Chemistry College

Which nitrogenous base is NOT found in DNA? *
A. cytosine
B. guanine
C. uracil
D. adenine

Answers

Answer 1

Answer:

c. uracil

Explanation:

uracil is not found in DNA. the missing base would be thymine

Related Questions

Select the valid ways to make an ammonia/ammonium buffer for use in the laboratory. Mix equal volumes of 1 M NH3 and 0.01 M NH 4. Mix some volume of 1 M NH3 with half as much 1 M HCl. Mix equal volumes of 1 M NH3 and 1 M NH 4. Mix equal volumes of 1 M NH3 and 1 M HCl.

Answers

Answer:

The answer is "Option b and Option c".

Explanation:

This buffer is a buffer of ammonia and ammonium ion. Thus it requires the solution [tex]NH_3 \ \ and \ \ NH_4^{+}[/tex].

In point 1:

The solution containing [tex]NH_3 \ \ and \ \ NH_4^{+}[/tex] at 1M concentration would be given by mixing the two solutions. Thus, this buffer is a legitimate route.

In point 2:

It gives the ions you want but they are not the same.

In point 3:

[tex]1 M[/tex] [tex]NH_3[/tex] and [tex]1 M[/tex][tex]HCl[/tex] volume would not produce the same [tex]NH_3 \ \ and \ \ NH_4^{+}[/tex] concentrations. Therefore, this buffer isn't a valid route.

In point 4:

Some [tex]1 M[/tex] [tex]NH_3[/tex] volume and half [tex]HCl[/tex] . This offers the same rate as half.

2. What organelle in plant cells makes it possible for plants to carry out photosynthesis?
a. cell wall
b. chloroplast
C. lysosome
d. nucleus

Answers

the answer is b. chloroplast

I a doing an exam in science pls help.


What type of energy comes from the motion of tiny particles of matter?

Answers

Answer:

heat

Explanation:

Answer:

Thermal Energy

Explanation:

True/False –Similar to liquids, gases cannot be compressed.

Answers

Answer:

False

Explanation:

A liquid has a definite shape and takes on the volume of its container. A gas has both the shape and the volume of its container. The particles in a gas cannot be compressed into a smaller volume. Liquids tend to contract when heated.

Hope this helps

You prepare a standard by weighing 10.751 mg of compound X into a 100 mL volumetric flask and making to volume. You further dilute this solution 5 mL to 25 mL. This standard gives an area of 4,374. Your sample is prepared by adding 5 mL of sample solution into a 50 mL flask and making to volume. This gives an area count of 2,582. Calculate the concentration of compound X in the sample - prior to dilution.

Answers

Answer:

0.12693 mg/L

Explanation:

First we calculate the concentration of compound X in the standard prior to dilution:

10.751 mg / 100 mL = 0.10751 mg/mL

Then we calculate the concentration of compound X in the standard after dilution:

0.10751 mg/mL * 5 mL / 25 mL = 0.021502 mg/L

Now we calculate the concentration of compound X in the sample, using the known concentration of standard and the given areas:

2582 * 0.021502 mg/L ÷ 4374 = 0.012693 mg/L

Finally we calculate the concentration of X in the sample prior to dilution:

0.012693 mg/L * 50 mL / 5 mL = 0.12693 mg/L

A scientist wants to display the numbers of gallons of fuel that were used up
in a one-hour period by three different types of motors. What type of visual
display should the scientist use?


Help please

Answers

Answer:

bar graph

Explanation:

List three forms of energy.

Answers

The different types of energy include thermal energy, radiant energy, chemical energy, nuclear energy, electrical energy, motion energy, sound energy, elastic energy and gravitational energy.

you could use any of these.

Answer: Chemical energy is energy stored in the bonds of atoms and molecules. ...

Mechanical energy is energy stored in objects by tension. ...

Nuclear energy is energy stored in the nucleus of an atom—the energy that holds the nucleus together.

Explanation:

Options:
1. Unsaturated fat or saturated fat
2. Fatty acids, carbohydrates, sterols, or phospholipids
3. Fatty acids, carbohydrates, or triglycerides

Answers

Answer:

saturated fats

Explanation:

bcoz it is solid at room temperature and does not have double bonds between carbons

How many milliliters of 0.100 M NaOH is needed to titrate 20.0 mL of 0.100 M HNO3 ?

Answers

Therefore, 50.0 m L of 0.200 M NaOH is required to completely neutralize 100.0 mL of 0.100 M HCl

Which term describes something that displays all the characteristics of life?
a.homeostasis
b.organism
c.stimulus
d.unicellular

Answers

A, it says on here good luckkkkkk

1. What organ system is responsible for controlling all of the body
functions?

Answers

Answer:

The human brain is the body's control center, receiving and sending signals to other organs through the nervous system and through secreted hormones. It is responsible for our thoughts, feelings, memory storage and general perception of the world. The human heart is a responsible for pumping blood throughout our body

What products will form when potassium is added to cold, liquid water?
A.) no reaction will occur
B.) potassium oxohydride and hydrogen
C.) potassium hydroxide and hydrogen
4.) potassium oxide and hydrogen

Answers

Answer:

C

Explanation:

Potassium metal reacts very rapidly with water, which forms Potassium hydroxide (KOH) and hydrogen gas (H2).

Answer:

The answer is C

Explanation:

i took a test on this.

How do you balance: Al+Fe3O4=Al2O3+Fe ?

Answers

Answer:

8Al+3Fe3O4=4Al2O3+9Fe

Answer:

8Al + 3Fe3O4 → 4Al2O3 + 9Fe

Explanation:

The speed of an electron is 1.68*10^8m/s what is the wavelength

Answers

Answer:

[tex]\lambda =4.33x10^{-12}m=4.33pm[/tex]

Explanation:

Hello there!

In this case, since the speed, wavelength and mass of an electron are related via the the Broglie wavelength:

[tex]\lambda =\frac{h}{m*v}[/tex]

Thus, by plugging in the mass of the electron and the Planck's constant, we obtain the following wavelength:

[tex]\lambda =\frac{6.626x10^{-34}J*s}{9.11x10^{-31}kg*1.68x10^{8}m/s}\\\\\lambda =4.33x10^{-12}m=4.33pm[/tex]

Best regards!

all metals rust please answer false or true​

Answers

Answer:

True

Explanation:

All metals do rust but at different rates. Gold, platinum, and silver can rust if but at different rates. It can take time for it to rust, if you clean your metals, it won't rust, it'll take awhile before it rusts if you keep cleaning them.

Hopefully this helps :3 sorry if wrong :( plz mark brainiest if correct :D your bootiful/handsome! Have a great day luv <3

-Bee~


The change in time for the first quarter is
seconds.
The change in time for the second quarte 1.39
seconds.
2.07
The change in time for the third quarter is
2.18
seconds.
The change in time for the fourth quarter is
second

Answers

Answer: The change in time for the first quarter is  1.39 seconds.

The change in time for the second quarter is 0.78 seconds.

The change in time for the third quarter is 0.64 seconds.

The change in time for the fourth quarter is 0.54 seconds.  

Explanation: took info from my data and completed lab

Step 5: Measure the Speed of the Toy Car on the Higher Track

Calculate the change in time for each quarter of the track. Record the change in time in Table E of your Student Guide.

Also added the other calculations -

Calculate the average time the car took to reach each checkpoint. Record the average time in Table D of your Student Guide.

The average time to the first quarter checkpoint is 1.39 seconds.  

The average time to the second quarter checkpoint is 2.18 seconds.

The average time to the third quarter checkpoint is 2.82 seconds.

The average time to the finish line is 3.36 seconds.

Calculate the speed of the car at each checkpoint by dividing the distance between each checkpoint, in meters, by the change in time. Record your answers in Table E of your Student Guide.

The speed at the first quarter checkpoint is 1.09 m/s.  

The speed at the second quarter checkpoint is 1.95 m/s.

The speed at the third quarter checkpoint is 2.37 m/s.

The speed at the finish line is 2.80 m/s.

Please make me Brainly..:)

assuming fixed shape when heated?​

Answers

Answer:

Assuming that the atmospheric pressure is standard, the temperature will rise steadily until it reaches 100°C

Pls someone help me with this question pls

Answers

Answer:

it c

Explanation:

because it's supposed to be untangled so nothing will happen to it because if it's Tangled bad stuff what happened to it and it will broke

what are the reasons that you cannot see many stars in the city nights?

Answers

Answer:

Because of the artificial lights influencing the dark night, turning it into a grey.

If 5.32 mols N2 and 15.8 mols H2 react together, what mass NH3 can be
produced? Which is the limiting reactant?

Answers

Answer:

2.87 gram

N2 is the limiting agent

Explanation:

We will find out if there is sufficient N2 and h2 to produce NH3

a) For 2.36 grams of N2

Molar mass of N2 = 28.02

Number of moles of N2 in 2.36 grams = 2.36/28.02

Mass of NH3 = 17.034 g

Now NH3 produced form 2.36 grams of N2 =  

2.36/28.02 * 2 * 17.034 = 2.87 g NH3

b) For 1.52 g of H2  

NH3 produced = 1.52/2.016 * (2/3) * 17.034 = 8.56

N2 Is not enough to produce 2.87 g of NH3 and also H2 is not enough to make 8.56 g of NH3.  

N2 is the limiting agent as it has smaller product mass

what is bond stability??​

Answers

Answer:

Bond order is a counting method that gives an idea about numbers of electrons shared between atoms. A species with a higher bond order is more stable. A bond order equal to 2 is a double bond, and a bond order of 3 is a triple bond.

Explanation:

What are the benefits of Fluoride?

Answers

Answer:

The benefits of Fluoride are rebuild (remineralize) weakened tooth enamel.slow down the loss of minerals from tooth enamel.reverse early signs of tooth decay.prevent the growth of harmful oral bacteria

Answer:

Fluoride is often called nature's cavity fighter and for good reason. Fluoride, a naturally-occurring mineral, helps prevent cavities in children and adults by making the outer surface of your teeth (enamel) more resistant to the acid attacks that cause tooth decay.

The solubility of a solid in a liquid generally increases with increase temperature.

True
Or
False

Answers

Answer:

False, Solubility increases with temperature for most solids.

Explanation:

Explain how a neutral paper fragment can be attracted to a charged rod

Answers

Answer:

The particles in the neutral paper can shift, causing the paper to become polarized and attracted to the rod.

Explanation:

The neutral paper has an even distribution of its electrons throughout the paper. If a charged rod is brought near the neutral paper, this can cause the electrons in the paper to shift. If the rod is negative, the electrons will be repelled from the rod and cause the molecules in the paper to have a slight positive charge on the part of the paper closest to the rod. If the rod is positive, the electrons will be attracted to the rod and cause a slight negative charge on the side of the paper closest to the rod.

which is the most fluorescent molecule?

Answers

I think neon....................

I need help with level 15 in covalent bonding in playmada collisions app.

Answers

which level are u on now?

Question 7 point
What is the name of the covalent compound with the formula P2N3?

Answers

List of covalent compounds
Binary molecular (covalent) compounds
compound systematic name
NO2 nitrogen dioxide
N2O3 dinitrogen trioxide
N2O4 dinitrogen tetroxide
N2O5 dinitrogen pentoxide

What mass of nitrogen (N2) is needed to produce 0.125 mol of ammonia (NH3)? Input a numerical answer only. N2 + 3H2 ---> 2NH:

Please help me ​

Answers

Given the following equation: I N2(g) + 3H2(g) → _2_NH3(e) a. ... Calculate the number of grams of NH3 produced by the reaction of 5.40 g of ... C. How many grams of nitrogen are needed to produce 15.3 g of NH3?
98 KB

Very sorry if this is wrong!

Help me I'm desperate :( no links or u will be reported

Answers

Answer:

Here is the answer from somewhere in the internet

what role does the grass play in the food web?
A. Producer B. Primary Consumer C. secondary Consumer D. Decomposer​

Answers

Answer:

Producer

Explanation:

I took the test :)

Other Questions
Charlie offers to buy all Hera outstanding common stock for $800 million, believing that Hera is worth $650 million. Delta uses an internal rate of return of 7% on all investment and financing decisions, and plans to issue $700 million in new debt to finance the deal. If Charlie believes the numbers make financial sense, what minimum synergistic benefits must be estimated to exist in this deal? describe one way in which the poster reflects the intellectual ideas of the period 1750-1900. In interval estimation, the t distribution is applicable only whena. the population has a mean of less than 30. b. the sample standard deviation (s) is given instead of the population standard deviation (). c. the variance of the population is known. d. the standard deviation of the population is known.e. we will always use the t distribution. Identify the item that best completes each of the descriptions below. 1. Asset 2. Equity 3. Account 4. Liability 5. Three a. Balance sheet accounts are arranged into. general categories. b. The owner' one gold nugget weighs 0.008 ounces. a second nuggt weighs 0.8 ounces. How many times as much as the first nugget does the second nugget weigh? two spherical objects have equal masses and experience a gravitational force of 85 n towards one another. their centers are 36 mm apart. determine each of their masses. Historically, many countries used to fix their currency to a set amount of ______ gold. Conocer means which of the following in Spanish:Get to Know.Visit.EnjoyTravel to. Read the passage: He attacked an innocent, defenseless child. This is an example of what technique?(A) anaphora(B) aphorism(C) loaded language(D) incorrect premises An n-year annuity-due will pay t at the beginning of year t for t=1,2,...,n (1 for year 1, 4 for year 2, 9 for year 3, etc.). The effective annual rate of interest is fixed at i. (a) Derive a formula for the present value PV(n) of this annuity at time 0 as a function of the term n and the discount factor v = (1 + i) only. [4] Hint: You may use the following equalities: m m-1 m m (t+1)v = [(t+1)v+ + 2[tv + [v 1=0 1=0 1=1 1=0 Note: The formula should NOT include sums or products of the form n n x = x + x + + x or xxxxn j=1 j=1 For example, to express as a function of n and v, the right answer is 1-v not a= [w=1+v+v +...+v-1 9 1-v j=0 (b) Verify the formula of PV(n) in part (a) for n=1 and n=2. (c) Prove the formula of PV (n) in part (a) by mathematical induction on n. Identify whether the following sentences are declarative, interrogative,imperative or exclamatory. Then, write the correct closing punctuation mark ineach of the boxes.exclamotary1. What a terrible crash it was2. Get this book from the stationery shop der3. How beautiful your rose garden is4.Ravi is the best dancer in our class5. Please stop drawing faces on my new book6. When does school reopen after the summer break7. Please turn down the volume of your music system8. Manu loves drawing pictures of all kinds of animals9. This is the cupboard where we keep the chalk and duster10. How many books did you take from the library this week11. Istanbul is the most important and popular city of Turkey How does tracking changes relate to sharing a workbook in Excel? Select an answer: A.You cannot share the workbook if you track changes. B.You must share the workbook to track changes. C.You must track changes to share the workbook. D.You cannot track changes if you share the workbook. briefly explain the differences between f , f-, hfr, and f cells. prairie soils (mollisols) are _______. a. poor in organic matter b. easy to cultivate and fertile c. poor in mineral nutrients d. difficult to cultiva Danamin Sdn.Bhd manufactures all kinds of sugar namely, caster sugar, brown sugar, cane sugar, fruit sugar and confectioners sugar. The manager is considering whether to buy or process one ingredient, material Y. The cost of manufacturing material Y is estimated to be:Direct material RM3,000Direct Labour RM900Variable overhead RM2,000Fixed Overhead RM5,000The material Y can be purchased from an outside supplier for RM8,000.The production of material Y requires 1,000 hours of a special machine which is now fully utilized to mix and process gula melaka. If production of material Y is undertaken, production of processed gula Melaka would be reduced by 5,000 kg resulting in a loss if revenue of RM3,000. The marginal costs of producing 5,000 kg of processed gula Melaka is RM2,000.Required:Should the company make or buy material Y? Show the computations. Which of the following is an idea reflect grit? prove that if A is a square matrix then AA^T and A+A^Tare symmetric A2 A3A4Row Total B_{1} 1226 4268148 B_{2} 14 2844 64 150 B_{3} 18 32 47 72169 Col Total 44 86 133 204 467 P(A_{2}) , or the complement of A, is approximately ) .184 B ) .816 C ) .057 ) .176 2Which best completes this summary of the first paragraph of The Dark Game?In 1861, many did not believe the Civil War would last long; however,Mark this and returnthe first shot was fired on April 12the fighting lasted four yearsover 600,000 soldiers diedFort Sumter was overtaken The battle, sir, is not to the strong alone; it is to the vigilant, the active, the brave. Besides, sir, we have no election. If we were base enough to desire it, it is now too late to retire from the contest. There is no retreat but in submission and slavery! Our chains are forged! Their clanking may be heard on the plains of Boston! The war is inevitableand let it come! I repeat it, sir, let it come.What does Henrys use of exclamatory remarks and repetition reveal about the speaker?A. They emphasize that he is willing to compromise on a solution.B. They explain why he feels that war against the British is necessary. C. They reveal that he has gathered a number of facts to support his argument.D. They show his strong emotional support for going to war against the British.