A 25.00 mL sample of oxalic acid, H₂C2O4, requires 31.44 mL of 0.3164 M NaOH for titration to the
equivalence point. What is the concentration of the oxalic acid?
H₂C₂O4(aq) + 2 NaOH(aq) →→→ Na₂C₂O4(aq) + 2 H₂O(1)
-
4.973 M
0.1989 M
9.946*10^-2 M
0.3978 M
0.7957 M
Answer: 9.946*10^-2 M
Explanation: if u multply
why does the heating curve for ice/water/steam have areas which are flat?
Answer:
the areas which are flat in the heating curve is when matter is condensing
Describe the climate of Lake Tahoe. How does its elevation and closeness to the ocean affect the climate?
The climate of a region is influenced by large bodies of water like oceans, seas, and major lakes. As a result, coastal regions will have different summer and winter temperatures.
What type of climate is there in Lake Tahoe?The weather in Tahoe is dry and moderate. There is relatively little humidity even in the summer, and snowstorms in the winter are when most precipitation occurs. The lake lies 1,890 meters above sea level at an elevation of 6,200 feet, although the nearby mountain peaks are between 9,000 and 10,000 feet higher (2,743 to 3,048 meters.)
What is the purpose of Lake Tahoe?In Nevada, Lake Tahoe is used as a reservoir for municipal and irrigation water storage. About 75% of the water supply for the quickly expanding Reno-Sparks region comes from Lake Tahoe and a few smaller publicly and privately owned reservoirs in the Truckee River system.
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The top chemical reaction shows the reaction between sodium and chlorine to produce table sale (sodium chloride). Select ALL of the reactants shown in the chemical reaction:
The kind of chemical reaction that results in the formation of sodium chloride is a neutralization reaction.
What is a neutralization reaction?
Bases react to produce water and salt, which requires the interaction of H+ and OH- ions. A pH of 7 results from the neutralization of a potent acid and a potent base. A strong base neutralizing a weak acid will provide a pH result that is more than 7, while the neutralization of a strong acid and weak base will produce a pH result that is less than 7.
A solution is neutralized when equal amounts of acid and base combine to create salts. One mole of protons (H+) is equivalent to one mole of the base, and one mole of acid is equivalent to one mole of protons (H+) (OH-). N parts of acid will always neutralize N parts of the base because salts are created by neutralization reactions with comparable weight concentrations of acids and bases.
Therefore, the kind of chemical reaction that results in the formation of sodium chloride is a neutralization reaction.
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Roderick tries to pick
lock by straightening a
paper clip chemical or physical
Answer:
physical
Explanation:
theres nothing really going on w the paper clip ur just bending it
1.00 x10^5 grams of oxygen molecules and 1.00 x10^5 grams of methane molecules are rearranged into model water and carbon dioxide molecules. following CH4 +2O2 -> CO2 + 2H2O, what will the masses of water and carbon dioxide be?
Masses of water and carbon dioxide be 54 g and 66 g respectively.
Mass is a measure of the amount of matter that an object contains
Here given data is 1.00 x10⁵ grams of oxygen and 1.00 x10⁵ grams of methane and the reaction is
CH₄ +2O₂ → CO₂ + 2H₂O
Then (12+4)= CH₄ , 2×(16×2)=2O₂ , 12+(16×2)=CO₂ , 2×(16+2)=2H₂O
CH₄ = 16 g, 2O₂ = 64 g, CO₂ = 44 g, 2H₂O = 36 g
Then, we have to find masses of water and carbon dioxide = ?
24g of CH₄=24/16×44 = 66 g of CO₂
16 g of CH₄ will produce 36 g of water
Then, 24 g of CH₄ = 24/16×36 = 54 g of water
Mass of water is 54 g and mass of carbon dioxide is 66 g
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Which of the following is the
correct way to express the
number below in standard form?
