Answer:
a. 5.77L
b. 700mmHg
c. 395K
Explanation:
Using PV = nRT we can solve these problems where:
P is pressure of the gas in atm (1atm = 760mmHg)
V is volume in liters
n are moles of the gas
R is gas constant: 0.082atmL/molK
T is asbolute temperature in K
a. PV = nRT
V = nRT/P
P = 773mmHg*(1atm/760mmHg) = 1.017atm
T = 25°C+273 = 298K
V = 0.240mol*0.082atmL/molK*298K / 1.017atm
V = 5.77L
b. PV = nRT
P = nRT/V
P = 0.0947mol*0.082atmL/molK*309K/0.635L
P = 0.9216atm * (760mmHg/1atm) = 700mmHg
c. PV = nRT
PV/nR = T
P = 727mmHg * (1atm / 760mmHg) = 0.9566atm
0.9566atm*13.3L/0.393mol*0.082atmL/molK = T
T = 395K
7. What are the chemical formulas for water and calcium chloride?
Answer:
water: H2O
Calcium Chloride: CaCl2
water and calcium chloride: Ca(OH)2 + HCl
Explanation:
CaCl2 + H2O = Ca(OH)2 + HCl
Answer:
Water is H20
Calcium Chloride is CaCI2
What do faults mean? I can see if people write it on goo gle btw.anddddddf short answers only please
Answer:
faults are wrong or disallowed options or suggestions.
Because fresh water is constantly be evaporated from the ocean and then replaced by rivers, the salinity of the oceans ____.
A.increases
B.doubles
C.remains balanced
D. decreases
Answer: Because fresh water is constantly be evaporated from the ocean and then replaced by rivers, the salinity of the oceans remains balanced.
Explanation:
When evaporation takes place in sea water then of course there will occur an increase in salinity.
But as this evaporated water is replaced by water coming from rivers. As a result, the raising salinity is counter balanced by the water coming from rivers.
Hence, salinity remains balanced in sea water.
Thus, we can conclude that because fresh water is constantly be evaporated from the ocean and then replaced by rivers, the salinity of the oceans remains balanced.
FIRST GETS BRAINLIEST (THE ONE THAT IS CORRECT)
A generator changes (Mechanical, Electrical, Static) energy into
(Mechanical, Electrical, Magnetic) energy.
Answer:
mechanical energy to electrical energy
Explanation:
The water turns the turbine with produces mechanical energy so the generator converts it to electrical energy
A sample of a compound is added to distilled water in a clean beaker. A reaction occurs
and the water temperature drops rapidly. Which of the following statments best supports this
observation?
A. An endothermic reaction occurred
B. The water was originally warmer than the compound
C. An exothermic reaction occurred
D. The beaker was contaminated by another compound
Answer: An endothermic reaction occurred
Explanation:
A sample of a compound is added to distilled water in a clean beaker. A reaction occurs and the water temperature drops rapidly which indicates that an endothermic reaction occurred. Hence, option A is correct.
What is an endothermic reaction?Endothermic reactions are chemical reactions in which the reactants absorb heat energy from the surroundings to form products.
An endothermic reaction means that heat is absorbed during this reaction (enthalpy change value has a positive sign).
During the endothermic reaction heat is absorbed from the surroundings (here, water) and hence the temperature of the water in which the reaction is taking place decreases.
Hence, option A is correct.
Learn more about endothermic reaction here:
https://brainly.com/question/8430533
#SPJ2
8)
The animals in the food web release
into the environment, which plants then use for
A)
oxygen respiration
B)
carbon dioxide respiration
water vapor photosynthesis
D)
carbon dioxide photosynthesis
Answer:
Carbon dioxide photosynthesis
Explanation:
During photosynthesis, plants take in carbon dioxide (CO2) and water (H2O) from the air and soil.
hope it helps
How does H3PO ionize in water ?
Are these done correctly ?
HNO3 → H + NO3
H2SO4 → H2 + SO4
Answer:
H3PO4 + H2O ↔ [tex]H^{+}[/tex] + [tex]H2PO4^{-}[/tex]
Explanation:
HNO3 → NO2 + H2O + O2
H2SO4 → SO3 + H2O + O2
Se mezclan por error 70 mililitros de solución de HCl 0.5 Normal con 250 mililitros de solución de hidróxido de sodio 0.30 normal. Calcular: El volumen final de la solución resultante El carácter de la solución resultante La concentración final de la solución resultante El pH de la solución resultante El valor del pOH de la solución resultante
Answer:
asxrsse367721479009qqucinübjpnpnfzdh ilo h
Un elemento tiene 3 orbítales desapareados y presenta 3 niveles de
energía. ¿A qué grupo y período peretenece?
a) IIIA, 3 b) IIIB, 3 c) VIA, 3 d) VB, 3 e) VA, 3
balance this equation:
AsCl3(aq) +__H2S (aq)--> __As2S3(s) + ___HCl (aq)
10 points. Any help is appreciated.
