Answer:
idfk man but someone will HELP
Explanation:
Calculate the amount in grams in 0.52600 moles of vanadium.
Answer:
26.795229
Explanation:
This is how much it is
A walnut stuck to a pin is burned beneath a can containing 100.0 grams of water at 21°C. After the walnut has completely burned, the
water's final temperature is a warmer 28°C. How much heat energy arose from the burning walnut?
2,000 joules
3,000 joules
5,000 joules
O 9,000 joules
Answer:5000 i think
Explanation:
HELPPP PLEASE !/!/!/!/!/!/!/!
Answer:
the second question should be along the staircase
Explain how to use the displacement method to find the volume of an irregularly shaped object.
Answer:
Subtract the volume of the water alone from the volume of the water plus the object. For instance, if "b" was 50 milliliters and "a" was 25 milliliters, the volume of the irregularly shaped object would be 25 milliliters.
Explanation:
Hope it helps
what is the answer pleassssssse helpppp0ppppppppppppppp
Answer:
3
Explanation:
Reduction occurs at the cathode in
1.
electrolytic cells, onlysing
2.
voltaic cells, only
3.
both electrolytic cells and voltaic cells
4.
neither electrolytic cells nor voltaic cells
Answer: 3
Explanation:
3) both electrolytic cells and voltaic cells
The statement, that describes reduction occurs at the cathode is "both electrolytic cells and voltaic cells."
What is a reduction?The gain of electrons is referred to as reduction. The species that is being oxidised is also known as the reducing agent or reductant, whereas the species that is being reduced is known as the oxidising agent or oxidant.
Reduction takes place at the cathode electrode whereas oxidation occurs at the anode in both galvanic and electrolytic cells, and electrons travel from the anode to the cathode.
Electrons must move toward the location of reduction since reduction is the addition of electrons. The negative charge is on the cathode of an electrolytic cell, while the positive charge is on the anode.
Hence, the correct answer is 3.
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How does carbon cycle
Answer:
The carbon cycle describes the process in which carbon atoms continually travel from the atmosphere to the Earth and then back into the atmosphere. ... Carbon is released back into the atmosphere when organisms die, volcanoes erupt, fires blaze, fossil fuels are burned, and through a variety of other mechanisms.
hopefully that answered your question. brainliest would be appreciated. have a awesome day!
Answer:
evaporation or released from natural eruptions by nature
1. A helium-filled balloon had a volume of 8.50 L on the ground at 20.0°C and a
pressure of 750.0 Torr. After the balloon was released, it rose to an altitude where the
temperature was 40.0°C and the pressure was .550 atm. What is the new volume of
the balloon in liters at the high altitude?
Answer:
133.74 L
Explanation:
First we convert the given pressures and temperatures into atm and K, respectively:
750.0 Torr ⇒ 750/760 = 0.9868 atm20°C ⇒ 20+273.16 = 293.16 K40°C ⇒ 40+273.16 = 313.16 KThen we use the PV=nRT formula to calculate the number of moles of helium in the balloon, using the data of when it was on the ground:
0.9868 atm * 8.50 L = n * 0.082 atm·L·mol⁻¹·K⁻¹ * 293.16 Kn = 2.866 molThen, knowing the value of n, we use PV=nRT once again, this time to calculate V using the data of when the balloon was high up:
0.550 atm * V = 2.866 mol * 0.082 atm·L·mol⁻¹·K⁻¹ * 313.16 KV = 133.74 L
31. What are the major groups of microrganisms?
32. Describe the characteristics of coke?
33. Give two example to show that plastics are non – corrosive in nature?
34. Define acid rain.
35. What is metamorphosis?
38. Define cataract.
Answer:
31.Microbial
32.Coke is a grey, hard, and porous fuel with a high carbon content and few impurities, made by heating coal or oil in the absence of air—a destructive distillation process. It is an important industrial product, used mainly in iron ore smelting, but also as a fuel in stoves and forges when air pollution is a concern.
33.examples to show that plastics are non corrosive in nature: Iron nails get rusted when exposed to moisture and air but plastic do not react with water and air. Plastic does not react with strong chemicals. Hence,cleansing chemicals are stored in plastic bottles and not in metal containers.
34.rainfall made sufficiently acidic by atmospheric pollution that it causes environmental harm, typically to forests and lakes. The main cause is the industrial burning of coal and other fossil fuels, the waste gases from which contain sulfur and nitrogen oxides, which combine with atmospheric water to form acids.
35.in an insect or amphibian) the process of transformation from an immature form to an adult form in two or more distinct stages.
38.a medical condition in which the lens of the eye becomes progressively opaque, resulting in blurred vision.
Explanation:
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What new characteristic did John Delton add to the model of the atom BRAINLY WHOEVER GETS IT RIGHT PLEASE IM ON A TIMER
Determine the number of moles of phosphorus contained in 4.41 x 10^24
atoms of phosphorus.
