Answer:
B. Creating synthetic insulin
Explanation:
In medicine, genetic engineering has been used to mass-produce insulin, human growth hormones, Follistim (for treating infertility), human albumin, monoclonal antibodies, antihemophilic factors, vaccines, and many other drugs. In research, organisms are genetically engineered to discover the functions of certain genes.
Please help me with the following question below:
Molarity as Stoikiometri
Level : SHSEquatuions od Molarity :
M = m/Mr × 1000/V
Mr Lithium Dichromate (Li2CrO4)
= Ar Li (2) + Ar Cr + Ar O (4)
= 7 (2) + 52 + 16 (4)
= 14 + 52 + 64
= 130 g/mol
Molarity
= m/Mr × 1000/V
= 19.5 g/130 g/mol × 1000/95 mL
= 0.15 mol × 10.53 /L
= 1.5795 mol/L
So, the molarity of the solution is 1.5795 mol/L
#LearnWithEXO
Katie looks out her bedroom window on a clear night. The stars in the sky look like tiny points of light.
Katie knows that the Sun is also a star, but it looks much larger than all of the other stars in the sky.
Why do the stars in the night sky look so much smaller than the Sun?
Answer:
The Sun looks bigger than other stars because its more closer to the earth than the stars.the farther anything is distant from us the tinier it will look
Explanation:
plz mark brainliest if thats ok|?
What is the difference between a theory and a scientific law?
Think of it like theory and physics.
A theory is an idea that needs to be tested.
Scientific law is something that cant be proven wrong.
Question 5 of 5
Which idea was not supported by Dalton's atomic model but was supported in
all later atomic models?
A. A central, positive nucleus
B. Electrons in orbits
C. Positive and negative parts
D. Electron clouds
Answer:
It’s A
The indivisibility of an atom was proved wrong: an atom can be further subdivided into protons, neutrons and electrons. However an atom is the smallest particle that takes part in chemical reactions. According to Dalton, the atoms of same element are similar in all respects.
Please help me!! I will literally pay you if you do my one aleks topic due tomorrow!! I have multiple example problems. It’s same Q different numbers
Answer:
I'll do it if you give brainlyest and some points
MARKING BRAINLIEST! HURRY!!
Read the following list of objects:
a flying insect, a stretched elastic band, a falling stone, a flowing river, a coiled spring
Which of the objects have only potential energy?
A flying insect, a coiled spring
A stretched elastic band, a coiled spring
A falling stone, a flying insect
A flowing river, a flying insect
Answer:
a coiled spring
Explanation:
The mass of 2.50 moles of calcium fluoride (CaF2) is how many
grams.
Answer:
195.199 grams
defintion for concentration
Answer:
concentration is the abundance of a constituent divided by the total volume of a mixture.
Explanation:
hope this helps <33
have a good afternoon:)
and also can i have brainliest plz? :D
Which properties cause chemical reactions?
chemical properties
chemical and physical properties
physical properties
neither chemical nor physical properties
Answer:
Chemical Properties
Explanation:
Answer: chemical properties
Explanation: chemical bonds between atoms are formed or broken.
How many grams of O2 are present in 44.1 L of O2 at STP?
a.10.0 g
b.16.0 g
c.32.0 g
d.410.0 g
e. 63.0 g
Taking into accoun the STP conditions and the ideal gas law, the correct answer is option e. 63 grams of O₂ are present in 44.1 L of O2 at STP.
First of all, the STP conditions refer to the standard temperature and pressure, where the values used are: pressure at 1 atmosphere and temperature at 0°C. These values are reference values for gases.
On the other side, the pressure, P, the temperature, T, and the volume, V, of an ideal gas, are related by a simple formula called the ideal gas law:
P×V = n×R×T
where:
P is the gas pressure.V is the volume that occupies.T is its temperature.R is the ideal gas constant. The universal constant of ideal gases R has the same value for all gaseous substances.n is the number of moles of the gas.Then, in this case:
P= 1 atmV= 44.1 Ln= ?R= 0.082 [tex]\frac{atmL}{molK}[/tex]T= 0°C =273 KReplacing in the expression for the ideal gas law:
1 atm× 44.1 L= n× 0.082 [tex]\frac{atmL}{molK}[/tex]× 273 K
Solving:
[tex]n=\frac{1 atm x44.1 L}{0.082\frac{atmL}{molK}x273K}[/tex]
n=1.97 moles
Being the molar mass of O₂, that is, the mass of one mole of the compound, 32 g/mole, the amount of mass that 1.97 moles contains can be calculated as:
[tex]1.97 molesx\frac{32 g}{1 mole}[/tex]= 63.04 g ≈ 63 g
Finally, the correct answer is option e. 63 grams of O₂ are present in 44.1 L of O2 at STP.
Learn more about the ideal gas law:
https://brainly.com/question/4147359?referrer=searchResultsExplain why a hydrogen atom doesn’t have a neutron in its nucleus.
Answer: Hydrogen does not contain neutron, because its nucleus is smallest in size which cannot accommodate any heavier neutron. It also makes hydrogen atom unstable in nature.
Explanation:
https://phet.colorado.edu/sims/html/collision-lab/latest/collision-lab_all.html
Answer:
its not pulling up ? ;(
Explanation:
Describe the relationship between the state of matter of water (gas, liquid, solid) and the motion of the water molecules
Water has three states of matter namely gas, solid or ice form and liquid. Molecules in solid state are not able to move since they are tightly packed.
Molecules can move in liquid state and they moves easily in gaseous state.
What is states of matter?Every substance have three states, that are gas, liquid and solid. In solid state, molecules are tightly packed and are unable to move apart. In liquid state, molecules have some space to move and motion of liquid is easy.
The movement of molecules in a substance depends on the space allotted for them or called the volume. More volume between molecules, easy to move apart.
Gaseous state is composed of molecules located far apart from each other and they diffuse easily. Therefore, motion in three states of water is different and moves faster in gaseous state.
To learn more about states of matter, refer the link below:
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A solid is heated to its melting point and the resulting liquid is heated. Choose the graph below that shows these temperature changes.
Describe the five layers of the earth by providing the following information for each layer:
Name of the layer
Composition
Average temperature
Average thickness
make simple! pls
Answer:
answers below
Explanation:
Lithosphere/ Crust- made of large plates that move, average thickness is 30 km, average temperature is 25 degrees Celsius
Inner Core- made of solid iron, 1,200 km thick, 7,000 degrees Celsius
Outer Core- made of a dense liquid of iron and sulfur, 2,250 km thick, 4,000 degrees Celsius
Lower Mantle- made of solid rock, 2,200 km thick, 3,000 degrees Celsius
Asthenosphere/ Upper Mantle- made up of solid rock that flows due to plasticity, 720 km thick, 850 degrees Celsius
Which statement describes a shortcoming of Rutherford’s model of the atom?A.
It incorrectly placed most of the atom’s mass in the nucleus.
B.
It did not explain how electrons behaved and why they don’t collide with the nucleus.
C.
It did not account for the fact that atoms have equal numbers of protons and electrons.
A shortcoming of Rutherford’s model of the atom is it did not account for the fact that atoms have equal numbers of protons and electrons. Therefore, option C is correct.
What is rutherford's model ?Ernest Rutherford, a scientist who was born in New Zealand, developed the Rutherford model to explain an atom. Rutherford oversaw the Geiger-Marsden experiment, which, after Rutherford's analysis in 1911, indicated that J. J. Thomson's plum pudding model of the atom was flawed, in 1909.
The first person to recognize an atom's nucleus was Rutherford. He attacked gold with -particles and discovered that there was positively charged material inside the atom as a result.
It did not explain the distribution of the atom's negatively charged electrons around its positively charged nucleus.
Thus, option C is correct.
To learn more about rutherford's model, follow the link;
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if there is 5 atoms of oxygen in the reactant, how many oxygen atoms must be in the product
Answer:
5
Explanation:
It requires 20 chracters to fill this answer
Turn on "Show formula". What is the formula of this compound?