Answer:
I dont see the image
Explanation:
pls make it close up
Which of the following statements is true about acids?
A. Acids taste sour.
B. Acids conduct electricity when dissolved in water.
C. Acids turn blue litmus paper red.
D. Acids donate protons or H+ ions.
E. All of the Above
Answer:
It's (D)
Explanation:
Most acids taste sour, conduct electricity when dissolved in water, turn blue litmus
Most acids taste sour, conduct electricity when dissolved in water, turn blue litmuspaper red, but not all of them. Some acids taste bitter, others sweet and some simply delicious.
Most acids taste sour, conduct electricity when dissolved in water, turn blue litmuspaper red, but not all of them. Some acids taste bitter, others sweet and some simply delicious.Silicic acid is tasteless, is not soluble in water, does not conduct electricity, does not turn blue
Most acids taste sour, conduct electricity when dissolved in water, turn blue litmuspaper red, but not all of them. Some acids taste bitter, others sweet and some simply delicious.Silicic acid is tasteless, is not soluble in water, does not conduct electricity, does not turn bluelithmus paper red, since it merely does not dissociate in water. The only correct option is D
PLS help its not that hard but I don't understand it. Its science not chemistry but they don't have science.
In this activity, you will construct two solar ovens and use thermometers to determine which oven gets the hottest. What engineering problem are you trying to solve?
Answer:
Conservation of resources. Saving energy and helping reduce carbon emission.
Explanation:
Which types of wave are used to support the theory that galaxies are expanding
Visible Spectrum
Explanation:
which uses red shift to indicate objects making away while the blue shift indicates objects moving down.
How many moles are in 24.3g of iron (II) oxide?
Mark me Brainliest..... ......
What is the empirical
formula for a compound that is 69.8% Fe
and 30.2% 0?
Answer:
Fe2O3
Explanation:
(1) We are sorry to say that we will not be able to publish your short story "Max versus the Robots in the school literary magazine. (2) Our editorial board enjoyed the story's creative setting and interesting characters. (3) However, the board ultimately decided that the plot was too confusing, and several members found the ending to be implausible. (4) In addition, some readers were concerned that the technical details about robots were totally boring. (5) Although we have to reject this story, we hope to publish your work in the future, so please submit a story to us again. Which option best revises this paragraph to maintain a formal tone throughout? (T) A. Replace sentence 4 with: In addition, some readers were concerned that the technical details about robots would not be of interest to most students. B. Replace sentence 2 with: The creative setting was enjoyed by the board, and the interesting characters were appreciated bynbe board as well! c. Replace sentence 5 with: While it is with great regret that we must rebuff your literary endeavor, we would like to disseminate a future opus penned by you If you would be so kind as to dispatch an additional work to us for our consideration. 0 D. Replace sentence 3 with: But the editorial board ultimately decided that the plot was too confusing, and several members had no clue what the deal was with the ending,
B.
Replace sentence 4 with: In addition, some readers were concerned that the technical details about robots would not be of interest to most students.
Explanation:
i just did the test
Answer:
It's B.
Explanation:
How many different elements are there in 4AgNO3
Answer:
bobo ang brainly
Explanation:
kasi hindi nya binibigay a ng tamang question
Which of the following claims about a binary compound in which the bonding is ionic is most likely to be scientifically valid?
A) Both elements in the compound are metals.
B) The atomic masses of the elements in the compound are relatively small.
C) There is equal sharing of electrons between the atoms of the elements in the compound.
D) The electronegativity difference between the elements in the compound is relatively large.
Answer:
There is ionic bonding between Mg2+ ions and NO3− ions. Which of the following claims about a binary compound in which the bonding is ionic is most likely to be scientifically valid? Both elements in the compound are metals.
Answer:
The answer is D.
Explanation:
A: not correct: one element is a metal and the other is a non-metal.
B: not correct: Fr could be combined with Cl
C: not correct: They are transferred not shared.
D: correct: Non-metals have a higher electronegativity in comparison to the metals with a low electronegativity which results in a great change in electronegativity.
A football is inflated to 12psi at 20°C What is the new pressure in the football
when the temperature is lowered to -5C
Answer: The new pressure is 3 psi.
Explanation:
Given: [tex]P_{1}[/tex] = 12 psi, [tex]T_{1} = 20^{o}C[/tex]
[tex]P_{2}[/tex] = ?, [tex]T_{2} = 5^{o}C[/tex]
Formula used is as follows.
