Answer:
Hydrogen
Explanation:
It is pretty much present everywhere :)
When assessing solutions to problems involving our water systems, what needs to be considered
Answer:
Virtually every industry in the world anticipates sweeping systemic transformation over the next decade in their strategic planning, production practices, and business models, according to the Sustainability Survey Poll on Water. The global opinion poll, which released a survey of more than 1,200 sustainability experts in March, concludes that water shortages will shift public perception of the value of water, prompting governments and companies to view clean water not as a commodity to exploit but as a precious resource.Conducted by GlobeScan, an international public and stakeholder opinion research firm, and SustainAbility, a think tank and business strategy consultancy, the poll asked, “What are the technologies or changes in behavior which show the most promise for addressing water shortages over the next 10 years?” The experts’ responses generated 19 consensus solutions.
Explanation:
In IR spectroscopy, a primary amine will produce two signal(s) above 3300 cm-1, because the amino group ________________________.
A primary amine will produce two signal(s) above 3300 [tex]cm^1[/tex], because the amino group has two possible modes of stretching (symmetric and asymmetric)
What is IR?Infrared radiation (IR), sometimes referred to simply as infrared, is a region of the electromagnetic radiation spectrum where wavelengths range from about 700 nanometers (nm) to 1 millimeter (mm).
The N-H stretches of amines are in the region 3300[tex]cm^1[/tex].
These bands are weaker and sharper than those of the alcohol O-H stretches which appear in the same region.
In primary amines ([tex]RNH_2[/tex]), there two bands in this region, the asymmetrical N-H stretch and the symmetrical N-H stretch.
Hence, In IR spectroscopy a primary amine will produce two signal(s) above 3300 cm-1, because the amino group has two possible modes of stretching (symmetric and asymmetric).
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The concentration of reactants and products and the rate of reaction were measured during a chemical reaction. After the first 3 seconds, the rate of reaction was 1.8x10^-6 M/s. Which of the following would
explain a lower rate after another 3 seconds?
A) The concentration of reactants increased while the concentration of product decreased
B) The concentration of reactants decreased while the concentration of product increased
C) All concentrations of reactants and products decreased
D) All concentrations of reactants and products increased
Answer: B
Explanation:
Name these compounds according to IUPAC.
IUPAC is the nomenclature approach used for naming compounds. The compounds are ethane, butane, and butene.
What is IUPAC?IUPAC is the nomenclature method of the organic compounds that are universal and is recommended by the International union so that the names of the same chemical species are constant and ubiquitous all over.
The first compound has a single bond and two carbons hence ethane, the second compound has a single bond and four carbons and hence butane, and the third compound has one double bond and four carbon atoms and hence butene.
Therefore, the compounds are ethane, butane, and butene.
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Which reactant controls the amount of product formed?.
Answer:
limiting reactant gives ................
Answer:
Limiting Reagent or Limiting Reactant
Explanation:
The limiting reagent of a reaction is the reactant that runs out first. Once it is completely consumed, the reaction stops.The limiting reagent is the only chemical that is used to calculate the theoretical yield. It is used up first. After that, any excess reagent will not be able to produce more products.And to assess which reactant is which, we must usually have quantities of each reagent in a chemical reaction...and of course we should write a stoichiometric equation that is balanced with respect to mass and charge in order to assess the stoichiometric equivalence.
We could examine for instance, the combustion of methane gas, the which MAY have cooked your dinner … its combustion reaction is as shown...
[tex]CH_4(g) + 2O_2(g) rarr CO_2(g) + 2H_2O(g) + Delta[/tex]
And here conditions of COMPLETE combustion pertain; there is DIOXYGEN in excess, AND methane is the limiting reagent. A [tex]10*g[/tex] mass of methane represents a molar quantity of …
[tex](10.0*g)/(16.01*g*mol^-1)=0.623*mol[/tex]
And with respect to dioxygen we thus require...
[tex]0.623*mol*32.00*g*mol^-1=40*g[/tex]
...but this quantity (AND MORE) is available from the atmosphere....and the methane was the limiting reagent....
A fish has armored plates that enable it to handle the extreme pressure in the deepest, darkest aquatic ecosystem. Where is this fish adapted to live? a pond the open ocean the neritic zone an estuary.
If I have 340 mL of a 1.5 M NaBr solution, what will the concentration be if I add 560 mL more water to it?
Answer:
0.5667 M ≅ 0.57 M.
Explanation:
It is known that the no. of millimoles of a solution before dilution is equal to the no. of millimoles of the solution after the dilution.
It can be expressed as:
(MV) before dilution = (MV) after dilution.
M before dilution = 1.5 M, V before dilution = 340 mL.
M after dilution = ??? M, V after dilution = 340 mL + 560 mL = 900 mL.
∴ M after dilution = (MV) before dilution/(V) after dilution = (1.5 M)(340 mL)/(900 mL) = 0.5667 M ≅ 0.57 M.
D. Identify the building blocks of the following types of biological molecules: (4 points)i. Protein (2 points)
i. Protein (2 points)
ii. Lipid (2 points)
Building blocks are the small units that make the larger, more complex molecule. The building block of protein is an amino acid and lipids are fatty acids and glycerols.
What are proteins and lipids?Proteins and lipids are the biomolecules that are involved in major reactions in the living system. They are composed of smaller subunits joined together by bonds.
Proteins are molecules made up of amino acids linked by the peptide bonds to form the chain of proteins that plays a crucial role in cell functioning.
Lipids are composed of fatty acids and glycerol linked by the ester bond, essential for the storage of energy and in the composition of the membranes.
Therefore, proteins are composed of amino acids and lipids of fatty acids and glycerol.
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An HNO3 (ag) solution has a pH of 1.75. What is the molarconcentration of the HNO3(aq) solution?
⇒ 0.018
-use pH=-log[H3O+]
-solve for H3O+
the temperature of gas is raised by 100 deggres to 200 deggres. what happens to the volume of the gas
Answer:
Increases by 100 Pa
Explanation:
According to The Ideal Gas Equation,
the temperature of the gas is directly proportional to the volume of the gas present in itIf the temperature rises from 100 K to 200 K, then the volume will increase by 100 Pa (standard unit of Pressure)A student is making tea on a cold day. When he tries to put honey in his tea, the honey will not flow out of the bottle. Describe how the student could make the honey flow out of the bottle more easily, and explain why your method would work.
Answer:
Warming it would make it come out. On a cold day the honey is frozen and atoms will not move as fast and are close toghether. When you warm it the atoms will move faster and the honey will come out of the bottle
Explanation:
What is the mass of 61.9 L of oxygen gas collected at STP?
a 122 g 02
b 2.76 g 02
C 88.4 g 02
d 44.2 g 02
Answer:
D. 44.2 g O₂
General Formulas and Concepts:
Gas Laws
Stoichiometry
Dimensional AnalysisMole RatioExplanation:
Step 1: Define
Identify given.
61.9 L O₂ at STP
Step 2: Convert
We know that the oxygen gas is at STP. Therefore, we can set up and solve for how many moles of O₂ is present:
[tex]\displaystyle 61.9 \ \text{L} \ \text{O}_2 \bigg( \frac{1 \ \text{mol} \ \text{O}_2}{22.4 \ \text{L} \ \text{O}_2} \bigg) = 2.76339 \ \text{mol} \ \text{O}_2[/tex]
Recall the Periodic Table (Refer to attachments). Oxygen's atomic mass is roughly 16.00 grams per mole (g/mol). We can use a mole ratio to convert from moles to grams:
[tex]\displaystyle 2.76339 \ \text{mol} \ \text{O}_2 \bigg( \frac{16.00 \ \text{g} \ \text{O}_2}{1 \ \text{mol} \ \text{O}_2} \bigg) = 44.2143 \ \text{g} \ \text{O}_2[/tex]
Now we deal with sig figs. From the original problem, we are given 3 significant figures. Round your answer to the exact same number of sig figs:
[tex]\displaystyle 44.2143 \ \text{g} \ \text{O} \approx \boxed{ 44.2 \ \text{g} \ \text{O}_2 }[/tex]
∴ our answer is letter choice D.
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Topic: AP Chemistry
Unit: Stoichiometry
2.0 mL of a 0.75 M solution of potassium permanganate , KMnO4 solution is used to make a 500 mL solution . What is the concentration of the new solution ?
The concentration of the new solution is 0.003 M.
How do we calculate the required concentration?Required concentration of the final solution will be calculated by using the below equation as:
M₁V₁ = M₂V₂, where
M₁ & V₁ are the molarity and volume of initial solution.
M₂ & V₂ are the molarity and volume of final solution.
On putting values from the question, we get
M₂ = (0.75)(2) / (500) = 0.003 M
Hence required concentration is 0.003M.
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Which of these metals must release the most heat to expenence a given decrease in temperature per gram of metal? Aluminum, Lead, and Iron.
Aluminium is the metal which must release the most heat to experience a given decrease in temperature per gram of metal.
What is Thermal conductivity?This is as a result of free electrons and is the ability of a substance to conduct heat.
Aluminium has the highest thermal conductivity in this case which is why it will release the most heat to experience a given decrease in temperature per gram of it.
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look at the screenshot ;)
This is not the best way to organize a periodic table because two elements might have similar atomic mass.
