Answer:
A.5
Explanation:
How much does 3 moles of silica weigh
84.2565
Because
1 silica is equal to 28.0855,
times 3 is 84.2565
A sample of gas is inside of a rigid container with fixed volume of 350mL. The initial pressure of the system is 366kPa, and the initial temperature is 88 degrees Celsius. How would the pressure of the system change if the temperature was increased to 110 degrees Celsius?
Answer:
457.5kPa
Explanation:
Given data
V1=V2=350mL (fixed volume )
P1=366kPa
T1= 88 degrees Celsius
P2=??
T2= 110 degrees Celsius
For the general gas equation
P1V1/T1= P2V2/T2
V1=V2
P1/T1= P2/T2
Substitute
366/88= P2/110
Cross multiply we have
P2*88=366*110
P2*88= 40260
P2= 40260/88
P2= 457.5 kPa
Hence the pressure will change to 457.5kPa
Will mark brainliest!!!
Can someone please help me with this???
Forensic biologist Manning is looking at a cell sample under the microscope. The cell she sees is oval, with a long tail or flagellum. Immediately, she knows that this is a ________ cell.
red blood
skin
sperm
plant
Answer:
Sperm Cell
Explanation:
Explain how the iron pipes change into rust?
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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Who are the scientists that contributed in arranging of the periodic table?
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.
To know more about Earth and Moon
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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
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
HELP!!! WILL MARK BRAINLIEST!!!
picture attached below
Answer:
0.2 cm
Explanation:
looking at the ruler, you can see that the diameter is 0.4 cm. to get the radius, just divide by two, which gets 0.2 cm as the radius
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:
Which contains more carbon 4.71 g of C6H12O6 or 5.85 g C2H6O?
Answer:
5.85 g C2H6O has more carbon
Explanation:
Weight of carbon in 4.71 g of C6H12O6
[tex]4.71 * 12.01\\56.5671\\[/tex] grams
Weight of carbon in 5.85 g of C2H6O
[tex]5.85 * 12.01\\70.259\\[/tex] grams
Hence, 5.85 g C2H6O has more carbon
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.
State of matter
A gas made up of homonuclear diatomic molecules escapes through a pinhole 3.98 times as fast as oxygen gas. Write the Chemical formula of the gas.
Answer:
H₂
Explanation:
To solve this question we must find, as first, find the molar mass of the homonuclear diatomic gas using Graham's law. With the molar mass we can identify this gas
Graham's law:
[tex]\frac{V_a}{V_b} =\sqrt{\frac{m_B}{m_A} }[/tex]
Where V is the speed of the gases and m the molar mass of those:
As Va is 3.98 times Vb (And mB is molar mass of oxygen gas = 32g/mol)
[tex]3.98 =\sqrt{\frac{32g/mol}{m_A} }[/tex]
15.84 = 32g/mol / mA
mA = 2.02g/mol
As is a homonuclear diatomic gas, the molar mass of the atom is 1.01g/mol. Thus, the gas is:
H₂What is the purpose of a buffer?
Answer: A buffer solution is a solution made to prevent the pH level of something from changing when you add a base or an acid to it. For example, if you put a buffer solution in a pool, and then you put chlorine in it, the chlorine's effect on the PH level will be suppressed.
answer asap pls i give brainliest
Answer:
B. Revolution is a planet's movement around the sun causing four seasons the occur. Rotation is the spinning of the planet on its axis causing day and night.
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]
When calcium carbonate is heated strongly, carbon dioxide gas is evolved. CaCO3(s) → CaO(s) + CO2 (g) If 4.74 g of calcium carbonate is heated, what volume of CO2 (g) would be produced when collected at STP?
Answer:
1.06 liters of gas are produced
Explanation:
Our reaction is:
CaCO₃(s) → CaO(s) + CO₂ (g)
This is the decomposition of calcium carbonate.
Ratio is 1:1:1
1 mol of carbonate can decompose to 1 mol of oxide and 1 mol of oxygen.
We convert mass to moles:
4.74 g . 1 mol /100.08g = 0.0474 moles
These are the moles of oxygen produced.
We know that 1 mol of any gas at STP is contained in 22.4L
0.0474 mol . 22.4L /mol = 1.06 L
Which statement explains why carbon-14 dating cannot be used to date ancient rocks?
O Carbon-14 decays at a varying rate.
O Carbon-14 decays quickly leaving the amount too small to measure.
O Carbon-14 can be used only to date the remains of organisms.
O Carbon-14 has a half-life that is much longer than potassium.
Answer: Carbon-14 decays quickly leaving the amount too small to measure.
Explanation:
Answer:
b
Explanation:
i did it
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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¿
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.
Hope that helps!!!
¡Espero que ayude!
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.
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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If you put a link, you will be reported.
Answer:
5ppm
Explanation:
there are 1 million (1,000,000) µg (micrograms or mcg) per g (gram) ("micro" means millionth). So, 4. 1 part per million (ppm) for a 1g sample is 1 µg or .
I know you said no links, but this is a converter that explained it much better than I know how to
http://www.endmemo.com/sconvert/ppmug_g.php#:~:text=%C2%BB%20Microgram%2Fgram%20Conversions%3A&text=ug%2Fg%E2%86%94ppm%201%20ug%2Fg%20%3D%201%20ppm
heres a screenshot of the site (since i understand links are awful)
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.
which do you think will warm up the plate more quickly?
A. Direct sunlight
B.Indirect sunlight
Answer: B
your welcome Bsbssnsnsmsllqql
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
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]
Best regards!
which of the following is true about these diagrams
Answer:
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