Answer:
D, E, A, B, C
Explanation:
The weakest base would be Cl- because HCl is a stronger acid than that of H3O+ from which the water is formed.
Also, for NH3 is a stronger acid than +NH4. Reason is that oxygen is more electronegative than nitrogen and thus NH3 is a stronger acid than NH4+.
The stronger, the acid, the weaker its conjugate base. Thus, NH3 is a weaker base than NH4.
NH2- has the highest basicity because nitrogen is less of an electronegative element than is oxygen. Therefore, it will not want a negative charge.
Hence, the final order in terms of increasing basicity is;
Cl-, H20, NH3, NH4, NH2-
PLEASE HELP ME ASAP AND DONT GUESSSS!!!!!!!
Answer:
Digestive
Explanation:
It is necessary for the body to function so it is technically an organ
Answer:
[tex]Question ...4 : D[/tex]
[tex]Question...5: B[/tex]
Explanation:
Hope this helps
Have a nice day
Lüderitz and Florianopolis are the same distance from the equator and they are both near the ocean. Use the information on the map to answer these questions: How does the air temperature of Lüderitz compare to the air temperature of Florianopolis? Why?
Answer: At Luderitz, only a little energy is transferred from the ocean to the air. At Florianopolis, a lot of energy is transferred from the air to the ocean. ... Even though the ocean water at each location is a different temperature, the same amount of energy is transferred to the air at both locations.
Explanation:
Both locations are at the same distance from the equator at Lüderitz, only a little energy is transferred from the ocean to the air. Hence option A is correct.
Where is Lüderitz ocated ?The Lüderitz is a coastal town and is located in southwestern nambia and is known for its colonial buildings. It has a desert climate and moderate temperatures throughout the year.
The windy and cold climate occurs due to the south Atlantic current. The place has a little energy that is transferred from the oceans to the air as compared to Florianopolis hat has lots of energy even though the water has different temperatures same energy is transferred to both locations.
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Most ecosystems originally get their energy from
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A student learns that salts like potassium chloride and sodium chloride are introduced in a weekly conducting solution. What option explains the chemical reactions that salts undergo and affect the conductivity of the solution?
a.Salts react chemically with the water particles and decrease the conductivity of the solution
b. Salts help to make the solution non-conducting by reacting with the particles of the solution
c. Salts mix with the particles of the weak conducting solution and helps to produce oxygen from the solution
d. Salts undergoes a chemical reaction with the particles of the solution and increase its conductivity
Answer:
d. Salts undergoes a chemical reaction with the particles of the solution and increase its conductivity
Explanation:
Salt compounds like potassium chloride (KCl) and sodium chloride (NaCl) mentioned in this question have the ability to disintegrate into their respective ions or charged atoms when dissolved in water. For example;
NaCl (aq) → Na+ + Cl-
However, these ions (Na+ and Cl-) are responsible for the ELECTRICAL CONDUCTIVITY of a solution. Hence, a salt compound when placed in an aqueous solution will form ions, which will conduct electricity. Hence, salinity of a solution increases its conductivity.
According to this question, salts undergoes a chemical reaction to with the particles of the solution to form ions that increase its conductivity.
how many grams of oxygen gas are there in a 2.3 L tank at 7.5 atm and 24 C
Answer:
22.6 g
Explanation:
First we use the PV=nRT equation:
P = 7.5 atmV = 2.3 Ln = ?R = 0.082 atm·L·mol⁻¹·K⁻¹T = 24 °C ⇒ 24 + 273.16 = 297.16 KWe input the data:
7.5 atm * 2.3 L = n * 0.082 atm·L·mol⁻¹·K⁻¹ * 297.16 KAnd solve for n:
n = 0.708 molThen we convert 0.708 moles of oxygen gas (O₂) to grams, using its molar mass:
0.708 mol * 32 g/mol = 22.6 gWrite a balanced chemical equation, complete ionic equation and a net ionic equation for Copper lll sulfate and zinc.
Answer: CuSO4 (aq)+ Zn (s) → Cu (s) + ZnSO4(aq)
Explanation: do you mean copper II sulphate CuSO4?
A hot piece of copper was dropped into 155 g of water at 23.6 °C and 2,100 J of energy was transferred to the water. What is the final temperature of the water?
Answer:
26.8 °C
Explanation:
Step 1: Given and required data
Mass of water (m): 155 gEnergy transferred to the water (Q): 2100 JInitial temperature of the water (T₂): 23.6 °CFinal temperature of the water (T₁): ? Specific heat of water (c): 4.184 J/g.°CStep 2: Calculate the final temperature of the water
We will use the following expression.
Q = c × m × (T₂ - T₁)
T₂ = 2100 J/(4.184 J/g.°C) × 155 g + 23.6 °C = 26.8 °C
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What is the molar mass of (NH4)2 CO3
Not sure if my answers are even correct. i am so confused
Answer:
#3 is the percentage for sodium i believe and 4 is right
Explanation:
If you were to heat up a 1-kilogram rock and 1 kilogram of water, you would see that the rock both gains heat and loses heat faster than the water. If you allow them to cool down, which one will come back to room temperature faster?
Answer: If you were to heat up a 1-kilogram rock and 1 kilogram of water and allow them to cool down, you would notice that the rock returns to room temperature much faster than the water
Explanation:
Answer:
If you were to heat up a 1-kilogram rock and 1 kilogram of water and allow them to cool down, you would notice that the rock returns to room temperature much faster than the water.
Explanation:
edmentum/plato
For the reaction
C2H4(g) + 302(g) → 2002 (g) + 2H20 (8)
if 6.0 mol of CO2 are produced, how many moles of Oz were reacted?
4.0 mol
0 7.5 mol
9.0 mol
o none of these
O 15 mol
Answer:
9.0 mol
Explanation:
C₂H₄(g) + 3O₂(g) → 2CO₂ (g) + 2H₂O (g)In order to convert from moles of CO₂ to moles of O₂, we need to use the stoichiometric coefficients in the balanced reaction. We use a conversion factor that has moles of CO₂ in the denominator and moles of O₂ in the numerator:
6.0 mol CO₂ * [tex]\frac{3molO_2}{2molCO_2}[/tex] = 9.0 mol O₂Barry makes a hypothesis that driving with his windows closed will increase
his gas mileage. If the gas mileage does not change, what should Barry do
next?
A. Conclude that the gas additive has gone bad
B. Assume that the hypothesis is not useful because it made a wrong
prediction
C. Change the results to show that the hypothesis is correct
D. Repeat the experiment to confirm the result
Answer: D. Repeat the experiment to confirm the results
i need help can someone help. pls
The simpler compounds/elements in a synthesis reaction will be in the___ side of the chemical equation
Answer:
Reactants
Explanation:
Synthesis is where two simpler compounds or elements combine. The left side with the simple elements are the reactants and the complicated synthesized compound is the product side.
Salt is an ionic compound that is produced when a cation and an anion from an acid-base reaction combine, and solutions of salts can be neutral, acidic, or basic, depending on the acid-base properties of the constituent cations and anions.
a. True
b. False
Answer:
a. True
Explanation:
The statement given regarding salt is correct,
Salt is ionic in nature, as it is composed of a positive ion, i.e. , cation and a negative ion, i.e. , anion.
Salt can be made by the combination of respective acid and base.
There are three nature of salt, acid, base and neutral.
Hence, from the given statement of the question,
The correct option is a. True.
D: ____________________________________________
E: ____________________________________________
Answer:
I think the awnser would be c urf mom
Explanation:
molecular formula citric acid2.A 10.0 mL sample of pineapple juice was titrated with 0.100 M sodium hydroxide solution. The average volume of NaOH required to reach the endpoint was 12.8 mL. a.Calculate the number of moles of sodium hydroxide required to reach the endpoint. Show your work in equation editor. Remember to use units and report your answer to the proper number of significant figures.
Answer: The number of moles of sodium hydroxide required to reach the endpoint is 0.00128
Explanation:
To calculate the number of moles for given molarity, we use the equation:
[tex]\text{Molarity of the solution}=\frac{\text{Moles of solute}\times 1000}{\text{Volume of solution in ml}}[/tex]
Molarity of [tex]NaOH[/tex] solution = 0.100 M
Volume of [tex]NaOH[/tex] solution = 12.8 mL
Putting values in equation, we get:
[tex]0.100M=\frac{\text{Moles of}NaOH\times 1000}{12.8ml}\\\\\text{Moles of }NaOH=\frac{0.100mol/L\times 12.8}{1000}=0.00128mol[/tex]
Thus the number of moles of sodium hydroxide required to reach the endpoint is 0.00128
4 points
1. What is the main source of energy for this food chain? *
Sun
Plants
Fish
Turtles
Sharks
O fish
O turtle
sun
O shark
Answer:
sun
Explanation:
all of the other things get their energy from the Sun
Answer:
sun
Explanation:
the sun is the main source of energy for plants, which are at the bottom of the food chain.
PLZ HELP ILL GIVE BRAINLIEST PLS 20 POINTS!!!.
Energy generated from wind has both advantages and disadvantages. What is true about wind energy?
No greenhouse gases are given off by wind power, but payback for construction takes many years.
Some erosion occurs around the towers of wind turbines, but electrical fires are highly unlikely.
There is enough wind power in the U.S. to drive the entire country, but aesthetic considerations cause some people to oppose its use.
Modern turbines are safe for birds and bats that fly in the area but can reduce the number of crops grown on farmland.
Explanation:
I wanna go with the 3rd option
Answer:
Its "There is enough wind power in the U.S. to drive the entire country, but aesthetic considerations cause some people to oppose its use."
Explanation:
Yw! :D took the test
One essential step in the manufacture of many plant fertilizers is the production of nitrogen monoxide gas, NO(g). This step is represented by the following balanced equation: 4 NH3(g) + 5 O2(g) --> 4 NO(g) + 6 H2O(l)
Determine the amount of oxygen needed to produce 1.2 x 104 mol of nitrogen monoxide gas.
Answer: 1.5 moles, or 48 grams
Explanation:
Set up the following:
[tex]\frac{1.2 x 10^4 mol NO}{1}[/tex] × [tex]\frac{5 mol O2}{4 mol NO}[/tex] = 1.5 moles of O2 needed
If you're also looking for the number of grams needed:
[tex]\frac{1.5 mol}{1}[/tex] × [tex]\frac{32 g}{1 mol}[/tex] = 48 grams needed
High Melting points
Ionic or covalent
ionic
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The diagram below represents H2 and Cl2 molecules that will potentially react to form HCI.
Hydrogen
Chlorine
Which of the following best describes this reaction?
А
The limiting reactant is chlorine.
B
The percent yield will be greater than 100%.
с
Hydrogen and chlorine are nonreactive.
D
All molecules shown will react to form the product.
The limiting reactant is chlorine in the given reaction of hydrogen and chlorine. Therefore, the correct option is option A.
What is chemical reaction?A chemical reaction is a procedure that causes one group of chemical components to change chemically into another. Chemical atom bonds are formed and broken during chemical reactions, which traditionally only involve changes in the locations of electrons.
The study of chemical processes involving unstable and radioactive materials, where both electronic or nuclear changes may take place, is known as nuclear chemistry. The limiting reactant is chlorine in the given reaction of hydrogen and chlorine.
Therefore, the correct option is option A.
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Each element is made of
A.many types of atoms
B.the periodic table
C.one type of atom
D.molecules
Select the statements that are true regarding open tubular and packed columns in gas chromatography.
A. For similar analysis times, open tubular columns provide better resolution than packed columns.
B. Packed columns offer increased sensitivity to small sample sizes.
C. Packed columns have a greater sample capacity than open tubular columns.
D. Open tubular columns give better resolution but longer analysis separation times compared to packed columns.
E. Packed columns give broader peaks with longer retention times.
Answer:
true or false :-
a) yes
b) no
c)yes
d)yes
e)no
For similar analysis times, open tubular columns provide better resolution than packed columns, Packed columns have a greater sample capacity than open tubular columns and Open tubular columns give better resolution but longer analysis separation times compared to packed columns are true regarding open tubular. Hence, options A, C and D are correct.
What is gas chromatography used for?The chemical constituents of a sample mixture are identified, separated, and quantified using an analytical technique called gas chromatography.
Gas chromatography is a technique for separating compounds in mixtures by injecting a gaseous or liquid sample into a mobile phase, which is usually referred to as the carrier gas, and passing the gas through a stationary phase. The mobile phase is often composed of an inert gas or an unreactive gas, such as helium, argon, nitrogen, or hydrogen.
Thus, options A, C and D are correct.
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directs all of the cell's activities.
a Endoplasmic Reticulum
b cell membrane
c Nucleus
d cytoplasma
HELP NEED THIS BADLLLLY !!!!!!!!!
Answer:
2 is correct
Explanation:
My friend for you this answer
For parts a & b below, derive only the initial value problem set up.
A tank of capacity 200 gallons holds 100 gallons of water with 25 pounds of sugar in solution. Pure water is poured into it at the rate of 2 gallons per minute, and the well-stirred mixture flows out of this tank at a rate of gallon per minute and into the second tank that initially contained 50 gallons of fresh water. The well-stirred mixture in the second tank is allowed to leave the tank at the same rate (1 gal/min).
1. Determine an Initial value problem that satisfied by the amount of sugar in the first tank (Tank A).
2. Determine an Initial value problem that satisfied by the amount of sugar in the second tank (Tank B).
Answer:
Explanation:
From the given information:
Let y(t) be the amount of sugar in tank A at any time.
Then, the rate of change of sugar in the tank is given by:
[tex]\dfrac{dy}{dt}= (rate \ in ) - ( rate \ out )[/tex]
The rate of the sugar coming into the tank is 0
[tex]\text{rate of sugar going out }= \dfrac{y(t) \ pound}{100}\times \dfrac{1 }{min} \\ \\ = \dfrac{y}{100} \ pound/min[/tex]
[tex]So; \\ \\ \\ \dfrac{dy}{dt} = 0 - \dfrac{y}{100} \\ \\ \implies \dfrac{dy}{y }= -\dfrac{dt}{100 } \\ \\ \implies dx|y| = -\dfrac{t}{100}+C \\ \\ \implies e*{In|y|}= e^{-\dfrac{t}{100}+C} \\ \\ \implies y = Ce^{-\dfrac{t}{100}}[/tex]
Initial amount of sugar = 25 Pounds
Now; y(0) = 25
25 = Ce⁰
C = 25
So; y(t) = 25 [tex]e^{-\dfrac{t}{100}[/tex]
Thus, the amount of sugar at any time t = [tex]\mathbf{25 e^{^{-\dfrac{t}{100}}}}[/tex]
B) For tank B :
[tex]\dfrac{dy}{dt}= 1 - \dfrac{y}{50 } \\ \\ \dfrac{dy}{dt}= \dfrac{50-y}{50} \\ \\ \dfrac{dy}{50-y }= \dfrac{dt}{50}[/tex]
if the pressure of 200 cm cube of a gas is half at constant temperature.what will be the new volume
Answer:
hbjeofjwwkjjhhwhhyuhcuh
Explanation:
bjsdhoooiiifckuvghvvr
A barometer is used to measure air pressure.
Please select the best answer from the choices provided
Т
F
One of the greatest dangers in a tornado is from flying objects. A 15 pound piece of lumber can turn into a flying missile that could severely damage walls and homes. A piece of steel with a mass of 200 pounds and travelling at the same velocity would cause even more damage. Select any evidence from the list below that you could use to explain why a 200 pound piece of steel would cause more damage than a 15 pound piece of wood travelling at the same velocity.
As the kinetic energy of an object increases, the force it can exert on another object decreases.
As the kinetic energy of an object increases, the force it can exert on another object increases.
Objects with more mass have less kinetic energy.
Objects with more mass have more kinetic energy.
As the velocity of an object increases, its kinetic energy decreases.
As the velocity of an object increases, its kinetic energy increases.
Answer:
As the kinetic energy of an object increases, the force it can exert on another object decreases.
Explanation: