Answer:
Deoxyribose Nucleic Acid
Answer:
The Full form of DNA is Deoxyribonucleic acid. Deoxy means lack of an oxygen atom, Ribo means ribose sugar, Nucleic is found in the nucleus of cell and Acid contains negatively charged phosphate ion which is acidic.
As ice at 0°C changes to water at 0°C, the average kinetic energy of the ice molecules *
remains the same
increases
decreases
Answer:
increases
Explanation:because it cant decrease
Answer:
remains the same
Explanation:
What is the identity of the element whose isotopes you have selected
Answer:
Rubidium
Explanation:
Nil
The identity of the element whose isotopes you have selected is that it significantly possesses the same atomic number but a different mass number.
What is Isotope?The Isotope may be characterized as one of two or more types of atoms of a chemical element that significantly have the same number of protons but with different numbers of neutrons and therefore different atomic masses.
In a more simple sense, an isotope may be defined as an atom that has the same atomic number but different atomic mass and physical properties.
It is the identity of the element that they togetherly possess the same number of protons which leads to identical atomic numbers but due to a distinct number of neutrons, they possess different mass numbers.
Therefore, the identity of the element whose isotopes you have selected is that it significantly possesses the same atomic number but a different mass number.
To learn more about Isotopes, refer to the link:
https://brainly.com/question/160068
#SPJ2
convert 200 grams N to moles
Answer: 14.278880821321199
Explanation:
Answer:
521.12323
Explanation:
1. Chromium metal is reacted with 40.0mL of 3.0M tin (IV) chloride in the following reaction:
4Cr + 3SnCl4 --> 4CrCl3 + 3Sn
How many grams of tin will be produced? (3 marks) Please upload your work.
(Non-anonymous question )
Answer:
14.2 g
Explanation:
40.00 mL = 0.04000 L solution of SnCl4
3.0 M = 3.0 mol/L Molarity of solution of SnCl4
3.0 mol/L * 0.04000 L = 0.12 mol SnCl4
4Cr + 3SnCl4 --> 4CrCl3 + 3Sn
from reaction 3 mol 3 mol
given 0.12 mol x mol
x = 0.12 mol Sn
Molar mass (Sn) =118.71 g/mol
0.12 mol Sn * 118.71 g/mol≈ 14.2 g
How many milliliters of 12.0 M hydrochloric acid contain 3.646 g of HCl (36.46 g/mol)?
Group of answer choices
Answer:
8.3ml of 12M HCl contains 3.646 grams HCl
Explanation:
moles HCl = Molarity X Volume => Volume (Liters) = moles HCl/Molarity
Vol(L) = (3.646g/36.46g/mole)/12M = 0.0083Liter x 1000ml/L = 8.3ml
a. Which date shows a waning crescent?
Answer:
Warning means that it is getting smaller while crescent refers to the crurved shape simular to a banana or a boat. The warning crescent moon rises after midnight and is still up and visible in the morning and day sky before itsets in the afternoon.
Explanation:
3. What are the two types of mechanical waves?...
Answer:
longitudinal waves and transverse waves.
Explanation:
Mechanical Waves are waves which propagate through a material medium (solid, liquid, or gas) at a wave speed which depends on the elastic and inertial properties of that medium. There are two basic types of wave motion for mechanical waves: longitudinal waves and transverse waves.
The two types of mechanical waves are transverse waves and longitudinal waves.
How to explain them
Transverse waves are characterized by oscillations perpendicular to the direction of wave propagation. In this type of wave, the particles of the medium move in a direction perpendicular to the wave's motion. Examples of transverse waves include electromagnetic waves like light and radio waves, as well as waves on a string or water waves.
Longitudinal waves, on the other hand, have oscillations parallel to the direction of wave propagation. In these waves, the particles of the medium move in the same direction as the wave. Sound waves are a common example of longitudinal waves, as well as seismic waves.
Read more about mechanical waves here:
https://brainly.com/question/26116832
#SPJ6
How do you think rocks form?
Answer:
Through gradual accumulation of sediments
Explanation:
In a neutralization reaction with a strong acid or base, all of the hydrogens from the acid and the hydroxides from the base react to form water.
Balance the following neutralization reaction:
H3PO4 (aq) + NaOH (aq) â H2O (l) + Na3PO4 (aq)
Enter the appropriate coefficient to the left of the respective term. In the event that your coefficient would be "1" be sure to write "1" as opposed to leaving it blank.
Answer:
H3PO4 + 3NaOH ----> Na3PO4 + 3H2O
Explanation:
The balanced equation is given below
H3PO4 + 3NaOH ----> Na3PO4 + 3H2O
Answer:
[tex]H_3PO_4 (aq) + 3NaOH (aq) \rightarrow 3H_2O (l) + Na_3PO_4 (aq)[/tex]
Explanation:
Hello,
In this case, for the given reaction:
[tex]H_3PO_4 (aq) + NaOH (aq) \rightarrow H_2O (l) + Na_3PO_4 (aq)[/tex]
We must assure the law of conservation of mass is respected, so we equal the number of atoms at each side of the equation by adding the stoichiometric coefficients to the left of each compound as shown below:
[tex]H_3PO_4 (aq) + 3NaOH (aq) \rightarrow 3H_2O (l) + Na_3PO_4 (aq)[/tex]
So the coefficients are 1, 3, 3 and 1 respectively for each species in the chemical reaction.
Regards.
A sample of sugar (C12H22O11) contains
1.505 × 1023 molecules of sugar. How many moles of sugar are present in the sample? Answer without doing any calculations.
0.25 mol
0.50 mol
1.00 mol
2.50 mol
Answer:
0.25 mol
Explanation:
Use the formula n=N/NA
n= number of mols
N = number of particles
Nᵃ = Avogadros constant = 6.02 x [tex]\\10^{23[/tex]
So, n= [tex]\frac{1.505 X 10^{23} }{6.02 X 10^{23}}[/tex]
The 10 to the power of 23 cancels out and you are left with 1.505/6.02, which is approximately 1/4. This is the same as 0.25 mol.
Hope this helped :)
Calculate the value deltaG°
Answer:
ΔG=ΔG0+RTlnQ where Q is the ratio of concentrations (or activities) of the products divided by the reactants. Under standard conditions Q=1 and ΔG=ΔG0 . Under equilibrium conditions, Q=K and ΔG=0 so ΔG0=−RTlnK . Then calculate the ΔH and ΔS for the reaction and the rest of the procedure is unchanged.
Explanation:
A compass needle normally points toward Earth’s magnetic pole, which is near the North Pole. Which best explains why the needle moves away from the pole when it comes close to a current-carrying wire? -Current within the wire weakens the magnetic force of the pole. -Magnetism surrounding the wire weakens the magnetic force of the pole. -Magnetism surrounding the wire draws the needle toward the wire.
Answer:
Magnetism surrounding the wire draws the needle toward the wire.
Explanation:
Magnetism is a force which is responsible for the attraction and repulsion of objects. Magnetism is also generated around the wire in which current is flowing. This magnetism is stronger when more current flows through the wire. This magnetism is stronger than the magnetism of the poles so when the compass brought near to the electric wire, the needle moves toward the wire.
Answer:
D. -Magnetism surrounding the wire draws the needle toward the wire.
Explanation:
amning At Home -Chemisu
Use the specific heat values to answer the
following questions.
Cp (J/g•°C)
4.18
Which of the following has the smallest heat
capacity?
2.03
2.08
0.450
RETRY
Substance
H2O(1)
H2O(s)
H2O(g)
Fe(s)
Al(s)
Cu(s)
Sn(s)
Pb(s)
Au(s)
Hg(1)
0.897
0.385
0.227
0.129
0.129
0.140
Intro
Answer:first one: 3.0g second one: 10g H2O(I)
Explanation:
Answer:
First blank: 3.0 g Pb
Second Blank: 10g [tex]H_{2} O[/tex](l)
Explanation:
Edge '21
Which kind of bond occurs when two atoms share an electron
Answer:
Covalent bondExplanation:
consider the balanced chemical equation below. when the chemical reaction was carried out calculated theoretical was yield for sodium bromide 162 grams but the measured yield was 150 grams what is the percent yield?
Answer:
Explanation:
% yield = (actual yield / theoretical yield) X 100
For this question,
% yield = (150g/ 162 g) X 100 = 92.6%
Answer:
92.6%
Explanation:
I need help with this i'm really dumb.
Balance
p4+o2 ----> p4o10
Answer:
P4 + 5O2 → P4O10
Explanation:
White Phosphorus - P4
Dioxygen - O2
Tetraphosphorus Decaoxide - P4O10
But volcanoes are not all bad. Can you assess the value of volcanoes for the Earth? Why are they necessary and what good do they do?
Answer:
yes
Explanation:
volcanoes have done wonderful things for the earth
They help cool off the earth removing heat from its interiorvolcanic emissions have produced the atmosphere and the water of the oceansvolcanoes make islands and add to the continentvolcanoes are necessary because:
fertile is another advantage of volcanic activity."In places like Japan,Indonesia,Philippines,Hawaii,volcanic material mixed in with the soil provides a lot of important nutrients
What is the oxidation state of nitrogen in N2?
O A. +5
O B.-3
O C. +3
O D.O
Answer:
D) 0 (zero)
Explanation:
There's a rule that neutral compounds (compound) without charges have oxidation of zero. Also, another formula that if two atoms of the same element make one single molecules such as diatomics molecules are O2, N2, I2, Br2 oxidation states are zero, thus here N is 0 (Zero) as well.
Which of these was not proposed by john dalton in 1805?
A. All matter is made of atoms.
B. Adams are made of protons, neutrons and electrons.
C. During chemical reactions, atoms rearrange themselves.
D. The atoms of a particular element are all identical.
Answer:
Atoms are made of protons, neutrons and electrons.
Explanation:
The Dalton's atomic theory was an early attempt at describing the properties of atoms. It stipulated that atoms were the smallest indivisible particle of a substance. Chemical reactions occur as a result of a combination or separation of atoms. Atoms of the same element are exactly alike and differ from atoms of other elements. Atoms can neither be created nor destroyed.
As time went on, modern scientific evidence began to modify the original postulates of the Dalton's atomic theory. It was not postulated in 1805 that atoms were composed of subatomic particles; electrons, neutrons and protons. Dalton's theory held the atom to be 'indivisible'. However in 1897, JJ Thompson discovered the electron. Subsequently, the proton and neutrons were discovered. This shows that the atom in itself consisted of even smaller particles.
What is the total pressure in a 2.00 L container that holds 1.00g He, 14.0g CO, and 10.0g of NO at 27 degree?
Answer:
13.3 atm(assuming the temperature given is in Celsius)
Explanation:
First, the moles of each gas must be found. .25 mol He, .50 mol CO, .33 mol NO. Next, each set of mols must be plugged into the ideal gas law, PV=nRT, for each gas. Move it around so you get the pressure P=nRT/V. When you calculate everything, you should get 3.08atm He, 6.15atm CO, and 4.06atm NO. Add these together and you get the pressure of the container.
A metal, M , of atomic mass 56 amu reacts with chlorine to form a salt that can be represented as MClx. A boiling point elevation experiment is performed to determine the subscript , and therefore, the formula of the salt. A 30.2 g sample of the salt is dissolved in 100.0 g of water and the boiling point of the solution is found to be 376.81 K. Find the formula of the salt. Assume complete dissociation of the salt in solution.
CAN SOMEONE PLEASE HELP ME!!! I AM VERY CONFUSED AND ITS DUE TODAY BEFORE 11:55 THANK YOU IN ADVANCED
Answer:
MCl₂
Explanation:
The formula for boiling point elevation can be used to find x. The "complete dissociation" means there will be an ion of M and x ions of Cl in the solution. The number of moles of solute will be 30.2 grams divided by the molecular weight of MClx, where x is the variable we're trying to find.
[tex]\Delta T=imK_b\qquad\text{where i=ions/mole, m=molality, $K_b\approx 0.512$}\\\\376.81-373.15=(x+1)\dfrac{\text{moles}}{\text{kg solvent}}(0.512)\\\\\dfrac{3.66}{0.512}=(x+1)\dfrac{\dfrac{30.2}{56+35.45x}}{0.1}=\dfrac{302(x+1)}{56+35.45x}\\\\\dfrac{3.66}{0.512\cdot 302}(56+35.45x)=x+1\\\\\dfrac{3.66\cdot 56}{0.512\cdot 302}-1=x\left(1-\dfrac{3.66\cdot 35.45}{0.512\cdot 302}\right)\\\\x=\dfrac{50.336}{24.877}\approx 2.023[/tex]
Then the formula for the salt is MCl₂.
In what way are Paul Robeson and Sonia Sotomayor alike?
A. All the above
B They both started ethnic studies programs in their hometowns .
C. They are both people of color who were the first to do something in their fields.
D. They are both Hispanic.
Answer:
C is the answer.
Explanation:
They are both people of color who were the first to do something in their fields
What disease is spread through warm climates ?
Answer:
malaria
Explanation:
By means of a schematic diagram show how a bacteria cell applied to the region of a cowpea root can end up becoming a nitrate ion which can be absorbed by a subsequent crop
Answer:
Nitrifying Bacteria are a group of aerobic bacteria important in the nitrogen cycle as converters of soil ammonia to nitrates, compounds usable by plants. An example is nitrosomonas or nitrobacter and species in that family.
The schematic diagram is attached below, which summarises the oxidation of ammonia or free nitrogen in the soil to nitrates for the cowpea plant's utilisation.
pH and pOH Formulas
Concentration Formulas
pH = -log[H30)
[H30*) = 10-PH
pOH = -log(OH)
[OH] = 10-POH
pH + POH = 14.00
[H3O+][0] = 1.0 10-14
What is the hydronium (H30*) concentration of a solution with a pH of 3.60?
A 2.5 x 10^M
B 3.0 x 10-M
C 4.0 x 10M
D.
45* 10-11M
Answer:
A. 2.5 x 10^M
Explanation:
H+=10^-pH
- Hope that helps! Please let me know if you need further explanation.
Answer:
A. 2.5 x 10^M
Explanation:
i took the test and i got it correct (edmentum)
Hydrogen gas at a temperature of 22.0°C that is confined in a 5.00L cylinder exerts a pressure of 4.20atm. If the gas is released into a 10.0L reaction vessel at a temperature of 33.6°C, what will be the pressure inside the reaction vessel?
Answer:
THE NEW PRESSURE WHEN THE GAS IS RELEASED INTO A 10 L REACTION VESSEL AND AT 33.6 °C TEMPERATURE IS 2.18 atm.
Explanation:
The general gas equation will be used to calculate the new pressure.
P1V1 /T1 = P2 V2 / T2
P1 = 4.20 atm
V1 = 5 L = 5 dm3
T1 = 22°C = 22 + 273 K = 295 K
V2 = 10 L = 10 dm3
T2 = 33.6 °C = 33.6 + 273 K = 306.6 K
P2 =?
Rearranging the formula and making P2 the subject of the equation, we have;
P2 = P1V1 T2 / T1 V2
P2 = 4.2 * 5 * 306.6 / 295 * 10
P2 = 6438.6 / 2950
P2 = 2.18 atm.
So therefore, the pressure inside the reaction vessel when the gas is released into a 10 L reaction vessel and at a temperature of 33.6 °C is 2.18 atm.
Answer:
The pressure inside the reaction vessel is 2.18 atm
Explanation:
Step 1: Data given
The temperature = 22.0 °C = 295.15 K
Pressure = 4.20 atm
Volume = 5.0 L
Volume increased to 10.0 L
Temperature increased to 33.6 °C = 306.75K
Step 2: Calculate the new pressure
P1 * V1 / T1 = P2*V2 / T2
⇒with P1 = the initial pressure = 4.20 atm
⇒with V1 = the initial volume = 5.0 L
⇒with T1 = the initial temperature = 295.15 K
⇒with P2 = the new pressure = TO BE DETERMINED
⇒with V2 = the increased volume = 10.0L
⇒with T2 = the increased temperature = 306.75 K
(4.20 atm * 5.0 L) / 295.15 K = ( P2 * 10.0 L ) / 306.75 K
P2 = (4.20 * 5.0 L * 306.75 K) / (295.15 K * 10.0 L)
P2 = 2.18 atm
The pressure inside the reaction vessel is 2.18 atm
A proton transfer reaction can occur when an aldehyde is placed in strong base, such as an alkoxide ion, producing an alcohol and a charged conjugate base that is resonance stabilized. In the left box, draw the curved arrows for the proton transfer. In the middle and right boxes, draw the two structures for the resonance-stabilized product as noted in the box-specific directions. Be sure to include all lone pairs and nonzero formal charges.
Hi, you have not provided structure of the aldehyde and alkoxide ion.
Therefore i'll show a mechanism corresponding to the proton transfer by considering a simple example.
Explanation: For an example, let's consider that proton transfer is taking place between a simple aldehyde e.g. acetaldehyde and a simple alkoxide base e.g. methoxide.
The hydrogen atom attached to the carbon atom adjacent to aldehyde group are most acidic. Hence they are removed by alkoxide preferably.
After removal of proton from aldehyde, a carbanion is generated. As it is a conjugated carbanion therefore the negative charge on carbon atom can conjugate through the carbonyl group to form an enolate which is another canonical form of the carbanion.
All the structures are shown below.
a. Use the following data to calculate the enthalpy of hydration for calcium chloride and calcium iodide.
Lattice Energy* ΔHsoln
CaCl_2(s) -2247 kJ/mol -46 kJ/mol
CaI_2(s) -2059 kJ/mol -104 kJ/mol
*Lattice energy is defined as the energy change for the process M^+(g) + X^-(g) -------> MX(s).
b. Based on your answers to part a, which ion, Cl^- or I^-, is more strongly attracted to water?
O Chloride
O Iodide
Answer:
A. Enthalpy of hydration of CaCl2 = -2293 KJ/mol
Enthalpy of hydration of CaI2 = -2163 KJ/mol
B. Chloride ions
Explanation:
Enthalpy of hydration is the energy required to convert one mole of gaseous ions to aqueousions.
Enthalpy of hydration = Enthalpy of solution - lattice energy
For CaCl2;
Enthalpy of hydration = -46 - 2247 = -2293 KJ/mol
For CaI2;
Enthalpy of hydration = -104 - 2059 = -2163 KJ/mol
B. Since the enthalpy of hydration of CaCl2 is more negative than that of CaI2, it means that chloride ions are more easily attracted to water molecules. This we conclude because the difference in enthalpy values are due to the negative ions as the two compounds share a common positive calcium ion.
The enthalpy for hydration of calcium chloride is -2293 kJ/mol. The enthalpy for the hydration of calcium iodide is -2163 kJ/mol. The chloride ion Cl^- is more strongly attracted to water than iodide.
The enthalpy of hydration also the enthalpy of solvation is the quantity of energy released when 1 mole of gaseous ion is diluted.
It can be expressed by using the formula:
[tex]\mathbf{\Delta H_{hyd} = \Delta H_{solution} + \Delta H_{LE}}[/tex]
The enthalpy for hydration of calcium chloride can be expressed as:
[tex]\mathbf{\Delta H_{hyd(cacl_2)} = \Delta H_{solution(caci_2)} + \Delta H_{LE(caci_2)}}[/tex]
[tex]\mathbf{\Delta H_{hyd(cacl_2)} = -46 \ kJ/mol +-2247 \ kJ/mol}[/tex]
[tex]\mathbf{\Delta H_{hyd(cacl_2)} =-2293 \ kJ/mol}[/tex]
The enthalpy for the hydration of calcium iodide can be expressed as:
[tex]\mathbf{\Delta H_{hyd(cal_2)} = \Delta H_{solution(caI_2)} + \Delta H_{LE(caI_2)}}[/tex]
[tex]\mathbf{\Delta H_{hyd(cacl_2)} = -104 \ kJ/mol +-2059 \ kJ/mol}[/tex]
[tex]\mathbf{\Delta H_{hyd(cacl_2)} =-2163 \ kJ/mol}[/tex]
From the above calculation, we can see that the enthalpy of hydration of calcium chloride is greater than that of calcium iodide,
Therefore, we can conclude that the chloride ion Cl^- is more strongly attracted to water than iodide.
Learn more about enthalpy of hydration here:
https://brainly.com/question/25723103?referrer=searchResults
which compound is an electrolyte ? 1) butene 2) propane
Answer:
1.)
Explanation:
A scientist places a strip of hot metal on top of a block of another metal with a lower
melting point. The second metal quickly melts. What is the main type of heat transfer
responsible?
The heat transfer that we'll have will be:
- At first, the metal bar will emanate heat through radiation, to the atmosphere, and to the second metal, through conduction.
- Because of this, the second bar will start to increase it's temperature, up to the fusion point, spending the energy received on the fusion, and also radiating heat to the atmosphere. It won't emit heat in any other form, since heat transmission can happen only from a hot body to a cooler one, and the only things in contact are the two bars.
Answer:
conduction
Explanation:
they are in direct contact