why. air and gas is different?.20pnts five reason.
Answer:
The air we breathe is primarily made of oxygen, and gases contain primarily nitrogen.
Explanation:
Determine the volume of 4. 69 moles of an ideal gas at STP
Explanation:
[tex]4.69mol \times \frac{22.4lit}{1mol} = 105.056lit[/tex]
Write a few sentences about respiration
Answer:
reluctantly she pulled away, her pulse and respiration in a race.
its function is less that of respiration that of FIG.
the least wind raises clouds of fine dust, which fill the air, render it so opaque as to obscure the noonday sun, and make respiration difficult.
Please help I need to draw and label a atom that has 7 protons and 8 neutrons!!!! I will give a brainly
Answer:
Oxygen
Explanation:
Given the following question:
The following atom has 7 protons (plus charge)
The following atom has 8 neutrons (negative charge)
The following atom has 7 electrons since the number of electrons are equal to the number of protons the atom has.
The following atom is oxygen with a mass number of 16: (see photo below)
Let the red represent protons...
Let the gray represent the neutrons...
Let the blue represent the electrons...
Hope this helps.
The removal of oxygen from a substance is known as what?
Answer:
Reduction
Explanation:
An easy thing to remember is:
Oxidation= adding oxygen
Reduction= taking away oxygen
Reduction (reduce)
Which color will the solution most likely become?
Answer:
colorless
Explanation:
The ferric ion reacts with the thiocyanate, which reduces the concentration of Thiocyanate.
Answer:
I dont remember this answer but I do believe it's colorless
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In fractional distillation, the number of carbons in the various components produced
1. stay the same throughout the distillation tower
2. increase as the vapours move up the distillation tower
3. decrease as the vapours move up the distillation tower
4. increase then decrease as the vapours move up the distillation tower
Answer:
No. Gasoline and diesel fuel is. Steel is an alloy of iron, carbon, and various other metals- but it is not distilled.
Sodium and potassium ions do not diffuse in equal numbers through ligand-gated cation channels. Why?.
Answer:
The inside surface of the sarcolemma is negatively charged compared to the outside surface. Sodium ions diffuse inward along favorable chemical and electrical gradients.
Explanation:
Pls, choose me as brainliest!
When carrying out a liquid-liquid extraction using a separatory funnel, Group of answer choices the bottom layer, which always contains the organic product, is always removed first. the organic layer must always be dried with an anhydrous salt like MgSO4. separation of layers is most efficient when the separatory funnel is drained with the top on. the top layer is always removed first with a disposable pipet.
When carrying out a liquid-liquid extraction using a separatory funnel the organic layer must always be dried with an anhydrous salt like MgSO4.
What is Liquid-liquid extraction?This is defined as a method of separation of compounds based on their relative solubilities in two different immiscible liquids.
The organic layer must always be dried with an anhydrous salt like MgSO4 to remove the water content for a more accurate result.
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How can the ocean floor be created and/or destroyed?
Answer:
The ocean floor can be created by plates shifting on the ocean floor, such as subduction or sea-floor spreading. It can also be destroyed by earthquakes or volcanoes.
Explanation:
who wants to be a doctor
Answer:
maybe, but id rather do automotive stuff, thats my second option.
Explanation:
Write a paragraph (5-7 sentences) describing pH and conductivity.
Answer:
pH is a measure of hydrogen ion concentration, a measure of the acidity or alkalinity of a solution. The pH scale usually ranges from 0 to 14. Aqueous solutions at 25°C with a pH less than 7 are acidic, while those with a pH greater than 7 are basic or alkaline. A pH level of 7.0 at 25°C is defined as "neutral" because the concentration of H3O+ equals the concentration of OH− in pure water. On the other hand, electrical conductivity is a non-specific measurement of the concentration of both positively and negatively charged ions within a sample. So the short answer to the question is as follows, the presence of any hydrogen ions present in a substance will impact the pH level and most probably influence conductivity levels. However, hydrogen ions make up only a small part of the ion concentration measured by a conductivity meter.
