Answer:
I believe your answer is D. The use of light that has a lower frequency.
Hope this helped!
Will it make a difference if we swap the anode and cathode in electroplating?
Answer:
▪ Will it make a difference if we swap the anode and cathode in electroplating?
➢ If we interchange the two terminals after electroplating then the ions deposited on the plate will move again towards their original position.
[tex]TextFromYourMrEx...[/tex]
#CarryOnLearning
Explanation:
if we change the two terminals after electroplatingthen the ions deposited on the plate will move again towards their original position...
I have a crush but I don't know how to tell him that I like him what do I do?
Answer:
grab life by the balls and tell him. what harm will it do? you only live once
Answer:
start hanging out with him more
Explanation:
then gradually start giving hints or just ask him striaght up
14. A 500.0 ml flask contained O2 gas at 25.0°C at a pressure of 4.5 atm. What is the number
of moles in the flask?
Explanation:
3.Apply the ideal gas law: PV = nRT solving for n. Here you can use the pressure given in atm, but you must choose the 0.0821 atm L/mole K gas constant. Or you can change 4.5 atm to 3420 mm Hg and use the 62.4 mmHg L/mole K gas constant. You must change 500 ml to 0.5 L because both gas constants have units in L, and so the volume must be in liters so it can cancel out. And of course, you must change the temperature to Kelvin.
a. n = (4.5atm)(0.5L)
moliK)(298K) = 0.092 mole (0.0821 atmiL
b. 0.092mol 32g
⎛⎝⎜ ⎞⎠⎟ = 2.9 g
1mol
c. Remember that D = mass
vol so D = 2.9g
0.5L = 5.9 g/L
Describe how the meniscus is used to read volume measurements on a graduated cylinder
Answer:Tthe liquid in a graduated cylinder curves up at the edge where the liquid meets the wall of the cylinder. This curve in the liquid is called the meniscus and is used to determiine the volume of liquid in a graduated cylinder by observing the measurement tick closest to the bottom of the meniscus.
Explanation:
Hope it helps :D
Balance the Chemical reaction
2CH4—C2H6+3H2O
Answer:
2CH4 - - - > C2H6+3H2O
2C2
8H12
0O3
6CH4 + 3O - - - > 3C2H6+3H2O
6C6
24H24
3O3
I added oxygen to the reactant side because I presumed this must be a combustion of methane; since, H2O is made in the product side.
Hope this helps!
If 4.644.64 mol of NO2NO2 occupy 25.925.9 L, how many liters will 2.732.73 mol of NO2NO2 occupy at the same temperature and pressure
Answer:
I will assume that the moles are all mistyped and will change them to:
4.64, 25.9, and 2.73.
15.2 liters
Explanation:
Both situations can be described using the ideal gas law:
PV=nRT,
where P, V, and T are the pressure, volume, and temperature (in degrees K). n is the number of moles. R is the gas constant.
First NO2 : P1(25.9L) = (4.64moles)RT
Second NO2: P2V2 = (2.73moles)RT2
Divide one equation by the other:
(P1(25.9L) = (4.64)RT1)
P2V2 = (2.73)RT2
The temperatures, pressures, and gas constants are unchanged, so we can cancel those to obtain:
(25.9L)/V2 = (4.64/2.73)
V2 = (25.9L)(2.73/4.64)
V2 = 15.2 Liters
Does Jarren love Maria more or does Jarren love Maria more??
Help please (not for school though)
How many compounds are found in 2.3 moles of Ca(NO3)2?
Answer:
For every 1 Ca(NO3)2 there are six (2 * NO3 or 2 * 3 O) oxygens. If you have 3 mole of Ca(NO3)2 then you have 18 mole of oxygen atoms (3*6).
Explanation:
The substances produced i. A chemical reaction are called?
Answer:
it’s called a product
Explanation:
think of the different chemicals as a math problem you add two or more things together and you get the product
A chemical reaction is a process in which one or more substances, also called reactants, are converted to one or more different substances, known as products.
10.
What are the products of a neutralization reaction?
an acid and a base
a salt and water
a salt and an acid
water and a base
Answer:
Salt and water
Explanation:
The reaction of an acid and a base forming a salt and water.
How many milliseconds (ms) are there in 3. 5 seconds (s)? 35 ms 350 ms 3,500 ms 35,000 ms.
Measurement units are the defined units used for the particular dimensions and proportions. 3500 milliseconds are there in seconds.
What is the unit of time?Time is defined as the rate of things occurring or taking place and is given by seconds, minutes, hours etc.
Using the conversion factor the relation between the seconds and milliseconds is:
1 second = 1000 miliseconds
Convert 3.5 seconds into milliseconds using conversion factor:
[tex]\begin{aligned}3.5 \;\rm seconds &= 3.5 \times 1000 \\\\&= 3500 \;\rm miliseconds\end{aligned}[/tex]
Therefore, option C. 3500 milliseconds is correct.
Learn more about time and second here:
https://brainly.com/question/2025518
Answer:
3500 ms
Explanation:
please help 500 J of work are done on a box when it is pulled horizontally across a frictionless floor by a force of 50 N. How far did the box slide?
A. 15 m
B. 1 m
C. 10 m
D. 100 m
Answer:
C: 10m
Explanation:
Work Done = Force x Distance
500 = 50 x Distance
To get to 500 multiply 50 by 10!
So, the box slid 10m.
Hope this helps and have a good day! ;D
How to convert formula equations into word equations
Answer:
I don't know what is the answer of it
HELP!! ASAP! GIVING 10 POINTS AND BRAINLIEST!!
What is one reason why transpiration is important in plants?
Question 17 options:
It produces food from the sugar in the plant cells.
It enables the flow of water out of the plant.
It produces carbon dioxide in the leaves of the plant.
Answer:
The Answer Is B.
Explanation:
Give Brainliest.
(Help Me Please!)
A student collected the data shown above. Row A may represent error
B
C
D
E
The time for one cycle of a periodic process is called the:.
Answer:
Period
Explanation:
I believe your answer should be period.
I hope it helps! Sorry if it didn’t… Have a great day!
Layla~
The molar mass of bismuth (\ce{Bi}BiB, i) is \pu{208.98 g/mol}208.98 g/mol208, point, 98, space, g, slash, m, o, l.
Calculate the mass in grams of a sample of \ce{Bi}BiB, i containing \pu{7.35x10^23}7.35×10
23
7, point, 35, times, 10, start superscript, 23, end superscript atoms.
A sample of a gas in a rigid container at 35.0oC and 1.85 atm has its temperature increased to 48oC. What will be the new pressure?
Answer:
Standard pressure is always 1.00atm. Example #1: How many moles of oxygen will occupy a volume of 2.50 L at STP? Standard temperature = 273K law.
Explanation:
Answer:
2.07 atm
Explanation:
On a summer day early in the moming, a balloon is filled with helium when the temperature
is 21°C, but the temperature will reach a peak of 46°C later in the day. The balloon holds 12.8 L of helium gas at a starting pressure of 239 kPa. The balloon will burst when the internal pressure (Pb) reaches 256 kPa. Answer the following questions and show your
work
1. How many moles of helium gas are in the balloon?
2. What will the gas pressure be in the balloon at the peak temperature?
3. Will the balloons burst when the temperature reaches 42 degrees Celsius? Explain.
4. To what pressure should the helium gas pressure be reduced to avoid bursting the balloon? (Assume no significant volume change of the balloon)
Any help I’d great! Equations are not my strong suit
Based on the data provided;
number of moles of helium gas is 1.25 molespressure at peak temperature is 259.3 kPainternal pressure is above 256 kPa, therefore, the balloon will burst.pressure should be reduced to a value less than 256 kPa by reducing the temperatureWhat is the ideal has equation?The ideal gas equation relatesthe pressure, volume, moles and temperature of a gas.
The moles of helium gas is calculated using the Ideal gas equation:
PV = nRTn is the number of moles of gas
R is molar gas constant = 8.314 L⋅kPa/Kmol
P is pressure = 239 kPa
T is temperature = 21°C = 294 K
V is volume = 12.8 L
Therefore;
n = PV/RT
n = 239 × 12.8 / 8.314 × 294
n = 1.25 moles
The number of moles of helium gas is 1.25 moles
At peak temperature, T = 46°C = 319 K
Using P1/T1 = P2/T2
P2 = P1T2/T1
P2 = 239 × 319/294
P2 = 259.3 kPa
The pressure at peak temperature is 259.3 kPa
At 42°C, T = 315 K
Using P1/T1 = P2/T2
P2 = P1T2/T1
P2 = 239 × 315/294
P2 = 256.07 kPa
Since the internal pressure is above 256 kPa, the balloon will burst.
The pressure should be reduced to a value less than 256 kPa by reducing the temperature.
Learn more about gas ideal gas equation at: https://brainly.com/question/12873752
A dead fish has washed up on the beach and is starting to decay. Which compound produces the unpleasant odor from the decaying fish?
A. pentane-1,5-diamine
B. hexane-1,5-diamine
C. hexane-1,6-dithiol
D. 2-pentanone
Answer:
A. Pentane- 1,5-diamine
Explanation:
I just did this in chemistry today
Answer:
The other person is correct.
Explanation:
You should give him brainiest.
1. Explain the data. Is there any evidence that a reaction has occurred?
2. Does the conductivity increase or decrease?
3. What is the indicator of the number of ions in solution?
4. How does this evidence indicate that the reaction has occurred between ions?
5. The Ba(OH)2 dissociates as Ba+² +2 OH. H2SO4 dissociates as 2 H+ +SO4-2. Write a balanced equation for this reaction.
6. When the conductivity is at a minimum, what must be true about the amount of Ba(OH)2?
7. Why does it not conduct at a low point?
8. Why does it conduct more before and after this minimum point?
If anyone has even one answer to any of these, that'd be really helpful!! Thank you! ^^
The appearance of ions in solution makes a solution to conduct electricity.
What is conductivity?Conductivity refers to the flow of current through a solution.
1) There is an evidence that reaction has occurred because of the formation of a precipitate
2) The conductivity decreases as more H2SO4 was added.
3) The indicator of the number of ions in the solution is the current recorded.
4) This evidence indicates that a reaction has occurred because the formation of a precipitate decreases the current.
5) Ba(OH)2(s) ----> Ba^2+(aq) + 3OH^-(aq)
H2SO4(aq) ---> 2H^+(aq) + SO4^2-(aq)
6) When the conductivity is at the minimum, It means that the Ba(OH)2 is largely undissociated.
7) It does not conduct at a low point because there are no ions in solution.
8) It conducts more before and after this minimum point because of more ions in solution.
Learn more about conductivity: https://brainly.com/question/5816303
What is the empirical formula for a compound that contains 17.34% hydrogen and 82.66% carbon?
CH2
C5H
C2H5
CH3
Answer:
C2H5
Explanation:
you first find the number of moles of both substances then divide by the lowest number in this case carbon was 1 and hydrogen was 2,515... then you multiply by a whole number which was 2 then it was now C2H5
(PLEASE HELP WILL MARK BRAINLIEST!!) A scientist wants to develop a new chemical. In one or two sentences, create a science question and a non-science question that the
scientist could consider when developing the new chemical.
Answer:
Science Question: What will the combination of the resources I use to make this new chemical do to different living organisms and non-living organisms around an environment?
Non-Science Question: What should we call this new chemical?
Explanation:
I hope this helps! If you don't like these questions I've got a few more that may work to your liking! :)
A force of 129,000 N is accelerating a car at 84 m/s/s
what’s the mass of the car?
6) The average atomic mass of boron, B, is 10.811 amu. The natural abundance of 10B is 19.7% and it’s exact mass is 10.012 amu. Calculate the exact mass of the second isotope of boron.
Hope you could understand.
If you have any query, feel free to ask.
If a driver takes 30 min to get to the town market, which is 1.5 km away from his house, what is his average speed?
Note: Unit for average speed is km/h
Answer: 0.83 m/s
Linear motion consists of 2: constant velocity motion with constant velocity and uniformly accelerated motion with constant acceleration
A gas at a pressure of 608 mmHg is held in a container with a volume of 545 mL. What is
the volume at standard pressure?
Answer:
441.81 mL
Explanation:
P1 x V1 = P2 x V2
V2 = P1 x V1 / P2
V2 = 608 x 545 / 750
V2 = 331360 / 750
V2 = 441.81 mL
MARK AS BRAINLIEST.
4. Which location (a, b, or c) would have the highest temperature?
5. Which location(a, b, or c) would have the lowest temperature?
6. Give reasoning to explain how and why the latitude of a place on Earth affects its average temperature.
answer fast worth 100 POINTS AND WILL MARK BRAINLEST
#4
c is right above the earth's crest so it absorbs most earth .so highest temperature
#5
a is at top hence least heat absorbs so least temperature
#6
Higher the attitude lower the temperatureLower the attitude higher the temperatureWhy does a beam of light bend when it passes into a new medium?
Answer + Explaination: A beam of light bends when it passes into a new medium because light travels slower in denser medium.
1. What are some things that gray wolves eat?
A. large and small animals
B. trees and plants
C. fruits and insects
D. humans and their pets
Answer:
A, and C are foods that wolves eat.
Explanation: Hope this helps