033 moles * (60g / mol) = 0.198g
a) Weight percent is 100 times the ratio of the mass of acetic acid (0.198g) in the mass of vinegar (5.00g):
0.198g / 5.00g * 100 = 3.96 (w/w) %
(b) The volume of the vinegar in the 5.00g is:
5.00g * (1mL / 1.005g) * (1L / 1000mL) = 0.00498L
And the molarity is:
0.0033moles / 0.00498L = 0.663M
How many grams are needed to make 2 L of solution of 4 M LiNO3?
Answer:
552 g of LiNO₃
Explanation:
From the question given above, the following data were obtained:
Volume of solution = 2 L
Molarity of LiNO₃ = 4 M
Mass of LiNO₃ =?
Next, we shall determine the number of mole of LiNO₃ in the solution. This can be obtained as follow:
Volume of solution = 2 L
Molarity of LiNO₃ = 4 M
Mole of LiNO₃ =?
Molarity = mole /Volume
4 = mole of LiNO₃ / 2
Cross multiply
Mole of LiNO₃ = 4 × 2
Mole of LiNO₃ = 8 moles
Finally, we shall determine the mass of of LiNO₃ needed to prepare the solution. This is can be obtained as follow:
Mole of LiNO₃ = 8 moles
Molar mass of LiNO₃ = 7 + 14 + (16×3)
= 7 + 14 + 48
= 69 g/mol
Mass of LiNO₃ =?
Mole = mass /Molar mass
8 = Molar mass of LiNO₃ /69
Cross multiply
Molar mass of LiNO₃ = 8 × 69
Molar mass of LiNO₃ = 552 g
Thus, 552 g of LiNO₃ is needed to prepare the solution.
What is the final chemical equation from the following intermediate chemical equations?
2 equations. First: upper P subscript 4 upper O subscript 6 (s) right arrow upper P subscript 4 (s) plus 3 upper O subscript 2 (g). Second: upper P subscript 4 (s) plus 5 upper O subscript 2 (g) right arrow upper P subscript 4 upper O subscript 10 (s).
Upper P subscript 4 upper O subscript 6 (s) plus 2 upper O subscript 2 (g) right arrow upper P subscript 4 upper O subscript 10 (s).
Upper P subscript 4 upper O subscript 6 (s) plus 8 upper O subscript 2 (g) right arrow 2 upper P subscript 4 (s) plus upper P subscript 4 upper O subscript 10 (s).
Upper P subscript 4 upper O subscript 6 (s) plus 15 upper O subscript 2 (g) right arrow upper P subscript 4 (s) plus upper P subscript 4 upper O subscript 10 (s).
Upper P subscript 4 upper O subscript 6 (s) StartFraction 5 over 3 EndFraction upper O subscript 2 (g) right arrow upper P subscript 4 upper O subscript 10 (s).
pls hurry
Answer:
A
Explanation:
edge2021
Answer:
A.
Explanation:
Edge
Among the theories of man's state of nature,which is/are the most credible/Reasonable?,
trees... they bring life nd without trees, there wouldnt be life
Help me anyone? Thanks!!!!
Most objects are not able to float in midair. What must be occurring for these rings to float instead of fall
Answer:
magnetic force
Explanation:
A magnet is defined as an object that can attract other objects that are made of iron. Magnets also repels or push away other magnets. Every piece of magnets have two poles namely, a south pole and a north pole. When one magnet comes near another magnet, it exerts a magnetic force on the other magnet. This force can be attractive force or repelling force depending upon the poles surface of the magnet that are close to each other.
Like pole repel each other while opposite poles attract each other.
In the context, the rings of magnet are floating in the air because there is a magnetic force that is repelling the like surfaces or the like poles of these magnetic rings.
Polar bears are well adapted to the Arctic environment due to their white
fur coats. Which statement BEST explains why white coat color was
possibly favored by natural selection over other coat colors?
answer: white fur works as a camouflage against the white snow, allowing polar bears an advantage when hunting for food and hiding from predators
One of the possible reactions for nuclear fusion involves the collision of 2 deuterium
nuclei. Complete the reaction by identifying the missing particle: 2/1H + 2/1H ——> 1/0n +?
Answer:
³₂He
Explanation:
From the question given above, the following equation was obtained
²₁H + ²₁H —> ¹₀n + __
Let ᵇₐX be the missing part of the equation. Thus, the equation becomes:
²₁H + ²₁H —> ¹₀n + ᵇₐX
Next, we shall determine b, a, and X. This can be obtained as follow:
2 + 2 = 1 + b
4 = 1 + b
Collect like terms
b = 4 – 1
b = 3
1 + 1 = 0 + a
2 = 0 + a
a = 2
ᵇₐX => ³₂X => ³₂He
Thus the equation is:
²₁H + ²₁H —> ¹₀n + ᵇₐX
²₁H + ²₁H —> ¹₀n + ³₂He
The missing part is ³₂He