Answer:
Because warm air is less dense
Explanation:
How much does 3 moles of silica weigh
84.2565
Because
1 silica is equal to 28.0855,
times 3 is 84.2565
Go to the To Scale tab at the bottom of the simulation, and select Path from the central menu on the right. Set up a Planet-Moon simulation. Use the sliders to make both the planet and the moon as massive as possible, and then begin the simulation. What do you notice about the moon’s motion when it is closest to the planet? What about when it is farthest away?
When it could be closest to the Earth and farthest from it, the Moon passes the fastest as well as the slowest.
What is Earth?The only cosmic object known to contain life is Earth, which would be located third from the Sun. Although the Solar System contains enormous amounts of water, only Earth is home to liquid surface water. The oceans cover over 71% of Earth's crust, dwarfing its polar ice, lakes, including rivers.
What is moon?The sole natural satellite of Earth would be the Moon. It makes up the Earth-Moon satellite system with Earth. Its diameter is equivalent to one-fourth of Earth. It should be the biggest satellite of a planet compared to the main, bigger than any existing dwarf planet, as well as the fifth biggest satellite in the Planetary System.
When sliders to make both the planet and the moon as massive as possible, and then begin the simulation. they noticed, it could be closest to the Earth and farthest from it, the Moon passes the fastest as well as the slowest.
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how much heat is required to increase the temperature of 20 grams of water by 26 degrees celsius?
Answer: 2175.68 J heat is required to increase the temperature of 20 grams of water by 26 degrees celsius.
Explanation:
Given: Mass = 20 g
Change in temperature = [tex]26^{o}C[/tex]
The standard value of specific heat of water is [tex]4.184 J/ g^{o}C[/tex]
Formula used to calculate the heat energy is as follows.
[tex]q = m \times C \times \Delta T[/tex]
where,
q = heat energy
m = mass of substance
C = specific heat of substance
[tex]\Delta T[/tex] = change in temperature
Substitute the values into above formula as follows.
[tex]q = m \times C \times \Delta T\\= 20 g \times 4.184 J/g ^{o}C \times 26^{o}C\\= 2175.68 J[/tex]
Thus, we can conclude that 2175.68 J heat is required to increase the temperature of 20 grams of water by 26 degrees celsius.
Question 2
5 pts
The air inside a beach ball is at a temperature of 25°C a pressure of 1.0 atm. The ball
contains 0.85 mol of air, what is its volume?
21 L
27 L
0 171
06.11
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Nest
Answer: The volume of given ball is 21 L.
Explanation:
Given : Pressure = 1.0 atm, no. of moles = 0.85 mol
Temperature = [tex]25^{o}C = (25 + 273) K = 298 K[/tex]
According to the ideal gas equation, formula used is as follows.
PV = nRT
where,
P = pressure
V = volume
n = no. of moles
R = gas constant = 0.0821 L atm/mol K
T = temperature
Substitute the values into above formula as follows.
[tex]PV = nRT\\1.0 atm \times V = 0.85 mol \times 0.0821 Latm/mol K \times 298 K\\V = 21 L[/tex]
Thus, we can conclude that the volume is 21 L.
The atomic model that describes an atom as a spherical object containing a certain number of electrons trapped in a mass of positive charge is often called the ___________ model.
help
What happens when heat is removed from water?
The water particles move farther apart.
The water changes from a liquid to a gas.
The temperature of the water increases.
The kinetic energy of the water particles decreases.
Answer:
D). The kinetic energy of the water particles decreases.
Explanation:
Your welcome!
ANSWER
D
Explanation: Got it correct on edge 2022
An aqueous solution has a hydroxide-ion concentration of 1.0x10^-3M. What is the pH of the solution?
a.11
b.3
c.-3
d.7
The total pressure of all the gases inside a metal container is 9.8 atm. If the partial pressure of the oxygen in the container is 4.2 atm, what is the partial pressure of the rest of the gases in the container other than the oxygen?
5.6 atm is the partial pressure of the rest of the gases in the container other than the oxygen.
What is partial pressure?Each gas in a mixture adds to the overall pressure of a mixture. This portion represents the pressure. The pressure a gas would have if it were in its own volume and at its own temperature is known as the partial pressure. According to Dalton's law, the pressure distribution of an ideal gas mixture is equal to the combined partial pressures of the component gases.
The study of partial pressure is significant in the domains of physics, chemistry, and biology. The partial pressure of oxygen or carbon dioxide in the blood is used to calculate blood levels of each substance. The overall pressure in a container is equal to the sum of the partial pressures. The remaining gases must make up the remaining 5.6 atm if the oxygen partial pressure equals 4.2 atm and the sun reaches 9.8 atm in pressure.
Therefore, 5.6 atm is the partial pressure of the rest of the gases in the container other than the oxygen.
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Please someone help ! I need it ASAP
Answer:
6.B
7.B
Explanation:
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100 pointts pls answer quick and no link :In the reaction, Hydrogen + Iodine --> Hydrogen Iodide at equilibrium, some Iodine is is added. What happens to the equilibrium?
Answer:
the concentration of hydrogen iodide will be higher than it was in the original equilibrium conditions.
you have a coin with a volume of 10cm3 and a mass of 23g. What is the density of the coin
Answer:
2.3 grams per cubic cm
Explanation:
Density is equal to mass over volume, so
23/10=2.3
¿
Que es la materia y qué es el volumen que ocupa la materia?
Todo en un estado sólido de materia tiene una forma y una longitud distintas. El volumen de un objeto es la cantidad de espacio que ocupa. Un sólido es un bloque de madera que conserva su forma y volumen cuando se coloca sobre una mesa.
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Question 25 of 33
Which statement describes a periodie trend of brstionization energy?
A It tends to increase from top to bottom of a group
B. It remains the same within a period
c. It tends to decrease from top to bottom of a group
D. It tends to decrease from left to right across a period
Answer:
A) It tends to increase from top to bottom of a group
Is a hydrogel a smart polymer/stimuli-responsive polmer?
Answer:
Polymer scientists have been trying to mimic this behavior by creating so called smart polymers. ... One of the most important classes of stimuli-responsive polymers used for controlled drug delivery is crosslinked polymer networks, e.g., hydrogels and microgels.
Explanation:
Who are the scientists that contributed in arranging of the periodic table?
What are some facts about Radon something that is unique and relatively unknown by the general population???? Helpppppp helpppppp
Answer: Radon is radioactive
Explanation: thats all i know
What is the wavelength of spectral line resulted from the electron transition from n=3 to n=2 in a hydrogen atom.
Answer:
[tex]\lambda=6.56x10^{-7}m[/tex]
Explanation:
Hello there!
In this case, it possible to use the Rydberg equation in order to calculate the wavelength for this transition from n=3 to n=2 as shown below:
[tex]\frac{1}{\lambda} =R_H(\frac{1}{n_f^2}-\frac{1}{n_i^2} )[/tex]
Thus, we plug in the corresponding energy levels and the Rydberg constant to obtain:
[tex]\frac{1}{\lambda} =10973731.6m^{-1}(\frac{1}{2^2}-\frac{1}{3^2} )\\\\\frac{1}{\lambda} =1524129.4m^{-1}\\\\\lambda=\frac{1}{1524129.4m^{-1}} \\\\\lambda=6.56x10^{-7}m[/tex]
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Select the correct answer.
Which of the following is true for a heating curve?
Ο Α.
It shows how the pressure of a substance changes when heated.
OB.
It shows how the temperature of a substance changes when heated.
OC.
It shows how the volume of a substance changes when heated.
It shows how the mass of a substance changes when heated.
OD
Reset
Next
Answer:
the answer is b: it shows how temperature of a substance changes when heated
in which of these compounds are there twice as many oxygen atoms as hydrogen atoms?
Answer:
G - H2SO4
Explanation:
two hydrogen atoms and 4 oxygen atoms
calculate the mass of 0.5 moles of caco3 in grams with procedure
Answer:
50g
Explanation:
moalr mass of CaCO3= 40g/mol+ 12g/mol+(16g/mol*3)
=52g/mol+48g/mol
=100g/mol
1 mol= 100g
0.5mol=x
by cross multiplication,
0.5*100gmol=x mol
x=50g
Given the following data set, calculate the unknown quantity.
P= 1.23 mmHg atm, V=? kL, n= .773 mol, T= 152 °C
Answer:
V ≈ 16,662.63 L
Explanation:
The data given in the question includes;
The pressure in the medium, P = 1.23 mmHg
The number of moles of the substance present in the medium, n = 0.773 mol
The temperature of the substance in the medium, T = 152 °C = 425.15 K
The unknown quantity, V = The volume filled by the substance
The ideal gas law equation that can be used to find the unknown volume is given here as follows;
P × V = n × R × T
Where;
R = The Universal Gas Constant = 62.363 mmHg·L·mol⁻¹·K⁻¹
From the ideal gas law equation, we get;
V = n × R × T/P
Plugging in the values, gives;
V = 0.773 mol × 62.363 mmHg·L·mol⁻¹·K⁻¹ × 425.15 K/(1.23 mmHg) = 16,662.6305405 L
The volume occupied, which is the unknown quantity, V ≈ 16,662.63 L.
At 35.0°C and 3.00 atm pressure, a gas has a volume of 1.40 L. What pressure does the gas have at 0.00°C and a volume of 0.950 L? Which equation should you use? P subscript 2 equals StartFraction P subscript 1 V subscript 1 T subscript 2 over T subscript 1 V subscript 2 EndFraction. P subscript 2 equals StartFraction T subscript 1 V subscript 2 over P subscript 1 V subscript 1 T subscript 2 EndFraction. P subscript 2 StartFraction equals V subscript 1 V subscript 2 over T subscript 1 T subscript 2 EndFraction P subscript 1.
Answer:
a
3.92
Explanation:
What the common uses for Rutherfordium???
Answer:
welcome
Explanation:
Uses of Rutherfordium
Because rutherfordium is made within the lab, there are not very many uses for this element commercially. On the other hand, rutherfordium has been used within the laboratory setting to conduct research. Most elements that are highly radioactive are used for nuclear power and medicinal purposes.
What is the amount of moles of NaOH, if the solution molarity is .33 M NaOH in 0.75 L solution
Answer:
The amount of moles of NaOH is 0.0495
Explanation:
Molarity is a measure of concentration that is defined as the number of moles of solute that are dissolved in a given volume.
In symbolic form molarity is presented as:
[tex]Molarity=\frac{number of moles of solute}{volume}[/tex]
Molarity is expressed in units [tex]\frac{moles}{liter}[/tex].
In this case:
Molarity= 0.33 MNumber of moles of solute= ?Volume= 0.75 LReplacing in the definition of molarity:
[tex]0.33 M=\frac{number of moles of solute}{0.75 L}[/tex]
number of moles of solute= 0.33 M* 0.75 L
number of moles of solute= 0.0495 moles
The amount of moles of NaOH is 0.0495
Answer:
0.248 moles of NaOH
Explanation:
Concept of Molarity is mol/L
[x] = 1 M
1 mol of x contained in 1 L of solution. We write molar concentrations between []
M = mol/L then M . L = mol
Our solution is NaOH
0.33 M . 0.75L = mol
This solution contains 0.248 moles of NaOH
How many calories of heat were added to 167.9 g of water to raise its temperature from 25oC to 55oC?
Answer:
Q = 5036.9 calories
Explanation:
Given that,
Mass, m = 167.9 g
The temperature raises from 25°C to 55°C.
The specific heat of water,c = 4.184 J/g °C
We need to find the heat added to water. We know that,
[tex]Q=mc\Delta T\\\\=167.9 \times 4.184\times (55-25)\\\\=21074.8\ J[/tex]
or
Q = 5036.9 calories
So, 5036.9 calories of heat is added.
If I plant a green bean seed in the desert, will it grow thick, barrel-shaped stems full of water like a cactus? Why or why not?
Answer:
No, although the bean crop can grow perfectly in full sun or a little shade in very warm places. It does not mean that they will adopt the growth patterns of the cactus, especially because this plant needs constant watering (in small quantities), very constant. Beans require good drainage for their growth.
Each vegetation have its own characteristics and the power of adaptation. A green bean cannot survive in a desert like a cactus in desert without water. It can only grow thick in soil with proper water content and nutrients.
What is cactus?Cactus is a type of plant grow in dry regions such as deserts. It can adapt in deserts without water for long time because, the plant have enough water storage in its stem.
Domestic vegetation such as bean, pea, nuts etc ill not grow in dry regions because they cannot adapt in deserts without water. The soil in deserts is dry and have no nutrients.
These conditions prevent the growth of vegetables in desert areas. Moreover, desert have summer season only. The extreme temperature over there will cause the normal plants to diminish.
Therefore, planting green bean in deserts will not make it grow thick like a cactus plant.
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Which of the following represents an alpha particle?
O A. je
B. He
O C. Y
O D.B
Answer:
Alpha particle- B. He (Helium 4 atom )
He represents an alpha particle and the correct option is option B.
What is an alpha particle?Alpha particles are alternatively known as Alpha radiation or Alpha rays. It is a positively charged particle emitted from the decay of various radioactive materials.
They are emitted from the nucleus of some radionuclides during a form of radioactive decay, called alpha-decay.
Alpha particle mass is due to the two protons and two neutrons bonding.
An alpha-particle is identical to the nucleus of a normal (atomic mass four) helium atom i.e. a doubly ionised helium atom.
Therefore, He represents an alpha particle and the correct option is option B.
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A sample of gas as a volume of 425 mL at 25°C at and 760 tour what volume with this gas sample have at STP
Answer:
[tex]\Rightarrow V_2 = 389mL[/tex]
Explanation:
To solve this question, we could use Charles' law since both the number of mole and pressure are constant
At STP pressure P = 760 tor and Temperature = 273K
V1 =425mL, T1 =298K and T2 =273K
and [tex]\frac{V_1}{T_1} =\frac{V_2}{T_2}[/tex]
[tex]\Rightarrow V_2 =T_2\times\frac{V_1}{T_1}[/tex]
[tex]\Rightarrow V_2 =273\times\frac{425}{298}[/tex]
Therefore, [tex]\Rightarrow V_2 = 389mL[/tex]
which do you think will warm up the plate more quickly?
A. Direct sunlight
B.Indirect sunlight
Answer: B
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