Answer:
i moles of copper has 6.022 multiplied by 10raseto 23
Explanation:
please I need help with this it is A(n)_______ is made of the same_______all the way through.
Answer:
hi the ans is A.
..............
A current of 2.50 amps is passed through an electrolytic cell containing a solution of M(NO3)2, where M represents an unidentified metal. The only reaction that occurs at the cathode is the deposition of the unknown metal. After 2.00 hours, 5.93 g of the metal has been deposited.
Required:
Determine the chemical symbol of the metal.
Answer:
The chemical symbol will be "[tex]_{29}^{63.5}\textrm{Cu}[/tex]".
Explanation:
The given values are:
Current,
I = 2.50 amps
Time,
t = 2 hr
or,
= 7200 sec
Metal deposited,
W = 5.93 gm
As we know,
⇒ [tex]W=Z\times i\times t[/tex]
or,
⇒ [tex]Z=\frac{W}{i\times t}[/tex]
On putting the given values, we get
⇒ [tex]=\frac{5.93}{2.5\times 7200}[/tex]
⇒ [tex]=3.2945\times 10^{-4}[/tex]
hence,
⇒ [tex]Atomic \ mass=Z\times electrons\times 96500[/tex]
⇒ [tex]=3.2945\times 10^{-4}\times 2\times 96500[/tex]
⇒ [tex]=63.5[/tex]
Thus the above is the right answer.
What is the major function of the cell membrane?
Answer:
The plasma membrane, or the cell membrane, provides protection for a cell. It also provides a fixed environment inside the cell, and that membrane has several different functions. One is to transport nutrients into the cell and also to transport toxic substances out of the cell.
The state of matter of a substance is a physical property. A. True B. False
Answer:
I THINK IT IS TRUE BECAUSE THEY ERE FIRST FOUND TO DEMOCRITUS ARISTOTLE AND PLATO THE ROMANS AND GREEK CHEMISTS .
Explanation:
can someone please do this for me
2K(s) + F₂(g) --> 2KF(s)
The physical stare of potassium is solid(s) and that of potassium fluoride is solid(s) so, s will be put on both the blanks.
Now, In order to balance florine, we will put 2 for potassium floride, afterwards florone will be 2 on both side of equation but now potasium will become unbalnced so, we will put 2 for potassium. Thus, both sides of the equation will be balanced.
--------------------------------------------------------
P.S- Sorry, If I fail in properly explaining it to you.
Balance the equation.
Fe + Cl2 → FeCl3
A. Fe + 3Cl2 + 2FeCl3
B. Fe + 3Cl2 → FeCl3
C. 2Fe + 3Cl2 + 2FeCl3
Answer:
C. 2Fe + 3Cl2 + 2FeCl3
Explanation:
Hello there!
In this case, according to the given chemical reaction:
Fe + Cl2 → FeCl3
It turns out possible to balance it via cross-multiplying the chlorine atoms as they do not result from a whole number multiplication; it means we get:
Fe + 3Cl2 → 2FeCl3
And we just balance Fe by placing a 2 on Fe:
2Fe + 3Cl2 → 2FeCl3
Thus, the answer is C. 2Fe + 3Cl2 + 2FeCl3
Regards!
3. How many grams of aluminum can be heated from 90°C to 120°C if 500 J of heat energy are applied?
(c = 0.900 J/g °C)
We are given:
Initial Temperature = 90°c
Final Temperature = 120°c
Heat applied(ΔH) = 500 Joules
Specific heat(c) = 0.9 Joules / g°C
Mass of Aluminium(m) = ?
Change in temperature:
ΔT = Final temp. - Inital Temp.
ΔT = 120 - 90
ΔT = 30°c
Calculating the mass:
We know the formula:
ΔH = mcΔT
replacing the values:
500 = m(0.9)(30)
500 = m(27)
m = 500/27
m = 18.52 grams
Calculate the percent by volume of a solution with a volume of 400 mL that had 50 mL of isopropyl alcohol dissolved in it.
Answer:
50/400 × 100/1
0.125 × 100
= 12.5%
What is an acid?
A. A substance that increases the concentration of oxygen in solution
B. A substance that increases the concentration of OH ions in solution
C. A substance that produces hydrogen gas when dissolved
D. A substance that increases the concentration of Htions when dissolved
Answer:
A substance that produces hydrogen gas when dissolved
a. How many moles of ammonium sulfate will be produced with 25.56 grams of ammonia gas
react completely?
Magnesium metal reacts with hydrochloric acid to produce hydrogen gas and a solution of magnesium chloride. Write and balance the chemical equation for this reaction, and determine the volume of the hydrogen gas generated (at 1.00 atm, 25 °C) by reacting 10.0 g Mg with an excess of hydrochloric acid
Answer:
Mg + 2 HCl ⇒ MgCl₂ + H₂
10.1 L
Explanation:
Step 1: Write the balanced equation
Mg + 2 HCl ⇒ MgCl₂ + H₂
Step 2: Calculate the moles corresponding to 10.0 g of Mg
The molar mass of Mg is 24.31 g/mol.
10.0 g × 1 mol/24.31 g = 0.411 mol
Step 3: Calculate the moles of H₂ produced from 0.411 moles of Mg
The molar ratio of Mg to H₂ is 1:1. The moles of H₂ produced are 1/1 × 0.411 mol = 0.411 mol
Step 4: Calculate the volume occupied by 0.411 moles of H₂
0.411 moles of H₂ are at 1.00 atm and 25 °C (298 K). We can calculate the volume occupied using the ideal gas equation.
P × V = n × R × T
V = n × R × T / P
V = 0.411 mol × (0.0821 atm.L/mol.K) × 298 K / 1.00 atm = 10.1 L
What function is most affected if the sepal of a flower is damaged by air pollution?
Answer:answer in explanation try to understand dear
Explanation:Air pollutants have a negative impact on plant growth, primarily through interfering with resource accumulation. Once leaves are in close contact with the atmosphere, many air pollutants, such as O3 and NOx, affect the metabolic function of the leaves and interfere with net carbon fixation by the plant canopy.
Which shows a triglyceride?
Answer:
A
Explanation:
A triglyceride (TG, triacylglycerol, TAG, or triacylglyceride) is an ester derived from glycerol and three fatty acids (from tri- and glyceride). Triglycerides are the main constituents of body fat in humans and other vertebrates, as well as vegetable fat.
The structure of option A shows a triglyceride.
What is triglyceride?Triglycerides are a kind of fat present in the blood. Triglycerides are the types of stored fats, which are not in use currently.
The structure of triglyceride is TRI esters containing glycerol bound to three fatty acid molecules.
Thus, the correct option is A.
Learn more about triglyceride
https://brainly.com/question/13840067
#SPJ2
The forces between ________ are examples of electric forces.
A.
charged particles
B.
neutrons
C.
masses
D.
photons
Answer:
The answer would be charged particles.
Explanation:
Electric force exists as one of the most fundamental forces in the universe, it occurs between all charged particles.
please i need help really quickly on this. thank you
Answer:
the error could have been the fact that the unit for volume wasn't changed from cm³ to dm³
hence the calculation error
the solution to this would be first dividing the volume by 1000 to get that same amount in dm³ which is the standard unit to be used for volume-density calculations
find the pH of
2.1 x 10-3 [HCI]
Answer: pH = 2.68
Explanation: pH = - log[H3O^+] .
HCl reacts with water : HCl + H2O -> Cl^- + H3O^+
So [H3O^+] = c(HCl) = 0.0021 M
pH = - log(0.0021) = 2.68
Please help me! I don't understand this at all. All the info is in the picture. Thank you so much!!!
Answer:
H₂S + Cl₂ —> S + 2HCl
Explanation:
? + Cl₂ —> S + 2HCl
To balance the equation above, we must recognise what atoms are present in the products.
The products contains S, H and Cl.
Thus, S, H and Cl must also be present in the reactants.
Considering the equation given above, we can see clearly that H and S is missing in the reactants.
H and S together as a compound is expressed as H₂S.
Now, we shall input H₂S into the equation to obtain the complete equation. This is illustrated below:
? + Cl₂ —> S + 2HCl
H₂S + Cl₂ —> S + 2HCl
Next, we shall verify to see if the equation is balanced.
There are 2 atoms of H on both sides of the equation.
There are 2 atoms of Cl on both sides of the equation.
1 atom of S exist on both sides of the equation.
Thus, the equation is balanced.
If I have 18 liters of gas at a pressure of 88 atm, what will be the final pressure of the gas if the volume of the gas is decreased to 12 liters under constant pressure ? Show calculations.
Answer: You meant in constant temperature?
Because temperature is not mentioned at the beginning.
I suppose temperature remains constant, otherwise
there is no enough data for solving the problem
Explanation: According Boyle´s law in constant temperature
pV = constant. So p1V1 = p2V2 and pressure p2 = p1V1 /V2
= 88 atm · 18 l / 12 l = 132 atm.
If I have 18 liters of gas at a pressure of 88 atm, the final pressure of the gas if the volume of the gas is decreased to 12 liters under constant pressure is 132atm.
HOW TO CALCULATE PRESSURE?The pressure of gas at constant temperature can be calculated using Boyle's law equation as follows:
P1V1 = P2V2
Where;
P1 = initial pressure (88atm)P2 = final pressure (?atm)V1 = initial volume (18L)V2 = final volume (12L)The final pressure of the gas can be calculated as follows:
88 × 18 = 12 × P2
1584 = 12P2
P2 = 1584 ÷ 12
P2 = 132atm
Therefore, have 18 liters of gas at a pressure of 88 atm, the final pressure of the gas if the volume of the gas is decreased to 12 liters under constant pressure is 132atm.
Learn more about Boyle's law at: https://brainly.com/question/1437490
Calculate AGrxn for this equation, rounding your
answer to the nearest whole number.
AHM
2N2(g) + O2(g) → 2N (9)
163.2 kJ
ASX = -148 J/K
T = 298 K
AGO
kJ
Answer: The value of [tex]\Delta G_{rxn}[/tex] for given equation is 119.096 kJ.
Explanation:
Given: [tex]\Delta H = 163.2 kJ[/tex] (1 kJ = 1000 J) = 163200 J
[tex]\Delta S = -148 J/K[/tex]
T = 298 K
Formula used to calculate [tex]\Delta G_{rxn}[/tex] is as follows.
[tex]\Delta G_{rxn} = \Delta H - T \Delta S[/tex]
Substitute the values into above formula as follows.
[tex]\Delta G_{rxn} = \Delta H - T \Delta S\\= 163200 J - (298 \times -148 J/K)\\= 163200 J - 44104 J\\= 119096 J \\= 119.096 kJ[/tex]
Thus, we can conclude that the value of [tex]\Delta G_{rxn}[/tex] for given equation is 119.096 kJ.
Answer:
207
No, it is nonspontaneous at all temperatures
Explanation:
This is like 8 months later so im just putting this for people that need it still.
What is said to have occurred when an object experiences a frequency equal to its natural frequency?
frequency
diffraction
resonance
amplitude
Answer: Resonance
Explanation:
A resonance is said to occur when an object experiences a frequency that is equal to its natural frequency.
A resonance refers to the sound that's produced by an object when the object vibrates at an identical rate as the sound waves that is coming from another object.
Therefore, the correct option is C
What are alleles? Are theys ame or different
Answer:
Kind of like DNA or a part of DNA
Explanation:
They are what make you a person, no they aren't the same
When KCl(s) is dissolved in water, the resulting solution is classified as a
O heterogeneous compound
O homogeneous compound
O heterogeneous mixture
O homogeneous mixture
Answer:
O homogeneous mixture
Explanation:
When Kci is dissolved in water it becomes a solute in O homogeneous mixture
Describe the De Borglie's hypothesis
Answer:
The De Broglie hypothesis proposes that all matter exhibits wave-like properties and relates the observed wavelength of matter to its momentum. After Albert Einstein's photon theory became accepted, the question became whether this was true only for light or whether material objects also exhibited wave-like behavior.
II. The student then takes a 1.00 M stock
solution of table sugar
(sucrose, C12H22011) and mixes 0.305 L
of stock solution with additional
distilled water to create a dilute
solution with a total volume of 1.25 L.
• Explain how the student can
determine the molarity of the
resulting solution. Show a valid
calculation for the final molarity.
Answer:
0.244 M.
Explanation:
From the question given above, the following data were obtained:
Molarity of stock solution (M₁) = 1 M
Volume of stock solution (V₁) = 0.305 L
Volume of diluted solution (V₂) = 1.25 L
Molarity of diluted solution (M₂) =?
The molarity of the diluted solution can be obtained by using the dilution formula as illustrated below:
M₁V₁ = M₂V₂
1 × 0.305 = M₂ × 1.25
0.305 = M₂ × 1.25
Divide both side by 1.25
M₂ = 0.305 / 1.25
M₂ = 0.244 M
Thus, the molarity of the diluted solution is 0.244 M
Read the following chemical equation.
Cl2 (g) + K+ Br− → K+ Cl− + Br2 (g)
What most likely happens during this reaction?
Potassium loses an electron.
Potassium gains an electron.
Bromine loses an electron.
Bromine gains an electron.
Answer:
Bromine loses an electron.
Explanation:
Hello there!
In this case, according to the given chemical reaction, it will be possible for us to realize that as the reaction progresses, we see that the bromine, as it is initially negative, it increases the oxidation state as it loses an electron for which it is oxidized.
Moreover, no change is potassium is evidenced as it remains as the cation in the reaction; therefore, the answer is Bromine loses an electron.
Regards!
Answer:
The above answer is correct
Explanation:
I took the test
A patient with severe metabolic acidosis has a blood plasma pH of 6.90
What is the [OH−] of the blood plasma?
Answer:
7.94x10⁻⁸ M
Explanation:
Using the pH given by the problem, we can calculate the pOH of the blood plasma:
pOH = 14 - pHpOH = 14 - 6.90pOH = 7.10Then we can proceed to calculate the [OH⁻] of the blood plasma, using the definition of pOH:
pOH = -log[OH⁻]7.10 = -log[OH⁻]-7.10 = log[OH⁻][tex]10^{-7.10}[/tex] = [OH⁻][OH⁻] = 7.94x10⁻⁸ Mhow many electrons are in a titanium atom
Answer:
2, 8, 10, 2
Explanation:
Answer:
2, 8, 10, 2
Explanation: Titanium/Electrons per shell
How many moles are in 67.94 liters of O2?
I need this answered asap
Answer:
3.033
Explanation:
67.94/22.4= 3.033
I hope lol
Which two combinations will give you a TALL plant?
TT with Tt
or TT with TT
would give a tall plant
Need help ASAP please!
4 NH3(g) + 5 O2(g) --> 4 NO(g) + 6 H2O(g)
You need 16 moles of NO(g). How many moles of O2 do you need to start with?
Answer:
13 mol NO
Explanation:
Step 1: Write the balanced equation
4 NH₃(g) + 5 O₂(g) ⇒ 4 NO(g) + 6 H₂O(g)
Step 2: Establish the appropriate molar ratio
According to the balanced equation, the molar ratio of O₂ to NO is 5:4.
Step 3: Calculate the number of moles of O₂ needed to produce 16 moles of NO
We will use the previously established molar ratio.
16 mol O₂ × 4 mol NO/5 mol O₂ = 13 mol NO