Answers
Answer:
(C) NO2 has covalent bonds.
Related Questions
How many Moles are there in 8.55 x 10^24 molecules of NaCl?
Answers
Answer:
Moles = avogadro's constant divided by the number of molecules.
How do the equilibrium concentrations of the reactants compare to the equilibrium concentrations of the product?
Answers
Answer: It depends equilibrium constant K
Explanation: You need to to have reaction formula.
If K >> 1 then concentrations of products are much bigger than
concentrations of reactants. If K < < 1, concentration of products is small.
A community located downwind from a coal-fired power plant has seen a recent increase in the number of dead and dying trees. A so scientist measured values for the following parameters before and after the trees died off. Which of the following oil data should be used to determine if the coalfired power plant emiations were the cause of the damage to the trees
a. Moisture content and water retention
b. Parent material composition
c. Pesticide and herbicide residue levels
d. Calcium and aluminum levels
Answers
Answer:
Option D, Calcium and Aluminum levels
Explanation:
The coal fired power plant releases huge amount of particulate and gaseous emissions such as mercury, sulphur dioxide, nitrogen oxide etc. When there is rain, these gaseous and particulate matter comes to the ground along with rain water and pollute the soil. There are also chances of acid rain due to the presence of sulphur dioxide. Polluted soil and acid rain negatively impact the growth of the plants and causes leaching of Aluminium thereby decreasing the availability of calcium for the plants. Thus, the trees die. Hence, if the amount of Aluminium and Calcium in soil is determined, one can easily deduce the cause of death of trees.
Hence, option D is correct
According to theory, which term best describes the universe before the big bang?
a planet
a cloud of gas and dust
a star
a small densely packed ball of matter
Plz help
Answers
1. How many grams of water are in a cup containing
0.1 moles of H2O?
Answers
Answer:
Explanation:
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Food Science is the study of the physical, biological, and chemical makeup of food; the
causes of food deterioration; and the concepts ulderlying food processing.
True
False
Answers
Which of the following is true for a gas under conditions of very high pressure? (5
points)
1) PV > nRT, because the real volume of the gas would be more than the ideal
volume.
2) PV = nRT, because intermolecular forces are considerable at very high
pressures.
3) PV = nRT, because all gases behave as ideal gases at very high pressures.
04) PV = nRT, because the volume of the gas would become negligible.
Answers
Answer:
1) PV > nRT, because the real volume of the gas would be more than the ideal
volume.
Explanation:
According to the ideal gas equation; PV = nRT. Let us recall that this equation only holds under ideal conditions.
Gases exhibit ideal behavior under high temperature and low pressure. At higher pressure, the real volume of the gas is larger than the ideal volume of the gas.
Thus, at high pressure, PV > nRT, because the real volume of the gas would be more than the ideal volume.
Answer:
1) PV > nRT, because the real volume of the gas would be more than the ideal volume.
Explanation:
just took the test :)
Suppose the available nutrients in the soil of an ecosystem decrease. Over time, which adaptation is MOST LIKELY to evolve among the plants that survive there?
Answers
Answer:
Root system will become larger or extend farther
Explanation:
If nutrient in soil decrease, the plant's roots system will likely become larger and extend out deeper and farther to get all the nutrients it possibly can
How much heat must be absorbed by 375 grams of water to raise its temperature by 25 degrees Celsius? Specific heat for water= 4.184 J/g/C or K
Answers
Answer:
[tex]3.9*10^4 J[/tex]
Explanation:
See image for explanation!Answer:
[tex]\boxed {\boxed {\sf 39, 225 \ Joules}}}[/tex]
Explanation:
Since we are given the mass, temperature, and specific heat, we should use the following formula to calculate heat energy.
[tex]q=mc \Delta T[/tex]
We have 375 grams of water, the specific heat of water is 4.184 J/g ° C, and the temperature is raised 25 degrees Celsisus. Therefore:
m= 375 g c= 4.184 J/g °C ΔT= 25°CSubstitute the values into the formula.
[tex]q= (375 \ g)(4.184 \ J/g \textdegree C)(25 \textdegree C)[/tex]
Multiply the first two values together. The units of grams will cancel.
[tex]q=1569 \ J/ \textdegree C(25 \textdegree C)[/tex]
Multiply again. This time, the degrees Celsius cancel, so we are left with only the units of Joules.
[tex]q= 39225 \ J[/tex]
39,255 Joules of heat must be absorbed by the water.
Mercury: Mineral or Not Mineral? Mineral Not Mineral
Answers
Answer:
not a mineral but is a “mineraloid
Explanation:
not mineral
Explanation: its an element but it is not a mineral
in writing a chemical equation that produces hydrogen gas, the correct representation of hydrogen gas is
a.H
b.2H
c.H2
d.OH
Answers
Answer:
h2
Explanation:
What compound(s) does pure water contain?
Answers
The average kinetic energy of a sample of water molecules is –
a. always equal to zero
b. increased as the temperature is decreased
c. increased as the temperature is increased
d. unaffected by temperature changes
Answers
Answer:
c. increased as the temperature is increased
Explanation:
The average kinetic energy of a sample of water molecules is increased as the temperature is increased. Hence, option C is correct.
What is average kinetic energy?The average kinetic energy of the particles in a gas is proportional to the
temperature of the gas. Because the mass of these particles is constant,
the particles must move faster as the gas becomes warmer.
The average kinetic energy of gas molecules is directly proportional to
absolute temperature only; this implies that all molecular motion ceases
if the temperature is reduced to absolute zero.
Hence, option C is correct.
Learn more about the average kinetic energy here:
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What is consciousness? ...
Why do we dream? ...
Why is there stuff? ...
Are there other universes?
Answers
We dream because our brain creates mental images. We even dream about things that are unwelcome in our dreams.
Certain Stuff is there to help you. Others are there to bring you down.
Yes there are other universes. There’s a whole endless walk out there other than this cruel world.
Give the ratio that balances out the following equation: ___Cr + ___Pb(NO3)4 ---> ___ Cr(NO3)3 + ____ Pb
Answers
Answer: Ratio : 4, 3, 4, 3 are the answers.
Explanation:
What cell structure is best represented by the image?
A.
a non-permeable cell wall
B.
a selectively permeable membrane
C.
a waterproof nuclear envelope
D.
a permeable exoskeleton
Answers
Answer:where is the image
Explanation:
Answer:
B.
a selectively permeable membrane
Explanation:
A student determines that the theoretical yield of CaCO3, from a precipitation reaction is 21.5 grams
However, this student only recovers 19.9 grams of precipitate through filtration of the solution.
What would be this student's percent yield?
A. 92.6%
B. 0.93%
C. 108%
D. 85.6%
Answers
Answer:
92.6
Explanation:
What do calories provude for the human body?
Answers
Answer:
energy for the body to work
Explanation:
Which force is most responsible for binding together an atom’s protons and neutrons?
electrostatic
gravitational
nuclear
magnetic
Answers
gravitational force is most responsible for binding together an atom’s protons and neutrons.
What is gravitational force?In physics, gravity (from Latin gravitas 'weight') is a fundamental interaction which causes mutual attraction between all things with mass or energy. Gravity is by far the weakest of the four fundamental interactions, approximately 1038 times weaker than the strong interaction, 1036 times weaker than the electromagnetic force and 1029 times weaker than the weak interaction. As a result, it has no significant influence at the level of subatomic particles. However, gravity is the most significant interaction between objects at the macroscopic scale, and it determines the motion of planets, stars, galaxies, and even light.
On Earth, gravity gives weight to physical objects, and the Moon's gravity causes tides in the oceans. Gravity also has many important biological functions, helping to guide the growth of plants through the process of gravitropism and influencing the circulation of fluids in multicellular organisms. Investigation into the effects of weightlessness has shown that gravity may play a role in immune system function and cell differentiation within the human body.
The gravitational attraction between the original gaseous matter in the Universe allowed it to coalesce and form stars which eventually condensed into galaxies, so gravity is responsible for many of the large-scale structures in the Universe. Gravity has an infinite range, although its effects become weaker as objects get farther away.
Learn more about gravitational force
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Write and balance the equation for the neutralization reaction between phosphoric acid and
sodium hydroxide.
Answers
Answer: H3PO4(aq)+3NaOH(aq)→Na3PO4(aq)+3H2O(l)
Explanation:
mrs tuckers class is doing an experiment they fill up a cup with ice water they measure the temperature of both the water and the classroom after one hour . what will mrs tucker observe about the temperature of ice water after one hour
A. The temperature will increase
B. The temperature Will remain the same
C. The temperature will decrease greatly
D. The temperature Will decrease slightly
Answers
Hope this is the correct answer
Answer:
Ofc D. bc if the temp decreases, that means it is getting colder u dummy! But if it increases, it is getting warmer.
Explanation:
I got it right on USATestprep for using common sense, mark me the brainliest.
HCN
H:C:N:
3.
Is this Lewis Structure correct?
Answers
Answer:
No, your missing some bonds
what do adamantium,vibranium and unobtainum have in common
Answers
Answer:
they're all fake
Explanation:
Why do we need cells to divide? Give two examples.
Answers
Answer:
Cells need to divide to reproduce.
Explanation:
They go through numerous stages, such as mitosis to further replicate themselves. They can't get things done alone, so they have to work in numbers.
Strontium has 3 stable isotopes with mass numbers 86, 87 and 88. Their relative abundances are 9.97%, 7.0% and 82.6% respectively. How do the number of electrons and the electron configurations compare for atoms of the three isotopes
Answers
Answer:
38 and [Kr] 5s2.
Explanation:
The number of electrons and the electronic configurations are the same for the three isotopes of Strontium because in isotopes number of neutron increases not number of proton or electron. Isotope of element having the same atomic number but with different atomic masses due to increase the number of neutrons in each isotope. So the number of electron in all isotopes are the same i.e. 38 and the electronic configuration is also the same i.e. [Kr] 5s2.
15. Objects can have kinetic energy, potential energy, or both. Energy can be in the form of motion. Energy can
also be stored by objects in various ways, including position, chemical bonds, or physical state.
Which statement is true? And why?
a. An object’s mass has no effect on its potential energy.
b. Potential energy is converted to kinetic energy as a stationary object begins to move.
c. Kinetic energy is converted to potential energy as a stationary object begins to move.
d. A stretched rubber band stores no energy.
Answers
Answer: b because Potential energy is converted to kinetic energy as a stationary object begins to move.
Explanation:
A 1 liter solution contains 0.383 M hydrofluoric acid and 0.510 M potassium fluoride.
Addition of 0.096 moles of calcium hydroxide will:
(Assume that the volume does not change upon the addition of calcium hydroxide.)
Raise the pH slightly
Lower the pH slightly
Raise the pH by several units
Lower the pH by several units
Not change the pH
Exceed the buffer capacity
Answers
Answer:
Lower the pH slightly
Explanation:
The mixture of HF, hydrofluoric acid and KF, potassium fluoride produce a buffer that is defined for the equilibrium:
HF(aq) → H⁺(aq) + F⁻(aq)
The buffer can maintain the pH of a solution despite the addition of strong bases or acids.
The reaction of HF with Ca(OH)2 is:
2HF + Ca(OH)2 → 2H2O + CaF2
That means the calcium hydroxide is decreasing the concentration of HF. Based on the equilibrium, the H+ and F- ions will decrease in order to produce more HF. As H+ is decreasing due the equilibrium and not for the addition of a strong base, the pH is decreasing slightly.
Help!!I’ll put brainlist!
2. What is the molarity of a 0.30 liter solution containing 0.50 moles of NaCl?
3. Calculate the molarity of 0.289 moles of FeCl, dissolved in 120 ml of solution?
4. If a 0.075 liter solution contains 0.0877 moles of Cuco, what is the molarity?
Answers
Answer:
hope this helps
Explanation:
2. Well, we take the quotient...concentration=moles of solutevolume of solution
Explanation:
And thus concentration has the units of mol⋅L−1...
And so in this given scenario, the quotient gives....
concentration=[NaCl(aq)]=0.50⋅mol0.30⋅L=1.67⋅mol⋅L−1.
What are the concentrations with respect to [Na+], and [Cl−]?
3. molarity=2.41molL
Explanation:
Molarity=Moles of soluteLiters of solution
Moles=0.289
Solution=120mL=0.12L
Therefore,
Molarity=0.289mol0.12L≈2.41molL
4. 1.169 mol/L
Explanation:
From the question given, we obtained the following information:
Volume = 0.075 L
Mole of CuCo = 0.0877 moles
Molarity =..?
Molarity is simply defined as the mole of solute per unit litre of the solution. It is represented mathematically as:
Molarity = mole /Volume
With the above formula, we can obtain the molarity of the solution as follow:
Molarity = 0.0877 mol / 0.075 L
Molarity = 1.169 mol/L
Therefore, the molarity of the solution is 1.169 mol/L
How many electrons are in the highest occupied energy level of a neutral chlorine atom?
Answers
Magnesium hydroxide and sodium hydroxide are both strong bases. The pH of a saturated solution of sodium hydroxide is greater than 14. The pH of a saturated
solution of magnesium hydroxide is about 10.2. Why do the solutions have different pH values?
Answers
Answer: Solubility of NaOH is greater and there are more OH- ions in solution.
Explanation: Reactions : NaOH (s) ⇒ Na+ (aq) + OH- (aq)
Mg(OH)2 (s) ⇒ Mg2+ (aq) + 2 OH-(aq)
Although in same amount of moles, Mg(OH)2 produces
two (OH-)-ions in water solution, solubility of Mq(OH)2 is smaller.
Concentration [OH-]ions is smaller in saturated water solution
of Mg(OH)2