Short Answer/Essay
Note: Your teacher will grade your responses to questions 19 and 20 to ensure you receive proper credit for your answers.
What is global warming? What can people do to reduce global warming?
Answer:
lol global warming is the gradual increase in the temperature of the earth and its atmosphere. this is do to the greenhouse effect caused by increased levels of carbon dioxide.
Explanation:
common knowledge
PLEASE HURRY I'M TIMED Where does the flow of energy begin in every ecosystem?
the consumers
the producers
the sun
the herbivores
Consider the reaction below.
HI + H2O → H30++
Which is an acid-conjugate base pair?
O HI and H20
O H2O and Hž0+
OH30+ and I
O HI and
Answer:
HI and I-
Explanation:
Hello there!
In this case, according to the acid ionization of hydroiodic acid:
[tex]HI+H_2O\rightarrow I^-+H_3O^+[/tex]
Now, since the acid, HI, results in the conjugate base, I- and the base, H2O in the conjugate acid, H3O+, it is correct to assert that the acid-conjugate base pair is HI and I-
Best regards!
The acid-conjugate base pair in the reaction above is HI and I-. Details about conjugate base can be found below.
What is a conjugate base?A conjugate base is the substance formed when an acid loses or donates its proton or hydrogen ion.
According to this question, the following reaction is given:
HI + H2O → H30+ + I-
The acid in this reaction is HI while the conjugate base is I-.
Learn more about conjugate base at: https://brainly.com/question/12883745
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What is the pH and pOH of a 2.34 x 10^-5 NaOH solution?
Answer:
pOH = 4.63
pH = 9.37
Explanation:
Because NaOH is a strong base, it will completely dissociate, which means you can find pOH by taking the negative log of the concentration of hydroxide ions: pOH = -log(OH) = -log(2.34 x 10⁻⁵) = 4.630784143
To find pH use 14.00 = pH + pOH
pH = 14.00 - 4.630784143 = 9.369215857
Calculate the concentration of the solution produced when 5.2g of potassium chloride is
dissolved in 200cm of water.
Answer: The concentration of solution is 0.35 M
Explanation:
Molarity of a solution is defined as the number of moles of solute dissolved per liter of the solution.
[tex]Molarity=\frac{n\times 1000}{V_s}[/tex]
where,
n = moles of solute
[tex]V_s[/tex] = volume of solution in ml = 200
moles of [tex]KCl[/tex] = [tex]\frac{\text {given mass}}{\text {Molar mass}}=\frac{5.2g}{74.5g/mol}=0.070mol[/tex]
Now put all the given values in the formula of molality, we get
[tex]Molarity=\frac{0.070\times 1000}{200}[/tex]
[tex]Molarity=0.35M[/tex]
Therefore, the concentration of solution is 0.35 M
An empty beaker weighs 20g and when filled with
Kensene weighs 60g. If the Volume of the kerosene is 15cm2 calculate
the density of the kerosene
Answer: The density of kerosene is [tex]2.7g/cm^3[/tex]
Explanation:
Density is defined as the mass contained per unit volume.
[tex]Density=\frac{mass}{Volume}[/tex]
Given : Mass of kerosene = mass of beaker with kerosene - mass of empty beaker = 60 g - 20 g = 40 g
Volume of kersone = [tex]15cm^3[/tex]
Putting in the values we get:
[tex]Density=\frac{40g}{15cm^3}[/tex]
[tex]Density=2.7g/cm^3[/tex]
Thus the density of kerosene is [tex]2.7g/cm^3[/tex]
what is electronic configuration
a student was investigating the reaction between marble chips and dilute hydrochloric acid
Answer:
Marble chips react with dilute hydrochloric acid to produce carbon dioxide gas. The rate of this reaction can be changed by changing the size of the marble chips.
Explanation:
Hope it helps u
FOLLOW MY ACCOUNT PLS PLS
2) A bicycle rider is traveling up a hill. When the rider reaches the top of
the hill, she stops to rest. Then she travels down the hill. The diagram
shows the rider in the three different positions. Which of these correctly
describes the potential energy and kinetic energy of the bicycle rider?
Answer: A: When the rider is at the top of the hill, her potential energy is greatest, and her kinetic energy is the least.
Explanation:
Humans have altered the composition
of Earth's atmosphere by
A. Making the air pressure drop
B. Making the air temperature drop
C. Polluting it with excess ozone
D. Polluting it with carbon dioxide gas
The answer is most likely D
If the pressure of a gas changes, but the number of moles and volume remain constant, which
of the following values must also change?
Answer:
Pressure
Explanation:
During an experiment a student placed a alible item in the gap of the circuit below the lightbulb turned on when the item was placed in the device that item cannot be classified as a—
Answer:
chicken
Explanation:
1
Select the correct answer.
When melted Iron solidifles without any change in temperature, what is happening on the atomic level?
ОА.
The iron atoms are gaining kinetic energy.
ОВ.
The iron atoms are losing kinetic energy.
Ос.
The iron atoms are gaining potential energy.
OD
The iron atoms are losing potential energy.
Reset
Next
Answer:
A. the iron atoms are gaining kinetic energy
Explanation:
when the iron melted and solidifies it loses potential energy and changes to kinetic energy
What volume of H2S is needed to produce 14.2 L of SO2 gas? The balanced equation is: 2H2S + 3O2 → 2SO2 + 2H2O.
Answer:
14.2 L H2S
Explanation:
Mole ratio
2 mol H2S:2 mol SO2
We are just looking for volume, so the required amount is the same as the produced amount as long as the mole ratio is balanced.
The balanced equation is: 2H2S + 3O2 → 2SO2 + 2H2O. Mole ratio 2 mol H2S:2 mol SO2.
What is Mole ratio?Two factors can be used to identify stoichiometry problems: the information provided in the problem and he information that needs to be solved for, also known as the unknown.
The given and the unknown might both be reactants, could both be products, or could both be products with one of them acting as a reactant. Mole amounts can be used to express the substance quantities.
However, it is typical in a laboratory setting to calculate a substance's mass in grams to determine how much of it is present. A gaseous substance's volume can be used to express its quantity.
Therefore, The balanced equation is: 2H2S + 3O2 → 2SO2 + 2H2O. Mole ratio 2 mol H2S:2 mol SO2.
To learn more about balanced equation, refer to the link:
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PLEASE HELP ASAP
which is a primary consumer?
Picture shown above
zooplankton cod and krill
Fill in the blank. The process of solid ice changing into liquid water is a (n) change.
Answer:
Melting
Explanation:
When solid ice gains heat, it changes state from solid ice to liquid water in a process called melting. Ice cubes in a cold drink, for example, gradually melt.
Which of the following is a property of water
Answer:
Where are the following?
Explanation:
The main properties of water are its polarity, cohesion, adhesion, surface tension, high specific heat, and evaporative cooling.
Answer:
It exists in all three states on Earth.
Explanation:
solid, liquid, gas
Compounds with a ring of resonance bonds are called
Answer:
they are aromatic compounds
Explanation:
all gotten from benzene
Are mossed and ferns climax community or pioneer species
Answer:
Pioneer species I believe.
Explanation:
A soccer ball is 0.5 kg and is traveling at a velocity of 3 m/s. Find the kinetic energy of the soccer ball using the formula given and the calculator attached.
Answer:
here
mass=0.5kg
velocity = 3m/s
now,
KE= 1/2mv^2
=1/2×0.5×(3)^2
=2.25j
Explanation:
May this will be helpful for you
In the reaction 4 Sb + 3 O2 --> Sb406, how many moles of antimony are
required to fully react with 8.00 moles of oxygen?
O 5.34 moles
O 10.7 moles
O 6.00 moles
O 12.0 moles
PLEASE HELP!!
Answer:
1.667 moles of antimony will be produced
the manager of a bookstore uses the equation s = p - 3.5 to find the price a student pays for books
ill mark brainliest
Answer:
Third one
Explanation:
Introduction: The (fictitious) town of Solutionville is trying to figure out a way to replace their current coal-fired power plants with cleaner and more sustainable energy sources. At a recent town meeting, it was proposed that the town build a nuclear power plant to replace coal as the community’s main source of energy for electricity.
Your Challenge: As a voting citizen of Solutionville, you must decide whether or not you support building a nuclear power plant to provide energy and electricity to homes and businesses in the community. This means carefully weighing the benefits and disadvantages of nuclear power.
1. Conduct research to learn more about nuclear power, and keep track of what you learn on slide#4 and/or in your notebook.
2. Make sure to write down the sources you get your information from, and be ready to defend the sources as credible.
3. Using the information you find, fill in the Benefits and Drawbacks Chart on slide #5 3. Be prepared to defend the information on your chart with evidence from your sources.
4. Analyze your findings, then find a partner and compare notes.
5. Decide whether or not you are in favor of or opposed to nuclear energy.
the questions involve other things that are not presented in the question, it is hard to answer this because of that sorry
Which solution has the highest boiling point?
1.0 M KNO3
2.0 M KNO3
1.0 M Ca(NO3)2
2.0 M Ca(NO3)2
The highest boiling point has been of 2.0 M [tex]\rm Ca(NO_3)_2[/tex]. Thus, option D is correct.
The boiling point has been the temperature at which the liquid starts to be converted to the gases. The boiling point has been higher when the inter-molecular forces between the molecules are higher.
With high inter-molecular forces, there has been higher amount of energy required to break the bonds, and change the state. The boiling point has also been dependent on the concentration, as higher the molecules present, there has been higher bonds, and more energy is required.
The Ca molecules has charge +2, while K has +1, this states, the stronger bonding of Ca with nitrate as compared to the K. Thus, calcium nitrate solution of 2 M has requires more energy, and thus have the highest boiling point.
The highest boiling point has been of 2.0 M [tex]\rm Ca(NO_3)_2[/tex]. Thus, option D is correct.
For more information about boiling point, refer to the link:
https://brainly.com/question/2153588
Why group the microscopic molecules known to form substances
that we find in the world, such as water and salt?
Answer:
Explanation:
he gave you a virus, dont click it
If you hear a weather report say that a low pressure system is coming in, what kind of
weather can you expect?
A
wind
B
polluted air
precipitation
D
heat
Answer:
It would be A
Explanation:
Answer:
A - wind
Explanation:
A low pressure system is a whirling mass of warm, moist air that generally brings stormy weather with strong winds. When viewed from above, winds spiral into a low-pressure center in a counterclockwise rotation in the Northern Hemisphere.
_______ have cells that are all dried out.
Explanation: the answer plant seeds
not skin
What are 2 diseases caused by coronaviruses?
4 InS03 + 3 RSC2 --> 2 In Sc3+3 RS04
Using the balanced equation, if you had 4.3 moles of InSoz, what volume would RS04 occupy at
STP?
Answer:
Explanation:
Calculate the average reaction rate. PLZ HELP TY!
Answer:
2 sec
Explanation: