the amount of energy absorbed when 240 dm3 of hydrogen, measured at room temperature and pressure, is formed.
solution:According to Avogadro's law 1 mole of any gas occupies 22.4 L (dm3) at room temperature and pressure.
So the amount of energy absorbed:
(kJ)E=131∗240/22.4
=1403.6(kJ)
1403.6 kJ is absorbed when 240 dm3 of hydrogen, measured at room temperature and pressure is formed.
How many grams are in 5.5 moles of H2O
Answer:
99•g
Explanation:
Well, ONE mole of water has a mass of 18.01⋅g⋅mol−1. and 5.5⋅mol has a mass of approx. 99⋅g.
A solution was made using NaOH, the pH of the solution was found to be 11.452. What is the concentration of the hydroxide ion, OH^- in this solution
Answer:
i think it is 0.002831392
Explanation:
pOH = 14 - 11.452 = 2.548
pOH = -log(OH)
2.548 = -log(OH)
10^(-2548) = 0.002831392
What is the [H+] in a solution with a pH of 9.92
A) 1.2x10^-10 M
B) 9.9x10^-7 M
C) 4.9x10^-5 M
D) 1.1x10^-9 M
Answer:
Total flow: = 1000 cfm = 4.7 x 10 ml/sec. Stack Ht.: 2.7m (9 ft) ... 1.2x10-8. 6.4x10 7. C-14. 4.3x10 7. 1.0x10 5. 2.0x10 8. 1.1x10-8. Na-22. 1.3x1i dont know how to explain it
Which of the following is an oxidation-reduction reaction? so2(g) h2o(l) right arrow. h2so3(aq) caco3(s) right arrow. cao(s) co2(g) ca(oh)2(s) h2co3(l) right arrow. caco3(aq) 2h2o(l) c6h12o6(s) 6o2(g) right arrow. 6co2(g) 6h2o(l)
The reaction which shows oxidation and reduction simultaneously is C₆H₁₂O₆(s) + 6O₂(g) → 6CO₂(g) + 6H₂O(l).
What are redox reactions?Those reaction in which oxidation as well as reduction of substances takes place simultaneously will known as redox reactions.
SO₂(g) + H₂O(l) → H₂SO₃(aq)CaCO₃(aq) → CaO(s) + CO₂(g)Ca(OH)₂(s) + H₂CO₃(l) CaCO₃(aq) + 2H₂O(l)Above reaction are not the redox reactions as in these reaction oxidation and reduction simultaneously not takes place.
C₆H₁₂O₆(s) + 6O₂(g) → 6CO₂(g) + 6H₂O(l)In the above reaction reduction of oxygen takes place as its oxidation state changes from 0 to -2, and at the same time oxidation of carbon takes place as its oxidation state changes from 0 to +4.
Hence correct option is (4).
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Answer:
correct option is (4).
Explanation:
You are a NASA engineer. You are the chief engineer for the Apollo 13 mission to the moon. The astronauts are running out of oxygen and need to get rid of the excess carbon dioxide. You know that sodium hydroxide (NaOH) has been suggested as a means of removing carbon dioxide from the spacecraft cabin. The filter which they had been using is fully saturated and no longer works. You remember that the astronauts have a 5000. g container of sodium hydroxide on the ship. You also know that sodium hydroxide can be used to remove carbon dioxide.
Use the following reaction: NaOH + CO2 → Na2CO3 + H2O
The astronauts have 2 days left before they land on Earth. You know that there are three astronauts, and each astronaut emits roughly 500. g Of carbon dioxide each day. Is there enough sodium hydroxide in the cabin to cleanse the cabin air of the carbon dioxide, or are the astronauts doomed? SHOW ALL YOUR WORK - DON’T FORGET TO BALANCE THE EQUATION
Guiding Questions: How many grams of CO2 are produced in a day? How many grams of CO2 are produced in both days? How many grams of NaOH do you need to get rid of 3000 g of CO2?
Answer:
We know that there are three astronauts and each one of them emits 500 grams of carbon dioxide each day, so the total carbon dioxide emitted each day.
Explanation:
From the mole ratio of the reaction, there is not enough sodium hydroxide in the cabin to cleanse the cabin air of the carbon
What was of Sodium hydroxide is required?The mass of sodium hydroxide required depends on the mass of CO2 produced by the astronauts.
The mass of CO2 produced by the astronauts is calculated as follows;
Mass of CO2 produced = 3 × 2 × 500 g = 3000 g of CO2
The mass of sodium hydroxide required is calculatedfrom the eqaution of the reaction given below:
[tex]2NaOH + CO_2 → Na_2CO_3 + H_2O \\ [/tex]2 moles of sodium hydroxide reacts with 1 mole of CO2
Molar mass of NaOH = 40 g/mol
Molar mass of CO2 = 44 g/mol
Mass of sodium hydroxide required = 3000 g × 2 × 40/44 = 5454.54 g
Therefore, there is not enough sodium hydroxide in the cabin to cleanse the cabin air of the carbon.