Suppose that 20.0 mL of 0.010 M Ca(OH)2 is required to neutralize 12.0 mL of aqueous HCl solution. What is the molarity of the HCl solution
The molarity of the 12 mL HCl solution needed to neutralise 20 mL 0.010 M Ca(OH)₂ solution is 0.033 M
Balanced equation2HCl + Ca(OH)₂ —> CaCl₂ + 2H₂O
From the balanced equation above,
The mole ratio of the acid, HCl (nA) = 2
The mole ratio of the base, Ca(OH)₂ (nB) = 1
How to determine the molarity of HCl Volume of acid, HCl (Va) = 12 mL Volume of base, Ca(OH)₂ (Vb) = 20 mLMolarity of base, Ca(OH)₂ (Mb) = 0.01 MMolarity of acid, HCl (Ma) =?MaVa / MbVb = nA / nB
(Ma × 12) / (0.01 × 20) = 2
(Ma × 12) / 0.2 = 2
Cross multiply
Ma × 12 = 0.2 × 2
Ma × 12 = 0.4
Divide both side by 12
Ma = 0.4 / 12
Ma = 0.033 M
Thus, the molarity of the HCl solution is 0.033 M
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11. How many moles of oxygen are produced when 5 moles of potassium chlorate(V)
decomposes completely?
2KCIO3 → 2KCl + 302
Answer:
The answer would be 4.5 moles of O2
Explain why there is a problem in the disposal of polymers such as poly(chloroethene)
Most polymers, including poly(ethene) and poly(propene) are not biodegradable . This means that microorganisms cannot break them down, so they: cause a litter problem if disposed of carelessly. last for many years in landfill sites.
If the solution containing the metal complex ion is made acidic, why will the silver chloride precipitate
Answer,
For example, silver ion can be precipitated with hydrochloric acid to yield solid silver chloride. Because many cations will not react with hydrochloric acid in this way, this simple reaction can be used to separate ions that form insoluble chlorides from those that do not.
What is Thermal Energy?
What does it mean if you have a metallic taste in your mouth.
How many moles does Phosphoric Acid have?
Answer:
0.010204583427424 per 1 gram.
0.01 moles Phosphoric Acid ⇒ 1.0000000000000153 gram(1 gram of acid)
I hope this answers your question! Have a great day.
A reaction vessel at 1215k contains a mixture of SO2( P = 2. 98 bar) and O2(P = 1. 18 bar). When a catalyst is added, this reaction takes place: 2SO2(g)+O2(g)⇌2SO3(g) At equilibrium the total pressure is 3. 80 bar.
Find the value of k?
This problem is providing the equilibrium reaction whereby SO3 is produced and asks for the value of the equilibrium constant. After the calculations, the answer turns out to be 0.124.
Chemical equilibrium.In chemistry, when a chemical reaction attempts to go to completion, it might experience a limitation known as equilibrium; a condition where it is not able to proceed any further.
In such a way, for the given reaction:
[tex]2SO_2(g)+O_2(g)\rightleftharpoons 2SO_3(g)[/tex]
We can write the equilibrium expression as:
[tex]K=\frac{p_{SO_3}^2}{p_{SO_2}^2p_{O_2}}[/tex]
Hence, given the total pressure at equilibrium, we can add the pressures of all the species at equilibrium including the reaction extent, x:
[tex]P_{eq}=p_{SO_3}+p_{SO_2}+p_{O_2}\\\\3.80=(2x)+(2.98-2x)+(1.18-x)[/tex]
Thus, we solve for x to obtain:
[tex]3.80-2.98-1.18=2x-2x-x\\\\-0.36=-x\\\\x=0.36bar[/tex]
Hence, we plug it in into the equilibrium expression to obtain the equilibrium constant as follows:
[tex]K=\frac{(2x)^2}{(2.98-2x)^2(1.18-x)}\\\\K=\frac{(2*0.36)^2}{(2.98-2*0.36)^2(1.18-0.36)}\\\\K=0.124[/tex]
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List two additional questions to address climate change.
