Answer:
Aluminum
Explanation:
Because aluminum temperature changed less than the copper's did under the same condition. This, the aluminum must require more energy to change its temperature
EFFECTS Of The
HUMAN INTERVATION OF THE
CARBON CYCLE.
Human activities have a tremendous impact on the carbon cycle. Burning fossil fuels, changing land use, and using limestone to make concrete all transfer significant quantities of carbon into the atmosphere. ... This extra carbon dioxide is lowering the ocean's pH, through a process called ocean acidification.
The freezing point of pure water at sea level is 0•c.What is that in kelvins?
Answer:
its b
Explanation:
answer: 273 in kelvin
Solve for the missing values?
Help me plz!
Use the chemical equation to complete the activity.
H2(g) + I2(g) → 2HI(g)
A student makes the following statements:
Hydrogen always has the same oxidation number, so it has an oxidation number of +1 in both the reactant H2 and product HI.
Iodine is in Group VIIA, so it has an oxidation number of –1 in both the reactant I2 and product HI.
Neither hydrogen nor iodine changes oxidation states, so the reaction is not a redox reaction.
In three to five sentences, describe the mistake that the student made, and determine whether or not the reaction is a redox reaction. Explain your answer.
The oxidation number of hydrogen increases to +1 while the oxidation number of iodine decreases to -1.
We must recall that the oxidation number of a particular atom or ion in any chemical specie is decided based on some arbitrary rules. Those rules are used to tell what the correct oxidation number of an atom should be in a compound or ion.
Firstly, the oxidation number of iodine and oxygen in the gas molecules is zero. The oxidation number of substances is not constant. However, on the right hand side, the oxidation number of hydrogen increases to +1 while the oxidation number of iodine decreases to -1.
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Which of the following describes an action-reaction pair?
A. The Sun's gravity pulls on you, and Earth's gravity pulls on you.
B. Your backpack pulls down on your shoulders, and your feet push
on the ground.
C. Your feet push down on the ground, and the ground pushes up on
your feet.
D. You push on a wall, and your feet push on the ground.
Which of the following gases would you expect to deviate most from Kinetic Molecular Theory?
A. Helium
B. Hydrogen
C. Ammonia
D. Nitrogen
Ammonia which is denoted by NH₃ would most deviate from the kinetic
molecular theory.
Kinetic molecular theory of gases indicates that the molecules are in
constant motion thereby exhibiting perfectly elastic collisions. Ammonia
have a high van der waals constant and critical temperature which makes
its state unstable.
The state of matter of Ammonia isn't stable and is regarded as a temporary
gas as a result of it exhibiting more tendencies to liquefy and change to
liquid state.
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Which resources are renewable resources?
Select all correct answers.
A. solar
B. natural gas
C. biomass
D. coal
E. hydroelectric
Answer:
Hey, so the correct answers would be,
Solar, Biomass and hydroelectric, Picture is for proof!
Explanation:
The resources are renewable solar, hydroelectric, and biomass.
What is a renewable resource?
Renewable resources are those which can be produced artificially again and again.
They do not pollute the environment.
These resources are already present in the environment, and we are consuming them.
Thus, the correct options are A. solar, C. biomass, E. hydroelectric.
Learn more about a renewable resource
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0.0624 g of a solid, diprotic acid, H2X, is neutralized with 13.96 mL of 0.1051 M NaOH. What is the molar mass of the diprotic acid, H2X
The molar mass of the diprotic acid, H₂X is 84.9 g/mol
We'll begin by calculating the number of mole in 13.96 mL of 0.1051 M NaOH. This can be obtained as follow:
Volume = 13.96 mL = 13.96 / 1000 = 0.01396 L
Molarity of NaOH = 0.1051 M
Mole of NaOH =?
Mole = Molarity x Volume
Mole of NaOH = 0.1051 × 0.01396
Mole of NaOH = 0.00147 mole Next, we shall determine the number of mole of the diprotic acid, H₂X required to react with 0.00147 mole of NaOH. This can be obtained as follow:H₂X + 2NaOH —> Na₂X + 2H₂O
From the balanced equation above,
2 moles of NaOH reacted with 1 mole of H₂X.