What is periodic table?Periodic table is a chart in which arrangement of chemical elements are done.
In the early periodic table elements are arranged on the basis of their atomic masses, while after sometime Moseley arranged the periodic table on the basis of atomic number as he proposed that properties of an element is justified on the basis of number if electrons.
And mass of two substances may be same so it is difficult to differentiate between them.
Hence, two elements might have similar atomic mass.
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An atom was observed with +3 charge, n = 38, and e = 28, What is the element name of the atom?
A. Gallium - 69
B. Nickel - 66
C. Manganese - 63
D. Selenium - 72
Which is a non renewable resource A.oil b.sunlight c. Water d.wood
Answer:
(a) Oil
Explanation:
Oil is a renewable source, along with natural gas, coal, and nuclear energy.
lmk is this helped you
~rere
Answer:
A. Oil
Explanation:
Oil, along with natural gas, and coal are called fossil fuels and fossil fuels were formed within the Earth from dead plants and animals millions of years ago.
Define pressure and temperature.
Answer:
The pressure of a given amount of gas is directly proportional to the temperature at a given volume. When the temperature of a system goes up, the pressure also goes up, and vice versa. The relationship between pressure and temperature of a gas is stated by the Gay-Lussac's law.
Which equation represents a combustion reaction?
1) 4fe + 3o2 = 2fe2o3
2) 2h2o = 2h2+o2
3) 2agno3 + h2s = ag2s + 2nho3
4) 2al + n2= 2aln
Answer:
2
Explanation:
do take note that combustion reactions releases oxygen.
What is effect of temperature on solubility?
detail please.
In general, solids become more soluble as the temperature increases. This is why sugar dissolves better in hot water than in cold water. The table shows three examples of the solubility (g of solute per 100 g water) of substances at different temperatures.
that's my answerwhich of the following is a compound .a)oxygen b) Magnesium c) Carbon dioxide d) Argon
A given substance has a melting point of -7 oC and a boiling point of 59 oC. This substance exists as a ____________ at room temperature conditions. Note: room temperature is 25 oC.
A given substance that has a melting point of -7C and a boiling point of 59C exists as a liquid at room temperature conditions.
What are the states of matter?The states of matter refer to the separation of the molecules of a given material in certain temperature conditions.
The states of the matter are three and include the gaseous state, liquid state and solid-state.
In conclusion, a given substance that has a melting point of -7C and a boiling point of 59C exists as a liquid at room temperature conditions.
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When a chemical cold pack is activated, it becomes cool to the touch. What is happening in terms of energy?.
Answer:
An exothermic reaction is happening, it is absorbing the cold.
Why does the hemisphere that is titled away from the sun experience winter?
(science)
Calculate the pressure (in kpa) of 1.5 mole of helium gas at 354 k when it occupies a volume of 16.5l.
Answer:
267.57 kPa
Explanation:
Ideal gas law:
PV = n RT R = 8.314462 L-kPa/K-mol
P (16.5) = 1.5 (8.314462)(354) P = 267.57 kPa
Define density please thanks!!
What is the name of the colony shown?
Answer: New Hampshire
Explanation:
If it is the dark green then its New Hampshire :)
Answer:
New Hampshire ;)
Explanation:
New Hampshire is the dark green state on this map, and it is apart of the first 13 colony I hope that helped.
What is the oxidation number of sulfur in na2s2o3 ?.
Answer:
Therefore, the oxidation state of sulphur atoms in Na2S2O3 is −2 and +6.
Please Hurry And Answer This Question! :)
Which Compound can be used to preserve biological specimens?
1/2/3?
Biological specimens are the preserved remains of the biological materials. Compound A. formaldehyde or formalin is used to preserve the specimens. Thus, option A is correct.
What are fluid-preserved specimens?Fluid preserved specimens are the biological material of the organism that are kept at the store to study and analyze over a long time without getting any damage. Formaldehyde along with alcohol is the most common preservative.
Formaldehyde is an organic compound that is colorless and pungent in the smell that preserves the dead remains of the organisms intact. It is antiseptic and germicide in nature that makes them best for the purpose.
Therefore, option A. formaldehyde is used to preserve the specimens.
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Answer:
so i put a...
Explanation:
Edge doesnt give correct answers on unit tests, but i passed with an 88 :)
Correct me if im wrong!!
David runs a 100-m dash while pushing a stroller with a force of 25N. What amount of work does David do on the stroller?
David runs a 100-m dash while pushing a stroller with a force of 25N. The work done by David is 2500 Nm.
What is force?Force is a power that changes the motion of the object.
The displacement is 100 m
The force is 25 N
Work done = force x displacement
25 x 100 = 2500 Nm
Thus, the work done by David is 2500 Nm.
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