Answer: How is climate change affecting the ocean?
Is it climate change, global warming, or global climate crisis?
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Which of the following metals does not react even with steam.?
A. Silver
B. Iron
C. Calcium
D. Sodium
Explanation:
it's silver
it doesn't react w steam
Can please post the answers for 1-5 of Use the Mole Quick Check
1. The atomic mass unit is equivalent to 1/12 of the mass of a neutral atom of which element? (1 point)
Answer:
carbon-12
Explanation:
One atomic mass unit is defined as a mass exactly equal to one-twelfth the mass of one carbon-12 atom. Carbon-12 is the carbon isotope that has six protons and six neutrons.A single atom's atomic mass is just its total mass, which is usually given in atomic mass units, or amu. An atom of carbon with six neutrons, carbon-12, has an atomic mass of 12 amu by definition.An atomic mass unit (abbreviated as AMU or amu) is defined as 1/12 the mass of a carbon-12 atom. The nucleus of the carbon-12 (C-12) atom contains six protons and six neutrons. One AMU is the average of the proton and neutron rest masses, in approximate words.This equates to about 1.67377 x 10 -27 kilogram (kg) or 1.67377 x 10 -24 gram (g). In AMU, an atom's mass is generally equal to the nucleus' total amount of protons and neutrons.The AMU is used to express and differentiate between various isotopes of elements by expressing their relative masses. Thus, uranium-235 (U-235) has an AMU of roughly 235, but uranium-238 (U-238) has a little higher AMU. The disparity is due to the fact that U-238, the most common naturally occurring uranium isotope, contains three more neutrons than U-235, which has been utilized in nuclear reactors and atomic bombs.How do you make condensation on glass?
Answer:
Condensation forms when water vapor condenses into a liquid. The surface of the glass inside your windows cools below the dew-point of the surrounding air. Buy a dehumidifier. Dehumidifiers remove moisture from the air and keep moisture off of your windows.
Explanation:
If 4.0 mL of a 3.0 M HCl solution is exactly neutralized by a 3.0 mL sample of NaOH, then what is the concentration of the NaOH solution?
Answer:
B. 4.0
Explanation:
Calculate the molarity of 0.5 moles NaHCO3
in 5,314 mL of solution.
How do I solve this?
Answer: 0.094 M
Explanation:
Where do bubbles come from when something is boiling? Why do you think that is ?
Answer:
The molecules of the substance collide more aggressively because of the heat
Answer:
It's because the heat is making the water rise and it makes water vapor. I think it's because when the heats warms up, the water warms up as the heat warms up.
Explanation:
hope this helps : )
How do tallgrass, mixed grass, and short grass prairies differ from savannas?The prairies receive less rainfall than savannas. The prairies are temperate grasslands, and savannas are tropical grasslands. The prairies are tropical grasslands, and savannas are temperate grasslands. The prairies receive more rainfall than savannas
Answer:
The prairies are temperate grasslands, and savannas are tropical grasslands (Option D). It is the most important difference between both biomes.
Explanation: brainiest maybe?
Convert 3.50 mm to m. Report your answer to the appropriate number of significant figures. 1 m= 1000 mm
Answer:
0.0035
Explanation:
3.5 millimetres = 0.0035 meters
Answer:
0.0035 m
Explanation:
since 1000 mm is equal to 1 m
then 3.50 mm will be equal to lets say x
1000 mm = 1 m
3.50 mm = x m
cross multiply
1000 × x = 3.50 × 1
divide both sides by 1000
x = 3.50/1000
x= 0.0035 m
what is endothermic reaction
Answer:
Endothermic reactions are chemical reactions in which the reactants absorb heat energy from the surroundings to form products.
Answer:
Chemical reactions that absorb (or use) energy overall are called endothermic. In endothermic reactions, more energy is absorbed when the bonds in the reactants are broken than is released when new bonds are formed in the products.