Answers
Related Questions
Why is it difficult to say that plastics are directly causing illnesses?
Answers
Answer:
Because of the gravity of the Earth
A catalyst is:
one answer only pls help lol
Answers
Answer:
the second one
Explanation:
it makes the most sense
infrared in __________controls
I will mark briniest to the one who is correct, also its fill in the blank I wasnt paying attention in school
Answers
Answer:
remote
Explanation:
i hope it helps
the pressure of a 250.0 mL volume of gas under 4.0 atm of pressure is decreased to 1.0 atm at constant tempture what is a new volume
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Answer:
1000 mLExplanation:
The new volume can be found by using the formula for Boyle's law which is
[tex]P_1V_1 = P_2V_2[/tex]
Since we're finding the new volume
[tex]V_2 = \frac{P_1V_1}{P_2} \\[/tex]
We have
[tex]V_2 = \frac{250 \times 4}{1} = 1000 \\ [/tex]
We have the final answer as
1000 mLHope this helps you
Select the correct answer.
How does the equilibrium change with the removal of hydrogen (H2) gas from this equation?
2H2S ⇌ 2H2(g) + S2(g)
A.
Equilibrium shifts right to produce more product.
B.
Equilibrium shifts left to produce more reactant.
C.
Equilibrium shifts right to produce less product.
D.
Equilibrium shifts left to produce less reactant.
Answers
Answer:
the guy above is wrong
Explanation:
i just did the test and got it wrong
Would this be a strong or weak acid
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Answer:
It Should be Strong Acid
Explanation:
Strong acids and bases ionize fully in an aqueous solution. Weak acids and bases also ionize, but only partially and the reaction is reversible. So how do we know if an acid or base is strong or weak? A simple way to determine strength is to add the acid or base to water— high reactivity means a stronger acid or base. This reactivity is measured with a value called the Ka or Kb value. It tells us how reactive an acid or a base is based on how many hydronium or hydroxide ions are formed during the reaction. Hope it helps :)
Help a #QUEEN out PLSSSS!!!
Answers
At STP (101.3 kPa, 0 °C), what volume would 2.00 moles of oxygen gas occupy? The gas constant is 8.31
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Answer:
44.8 L
Explanation:
Ideal Gas Equation -
i.e.,
PV = nRT
where,
P = pressure
V = volume
n = moles
R = universal gas constant
T = temperature
Using the information given in the question, Volume of the gas can be calculated -
P = 101.3 kPa
V = ?
n = 2.00 moles
R = 8.31
T = 0 degree C = 273.15 K
Using the above data, and putting the data in the respective formula -
PV = nRT
101.3 kPa * V = 2.00 moles * 8.31 * 273.15 K
V = 44.8 L
Hence, the volume of the given gas = 44.8 L
How many grams of magnesium
sulfate (MgSO4) are dissolved in
0.965 L of a 0.0575 M solution?
Molar Mass Mg: 24.30 g/mol
Molar Mass S: 32.06 g/mol
Molar Mass O: 16.00 g/mol
Answers
Explanation:
Concentration question....
0.965L x (0.0575 mol MgSO4 / 1L) x (120.4g MgSO4 / 1 mol MgSO4) = 6.68g MgSO4
The concept molarity is used here to determine the grams of magnesium sulfate dissolved in 0.965 L of a 0.0575 M solution. The mass of magnesium sulfate in grams is 6.68 g.
What is molarity?The molarity of a solution is defined as the number of moles of the solute present per litre of the solution. It is generally represented by the unit mol/L. The equation used to calculate the molarity is:
Molarity = Number of moles of the solute / Volume of the solution in litres
The molar mass of MgSO₄ = 120.36 g/mol
We have 0.0575 M solution.
That is 0.0575 mol/L × 120.36 g/mol = 6.9207 g/L
Here we want mass in 0.965 L. So the mass is:
Mass = 0.965 L × 6.9207 g/L = 6.68 g
Thus the mass in grams of magnesium sulfate is 6.68 g.
To know more about molarity, visit;
https://brainly.com/question/16727614
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List the methods of separation used in water purification...... ( HELP PLEASE )
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Answer:
I can list four. These are the main ones.
Bolling
Filtration
Distillation.
Chlorination
Explanation:
What causes thermal pollution in rivers?
1. automobile exhaust
2. nuclear power plants
3. solar radiation
4. factory smokestacks
Answers
Answer:
nuclear power plants .....
At archery practice, Vladimir tests a bow and arrow he has recently designed. He is able to accelerate a 24.0-g arrow at an average rate of 70.0 m/s^2. What is the bows average force on the arrow
Answers
Answer: A
1.68 N
Explanation:
F = ma = 0.024(70.0) = 1.68 N
Construct an explanation for why the physical properties of the inner core, outer core, and lower mantle are essential for the development of Earth's magnetic field.
Answers
Answer:
The hot temperature of inner core and outer core is responsible for the production of magnetic field.
Explanation:
The physical properties of the inner core, outer core, and lower mantle are essential for the development of Earth's magnetic field because the very high temperature of inner core is responsible for the formation of magnetic field. If the inner core is not very hot so the magnetic field will not be generated and our earth's atmosphere will not be save from the solar wind. It can be blown away by the solar wind if this magnetic field is not present so we can conclude that the physical properties of inner core and outer core is important for the production of magnetic field.
pls show your work thank you will mark the Brainliest
Answers
Answer:
1.42L of the 9.0M NaOH are required
Explanation:
Molarity is an unit of concentration in chemistry defined as the ratio of the moles of a solute (In this case NaOH) and the volume of the solution.
To solve this question we must know the moles of NaOH required in 4.25L of a 3.0M NaOH as follows:
4.25L * (3.0moles / L) = 12.75 moles of NaOH are required
As all NaOH must come from the 9.0M NaOH the volume we need is:
12.75 moles NaOH * (1L / 9.0 moles NaOH) =
1.42L of the 9.0M NaOH are requiredDescribe the different energy levels of electrons in an atom.
Answers
Answer:
Explanation:
If it is at a higher energy level, it is said to be excited, or any electrons that have higher energy than the ground state are excited. They are then called degenerate energy levels.
How many grams are in 1.46 mol K2O?
Answers
Answer:
94.196 grams
Explanation:
Answer:
94.196 grams
Explanation:
12. In which equilibrium system will an increase in pressure cause a shift to the left?
A) C + O2(8) + CO2(8)
C) 2 Mg(s) + O2(8) + 2 MgO)
B) CaCO3s) <> CaO + CO2g)
D) 2 H2(g) + O2(g) + 2 H2O)
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D is the answer cause two h20 + o2(g)
What reaction would you expect chromium to have with water
Answers
Answer: It does not react with water, but reacts with most acids. It combines with oxygen at room temperature to form chromium oxide. Chromium oxide forms a thin layer on the surface of the metal, protecting it from further corrosion (rusting).
Explanation:
Pablo wants to enter the science fair. Which question could be answered through scientific investigation?
Answers
Answer:
Hello
Explanation:
utd847dcpyc08td0
1. If I have 45 L of He in a balloon at 25 degrees celsius and increase the temperature of the
balloon to 55 degrees celsius, what will the new volume of the balloon be?
Answers
Use Charles' Law: V1/T1 = V2/T2. We assume the pressure and mass of the helium is constant. The units for temperature must be in Kelvin to use this equation (x °C = x + 273.15 K).
We want to solve for the new volume after the temperature is increased from 25 °C (298.15 K) to 55 °C (328.15 K). Since the volume and temperature of a gas at a constant pressure are directly proportional to each other, we should expect the new volume of the balloon to be greater than the initial 45 L.
Rearranging Charles' Law to solve for V2, we get V2 = V1T2/T1.
(45 L)(328.15 K)/(298.15 K) = 49.5 ≈ 50 L (if we're considering sig figs).
One problem with chemical reactions is that it is impossible to lower activation energy.
A) True
B) False
Answers
Answer:
false
Explanation:
Choose the correct statement.
1. A single displacement reaction produces an element as a product.
2. A double displacement reaction occurs between an ionic and a covalent compound.
3. Products of a complete combustion reaction are carbon dioxide and water.
4. Synthesis and Decomposition reaction products cannot be predicted with certainty.
Answers
Answer:
1
Explanation:
single displacement replaces one element with another and it's product is a pure element.
can somebody explain two dimensional gas chromatography in arson investigation
Answers
Answer:
Comprehensive Two-dimensional gas chromatography, or GCxGC is a multidimensional gas
an amount of 54.11 grams of pentane, c5h12 ,is equal to
Answers
First you need to find the molar mass of pentane.
Molar mass of C is 12.01 and molar mass of H is 1.008.
12.01*5 +1.007*12 = 60.05 + 12.08 = 72.13 grams C5H12 per mole
54.11/72.13 = 0.75 moles C5H12
So your answer is 0.75 moles C5H12
HELP PLEASE!!!!! 10 POINTS
What does the third quantum number (ml) describe?
Answers
Answer:
A. The specific orbital within a sublevel
Explanation:
the third quantum number is also called the magnetic quantum number ([tex]m_{l}[/tex]) and it represents the number of orbitals within a subshell.
PLEASE HELP!! 10 POINTS!
what could the fourth quantum number of a 2s^2 electron be?
Answers
Answer:
D. ms=+1/2.
Explanation:
Hello there!
In this case, since the quantum numbers are known as:
* Principal quantum number (n) which cannot be zero. The allowed values of n are therefore 1, 2, 3, 4, and so on.
* Angular quantum number (l) is able to be any integer between 0 and n-1. If n = 2, for example, l can be either 0 or 1.
* Magnetic quantum number (m) is able to be any integer between -l and +l. If l = 3, m can be either -3, -2, -1, 0, +1, +2 or +3.
* Spin Quantum Number (ms): ms = +½ or -½. Accounts for the orientation of the spin axis of an electron as it is able to spin in only one of two directions.
Thus, since the fourth quantum number is ms, spin, we infer that the answer is D. ms=+1/2 because it represents the positive spin on 2s^2.
Best regards!
Answer: ms = +1/2
Explanation: a pex
Which of the following are also compounds? Select all that apply.
A.
CuFeS2
B.
H2O
C.
KCl
D.
Mg
E.
Cl
Answers
Answer:
option B,C and A are compound
The diagram below shows a group of water molecules.
The water molecules in the diagram are attracted to each other by
Answers
Answer:
hydrogen bonds, the positive and negative charges of the hydrogen and oxygen atoms that make up water molecules makes them attracted to one another.
What is the molarity of .65 L of solution containing 63 grams of NaCl? (dont forget to convert grams to moles)
Answers
Answer:
1.66 M
Explanation:
Molarity = moles/L solution
We have the following data:
mass NaCl = m = 63 g
volume of solution = V = 0.65 L
Thus, we first convert the mass to moles with the molar mass of NaCl (MM):
MM(NaCl) = 23 g/mol Na + 35.4 g/mol Cl = 58.4 g/mol
moles NaCl = m/MM = 63 g/(58.4 g/mol)= 1.08 mol
Finally, we divide the moles into the volume of solution to calculate the molarity:
M = moles NaCl/V = 1.66 mol/L
why does the earth experience seasons?