Therefore,
0.00147 mole of NaOH will react with = 0.00147 / 2 = 0.000735 mole of H₂X.
Finally, we shall determine the molar mass of H₂X.Mole of H₂X = 0.000735 mole
Mass of H₂X = 0.0624 g
Molar mass of H₂X =?Molar mass = mass / mole
Molar mass of H₂X = 0.0624 / 0.000735
Molar mass of H₂X = 84.9 g/molThus, the molar mass of the diprotic acid, H₂X is 84.9 g/mol
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since matter can never be created nor destroyed where do the new substances come from?
Answer:
The Law of Conservation of Matter states that matter can never be created nor destroyed, only conserved. New substances form when bonds break and new bonds form. The chemical properties of the new substances are different from those of the original substances.
11
Directions: Select each correct answer. More than one answer may be correct.
Which of the following affects the force of gravity between two objects?
the objects' densities
the distance between the objects
the objects volumes
圖
the objects masses
Reset
Submit
Answer:
The objects masses and the distance between the object.
PLEASE ANSWER QUICK WILL GIVE BRAINLIETS
Answer:
W.
Explanation:
When something is solid, the particles move less. Also, they move less when they are colder.
What is the concentration of potassium ions in a solution obtained by mixing 480. mL of 0.410 M potassium hydroxide(aq) with 440. mL of 0.290 M potassium sulfate(aq). Enter your answer in decimal notation rounded to the appropriate number of significant figures.
The concentration of potassium ions, K⁺ in the solution obtained by mixing 480 mL of 0.410 M KOH with 440 mL of 0.290 M K₂SO₄ is 0.491 M
We'll begin by calculating the number of mole of potassium ion, K⁺ in each solution.
For KOH:Volume = 480 mL = 480 / 1000 = 0.48 L
Molarity = 0.410 M
Mole of KOH =?Mole = Molarity x Volume
Mole of KOH = 0.410 × 0.48
Mole of KOH = 0.1968 moleKOH(aq) —> K⁺(aq) + OH¯(aq)
From the balanced equation above,
1 mole of KOH contains 1 mole of K⁺
Therefore,
0.1968 mole of KOH will also contain 0.1968 mole of K⁺
Thus, 0.1968 mole of K⁺ is present in 480 mL of 0.410 M KOH
For K₂SO₄:Volume = 440 mL = 440 / 1000 = 0.44 L
Molarity = 0.290 M
Mole of K₂SO₄ =?Mole = Molarity x Volume
Mole of K₂SO₄ = 0.290 × 0.44
Mole of K₂SO₄ = 0.1276 moleK₂SO₄(aq) —> 2K⁺(aq) + SO₄²¯(aq)
From the balanced equation above,
1 mole of K₂SO₄ contains 2 moles of K⁺
Therefore,
0.1276 mole of K₂SO₄ will contain = 0.1276 × 2 = 0.2552 mole of K⁺
Thus, 0.2552 mole of K⁺ is present in 440 mL of 0.290 M K₂SO₄
Next, we shall determine the total mole of K⁺ in the resulting solution.Mole of K⁺ in KOH = 0.1968 mole
Mole of K⁺ in K₂SO₄ = 0.2552 mole
Total mole = 0.1968 + 0.2552
Total mole = 0.452 moleNext, we shall determine the total volume of the resulting solutionVolume of KOH = 0.48 L
Volume of K₂SO₄ = 0.44 L
Total volume = 0.48 + 0.44
Total volume = 0.92 LFinally, we shall determine the molarity of K⁺ in the resulting solutionTotal mole = 0.452 mole
Total volume = 0.92 L
Molarity of K⁺ =?Molarity = mole / Volume
Molarity of K⁺ = 0.452 / 0.92
Molarity of K⁺ = 0.491 MTherefore, the molarity of potassium ion, K⁺ in the resulting solution is 0.491 M
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What is the wavelength of green light (in nm) with a frequency of 5.98 x 1014 s-1?
A) 5.02 x 10-7 nm
B) 1.99 x 10-6 nm
C) 502 nm
D) 545 nm
E) 5.45 x 10-7 nm
Answer:
502nm
Explanation:
wavelength=3×10^7/5.98×19^14
A student weighs out a sample of 9.4 mg of an unknown metal. The sample of metal reacts with hydrochloric acid at a pressure of 1 atm and 25.0˚C to form 9.51 mL of hydrogen gas. Assuming the unknown metal has a +2 oxidation state, what is the identity of the metal?
The identity of the metal is Magnesium, Mg
Let the unknown metal be M
Next, we shall determine the number of mole of H₂ produced from the reaction.Pressure (P) = 1 atm
Temperature (T) = 25 °C = 25 + 273 = 298 K
Volume (V) = 9.51 mL = 9.51 / 1000 = 0.00951 L
Gas constant (R) = 0.0821 atm.L /Kmol
Number of mole (n) =?PV = nRT
1 × 0.00951 = n × 0.0821 × 298
0.00951 = n × 24.4658
Divide both side by 24.4658
n = 0.00951 / 24.4658
n = 3.89×10¯⁴ mole Next, we shall determine the mole of the metal needed to produce 3.89×10¯⁴ mole of H₂.M + 2HCl —> MCl₂ + H₂
From the balanced equation above,
1 mole of M reacted to produce 1 mole of H₂.
Therefore,
3.89×10¯⁴ mole of M will also react to 3.89×10¯⁴ mole of H₂.
Finally, we shall determine the identity of the metal, M.Mass of metal = 9.4 mg = 9.4×10¯³ g
Mole of metal = 3.89×10¯⁴
Molar mass of metal =?Molar mass = mass / mole
Molar mass of metal = 9.4×10¯³ / 3.89×10¯⁴
Molar mass of metal = 24.2 g/molComparing the molar mass of the metal with those in the periodic table, the identity of the metal is Magnesium, Mg
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An electron which has quantum numbers _______________ is degenerate with an electron with quantum numbers n = 3, l =2, ml =1, ms = - 1⁄2.
What does the solvent do in a solution
Answer:
In short, a solvent is able to dissolve a solute to form a solution. A highly polar solvent such as water is able to dissolve a polar solute. Take for example sodium chloride.
Explanation:
A solution with a volume of 4.0 L that contains 2.0 mol of KNOg has a molarity of
Answer:
0.5 M
Explanation:
The formula for molarity is M = n / v where
M is the concentration/molarity, n is the number of moles, and v is the volume in litres.
The molarity of this solution is 2 mol / 4 L = 0.5 M
what is the importance of vital registration system
Phương trình hóa học là gì
Explanation:
sự xuất bản hóa học nào? có một câu hỏi về khoa học mà bạn cần giúp đỡ? tôi luôn ở đây để giúp đỡ!
does titanium need to be processed before being used?
Answer:yes
Explanation:….
Answer:
It can be processed. It just has to be processed in batches, because it's not iron
Explanation:
Given:
2C8H18 + 250216CO2 + 18H20
In the combustion of octane, how many grams of oxygen are needed to completely react and produce 84.00 grams of
carbon dioxide? Use the periodic table to get the weights of the elements.
Drag the labels to the correct locations to complete the analysis. Each label can be used more than once.
1 mol
mol
8.
g
g
mol
1 mol
02
44.009
16
95.43
31.998
84.00
CO2
25
A sample of a compound has been analyzed and found to contain the following:
38.71% carbon, 9.75% hydrogen, and 51.54% g oxygen. If the molar mass of
the compound is determined by experiment to be between 62 and 63 g, what are
the empirical and molecular formulas of the compound?
Answer:
CH3O formula, C2H6O2 ACTUAL FORMULA
Explanation:
A sample of a compound has been analyzed and found to contain the following:
38.71% carbon, 9.75% hydrogen, and 51.54% g oxygen. If the molar mass of
the compound is determined by experiment to be between 62 and 63 g, what are the empirical and molecular formulas of the COMPOUND
empitical
take 100 gm of the compound
f O Divide by atomi wt of O to get moles
51.54/ 16.0 = 3.22
now if there is 1 atom of C and one of O, there will be 3 of H, so
CH3O is the empirical formula
the molar mass of the compound is 62-63. the mass of CH3O is
12 + 16 +3 = 31
2 X31 =62
so the compound is 2 times CH3O or C2H6O2
it most likely is
Ethylene glycol (name IUPAC: ethane-1,2-diol) is an organic formulated compound (CH2OH)2.
how to write the word boat in electronic configuration? need help asap
Answer:
Proper names of ships and other vessels should be italicized just as titles are. Keep in mind that although ship (or vessel) names should appear in italics, prefixes such as U.S.S. or H.M.S. should not.
Explanation:
What is a higland? Help now 50 points
Answer:
Noun
1. An elevated region; plateau:
He moved to a highland far from the river.
2. highlands, a mountainous region or elevated part of a country.
adjective
3: of, relating to, or characteristic of highlands.
The currents in our experiment are between 0 and 20 nanoAmperes. How many electrons per second are passing an ammeter if it reads 10 nA
The number of electrons per second passing an ammeter if it reads 10 nA is 6.24 × 10⁹ electrons per second
Since our current reads 10 nA and we require the number of electrons per second passing through the ammeter, 10 nA = 1 × 10⁻⁹ C/s.
Since there are 1.602 × 10⁻¹⁹ C/electron, the number of electrons per second, n = current/electron charge
= 1 × 10⁻⁹ C/s ÷ 1.602 × 10⁻¹⁹ C/electron
= 1/1.602 × 10¹⁰ electrons
= 0.62422 × 10¹⁰ electrons per second
= 6.2422 × 10⁹ electrons per second
≅ 6.24 × 10⁹ electrons per second
So, the number of electrons per second passing an ammeter if it reads 10 nA is 6.24 × 10⁹ electrons per second
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How many valence electrons does an atom of Iodine have?
a) 5
b) 6
c) 7
d) 8
Which statement accurately describes a potential danger of radiation?
-Any amount of radiation exposure is dangerous.
-Higher amounts of radiation will always lead to death.
-Medium levels of radiation exposure will do little harm.
-Even small amounts of radiation over a prolonged period of time can be dangerous.
Answer:
Even small amounts of radiation over a prolonged period of time can be dangerous.
Explanation:
We all get exposed to radiation, such as through x-rays, and it's fine as one off experiences. However, if you're constantly dealing with radiation without any sort of protection, no matter how small the amount is, it could potentially lead to consequences like cancer. This is due to the fact that radiation can alter our genes
An atom is electrically neutral because...
a. Neutrons equal the number of protons
b. Proton forces pull on the neutrons
C. Electrons equal the number of protons
d. Electrons equal the number of neutrons
Answer:
C. Electrons equal the number of protons
Explanation:
An atom is electrically neutral because...
a. Neutrons equal the number of protons
b. Proton forces pull on the neutrons
C. Electrons equal the number of protons
d. Electrons equal the number of neutrons
to be electrically neutral, the number os positive charges from thethe negative charges from the electrons
so
the number of protons must equal the number of electrons
ignore neutrons, they have NO charge
so
C. Electrons equal the number of protons
Help me out please!
Using Oxygen-16 as an example (identify the number of protons, neutrons, and electrons if):
a. Describe what would happen to the atom if a proton were added.
b. Describe what would happen to the atom if a neutron were removed.
c. Describe what would happen to the atom if two electrons were added.
Answer:
B. po
Explanation:
sana po makatulong
ANSWER QUICK!! IM GIVING 100 POINTS + BRAINLIEST FOR THE FIRST RIGHT ANSWER :)
Which are characteristics of the periodic table? (Choose all that apply.)
The elements that have been discovered so far can be found here.
It is arranged by the atomic number (number of protons).
The compounds that can be created are listed here.
It is arranged by all of the subatomic particles.
Answer:
A. The elements that have been discovered so far can be found here.
B. It is arranged by the atomic number (number of protons).
Explanation:
About the Answers:
All the elements that have been discovered are on the periodic table. Scientist know that there are still unknown elements and actually predict what they'll be like and what their properties are. The periodic table is arranged by the increasing number of atomic numbers. The atomic number is main identification of elements and is the amount of protons each element has.
About the Wrong Answers:
All the compounds that can be created are not found on the periodic table. In fact, there more than nine million organic compounds. The periodic table is not arranged by all of the subatomic particles. While the atomic mass and electron configuration is included, it is not arranged by it.
