Answer:
The fairly positive hydrogen on one HF molecule will be attracted to one of these lone pairs on a nearby HF molecule. This is a hydrogen bond. Hydrogen bonds are attractions between a δ+ hydrogen on one molecule and a lone pair on a very electronegative atom (N, O or F) on another molecule.
Explanation:
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
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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The sun causes a greenhouse effect on Earth. How is Earth impacted by the greenhouse effect? (1 It allows for oceans to warm up quicker than land. O It is the source of day and night on Earth O It allows for people to inhabit Earth It creates the different seasons that occur on Earth
Answer:
It allows oceanss to warm up
Explanation:
If you dont know what the greenhouse effect is,here is a definition for you. The greenhouse is a time period where the earth goes through changes. This is where the earth traps in gasses. When this happens,the earth produces oxegyn and carbon dioxide. Earth also traps in heat. So i think the answer might be it allows oceans to warm up quickerthan land. also...here is an extra fun fact. Scientist have found the moon is slowly moving away from earth.....i believe alien time....tell me what you think. I love a good debate...c-ya
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!!!!!
The coefficient in the formula above tells us there are:
A) eight Carbon atoms
B) 18 Hydrogen atoms
C) 2 molecules of octane
D) 28 total atoms
Answer:
the correct answer is c two molecules of octane
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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UNIT TEST
H electronegativity: 2.2
H valence electrons: 1
C electronegativity: 2.55
C valence electrons: 4
O electronegativity: 3.44
O valence electrons: 6
Chemical weathering over hundreds of thousands of years formed modern caves. One form of chemical weathering occurs when carbon dioxide reacts with water to produce carbonic acid, H2CO3. How many bonds formed in H2CO3?
(1 point)
eight
six
three
five
Answer:
Six
Explanation:
I just took it and that is the correct answer.
Carbonic acid is formed by the reaction of carbon dioxide and water. There are total six bonds in carbonic acid. Four bonds between carbon and oxygen and two bonds between oxygen and hydrogen.
What is carbonic acid?Carbonic acid is an inorganic acid formed by reaction water with carbon dioxide. The structure of carbonic acid H₂CO₃ is drawn in the uploaded image. Where, carbon bonds a double bond with one oxygen.
Carbon has a valency of 4 thus it forms 4 bonds with other atoms. Carbonic acid contains two OH groups where oxygen and hydrogen forms covalent bonds by sharing electron with each other.
The two oxygens in the OH group forms a single bond with carbon. Remaining one oxygen forms double bond with carbon.Thus, there are total 6 bonds formed between atoms. Hence, option b is correct.
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Help me clarify please!
I am calculating the overall mass for an atom. In other words, the whole number. I'll try to go in depth of what I mean.
Let's take a look at Germanium.
Its mass is 72.61.
When calculating the whole number as the overall atomic mass, do I input 72 or 73? Am I required to round at all times?
Answer:
Round to the number of significant figures in the original question. However, if you're going to proceed with further calculations using this mass, it's best not to round, as rounding will cause your answer to be less precise.
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
1. What is the primary composition of the objects that make up the Kuiper Belt?
Frozen rock, silicon, and metals
Frozen methane, ammonia, and water
Frozen iron, silicon, and sediment
Frozen methane, rock, and metals
9
Answer:
Frozen methane, ammonia, and water
Explanation:
The Kuiper Belt is made up of many solar system bodies that orbit around the sun outside Neptune’s orbit. The bodies, including some dwarf planets, are composed primarily of frozen volatile materials such as methane, ammonia, and water.
Kuiper belt is a circular disc in the outer solar system consisting of the remnants of planets. Mostly they are composed of frozen methane, ammonia and water. Thus option B is correct.
What is Kuiper belt?Kuiper belt is circumstellar body existing in the outer space and composed of methane, ammonia and water. It is named after the Dutch chemist Gerard Kuiper.
Kuiper belt is considered as an extension from the solar system from neptune. Around 50 AU from the Sun is where the Kuiper belt's inner, major area stops.
A second region known as the scattered disk overlaps the outer edge of the main Kuiper Belt and extends outward to almost 1,000 AU, with some planets on orbits that extend much beyond.
Unlike other rocks, Kuiper belts are made of frozen methane, ammonia and water. Thus option B is correct.
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CAN SOMEONE ANSWER ME PLZ I NEED AN ANSWER TO 5 AND 6!!
Answer:
did you use the internet
Explanation:
?????????????
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:
dilute hydrochloric acid solid s, gas g
Answer:
It forms weakly acidic carbonic acid and a strong base, sodium hydroxide. -The reaction of hydrochloric acid (HCl) and sodium carbonate (Na2CO3) yields a product of water (H2O), carbon dioxide gas (CO2), and table salt (NaCl).
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.
A compound which is an electron pair donor is generally classified as a????? urgent please
Answer:
A Lewis base is defined as any species that can donate a pair of electrons, and a Lewis acid is any species that can accept a pair of electrons. All Brønsted–Lowry bases (proton acceptors), such as OH−, H2O, and NH3, are also electron-pair donors.
What did you include in your response? Check all that apply.
The placement and organization of the electron changed.
Rutherford’s model identified electrons at a distance from the nucleus.
Bohr’s model identified the electrons at specific energy levels.
The modern atomic model includes the electron cloud
One of the primary functions of the digestive system is what
Answer:
Breaks down and absorbs nutrients from the food and liquids you consume to use for important things like energy, growth and repairing cells.
How many C atoms are there in a 46.2 gram sample of C?
What are 3 balanced chemical equations?
Balanced chemical equation - A chemical equation in which the number of each type of atom is equal on the two sides of the equation. Subscripts - Part of the chemical formulas of the reactants and products that indicate the number of atoms of the preceding element.
Examples of Balancing Chemical Equations
Example 1. C5H12 + O2 ---> CO2 + H2O. ...Example 2. Zn + HCl ---> ZnCl2 + H2 ...Example 3. Ca(OH)2 + H3PO4 ---> Ca3(PO4)2 + H2O. ...Example 4. FeCl3 + NH4OH ---> Fe(OH)3 + NH4Cl. ...Example 5. S8 + F2 ---> SF6 ...Example 6. C2H6 + O2 ---> CO2 + H2O. ...Example 7. Al2(CO3)3 + H3PO4 ---> AlPO4 + CO2 + H2O.When the pressure on a gas increases, will the volume
increase or decrease?
Answer:
20 is the answer
Explanation:
Please please help asap!!!
Answer:
5
Explanation:
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.
A chemist titrates of a benzoic acid solution with solution at . Calculate the pH at equivalence. The of benzoic acid is .
How does physics define work?
Answer:
In physics, work is the energy transferred to or from an object via the application of force along a displacement. In its simplest form, it is often represented as the product of force and displacement. A force is said to do positive work if (when applied) it has a component in the direction of the displacement of the point of application.
Explanation:
Hi!!
work, in physics, measure of energy transfer that occurs when an object is moved over a distance by an external force at least part of which is applied in the direction of the displacement
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
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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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
Suppose a 24.3 mL sample of xenon gas at 25.0°C and 1.01 atm is heated to 50.0°C and
compressed to a volume of 15.2 mL. What will be the pressure of the sample?
Answer:19222.1
Explanation:
ye pls give answer ye
what is the importance of vital registration system