[tex]\frac{P_{1}}{T_{1}} = \frac{P_{2}}{T_{2}}\\\frac{12 psi}{20^{o}C} = \frac{P_{2}}{5^{o}C}\\P_{2} = \frac{12 psi \times 5^{o}C}{20^{o}C}\\= 3 psi[/tex]
Thus, we can conclude that the new pressure is 3 psi.
Submit two compounds that will correspond to the unknown compound in the equation.
11. Write each step of uranium-240 undergoing first an alpha decay then two rounds of beta decay.
Pls HURRY HELPPP MEEEE
lanation:
ExpErnest Rutherford’s experiments involving the interaction of radiation with a magnetic or electric field (Figure 2) helped him determine that one type of radiation consisted of positively charged and relatively massive α particles; a second type was made up of negatively charged and much less massive β particles; and a third was uncharged electromagnetic waves, γ rays. We now know that α particles are high-energy helium nuclei, β particles are high-energy electrons, and γ radiation compose high-energy electromagnetic radiation. We classify different types of radioactive decay by the radiation produced.
Alpha (α) decay is the emission of an α particle from the nucleus. For example, polonium-210 undergoes α decay:
210
84
Po
⟶
4
2
He
+
206
82
Pb
or
210
84
Po
⟶
4
2
α
+
206
82
Pb
Explain why a solid expands when is is heated
Answer:
When a solid object is heated, it expands. This happens because the atoms in the object start vibrating or moving faster.
Explanation:
If you need a longer explanation, let me know! If not, I hope I helped.
How many particles are in 0.55 mil NaCl?
Answer:
2 atoms
Explanation:
What type of reaction occurs without the addition of heat?
Answer:
A
Explanation:
A spontaneous reaction doesn't require any addition of heat.
The rest of the choices require a transfer of heat energy.
why are cells called the smallest functional unit of a living organism?
What TWO things decide the amount of kinetic energy an object can have?
Answer:
Mass SpeedExplanation:
The energy transferred is known as kinetic energy, and it depends on the mass and speed achieved. Kinetic energy can be transferred between objects and transformed into other kinds of energy. Additionally, The faster an object moves, the more kinetic energy it has. The more mass an object has, the more kinetic energy it has.
El metal Mg reacciona con el Hcl para producir gas Hidrógeno Mg +2HCl---MgCl2 + H2. ¿Qué volumen en Litros de H2 en condiciones STP se liberan cuando reaccionan 8.25g de Mg? * 8.60L 6.60L 7.60L 16.60L
Answer: 7.60 L of hydrogen gas will be liberated.
Explanation:
The number of moles is defined as the ratio of the mass of a substance to its molar mass.
The equation used is:
[tex]\text{Number of moles}=\frac{\text{Given mass}}{\text{Molar mass}}[/tex] ......(1)
Given mass of Mg = 8.25 g
Molar mass of Mg = 24.305 g/mol
Plugging values in equation 1:
[tex]\text{Moles of Mg}=\frac{8.25g}{24.305g/mol}=0.340mol[/tex]
The given chemical equation follows:
[tex]Mg+2HCl\rightarrow MgCl_2+H_2[/tex]
By the stoichiometry of reaction:
If 1 mole of magnesium produces 1 mole of hydrogen gas
So, 0.340 moles of magnesium will be produce = [tex]\frac{1}{1}\times 0.340=0.340mol[/tex] of hydrogen gas
At STP conditions:
1 mole of a gas occupies 22.4 L of volume
So, 0.340 moles of hydrogen gas will occupy = [tex]\frac{22.4L}{1mol}\times 0.340mol=7.60L[/tex] of hydrogen gas
Hence, 7.60 L of hydrogen gas will be liberated.
Night visin cameras are sensitive to energies around 2.21 x 10-19 J. What wavelength of electromagnetic radiation do they use?
Answer:
8.99×10^-7m
Explanation:
The wavelength can be calculated using the expression below
E=hcλ
Where E= energy= 2.21 x 10^-19 J.
C= speed of light= 3x10^8 m/s
h= planks constant= 6.626 × 10^-34 m2 kg / s
E=hcλ
λ= E/(hc)
Substitute for the values
λ=( 2.21 x 10^-19 )/(6.626 × 10^-34 × 3x10^8 )
= 8.99×10^-7m
Answer:
Look at the explanation this one is hard
Explanation:
show your work:
E = hc/ λ
E λ = hc
λ = hc/E
λ = 6.626 x 10^-34 x 3 x 10^8 / 2.21 x 10^-19
=
8.994 x 10-7 m or 899.4 nm
800nm – 3mm is the range of wavelengths for infrared waves.
Night vision cameras use infrared waves.
How does the energy in chemical bonds affect the energy in a chemical reaction?
Answer:
Is by comparing the energy absorbed when bonds in the reactants are broken with the energy released when bonds in the products are formed, you can determine whether a chemical reaction releases energy or absorbs energy overall. Chemical reactions that release energy are called exothermic