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Metallic minerals are consumed in _______ amounts than nonmetallic minerals and materials. group of answer choices
10 points get it right ADVPH
Answer:
Advanced Pharmaceutics Inc
Explanation:
Advanced Pharmaceutics Inc
somehow I know this acroynom
What are the steps of natural selection?
Answer:
The five steps involved in the process of natural selection are
Variation • Inheritance • Selection • Time • Adaptation
☆anvipatel77☆
•Expert•
Brainly Community Contributor
A buffer solution must contain: Select one: a relatively high amount of both an acid and its conjugate base dissolved in water a relatively high amount of the conjugate base dissolved in water a solution that is at pH 7 a relatively high amount of a weak acid dissolved in water a solution that does not contain water
A buffer solution must contain relatively high amount of both an acid and its conjugate base dissolved in water.
What is a Buffer Solution?A buffer solutrion is a soltion that contains appreciable amounts of a
A mixture of a weak acid and its conjugate base A mixture of a weak base and its conjugate acidweak conjugate acid-base pairBuffer solutions resist any small change in pH when small amounts of a strong acid or a strong base are added
Examples of a buffer solution is
The solution of acetic acid and sodium acetate (CH3COOH + CH3COONa),this contains a weak acid and its salt.The solution of ammonia and ammonium chloride (NH3(aq) + NH4Cl(aq), This contains a weak base and its salt.Learn more here on Buffer solution:https://brainly.com/question/10643807
Which of the following formulas should be classified as an acid?
O Na₂SO4
O NaHCO3
O NaOH
O H₂SO4
Answer:
D) H₂SO4 is an acid
Explanation:
Please mark branliest
H[tex]_2[/tex]SO[tex]_4[/tex] is the chemical formula that should be classified as an acid. Therefore, the correct option is option D.
What is an acid?Any substance that tastes acidic when dissolved in water, alters the colour of some indicators, reacts with the some metals to release hydrogen, reacts using bases to produce salts, and stimulates some chemical reactions is considered to be an acid. The inorganic chemicals referred to as being mineral acids sulfuric, nitrous, hydrochloric, or phosphoric acids are examples of acids.
The phenolic, sulfonic, and carboxylic acid groups of organic molecules. These chemicals contain one or maybe more hydrogen atoms, which are discharged into highly charged hydrogen ions when they are in solution. H[tex]_2[/tex]SO[tex]_4[/tex] is the chemical formula that should be classified as an acid.
Therefore, the correct option is option D.
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Write balanced chemical equations for:
a) coke + oxygen --> carbon dioxide
b) carbon dioxide + coke --> carbon monoxide
Answer:
a. C (s)+ 02(g)---->C02(g)
b. CO2(g) +C(s)--->2CO(g)
Explanation:
This reaction is the method of purification of some precious metals such a iron(Fe) in it's ore. a.The carbon(coke) is oxidized to carbon (IV) oxide
b. the carbon dioxide gas is reduced with the same carbon to produce carbon(II) oxide.
Define the main temperature, precipitation, location and soil characterisitcs of the following Biomes.
1. Tundra
2. Temperate Grassland
3. Tropical Rainforest
Answer:
Tundra :a vast, flat, treeless Arctic region of Europe, Asia, and North America in which the subsoil is permanently frozen.
Temperate grasslands are characterized as having grasses as the dominant vegetation.
Tropical rainforests are rainforests that occur in areas of tropical rainforest climate in which there is no dry season – all months have an average precipitation of at least 60 mm – and may also be referred to as lowland equatorial evergreen rainforest.
What is the power output of the stickman that pushes the box 5 meters in 3 seconds with a constant force of
12 N?
Answer:
20W
Explanation:
the power of qn object doing work w in a given time t is given by
p= w/t
50. g of NaNO3 was dissolved in 1250 mL of water.
What is the molality of the solution? (Molar mass of
NaNO3 = 85 g/mol; Density of water = 1.00 g/mol)
m.
Your answer should be rounded to two significant figures. Do not
include units in your answer.
Answer:
.47
Explanation:
I just took a test that asked this exact same question and I got it right.
6. if a cross country runner travels at a speed of 10 mph and he runs for 2 hours, how many miles will he have run at the end of the 2 hours? calculating distance
Explanation:
distance = speed x time
distance = 10 x 2
distance = 20miles
hope that helps :)
If a cross country runner travels at a speed of 10 mph and he runs for 2 hours, 20miles he will have run at the end of the 2 hours.
What is distance?Distance is a description of how far apart two things or points are, either numerically or occasionally qualitatively. Distance can be used to describe a length in physics or to an estimate based on other factors in common usage.
The phrase is widely used metaphorically to refer to a measurement of the degree of distinction between two similar items since spatial intelligence is a rich source of implicatures in human understanding.
distance = speed x time
distance = 10 x 2
distance = 20miles
Therefore, 20miles is the distance.
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What happens to climate and weather over a summer?
Answer:
summers get hotter, and it can get more sticky or humid sometimes.
Explanation:
think of the seasons and the tempatures.
Why do the protons identify the element and not the electrons or the
neutrons?
a sample of helium gas has a volume of 200.0 mL at 730mm Hg pressure. What pressure, in atm is needed to reduce the volume at a constant temperature to 50.0 mL
Explanation:
The question had been explained.
differentiate between condensation polymerization and addition polymerization
Explanation:
The difference between addition polymerization and condensation polymerization is that in addition polymerization the polymers are formed by the addition of monomers without any by-products whereas in condensation polymerization, the polymers are formed due to the condensation of more than one different monomers resulting in the formation of small molecules such as HCl, water, etc., as by-products.
Balancing equations
I'll give brainliest.
Answer:
You should follow these steps:
Count each type of atom in reactants and products.
Place coefficients, as needed, in front of the symbols or formulas to increase the number of atoms or molecules of the substances.
Repeat steps 1 and 2 until the equation is balanced.
Explanation:
A film crew is setting up a scene to show the effects of a blast wave on nearby cars. Why do you think the cars are hanging from cables?
The cars are hanging from cables so that there is presence of more medium of propagation to make it look real.
What is a Blast wave?This is referred to as a violent propagating disturbance, produced by an explosion in air.
Hanging the cars in the air will ensure an accurate description of the effect of the blast wave on them.
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What is the name of this hydrocarbon? a skeletal model has 2 central carbons bonded to c h 3 at each end, and at the left of the 2 central carbons. 3-isopentane 2-methylbutane 3-methylbutane 1,2-methylpropane
The name of the given hydrocarbon in which 2 central carbon atoms with additional 3 methyl groups is 2-methylbutane.
What are hydrocarbons?Hydrocarbons are the organic compounds which are made up of by the combination of hydrogen and carbon atoms.
According to the question desired structure is attached below where:
2 and 3 number shows the central carbon atoms which are present in the hydrocarbon.1 and 4 number shows the methyl groups that are attached at each end.One extra methyl group is attach on the left side of 2nd central carbon atoms.Hence required hydrocarbon is 2-methyl butane.
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Answer:
B. 2-methylbutane
Explanation:
Correct on Edge 2022!!!
Good luck everyone, you got this! Have a great day!
PLS HURRRRRRRRYYYY!!!!
Research a type of plant tropism not presented in the lessons. Create a meme below that name and describes the tropism.
In an ecosystem, plant tropism represented is phototropism which is towards the direction of light.
What is an ecosystem?Ecosystem is defined as a system which consists of all living organisms and the physical components with which the living beings interact. The abiotic and biotic components are linked to each other through nutrient cycles and flow of energy.
Energy enters the system through the process of photosynthesis .Animals play an important role in transfer of energy as they feed on each other.As a result of this transfer of matter and energy takes place through the system .Living organisms also influence the quantity of biomass present.By decomposition of dead plants and animals by microbes nutrients are released back in to the soil.
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The state of matter represented on the right (letter D) has the
highest energy. Of the four choices shown, which is plasma?
B. B.
A. A
D. D
С. С
Answer:
A is the answer.
Explanation:
gorgeousness
Please answer my question I really need it now
Answer:
1 Li , Na, K, Rb, Cs
2 Co, V , Cr, Mn, Fe
3 Po, Te, Se, S, O
The question is given in the image below
A gas has a volume of 22. 6L at 3. 6 atm. What is the pressure of the gas at 44. 3L
Answer:
1.837 atm
Explanation:
According to Boyle's Law:
[tex]V_{1} P_{1} = V_{2}P_{2}[/tex]
(22.6L) (3.6atm) = (44.3L) (x)
x = 81.36 /44.3
x = 1.837 atm
This is because Volume and Pressure are inversely proportional. If one increases the other has to decrease.
Which of the compounds below will dissociate in water? Check all that apply.
Ba(NO3)2
CaSO4
CO2
H2CO3
Mg3(PO4)2
The compounds that can dissociate in water from the options given below are;
Ba(NO3)2
CaSO4
Mg3(PO4)2
What is dissociation of compounds?Dissociation of compound is the process by which compounds degraded into smaller unit which can also recombine to form larger one in another condition.
When ionic compounds dissociate in water, the water molecules separate the ionic crystal. This is because of the attraction between the positive and negative ions in the crystal.
Therefore, The following compounds dissociate in water.
Ba(NO3)2
CaSO4
Mg3(PO4)2
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Given the reaction below, which is the being oxidized? mg cl2 right arrow. mg2 2cl– 2ci– ci2 mg mg2
In the given decomposition reaction of MgCl₂, the oxidized species is magnesium.
What are oxidized species?Those species which goes through the oxidation process by the addition of oxygen or by the removal of hydrogen and electrons are known as oxidized species.
Given chemical reaction is:
MgCl₂ → Mg²⁺ + 2Cl⁻
In the above reaction oxidation of magnesium takes place as they losses electrons and reduction of chlorine takes place as they gain electrons.
Hence magnesium is the oxidized specie.
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Answer: B. Mg
Explanation:
E D G E
ATCG combine different patterns to form different ____
Answer:
Chemicals
Explanation:
Your answer would be chemicals because of you have different inputs you would also have a different output depending.
I hope it helps! Have a great day!
Anygays-
Answer:
Chemicals
Explanation:
Different ATCG makes different chemicals.
I hope it helps! Have a great day!
Muffin °-°
