Answer:
option first is the right answer
16. You are running a TLC plate with a polar (A) and nonpolar substance (B); your solvent is a hexane and dichloromethane mixture (1:1). Substance B is traveling up the plate, but substance A has not traveled at all. What solvent might you add to the solvent mixture for substance A to move up the plate
Answer:
Acetone
Explanation:
Chromatography has to do with the separation of substances by eluting the components of the solute using a mobile phase. The composition of the mixture to be separated decides the mixture of solvents (mobile phase) that are to be used for elution.
In this case the mixture to be separated comprises of substance A which is polar and substance B which is non polar. It is observed that the mobile phase moves B up the plate but not the polar substance, A. This means that a polar solvent such as acetone should be added to the mobile phase in order to achieve better elution of A.
When a company is to calculate the selling price of their products, they set up a product calculation. There are five benefits to the business when making a product calculation. Explain these five benefits.
Answer:
The pricing strategy is an important element in setting up the selling price of a product.
Explanation:
The pricing strategy is an important consideration while fixing up the selling price of product manufactured. When setting up a selling price of a product, the companies set up product calculation. Businesses should decide the pricing strategy before they advertise the products to the customers.
There are mainly 5 benefits to the businesses while doing a product calculation. They are:
--- Doing competition based pricing enables the company to compete with the rival companies product and is based on the market based study. Competition pricing is a useful tool for the retailers as well as the small businesses.
--- Doing a cost plus pricing helps the total cost of making the product and also an add up in the market in order to determine the pricing of the product.
--- Dynamic pricing :
Dynamic pricing is a non static pricing. Dynamic pricing is an efficient method for the market based on the supply and demand.
--- Penetration pricing :
Penetration pricing is used by the large companies which is used to capture the market share by the setting product prices at the below market level so as to gain customers.
--- Doing a research for the price skimming helps the company to set up the accurate price for the product rather than readjusting the prices of the product later on based on the demand and the supply.
How many moles are in 1.4 x 10^21 atoms of sodium?
Answer:
devide by avogadro constant 6.02*10^23
Explanation:
Please help me in this question?
The answer is B
Explanation:
Can you mark brainliest I correct
Calculate the mass of 3.57 mol of magnesium nitrate, Mg(NO3)2.
Answer:
529.50g
Explanation:
Molar mass find by looking at the periodic table and add all the molar mass of the chemicals together
Mg=24.30g
N=14.01g
O=16.00g
Mg(NO3)2=24.30+(14.01+16.00x3)x2=148.32g/mol
148.32x3.57=529.50g
200g of water at 34.5°C are added to 150g of water at 87.6°C. What is the final temperature of the mixture?
Answer:
[tex]T_f=57.3\°C[/tex]
Explanation:
Hello there!
In this case, for this calorimetry problem, it is possible to realize that the hot water at 87.6 °C is cooled down whereas the cold water at 34.5 °C is heated up, according to:
[tex]Q_{cold}=-Q_{hot}[/tex]
Which in terms of mass, specific heat (cancelled out because they have the same value for being water) and temperature difference, is:
[tex]m_{cold}C_{cold}(T_f-T_{cold})=-m_{hot}C_{hot}(T_f-T_{hot})\\\\m_{cold}(T_f-T_{cold})=-m_{hot}(T_f-T_{hot})[/tex]
Thus, solving for the final temperature, we obtain:
[tex]T_f=\frac{m_{cold}T_{cold}+m_{hot}T_{hot}}{m_{cold}+m_{hot}}[/tex]
Then, we plug in to obtain:
[tex]T_f=\frac{200g*34.5\°C+150g*87.6\C}{200g+150g}\\\\T_f=57.3\°C[/tex]
Best regards!
total solar
eclipse where
only the corona
is visible is called?
Answer:
Chromosphere
Explanation:
Mark me Braainliest?
If 260 grams of KBR was dissolved in 200 grams of water at 100 degrees Celsius, the solution would be...
a.) saturated
b.) unsaturated
c.) supersaturated
d.) saturated with excess.
Answer:
d
Explanation:
because the water has to be more , the KBR Is (excess) but however it is saturated!
thank you
In a separate location, take notes from the sources you’ve identified. The notes will provide details for your paper. While taking notes, you may want to use these reading strategies. Use these sources if you find them helpful: Using your notes, compare the features of analog and digital signals in the table provided. Include one to three points for each feature and type of signal.
Answer:
Here is every answer for analog and digital (in order)
Analog:
Signal Shape: Smooth and continuousNumerical Values for Signal Measurements: Analog signals represent one continuous variable as the result of another continuous time-based variable. They are capable of outputting continuous information with a theoretically infinite number of possible values.Amount of Data that can be transmitted: analog circuits can conduct only fairly low-speed data communications. The maximum data rate over an analog facility is 33.6K bps when there are analog loops at either end. With 56K bps modems, only one end of the loop can be analog. The other end of the connection has to be digital. Energy requirements: light, sound, temperature, position, and pressurePrivacy and security (ability of the signal to be encoded in a secret code): not encryptedClarity of Signal: noise affects clarity and quality, noise is amplified, amplified noise causes more random information in the signal, signal bandwidth is lowDigital (in order):
Signal shape: stepping, square, and discreteNumerical Values for Signal Measurements: digital communication methods transmit a complete measured value, in other words both a numeric value and a unit of measurement Amount of data that can be transmitted: First of all, it is theoretically possible to transmit digital signals directly. Unfortunately when we use capacitors and inductors (energy storage devices) to match the impedance from the transmitter to the air (low impedance transistor say 5 ohms to 388 ohms (air)) these components introduce a bandwidth limiting match. Since all impulse functions have infinite bandwidth (transmitting a 1 and a zero) the bandwidth of the transceiver must be multi octave in order to have any reasonable efficiency. Systems engineers simplify the problem by introducing direct sequence modulation where a carrier is modulated 0/180 degrees dependent on the data rate.Energy requirements: voltage, accoustic pressure, and magnetization of a magnetic storage mediaPrivacy and security: encryptedClarity of signal: noise is lower in amplitude, electronics can ignore the noise, quality of signal is maintained, signal is highExplanation:
I did mine in bullet points, hopefully this helped!
Analog:
Signal Shape: Smooth and continuous
Numerical Values for Signal Estimations: Analog signals speak to one ceaseless variable as the result of another ceaseless time-based variable.
Amount of Information that can be transmitted: analog circuits can conduct as it were reasonably low-speed information communications.
Energy necessities: light, sound, temperature, position, and pressure Privacy and security : not encrypted
Clarity of Signal: clamor influences clarity and quality, commotion is amplified,
Digital:
Signal shape: stepping, square, and discrete
Numerical Values for Signal Measurements: digital communication methods transmit a complete measured value, in other words both a numeric value and a unit of measurement
Amount of data that can be transmitted: First of all, it is theoretically possible to transmit digital signals directly.
Energy requirements: voltage, accoustic pressure.
Privacy and security: encrypted
Clarity of signal: noise is lower in amplitude, electronics can ignore the noise, quality of signal is maintained, signal is high
Analog and digital is :Analog signal could be a continuous signal which speaks to physical estimations.
Digital signals are discrete time signals created by computerized balance.
Example :Human voice in discuss, analog electronic gadgets. Computers, CDs, DVDs, and other advanced electronic gadgets.
I stg these bots with links keep answering my questions so can anyone help me with this problem?
How many grams of chlorine gas are needed to react with 2.50 liters of a 3.34 molar potassium bromide solution?
Cl2 + 2KBr → 2KCl + Br2
According to the website that I use to figure out things about science or chemistry and that stuff... The answer is 3.5 L KBr x 1.7 mol KBr solute / 1 L KBr solution x 1 mol Cl2 / 2 mol KBr x 70.9 g Cl2 / 1 mol Cl2 = 211 g Cl2.
A Flame test is an example of chemistry property. What evidence can you use to back your statement up?
WILL MARK BRAINIEST!!
NO LINKS!! Which of the follow can NOT be possible
error that occurs during a lab experiment?
human error
O pure reactants were used
unexpected products were produced
the reaction didn't go to completion
Answer:
0 pure reactants
Explanation:
hope this helps!
A 25°C sample of gas has a volume of 5.0 L. What will it’s volume be if it is heated to 50.0°C?
What is the relative humidity if the dry bulb temperature is 16°C and the wet bulb temperature is 16°C?
Why is blood is sometimes called "the river of life"?
Answer:
Blood is liquid and red, just like a red river. And for humans without blood there is no life because there is nothing to transport nutrients and oxygen to the body cells. Hence blood is the red river of life.
Answer:
i think its because of how the blood is one of the main reasons we are alive today. And without it we'd die
Hydrogen and nitrogen react to produce ammonia gas as shown in the following chemical
equation.
N2 + 3H2 - 2NH:
How many grams of hydrogen must react to produce 31.5 grams of ammonia?
Explanation:
[tex]31.5 \: g \: aommnia \: \times \: \frac{1 \: mol \: ammonia}{8 \: g \: ammonia \: } \: \times \frac{3 \: mol \: hydrogen}{2 \: mol \: ammonia} \: \times \frac{1 \: g \: hydrogen}{1 \: mol \: hydrogen} = \: 5.90625 \: g \: hydrogen \: must \: react \: [/tex]
If I add 25mL of water to 125 mL of 0.25 M NaOH solution, what will the molarity of the diluted solution be?
Answer:
0.208333 M
Explanation:
M2=M1V1/V2=(0.25 M)(125mL)/(125mL+25 mL)= 0.208333 M
1.) Magnesium reacts with oxygen and forms magnesium oxide. Write the reaction, and explain how you would find the oxidizing agent
2.) What are two advantages and one disadvantage of fuel cells
3.) How are voltaic and electrolytic cells similar, and how are they different? Include electrodes and their charges in your answer
Answer:
See explanation
Explanation:
1) The reaction of magnesium with oxygen is;
Mg(s) + O2(g) -----> MgO2(s)
The oxidizing agent is the reactant whose oxidation number decreases from left to right in the reaction equation. The oxidation state of oxygen decreased from zero to -2 hence oxygen is the oxidizing agent in the reaction.
2) The advantages of fuel cell includes;
i) it is a clean source of energy
ii) Fuel cells operate quietly and do not constitute noise pollution
One disadvantage of the fuel cell is that its operation is costly.
3) Electrolytic and voltaic cell are similar because they are both electrochemical cells and involve a transfer of electrons between two electrodes.
Electrolytic cells do not operate spontaneously while voltaic cells operate spontaneously. In the volatic cell the anode is negatively charged while the cathode is positively charged. In the electrolytic cell, the anode is positively charged while the cathode is negatively charged.
What is the density of a block of wood with a volume of 16.5 ml and mass of 6.39g?
Answer:
0.38
Explanation:
The formula for finding density is mass/volume. So the equation becomes 6.39/16.5 which gives you 0.38
Calculate the mass of 488 moles of calcium carbonate, CaCO3
Help please!
Answer:
≅ 4.88 grams (3 sig. figs.)
Explanation:
to convert from ...
grams to moles => divide by formula wt.
moles to grams => multiply by formula wt.
this problem:
mass in grams = 488moles / 100.09g/mol = 4.875612 grams (calculator)
≅ 4.88 grams (3 sig. figs.)
Kindly answer the following questions.
In which class are you ?
In which country are you living ?
How many percent do you get in your previous class ?
Which is your fav. colour ?
Do you like dogs ?
Worst experience in your life ?
Answer:
Heyya!
Here are your answers along with the questions:-
1 Ques:- In which class are you ? Ans:- I study in 10th Grade!2 Ques:- In which country are you living ? Ans:- I live in the U.A.E - United Arab Emirates!3 Ques:- How many percent do you get in your previous class ?Ans:- I am not sure of that....I don't check my percentages just marks..but last term's marks would be about 90% I guess.4 Ques:- Which is your fav. colour ? ANS:- I love the color BLUE!5 Ques:- Do you like dogs ? Ans:- Yeah I do !6 Ques:- Worst experience in your life ? Ans:- I've had many bad experiences but the worst was when I almost lost my little brother at a mall and then we had to search for him for an hour. We had to run everywhere to find him and ask every single security guard whether they had seen him...I was super super scared cause I love my little bro so much and when we finally found him, he was simply standing near some ice-cream shop in the mall and chilling there..he was just 4 years at that time..oh god..i was super relieved to find him then!That's it! Hope my answers were clear!1.5
What is the purpose of adding sodium carbonate to the reaction mixture?
I
Answer: As sodium carbonate is added, bubbles of carbon dioxide form. When all the acid has been neutralised, adding sodium carbonate will no longer produce bubbles of carbon dioxide gas. The final rinsing with water should remove traces of the water soluble salt formed.
Explanation:
plzz mark as brainliest
how many neurons are in phosphorous
Answer:
16 neutrons
hope this helped
Answer:
There are approximately 31 Neutrons in Phosphorous.
Explanation:
The atomic number for Phosphorous is 15
The element category for Phosphorous is non-metal
The number of Neutrons in Phosphorous are 31
Hope this helps! :)
So I ordered a moonstone crystal and I was wondering if it’s real and is there anything I need about it??
Mmmmmmmh prolly fake stone
Answer:
GUESS IT IS FAKE.........?
Ribosomes are like tiny “factories” within cells that do all of the following EXCEPT
Answer:
translate DNA into RNA I hope it helps
How are ocean waves different from sound waves?
Answer:
Ocean waves are longitudinal waves, Sound waves are transverse waves. Ocean waves are electromagnetic waves, Sound waves are mechanical waves. A Sound wave of over 20,000 Cycles per Seconds is inaudible to Humans.
Explanation:
Answer:
Ocean waves are mechanical waves while Sound waves are electromagnetic waves
Explanation:
If you know about crystals can you tell me if this is real or fake because I purchased this item and don’t know
Identify each chemical reaction as endothermic or exothermic based on its description.
Answer:
Exothermic.
Explanation:
So if the sum of the enthalpies of the reactants is greater than the products, the reaction will be exothermic.
Many metals react with acids to produce hydrogen gas. A certain reaction produces 32.6 L of hydrogen gas at STP. How many moles of hydrogen were produced? *
22.4 mol
1.46 mol
730 mol
16.3 mol
Answer:
1.46 mol of H₂
Explanation:
This easy question can be solved by a rule of three.
At STP conditions, we know that 1 mol of any gas is contained in 22.4L.
So let's make the operation:
22.4L is the volume for 1 mol of any gas, at STP
32.6 L may be the volume for (32.6 . 1) /22.4 = 1.46 moles.
We can also apply, the Ideal Gases Law.
At STP conditions, Temperature is 273.15 K and pressure is 1 atm
P . V = n . R . T
n = (P . V) / R. T → (1 atm . 32.6L) / (0.082 . 273.15K)
n = 1.455 mol
How many grams of NaOH are there in 700.0 mL of a 0.18 M NaOH solution? *
a. 3.5 g
b. 2.19 x 10^-3 g
c. 149
d. 1149
e. 5.049
Answer:
E. 5.049
Explanation:
Multiply the concentration by volume (in liters) first to get moles of NaOH. Then multiply by the molar mass of NaOH to convert to grams.
0.18 M • 0.7000 L = 0.126 mol NaOH
0.126 mol • 39.997 g/mol = 5.040 g --> The closest answer seems to be e. 5.049 g