3.7 x 10-4
A. 0.000037
B. 0.00037
C. 37000
D. 370000
[tex]\implies[/tex] The correct answer is (B) 0.00037
Step-by-step explanation:[tex]\bf{ \underline{Step \: 1)} :3.7 × 10^{-4 }we \: can \: write \: as \:37 × 10^{-5}}[/tex]
[tex]\bf{ \underline{Step \: 2)} :37 × 10^{-5 } \: we \: can \: write \: as \: 37 × \frac{1}{10^5}}[/tex]
[tex]\bf{ \underline{Step \: 3)} :37 × \frac{1}{10^5}\: we \: can \: write \: as \: (37 × \frac{1}{(10)(10)(10)(10)(10)}})[/tex]
[tex]\bf{ \underline{Step \: 4)} :37 × \frac{1}{(10)(10)(10)(10)(10)} we \: can \: write \: as \: ( 37 × \frac{1}{100000}})[/tex]
[tex]\bf{ \underline{Step \: 5)} :37 × \frac{1}{100000} \: we \: can \: write \: as \: \frac{37}{100000}}[/tex]
[tex]\bf{ \underline{Step \: 6)} :\frac{37}{100000} \: we \: can \: write \: as \: 0.000037}[/tex]
15 POINTS!!!! NEED ASAP!!!!
There is a lot of confusion in the world over the word "theory" in the world today, and most people assume that when someone says something is a "scientific theory" it is just a guess. However, we know that a scientific theory is a lot more than just a guess. For this discussion, write your opinion of how we could change the misconception that all scientific theories are just guesses, and make sure to use at least 4 sentences.
A scientific theory is backed up by pieces of evidence hence it is not a mere guess.
What is a scientific theory?A scientific theory is a well crafted explanation of an observed phenomenon. A scientific theory is different from a mere guess in the sense that the scientific theory must have some basis that support it.
A mere guess does not have any kind of data that supports it. Let us take the theory of evolution as an example. Countless discoveries of fossil evidences have shed some light on the probability of the theory. In this case, we can not consider it a mere guess since there is some kind of evidence that supports the claims of the theory.
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Help me out
Question 1: Do heavy metals like lead and arsenic cause damage to human DNA?
Question 2: Should industries releasing heavy metals into land and water ecosystems be penalized?
Heavy metals such lead and arsenic does cause damage to human DNA.
Industries which release heavy metals into land and water ecosystems should be penalized.
However, the exposure of these heavy metals damage the body due to the by inhibiting proteins in DNA pathways during repairs.
What are the effects of exposure on heavy metals?The side or adverse effects of exposure of heavy metals have great risk to the well being of humans. Among these effects are as follows:
It causes certain disorders in the nervous system of humansIt affects the respiratory systemIt affects the circulatory systemSo therefore, heavy metals such lead and arsenic does cause damage to human DNA.
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Write the equilibrium constant expression for this reaction:
NH+4(aq) → NH3(aq)+H+(aq)
The equilibrium constant expression for the given reaction is:-
Equilibrium constant = [NH₃] [H⁺] / [NH₄⁺]
An equilibrium constant is the ratio of the concentration of products to the concentration of the reactant raised to the power of its coefficients.
The rate constants are constant at some particular temperature. It is equal to the rate constant for the forward reaction divided by the rate constant for the backward reaction.
aA + bB ⇄ cC + dD
The equilibrium constant for the reaction is given as
NH₄⁺ (aq) → NH₃ (aq) + H⁺ (aq)
The expression is given as
Equilibrium constant = [NH₃] [H⁺] / [NH₄⁺]
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Lab: Plate Boundaries and Movement lab report
Answer:
facts yo
Explanation
A water sample of unknown phosphate concentration is found to have an absorbance of 0.460 after treatment with tin(II) chloride and ammonium molybdate. What is the concentration of phosphate ion in the sample?
Answer:
07 Question (2 points) See page 160 The concentration of phosphate ions in water samples can be determined by spectrophotometry. Samples are treated with tin(II) chloride and ammonium molybdate to react with the phosphate to make a blue complex. Before testing an unknown sample, a series of solutions with known concentrations is tested to create a calibration plot. Calibration data with concentration units of part per million (ppm) are shown in the graph below. Calibration Data for Phosphate Analysis D Absorbance 0.8 0.7 0.6 0.5 0.4 0.3 0.2 0.1 04 Rat B 0.0434 -0.0264 R = 0.9945 A A water sample of unknown phosphate concentration is found to have an absorbance of 0.460 after treatment with tin(II) chloride and ammonium molybdate. What is the concentration of phosphate ion in the sample? ppm
A solid block of substance is 78.0 cm by 55.0 cm by 35.0 cm and it weighs 569 g. What is its density in g/cm3?
The density of the solid block is 3.79 * 10⁻³ g/cm³.
What is the density of substance?The density of a substance is defined as the ratio of mass and volume of a substance.
Density = mass/volumeDensity measure how close together the particles of a given mass of a substance is. Substances with high density have greater masses compared to the volume of those substances whereas substances with low densities have greater volume compared to their masses.
The volume of the solid block = 78 * 55 * 35 = 150150 cm³
mass of solid block = 569 g
Density of the solid block = 569 g/150150 cm³
Density of the solid block = 3.79 * 10⁻³ g/cm³
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7. matter of only one type of atom. what's the answer for this crossword puzzle I really need help I've been stuck on this question for 32 minutes !! :(
A substance containing only one type of atom is called a chemical element. This differs slightly from an element, which is a category of atoms based on their number of protons. A chemical element is a substance that exists in the real world and is formed from only one type of atom.
This substance can be a set of atoms present on their very own or the atoms can be bonded together to shape molecules of the simplest type of atom, together with oxygen. while a substance incorporates only one form of an atom, it is known as a detail. each detail has a unique name and specific houses which are one of a kind from all of the relaxation of the elements.
An atom is a particle of count that uniquely defines a chemical detail. An atom consists of a principal nucleus which is surrounded by using one or extra negatively charged electrons. The nucleus is definitely charged and consists of one or more fairly heavy particles known as protons and neutrons. isotopes are members of a family of detail that all have the same wide variety of protons but unique numbers of neutrons.
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12. What are two things shown by a chemical formula?
The two things shown by a chemical formula are: it tells the number of atoms of each element in a compound and symbols of the atoms of the elements present in the compound.
What is a chemical formula?A chemical formula is used by scientists to represent the information concerning the elements and the types of elements found in a chemical compound.
A chemical compound is a substance that is made up of two or more elements which are chemically combined together.
There are various type of chemical formula which include the following:
Molecular chemical formula: This type of formula shows the number of atoms for each element in the compound.Empirical chemical formula: This type of formula shows the simplest ratio of atoms of the elements in the compound.Structural chemical formula; This type of formula shows the arrangement and bonds of the atoms of the elements of a chemical compound.Learn more about chemical formula here:
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If the air pressure at sea level is 1,014 mbar, what would you expect would happen to
the air pressure in a hole that is dug 1,000 feet below ground? (Assume the hole is dug
in ground with an altitude of 0 feet.
The pressure within Earth's atmosphere is referred to as atmospheric pressure or barometric pressure. The definition of the standard atmosphere is 101,325 Pa, or the same as 1013.25 millibars, 760 mm Hg, 29.9212 inches Hg, or 14.696 psi.
If the air pressure at sea level is 1,014 mbar, what would you expect would happen to the air pressure in a hole that is dug 1,000 feet below ground?
"451.5415 psi"
14.7 psi + 1000*(0.445 psi) = 451.5415 psi
As we descend in the atmosphere, there is a greater mass of atmosphere above us, hence it is predicted that the pressure will rise.
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A
Which of the following is
the correct way to express
1.37 in scientific notation?
1.37 x 10-1
B
1.37 x 10⁰
1.37 x 101
[tex] \huge \mathbb{\pink{\fbox{\blue{\underline{\green{ANSWER}}}}}} \\ \\ \tt (a) \: 1.37 \times 10 {}^{ 0} [/tex]
Which velocity vs. time graph corresponds to the data represented by the position vs. time graph?
The velocity vs. time graph that corresponds to the info shown by the position vs. time graph is that the graph that has continuous acceleration (straight line).
The above statement of continuous acceleration means a relentless acceleration. A straight lines is just known to be a continuing acceleration that's said to be unchanging. Note that when there's a curved lines in a very graph, it implies that there's a non-constant acceleration. Therefore an object that's undergoing constant acceleration is one that may be seen in an exceedingly line. So therefore, the speed vs. time graph is one that matches with the information represented by the continual acceleration (straight line) on the graph.
Constant acceleration means that velocity changes at a constant rate with respect to time. If acceleration is made zero, velocity does not change. If acceleration is positive, the magnitude of velocity increases correspondingly.
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Answer:
your answer is c your welcome
Explanation:
8.00 g of C,H, has how many H atoms?
The correct answer is 3.68 × 10^23 atoms.
The Avogadro's number is the number of constituent particles—typically molecules, atoms, or ions—that make up a mole of a substance. The relationship between the molar mass of a substance and the mass of a sample is determined by its proportionality. In the International System of Units, it has the symbol NA or L and a value of 6.022140857 × 10^23 mol^-1 (SI).
Weight of C6H6 = 8 gram
C6H6 Molar mass is = 78 gram/mole
Mole of C6H6 = 8 / 78 mole
= 0.102 mole C6H6
Mole of C6H6 = No. of C6H6 molecule / Avagadro number
0.102 × 6.03 × 10^23 = No of C6H6 molecule
Here 6 atoms in C6H6 molecule so
No. of H atoms in C6H6 = 0.102 × 6.03 × 10^23
= 3.68 × 10^23 atoms
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You know that silver has a density of 10.5 g/cm3. What mass of silver will raise the level of the
water in the graduated cylinder 1.50 mL?
The mass of the silver that will raise the water by 1.5 mL is 15.75 g
What is density?The density of a substance is simply defined as the mass of the subtance per unit volume of the substance. Mathematically, it can be expressed as
Density = mass / volume
With the above formula, we can obtain the mass of the silver. Details below
How to determine the mass of the silverDensity of silver = 10.5 g/cm³Volume of water raised = 1.5 mLVolume of silver = Volume of water raised = 1.5 mL = 1.5 cm³Mass of silver =?Density = mass / volume
Cross multiply
Mass = Density × Volume
Mass of silver = 10.5 × 1.5
Mass of silver = 15.75 g
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1.5 miles to centimeters
hi
1 mile is 1 609 meters. (rounded).
As there is 100 centimeters in a meter, then
1 mile is 160 900 centimeter.
Then 1.5 miles , is 1 mile + one half so :
160 900 + 160 900 /2 = 160 900 + 80 450
= 241 350
1.5 mile is 241 350 centimeters.
please note that the value of a mile was rounded.
A student carried out the reaction below starting with 1.993 g of unknown (X₂CO3), and
found that the mass loss due to CO₂ was 0.593 g.
X₂CO3(s) + 2 HCl(aq) ® 2 XCl(aq) + H₂O() + CO₂(g)
How many moles of CO₂ were produced?
The reactants are CH4 and O2 and the products are CO2 and H2O. The coefficients for both CH4 and CO2 are 1, meaning that for each mole of CH4 consumed, 1 mole of CO2 is produced.
Solution:
X₂ (03 (s) + 24U (ag) → 2x4(aq) + [tex]H_{2}ol[/tex] + [tex]o_{2}(g)[/tex]
Moles of [tex]o_{2}[/tex] = Mass of CO₂ produced 0.5938/Molar mass of co₂
= 0.593g/44.01gmol·
= [tex]n_{co2}[/tex] = 1.35*[tex]10^{-2} mol[/tex].
You can search for unclaimed property online through the Unclaimed Property Department database. Find out if the property matches your information. Once you've found a property you own, select the listing and click Start Claim. If you have lost a large amount of money, we recommend calling the police.
Do a thorough search first, but if you still can't find the money, call the police. Check your eligibility by visiting the FSCA website, which has a built-in search engine. Visit Liberty's website and add your or your relatives' details for quick and easy verification.
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How many milliliters of 6.1 M HCI solutions are needed to obtain 0.150 mol HCI
The amount of volume in millilitres a 6.1 M HCI solution needed to obtain 0.150 mol HCI is 24.6mL.
How to calculate volume?The volume of a solution can be calculated by dividing the number of moles by the molarity of the solution as follows:
Volume = no of moles ÷ molarity
The molarity of a solution is the concentration of a substance in solution, expressed as the number moles of solute per litre of solution.
According to this question, 6.1 M HCI solutions are needed to obtain 0.150 mol HCI, the volume required can be calculated as follows:
Volume = 0.150moles ÷ 6.1 M
Volume = 0.0246 L
To convert this volume to millilitres, we multiply by 1000 to derive 24.6mL.
Therefore, the amount of volume in millilitres a 6.1 M HCI solution needed to obtain 0.150 mol HCI is 24.6mL.
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What are produced when asteroids, meteoroids, or comets hit the moon's surface?
Craters are produced when asteroids, meteoroids, or comets hit the moon's surface.
What are Craters?This refers to a type of depression which is formed on the surface of the planet, moon etc which are present in the solar system due to hyper velocity impact of a smaller body such as asteroids, meteoroids etc.
Craters can also be formed as a result of the explosion which results from the impact of the smaller bodies mentioned above. The moon has a lot of craters which was formed billions of years ago and is therefore the most appropriate choice in this scenario.
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is the forward reaction in the [CoCl4]2- ion / [Co(H2O)6]2 ion equilibrium exothermic or endothermic? Briefly explain how the student's observation supports your answer.
The forward reaction in the tetra-chloro cobalt(II) ion and hexa-aquo cobalt ion equilibrium is a exothermic process.
How is the given forward reaction inferred exothermic?The reaction is exothermic in the forward reaction because Co(H₂O)₆[tex]^+2[/tex] is more stable than CoCl₄[tex]^2-[/tex] as the bond are stronger in aquo complex of cobalt than in chlorate complex.
It is expected that if temperature is increased, reaction will occur in reverse direction to favoring endothermic reaction ,and if temperature is decreased exothermic reaction is favored.
In exothermic reaction,the color of complex is pink due to an increase in the number of water molecules while in endothermic reaction there is an increase in the concentration of chloride ions which leads to blue color solution.
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what are the two sources of energy for earths geological systems?
Answer:
radioactive decay or solar radiation
Explanation:
According to today's Lesson Module Reading, which of the following are aqueous suspensions? Milk Soil Paint Jelly beans
Answer:
i think paint
Explanation:
Be sure to answer all parts.
Give the name and formula of the compound formed from the elements 38L and 17M.
Answer:
Explanation:
55647 for b
Determine the kinetic energy of 1 mole oxygen at 250k. (R= 8.314 J/Kmol).
Answer:
The kinetic energy is,
Explanation :
The formula for kinetic energy is:
where,
R = gas constant = 8.314 J/mol.K
T = temperature =
Now put all the given values in the above kinetic energy formula, we get:
Therefore, the kinetic energy is,
Explanation:
Does air consists of elements only
Answer:
yes
Explanation:
it is a mixture of gases.
there are some other main gases like,
nitrogen with approximately 78%
and oxygen with 21%
and many other gases.