Answer 2. Accept with minor revisions: Also known as conditional acceptance, this decision means that the paper requires minor changes for it to be ...
wer:
Explanation:
How many moles of KBr will be produced from 7 moles of BaBr2?
BaBr2 + K2SO4 --> 2 KBr + BaSO4
1 mole KBr
7 moles KBr
3.5 moles KBr
14 moles KBr
1 mol BaBR2 produces 2mol KBr .
7 mol s of BaBr_2 produces:-
7(2)14mol KBrOption D is correct
In a typical mammalian cell, the net transport by the sodium-potassium exchange pump that maintains the 70 mv membrane potential is 500 singly charged ions per second.
For a typical mammalian cell, the net transport by the sodium-potassium exchange pump, Work done is mathematically given as
W= 5.6*10-18 J
How much work does the pump do each second?Generally, the equation for the Potential difference is mathematically given as
Potential difference = Work done / Charge
Therefore
W=q*P.d
Q= 500 * 1.6*10-19 C
P.d. = 70 mV
In conclusion,Workdone
W500 * 1.6*10-19 * 70*10-3
W= 5.6*10-18 J
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A ____________ is required to transfer dna sequences from one organism to another.
genomic library
genetic probe
vector
restriction endonuclease
reporter gene
How many moles of sulfur are in 53.7 grams of sulfur?
Answer:
1.67 moles (find this by dividing 53.7 by the gram formula mass of sulfur, which is about 32.1)
Grace runs 6 miles in 2 hours. What is her speed?
Which statement below describes the location of nonmetals on the periodic table?
Answer:
Nonmetals are located on the upper right side of the Periodic table (see above image). Exception: Hydrogen is a nonmetal which is located on the left top corner of the Periodic table. Well, you have got the answer of “Where are Nonmetals located on the Periodic Table?”
Explanation:
2) The coregion in the area of the Texas Panhandle. This coregion is level plates that ranges in elevation from 3000 to 4500. This is very fry dry and
the characteristics of this coon we would expect to see plenty of
A) wind ersoin
B) water ersoin
C) deposition of sediment
Answer:
the correct answer is B po sure po ako
Explanation:
Sure na sure po
Answer:
The map shows the various ecoregions of Texas. Which ecoregion is most vulnerable to wind erosion from hurricanes originating in the Gulf of Mexico? desert. A.
Explanation:
how many grams is 1.25 moles of NaCl
Molar mass of NaCl:-
23+35.558.5g/molNow
Mass=Molar mass ×MolesMass=125(58.5)Mass=7312.5gLa cantidad de corriente se expresa en...
A. Ohmios.
B. Voltios.
C. Amperios.
Answer:
C
Explanation:
Amps measure the flow of Electrons
Answer:
C
Explanation:
is c
NEED HELP ASAP!!! WILL MARK BRAINLIEST!!! A scuba tank can hold 18 L of air 6 atm of pressure. If the gas were to be released all underwater at 4 atm, it would take up how much volume assuming that the temperature remained constant?
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If temperature remains constant, then we can apply the formula :
[tex]\qquad \tt \dashrightarrow \:p_1v_1 = p_2v_2[/tex]
[tex]\qquad \tt \dashrightarrow \:4 \times v_1 = 6 \times 18[/tex]
[tex]\qquad \tt \dashrightarrow \: v_1 = 108 \div 4[/tex]
[tex]\qquad \tt \dashrightarrow \:v_1 = 27[/tex]
So, the required volume is 27 litres
What makes an acid a strong acid in water makes a base or weak base
Acids or bases with strong bonds remain as molecules in solutions known as weak acids or bases. The acids or bases with weak bonds easily dissociate into ions and are called strong acids or bases.
What is acid or base?Acid is proton donor hydrogen containing substance. Base is proton acceptor molecule.
It can be predicted by pH indicator. pH with value less than 7 indicate acidity and value with more than 7 denotes base, and the one with value 7 is considered as neutral.
Thus, based on bond strength and its dissociation in the water makes it strong acid or weak base.
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Calculate the mass of sample of calcium carbonate containing 5.5 x 10^23 atoms
A. 18.29 g
B. 91.44 g
C. 6.02 x 10^23g
D. not enough information
which one is it?? thank you
No of moles:-
No of molecules/Avagadro no5.5×10²³÷6.022×10²³0.91molNow
molar mass:-
CaCO_340+12+48100g/molMass:-
100(0.91)91gOption B
Each of the colored lines in hydrogen's emission spectrum corresponds with the
A) energy released by the electrons as they orbit the nucleus.
B) the ionization energy of the electron when forming chemical bonds.
C) transition of an electron from a higher energy level to a lower energy level.
D) transition of an electron from a lower energy level to a higher energy level
when excited.
Each of the colored lines in hydrogen's emission spectrum corresponds with the C. transition of an electron from a higher energy level to a lower energy level.
What is an emission spectrum?An emission spectrum can be defined as the range of wavelengths, frequencies or pattern of bright lines which can be seen when the electromagnetic radiation that are emitted by an atom of a chemical compound (substance) moves through a spectrometer.
Generally, this process leads to the quantization or transfer of an electron from one energy level to another such as the transition of an electron from a energy level of higher magnitude to a lower energy level in hydrogen's emission spectrum.
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What is the pH of a solution that has a poH of 1.8?
Answer:
Ok so To calculate the pH of an aqueous solution you need to know the concentration of the hydronium ion in moles per liter (molarity). The pH is then calculated using the expression:
pH = - log [H3O+].
Example: Find the pH of a 0.0025 M HCl solution. The HCl is a strong acid and is 100% ionized in water. The hydronium ion concentration is 0.0025 M. Thus:
pH = - log (0.0025) = - ( - 2.60) = 2.60
Explanation:
The hydronium ion concentration can be found from the pH by the reverse of the mathematical operation employed to find the pH.
[H3O+] = 10-pH or [H3O+] = antilog (- pH)
Example: What is the hydronium ion concentration in a solution that has a pH of 8.34?
8.34 = - log [H3O+]
- 8.34 = log [H3O+]
[H3O+] = 10-8.34 = 4.57 x 10-9 M
On a calculator, calculate 10-8.34, or "inverse" log ( - 8.34).
a sample of helium gas has a volume of 200.0 mL at 730mm Hg pressure. What pressure, in atm is needed to reduce the volume at a constant temperature to 50.0 mL
Explanation:
The question had been explained.
Proteins are biological polymers made of ?
Answer:
amino acids
Explanation:
Proteins are polymers made from different monomers, called amino acids.
Hope this helps.
6. Cu + FeSO4
single replacement
Answer:
CuSO4 + Fe
Explanation:
this is because Cu will displace Fe from it's position
A sample of gas has a volume of 8.20 L at 0.750 atm and 375 K. What volume (in L) does the gas occupy at 817 torr and 325 K?
The new volume occupied by the sample of gas is 4.96L.
Given the data in the question;
Initila pressure; [tex]P_1 = 0.750atm[/tex]Final pressure; [tex]P_2 = 817torr = 1.075atm[/tex]Inital temperature; [tex]T_1 = 375K[/tex]Final temperature; [tex]T_2 = 325K[/tex]Initial Volume; [tex]V_1 = 8.20L[/tex]Final Volume; [tex]V_2 = \ ?[/tex]
Combined gas lawCombined gas law put together both Boyle's Law, Charles's Law, and Gay-Lussac's Law. It states that the ratio of the product of volume and pressure and the absolute temperature of a gas is equal to a constant.
It is expressed as;
[tex]\frac{P_1V_1}{T_1} = \frac{P_2V_2}{T_2}[/tex]
To calculate the new volume the gas occupy, we subtsitute our given values into the expression above.
[tex]\frac{P_1V_1}{T_1} = \frac{P_2V_2}{T_2}\\ \\ P_1V_1T_2 = P_2V_2T_1\\\\0.750atm * 8.20L * 325K = 1.075atm * V_2 * 375K\\\\1998.75LatmK = 403.125atmK * V_2\\\\V_2 = \frac{1998.75LatmK}{403.125atmK} \\\\V_2 = 4.96L[/tex]
Therefore, the new volume occupied by the sample of gas is 4.96L.
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How can you get a real gas to behave like the LEAST like an ideal gas (minimize attraction between particles)?
A real gas behaves least like an ideal gas under the conditions of low temperature and high pressure.
This is because at low temperature and high pressure molecules of gas will have negligible kinetic energy and strong force of attraction. Thus, real gas will not behave like an ideal gas.
Whereas at high temperature and low pressure a real gas will behave like an ideal gas.
Answer: No real gas is ideal. All molecules have a volume and intermolecular forces of attraction. So a "real molar volume" is different from an ideal molar volume.
Explanation: I hope this help
Please answer my question I really need it now
Answer:
1 Li , Na, K, Rb, Cs
2 Co, V , Cr, Mn, Fe
3 Po, Te, Se, S, O
a gas that has a pressure of 7.5 atm and a volume of 20L what would be the new volume if the pressure was changed to 3.5 atm
Answer: 43 L
Explanation:
50. g of NaNO3 was dissolved in 1250 mL of water.
What is the molality of the solution? (Molar mass of
NaNO3 = 85 g/mol; Density of water = 1.00 g/mol)
m.
Your answer should be rounded to two significant figures. Do not
include units in your answer.
Answer:
.47
Explanation:
I just took a test that asked this exact same question and I got it right.
What is the pressure in a 8.00 L tank with 50.5 grams of chlorine gas at 365 K?
The pressure in a 8.00 L tank with 50.5 grams of chlorine gas at 365 K is 2.67atm.
How to calculate pressure?The pressure of a given mass of gas can be calculated using the following formula:
PV = nRT
Where;
P = pressureV = volumeT = temperaturen = no of molesR = gas law constantThe number of moles in 50.5g of Chlorine gas is as follows:
moles = 50.5/70.91
moles = 0.71mol
P × 8 = 0.71 × 0.0821 × 365
8P = 21..34
P = 21.34/8
P = 2.67atm
Therefore, the pressure in a 8.00 L tank with 50.5 grams of chlorine gas at 365 K is 2.67atm.
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during lanslides rock and soil are?
Answer:
Getting carried down a moutain side or a cliff and they are relocated.
Explanation:
Glaciers are responsible for moving rocks from one place to another
Part G
Explain how the structure of ammonium lauryl sulfate, as described in parts E and F, produces the properties identified in part C. Write a short paragraph or two.
The molecule ammonium lauryl sulfate is a detergent because of its hydrophobic tail and a hydrophilic head which are responsible for its cleansing action.
Properties of ammonium lauryl sulfateThough not shown, I presume that the property labelled as C must have to do with the cleasing action of the molecule ammonium lauryl sulfate.
The substance has a hydrophobic tail and a hydrophilic head which enables it to form miscles and these are the responsible for the cleansing action of the ammonium lauryl sulfate molecule.
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Gold can be found in native or pure state in nature why? Write any one anyone application of sulphur
Answer:
Sulphur is used in making car batteries and fertlizers
Answer:
Gold is almost found in its pure state. Because gold does not react with other elements or compounds easily. Elemental sulfur is used in black gunpowder, matches, and fireworks; in the vulcanization of rubber; as a fungicide, insecticide, and fumigant; in the manufacture of phosphate fertilizers; and in the treatment of certain skin diseases. The principal use of sulfur, however, is in the preparation of its compounds.
After some wood has completely burned in a fire some of the matter that made up the wood has been destroyed
Answer:
Because it went through a chemical change which changes its atomic form
What is the pressure in atm of a 5. 00 l tank with 2. 50 moles of oxygen
at 39. 3 °c?
1
4
7
Answer:
1
Explanation:
Examine each of the following pie charts. Which one shows the correct makeup of Earth's atmosphere?
A
A
B
B
C
C
D
D
Answer:
Answer A
Explanation:
atmosphere is made up of approx 78% N and 21% O2
What is Solution Concentration with examples
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Solution Concentration or the concentration of the solution.The amount of solute dissolved in a particular amount of the solvent is a crucial parameter and is called Solution ConcentrationEXAMPLE →if you add one teaspoon to two cups of water, the concentration could be reported as 1 t salt per 2 c water.[tex]\purple{\rule{15mm}{2.9pt}} \red{\rule18mm{2.5pt}} \orange{ \rule18mm{2.5pt}}[/tex]
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