Answer:
7.33 mol P
Explanation:
4.41 × 10²⁴ / 6.02 × 10²³ = 7.33
Answer:
the answer is 7.33 mol P
Explanation:
The rabbit in this food web would be considered a
Answer:primary consumer
Explanation:
i got it right
Many people wear reading glasses, which allow for better near vision.
What type of lenses are on these glasses?
Answer:
Convex
Explanation:
8 guess not sure cause light rays should be converging to meet to their eye
Questions
1. Is the statement true that a gas takes on the shape of the container?
2. What happened to the water when it was poured into the glass? Into the square container?
3. Did the wood have a fixed shape?
4. Of what state of matter is water an example?
5. Of what state of matter is
ice an example?
6. Of what state of matter is steam an example?
This is for a project. Complete in complete sentences. Please. Sorry if this is confusing
Answer:
1. It will take the shape of its container. Particles can move about within a liquid, but they are packed densely enough that volume is maintained. Gaseous matter is composed of particles packed so loosely that it has neither a defined shape nor a defined volume. A gas can be compressed
2. However after pouring the water from one short glass into a tall glass, to be the same amount after being poured into any other container
3. Yes, wood have a fixed shape. Explaination: The reason is that it's solid and solids have a definite volume and shape. ... They have shapes that do not change and volumes that can be measured
4. Water is known to exist in three different states; as a solid, liquid or gas. Clouds, snow, and rain are all made of up of some form of water. A cloud is comprised of tiny water droplets and/or ice crystals, a snowflake is an aggregate of many ice crystals, and rain is just liquid water
5. Solids are sometimes formed when liquids or gases are cooled; ice is an example of a cooled liquid which has become solid. Other examples of solids include wood, metal, and rock at room temperature
6. For example, water commonly exists in three states of matter: solid (ice), liquid (water), and gas (steam)
Explanation:
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1. It will adopt its container's shape. Within a liquid, particles can move around, yet the volume is maintained because of the liquid's dense packing. Particles in gaseous stuff are arranged so haphazardly that neither their shape nor their volume can be determined.
What is liquid ?The term liquid is defined as substance which is not solid but which flows and can be poured and take a shape of container. water is an example of liquid.
2. However, the same amount of water would be poured into any other container after being transferred from one short glass to a tall glass.
3. The shape of wood is fixed. It's solid, and solids have a distinct volume and shape, which explains why. They have measurements-able volumes and unchanging forms.
4. There are three recognized states of water: solid, liquid, and gas. Snow, rain, and clouds are all composed of water in some way. A snowflake is an accumulation of several ice crystals, a cloud is made up of microscopic water droplets and/or ice crystals, and rain is just liquid water.
5. When liquids or gases are chilled, solids can occasionally form; ice is an example of a cooled liquid that has solidified. At room temperature, solids also include wood, metal, and rock.
6. As an illustration, water typically exists in three states: solid (ice), liquid (water), and gas (steam).
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Methane is the major component of natural gas. The standard molar enthalpy of formation of methane CH4 is -74.9 kJ/mol. For the balanced reaction equation of methane use:
CH4 + 2O2 --> CO2 + 2H2O.
All the chemicals in this reaction are gases. What is the enthalpy change of this reaction in kJ/mol?
Answer:
[tex]\Delta _rH=-802.2kJ/mol[/tex]
Explanation:
Hello!
In this case, according to the given chemical reaction, it is possible to calculate the enthalpy change of the reaction via:
[tex]\Delta _rH=\Delta _fH_{CO_2}+2\Delta _fH_{H_2O}-\Delta _fH_{CH_4}[/tex]
Since the enthalpy of formation of oxygen is 0. Thus, given the enthalpies of formation of gaseous carbon dioxide and water, we obtain:
[tex]\Delta _rH=(-393.5kJ/mol)+2(-241.8kJ/mol)-(-74.9kJ/mol)\\\\\Delta _rH=-802.2kJ/mol[/tex]
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A device which make work easy it call
PLZ HELP I NEED THIS RN!
when the balls reach the bottom of the ramp, which statement will describe their energy?
A. they will have no kinetic energy
B. they will have 100% potential energy
C. they will have 100% kinetic energy
C. they will have different amounts of potential energy
Answer:
they will have 100% kinetic energy
Explanation:
all the potential energy has been used when it is at the bottom of the ramp
Cl2 + 2KBr -> Br2 + 2KCI
How many grams of Br2 can be produced from 356 g of KBr?
A. 2.99 g Br2
B. 1.50 g Br2
C. 9.10 g Br2
D. 239 g Br2
Answer: D. 239 g of [tex]Br_2[/tex]
Explanation:
To calculate the moles :
[tex]\text{Moles of solute}=\frac{\text{given mass}}{\text{Molar Mass}}[/tex]
[tex]\text{Moles of} KBr=\frac{356g}{119g/mol}=2.99moles[/tex]
The balanced chemical reaction is:
[tex]Cl_2+2KBr\rightarrow Br_2+2KCl[/tex]
According to stoichiometry :
2 moles of [tex]KBr[/tex] produce = 1 mole of [tex]Br_2[/tex]
Thus 2.99 moles of [tex]KBr[/tex] produce =[tex]\frac{1}{2}\times 2.99=1.495moles[/tex] of [tex]Br_2[/tex]
Mass of [tex]Br_2=moles\times {\text {Molar mass}}=1.495moles\times 159.8g/mol=239g[/tex]
Thus 239 g of [tex]Br_2[/tex] will be produced from 356 g of KBr.
Which of these would you expect to have the highest boiling point?
Pertane: HOC-CH2-CH-CH2-CH)
Neopentane:
H.C-C-CH3
CH3
CH,
CHE
Isopentane:
Cyclopropane
НЕС-СН-СН-СН3
Нас
CHz
a) cyclopropane
b) pentane
c) isopentane
d) neopentane
Answer:
pertane the stronger the force the larger amount of energy needed to break of the connection between the molecules
__Na3PO4 + __Sr(NO3)2 --> ___Sr3(PO4)2 + __NaNO3
If .0789 moles of Strontium Nitrate are reacted, how many moles of Sodium Phosphate were reacted?
Answer:
0.0526mol
Explanation:
The chemical equation given in this equation is as follows:
Na3PO4 + Sr(NO3)2 → Sr3(PO4)2 + NaNO3
However, this equation is unbalanced as the number of atoms of each element on each side does not correlate. The balanced equation is as follows:
2Na3PO4 + 3Sr(NO3)2 → Sr3(PO4)2 + 6NaNO3
This balanced equation means that:
2 moles of Sodium Phosphate (Na3PO4) is required to react with 3 moles of Strontium Nitrate (Sr(NO3)2)
Hence, if 0.0789 moles of Strontium Nitrate are reacted, then 0.0789 × 2/3
moles of sodium phosphate will also react.
= 0.0789 × 2/3
= 0.1578/3
= 0.0526mol
Why are many chemical names so complex?
Answer:
cause they like it that way
Explanation:
btw cant tell if this is legit or not
If sodium (Na) is combined with Chlorine (CI), the compound would have which formula? A. Naci 0 O B. CINa C. ClaNa D. Na2C14
Answer: A.Naci
Explanation:
Table salt is made from a combination of atoms of sodium (Na) and chlorine (Cl) in a ratio of 1:1 forming the compound NaCl.
Help me answer this chemistry question. thank you!
Answer:
A. How much decay happens in each flashlight
Explanation:
In an experiment, the DEPENDENT OR RESPONDING VARIABLE is the variable that responds to changes being made to another variable called Independent variable. It is the variable that is measured by an experimenter.
In this question, an experiment was carried out to research the effect of sunlight on plastic decay. Three plastic flashlights were used for this experiment in which one was placed in a dark closet (control), and the others were placed in light at different times or intervals. However, the variable being measured or assessed is the decay of each flashlight. This means that "HOW MUCH DECAY HAPPENS IN EACH FLASHLIGHT" is the dependent variable.
List 5 kinds of animals with backbone (Describe each of them)
List 8 kinds of animals without backbone (Describe each of them)
Vertebrates are animals with a backbone (think vertebrae). These are the creatures we usually think of when we think of animals. Vertebrates have tremendous diversity in shape, size, ability, and characteristics. They are truly wondrous creatures! The 5 classes of vertebrates are:
Fish, Amphibians, Reptiles, Mammals, and Birds.
All invertebrates obtain food differently, some have a mouth, and others have a beak. The eight different phyla are, Porifera, Cnidarians, Platyhelminthes, Nematoda, Annelida, Echinodermata, Mollusca, and Arthropoda.
what is a reservoir?
Answer:
a storage space for fluids
Explanation:
Answer:
an area where large amounts of water are stored
Explanation:
Changes of state is an example of a chemical change.
CHANGES
OF STATE
True
False
If the pOH of a solution is 13, what is the PH of the solution?
Answer: pH= 1
Explanation: pOH + pH =14
Copper has two isotopes,
copper-63 and copper-65. It has an atomic mass of 63.546 amu. Sketch a pie graph that shows the approximate abundance of each
copper isotope based on the atomic mass?
Answer:
69.152 % → 63Cu
30.848 % → 65Cu
Explanation:
As you know, the average atomic mass of an element is determined by taking the weighted average of the atomic masses of its naturally occurring isotopes.
How many liters of carbon dioxide gas is produced from 7.98x10^24 molecules of C4H10 (2C4H10 + 13O2 → 8CO2 + 10H2O)?
Solve this problems using the equation: C = λ x ν........ A microwave oven emits radiation at a wavelength of 5.00 x 10e-5 m. What is the frequency of this radiation?
Answer:
c = λ x ν
v =c/λ=(3*10e8)/(5.00 x 10e-5)=6000000000000
f = v/λ =6000000000000/5.00 x 10e-5=120000000
Explanation: