Answer: phosphoric acid, H3PO4 (gives pop a tart taste)
% O: 1 mol H3PO4 (4 mol O / 1 mol H3PO4) (16 g / 1 mol O) = (64 g O / 98 g H3PO4) x 100 = 65.3%
% P: 1 mol H3PO4 (1 mol P / 1 mol H3PO4) (31 g / 1 mol P) = (31 g P / 98 g H3PO4) x 100 = 31.6%
TACCGACAACACATT
Original DNA sequence
Answer:
ATGGCTGTTGTGTAA
Explanation:
A column is run with hexane first, then a hexane/ dichloromethane mixture, then 100% dichloromethane. What will happen is you mix up the hexane and dichloromethane i.e. ran the dichloromethane first?
If hexane and dichloromethane are being mixed up together i.e if dichloromethane is added first, the impurities will mix together and it will be difficult and unable to separate.
Hexane and dichloromethane are two different solvents with different properties used in column chromatography. While hexane is polar in nature dichloromethane occurs to be a non-polar solvent.
The best way to run this process in the column is to first add hexane, followed by gradual addition of dichloromethane. This will help to separate and distinguish each compound in the mixture.
However, if dichloromethane is added first, the compound will get eluted and there wlll be no separation. The only solution will be to evaporate the solvent and run the column once again with the steps explained above.
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Students in science are studying solutions and the dissolving rate of solids. One group was given some instant lemonade mix to
dissolve. They used a packet of lemonade crystals and a packet of lemonade powder. The students dissolved the same amount of
each solid into 100 ml of water. They varied the water temperature. List ALL the possible conclusions based the data the students
collected?
A)Lemonade crystals are more soluble than lemonade powder
Eliminate
B)The greater the surface area, the powder, the more readily the solid dissolves.
C)As the water temperature increases, the dissolving rate for both solutes
increases
D)Stirring the solution increased the rate dissolving for both crystals and
powder.
E)Lemonade powder dissolved twice as fast as lemonade crystals, regardless of water temperature.
Answer: B and C
Explanation:usatestprep
The solubility of a substance depends on both physical and chemical properties of that substance. Here the greater the surface area, the powder, the more readily the solid dissolves and also increases with the temperature. The correct options are B and C.
The maximum amount of the solute which can dissolve in a known quantity of the solvent at a certain temperature is defined as the solubility. The rate of dissolving depends on the surface area, temperature and the amount of stirring.
The increase in the surface area of the solute and temperature increases the rate of dissolving.
Thus the correct conclusions are B and C.
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When you listen to the voices while in the room, they sound different than listening to them through the wall.
Why do the voices sound different when you listen to them through the wall?
Question 11 options:
Sound waves change frequency over long distances
Sound waves do not pass through solid materials
Your ear processes sound differently when it goes through a solid.
Sound waves travel at different speeds when traveling through different materials
Sound waves travel at different speeds when traveling through different materials because sound has different speeds in different media.
Sound is a type of wave that is propagated in compression and rare factions. When sound is propagated, it produces a sensation when it impinges on the ears.
The speed of sound through various media is different. The difference in the speed of sound in various media results in the fact that sound waves travel at different speeds when traveling through different materials.
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What is the mass number
Answer:
the total number of protons and neutrons in a nucleus.
The mass number, also called atomic mass number or nucleon number, is the total number of protons and neutrons in an atomic nucleus. It is approximately equal to the atomic mass of the atom expressed in atomic mass units.
How many moles are in 1.30 x 10^8 g of HCIO?
Answer:
Explanation:
Find 1 mole of HClO
1*h = 1Cl = 35.5O = 161 mol HClO = 52.5 grams
Set up a proportion
1 mol / 52.5 = x / 1.30 * 10^8 Cross multiply
52.5 * x = 1.30 * 10^8 Divide by 52.5
x = 1.30 * 10^8 / 52.5
x = 2.476 * 10 ^6 moles
What is the potential energy of 25kg rock sitting on the cliff with a height of 230m?
Answer:
57,500 JExplanation:
The potential energy of a body can be found by using the formula
PE = mgh
where
m is the mass
h is the height
g is the acceleration due to gravity which is 10 m/s²
From the question we have
PE = 25 × 10 × 230 = 57,500
We have the final answer as
57,500 JHope this helps you
Calculate [Hg2 2+] in a saturated solution of mercury (I) chloride (Ksp= 1.5x10^-18)
Answer:
2NaI(aq)+Hg2(C2H3O2)2(aq)→2NaC2H3O2(aq)+Hg2I2(s)
Explanation:
(WILL GIVE BRAINIEST)
If you toast a piece of bread then spread butter onto the warm plece of toast, what would be the physical change occurring? What would be the chemical change occurring?
Answer:
I say both I hope this helps
What might an inclined plane be used for?
А
holding objects together
B
splitting an object apart
с
raising and lowering objects
D
moving an object along the ground
Answer:
c. rising and lowering objects
One tablespoon of cookie dough has a mass of 12.99 g
. It is combusted in a calorimeter whose heat capacity is 72.49 kJ/∘C
. The temperature of the calorimeter rises from 21.84 ∘C
to 25.23 ∘C
. Find the food caloric content of the cookie dough in Calories per gram
The calorific value of the tablespoon of cookie dough is 58.7 Calories per gram.
We have the following information from the question;
Mass of the cookie dough = 12.99 g
Heat capacity of the calorimeter = 72.49 kJ/∘C
Temperature rise = 25.23 ∘C - 21.84 ∘C = 3.39∘C
H = 12.99 g × 72.49 × 10^3J/∘C × 3.39∘C
H = 3.19 × 10^6 J or 762.4 Cal
1 g produces 762.4 Cal/ 12.99 g = 58.7 Calories per gram
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What is evidence?
A. A type of package
B. An expert on a topic
C. A claim made by a product
D. Data that support a hypothesis
Answer:
D. Data that support a hypothosis
Explanation:
Evidence needs to support a claim
Answer:
data that support a hypothesis
In an atom, what is the maximum number of electrons that can have a principal quantum number n = 4?
Answer:
32
Explanation:
Principal quantum number=n=4
Maximum number of electrons:-
[tex]\\ \sf\longmapsto 2n^2[/tex]
[tex]\\ \sf\longmapsto 2(4)^2[/tex]
[tex]\\ \sf\longmapsto 2(16)[/tex]
[tex]\\ \sf\longmapsto 32[/tex]
Help please....it is due today...
Help a friend here,,how to describe the lifecycle of a moss plant..
check the image i sent you.
I need help please I
bobbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbb
Complete the sentence.
Atoms form chemical bonds to satisfy the ___________rule and to become _______.
Answer:
Atoms form chemical bonds to satisfy the octet rule and to become stable.
What would be the bond order for He 2 2- molecule
Answer:
In He2 molecule,
Atomic orbitals available for making Molecular Orbitals are 1s from each Helium. And total number of electrons available are 4.
Molecular Orbitals thus formed are:€1s2€*1s2
It means 2 electrons are in bonding molecular orbitals and 2 are in antibonding molecular orbitals .
Bond Order =Electrons in bonding molecular orbitals - electrons in antibonding molecular orbitals /2
Bond Order =Nb-Na/2
Bond Order =2-2/2=0
Since the bond order is zero so that He2 molecule does not exist.
Explanation:
Following embalming an area of skin slip would be
Answer:
dry with some fluid
Explanation:
HELP 100 PONTS GIVING BRAINLIEST
Answer:
Didn’t give me a picture m8???
Answer:
i need pictres to solve
Explanation:
Chemical Formula NH3 Element Element 1 Element 2 Element 3 Color 1 Color 2 Color 3
Answer:
Ammonia | NH3 or H3N | CID 222 - structure, chemical names, physical and chemical ... Ammonia, 0.5M solution in 1,4-dioxane, AcroSeal(R) ... 3.2.2Color/Form.
Explanation:
The chemical formula for ammonia is NH3. It has many names including hydrogen nitride, Nitrosil, and Vaporole. Its molar mass is 17.0306 g/mol[1]. Ammonia has a Page 3 strong pungent odor.
What will happen as these two magnets are pushed closer together?
-------> <---------
n s s n
The magnets will attract each other.
The magnets will lose their magnetis.
The poles on the magnets will change place.
The magnets will push away from each other.
Answer:
The magnets will push away from each other.
A solution is prepared by dissolving 30. g of KNO3 into 100. mL of total solution. What is the molarity of this solution?
Answer:
3.0 M
Explanation:
The molarity formula is M = n/v
where M is the molarity, n is the number of moles, and v is the volume in litres.
step 1: convert the grams of KNo3 to moles. To convert grams to moles, divide by the molar mass.
(30 g divided by 101.103 g/mol) = 0.296 moles
step 2: convert the volumes to Litres. 100 mL is 0.1 L
step 3: apply the formula. Molarity = (0.296 mol / 0.1 L) = 2.96 mol/L
We will round our answer to 3.0 M
please help
Why is there less air pressure at higher altitudes?
Air at higher altitudes is cooler and less turbulent.
Lighter air molecules float above heavier air molecules.
The warmer, lighter air rises, bringing cooler, heavier air to low altitudes.
Air at higher altitudes doesn't have as much air weighing down on it from above.
Answer:
The warmer, lighter air rises, bringing cooler, heavier air to low altitudes.
Air at higher altitudes doesn't have as much air weighing down on it from above.
Explanation:
In short - air pressure is the result of the cumulative force that air molecules act on objects below them due to Earth's gravity. The higher the altitude, the less air molecules there are to act a force below them, and therefore, there's less air pressure at higher altitudes.
Answer:
I believe it's the second option "Lighter air molecules float above heavier air molecules
Explanation:
I believe this because as altitude increases the amount of gas molecules decrease which makes the air less dense
How many total atoms are in the compound Cuso,?
А
3
B
4
с
5
D 6
ОА
OB
Ос
OD
D .
Explanation: Hade the test hope this helpsss
PLS HELP!!!!
A system does 566 kJ of work and loses 216 kJ of heat to the surroundings.
What is the change in internal energy, Δ , of the system? Note that internal energy is symbolized as Δ in some sources.
Answer:
let a real person help u...
The change in internal energy of the system = -772kJ
Explanation:
Heat lost by the system , a = -266KJ
Workdone by the system, W = -506KJ
The first law of thermodynamics states that:
Change in internal energy = q + w
Substituting values into the equation
Change in internal energy = (-266KJ) + (-506KJ)
Change in internal energy = -722KJ
For this molecule: C C CH3 CH3 H3C H3C what would be the expected hybridization, regions of high electron density and bond angle of either central carbon
The bond angle around each central carbon atom is 120°and they are both sp2 hybridized having three regions of electron density.
We can see that the two central carbon atoms have a double bond to each other. A double bonded specie is sp2 hybridized. This implies that the two central carbon atoms are sp2 hybridized.
Also, there are three regions of electron density around each of the two central carbon atoms because each is bonded to three atoms respectively. The bond angle of each central atom is 120°.
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Why do we fill aluminum cans with liquids (soda) then put them in the refrigerator
Answer:
hello hi what's up
Explanation:
ok bye
Answer:
to make it cold
Explanation:
When using acids and bases, note that these substances are Choose... . Make every effort to avoid contact with Choose... . Be sure to wipe up any spills Choose... .
Answer:
When using acids and bases, note that these substances are
corrosive
. Make every effort to avoid contact with
the skin and lab surfaces
. Be sure to wipe up any spills immediately
Explanation:
When using acids and bases, note that these substances are corrosive. Make every effort to avoid contact with the skin and lab surfaces. Be sure to wipe up any spills immediately.
What are acids and bases?An acid is any hydrogen-containing substance that is capable of donating a proton (hydrogen ion) to another substance.
A base is a molecule or ion able to accept a hydrogen ion from an acid.
Acids and bases are corrosive in nature, they give a burning sensation when it comes in contact with skin, so handle this substance with care.
Due to their corrosive nature, Make every effort to avoid contact with the skin and lab surfaces.
Acid spills should be neutralized with sodium bicarbonate and then cleaned up with a paper towel or sponge. Do not use a strong base, such as sodium hydroxide, to neutralize a strong acid like hydrochloric acid.
Acids and bases neutralize each other, forming salt and water. A strong acid-strong base neutralization results in a neutral solution with a pH of 7.
Therefore, When using acids and bases, note that these substances are corrosive. Make every effort to avoid contact with the skin and lab surfaces. Be sure to wipe up any spills immediately.
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Which option is a list of elements arranged by decreasing malleability?
OS, Mg, B
Mg, B, S S
OS, B,
S, B, Mg
OB, Mg, S
BS
Answer:
I think it's the second option
Explanation:
I'm just taking a stab in the dark here, so to speak