Answer:
you can find the answer in this link
https://www.coursehero.com/file/p4kfbhi5/B-Turn-on-Show-formula-What-is-the-formula-of-this-compound-Li2O-C-Turn-on-Show/
Reactivity, flammability, and the ability to rust are types of _________.
phase changes
reversible changes
physical changes
chemical properties
Answer:
chemical properties
Explanation:
so EZ
5. Neon has two major isotopes. Neon-20 and Neon-22. Out of every 250 neon atoms, 225 will be Neon-20
(19.992 g/mol), and 25 will be Neon-22 (21.991 g/mol). What is the average atomic mass of Neon?
Answer:
20.1974
Explanation:
The Atomic mass will be the same for every isotope as the number of Neutrons changes, not the number of protons.
Neon has two major isotopes. Neon-20 and Neon-22. Out of every 250 neon atoms, 225 will be Neon-2(19.992 g/mol), and 25 will be Neon-22 (21.991 g/mol), then the average atomic mass of Neon20.1974
What are the difference between atomic number and atomic mass ?Atomic mass of an element can be defined as the total number of neutrons and protons present in the nucleus of an atom and the atomic number is the number of protons present in nucleus.
the average weight of an element is called as atomic mass while atomic number is total number of protons present in the central nucleus of the atom. Atomic mass is presented a symbolic representation of A where as atomic number is represented by the letter Z.
Atomic mass can not classified which type of element where as Atomic number classify and identify the type of element, there are different types of isotopes of an element observed on the basis of their atomic mass where as isotopes only share the same atomic number.
Neon has two isotopes such as , N e 20, N e 21 and N e 22.The average atomic mass can be calculated as:
N e Average atomic mass = [ 19.9924 (90.92 %)] + [ 20.9940 (0.257 %)] + [ 21.9914 (8.82 %)] a m u
Learn more about atomic mass, here:
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Which of the following is a unit of length? O A. A liter O B. A kilogram C. A meter O D. A degree
Answer:
C.) A meter
Explanation:
who do you think has the problem in this communication process
Answer:
what
Explanation:
i d k what this question is
#1. Boyle's Law. A gas with a volume of 4.0 L at a pressure of 205 kPa is allowed to expand to a volume of 12.0 L.
What is the pressure in the container if the temperature remains constant? (Answer is 6.8 kPa).
I NEED TO FIND HOW YOU GET TO THAT ANSWER
The final pressure in the container if the temperature remains constant is 68.3 kPa.
Given the following data;
Initial volume, V1 = 4.0 liters Initial pressure, P1 = 205 kPa Final volume, V2 = 12.0 LitersTo find the final pressure in the container if the temperature remains constant, we would use Boyle's Law:
Mathematically, Boyle's law is given by the formula;
[tex]P_1V_1 = P_2V_2[/tex]
Where;
P1 is the original (initial) pressure. P2 is the final pressure.V1 is the original (initial) volume. V2 is the final volume.Substituting the values into the formula, we have;
[tex]205[/tex] × [tex]4 =[/tex] [tex]12P_2[/tex]
[tex]820 = 12P_2\\\\P_2 = \frac{820}{12}[/tex]
Final pressure, P2 = 68.3 kPa
Therefore, the final pressure in the container if the temperature remains constant is 68.3 kPa.
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someone help me please i need to finish this
the answer is D hope it helps :)
Which of the following natural processes will NOT directly result in the formation of sedimentary rock?
A. River Flow
B. Windstorm
C. Metamorphic change
D. Glacial Motion
Answer:
Windstorm Hope it helped brainiest plz and thank you have a great day!!!
Explanation:
Which of the following natural processes will NOT directly result in the formation of sedimentary rock?
B. Windstorm
what is the net ionic equation for ammonium chloride and sodium hydroxide
Answer:
In the complete ionic equation, soluble ionic compounds and strong acids are rewritten as dissociated ions. write the ionic and net ionic equation for this equation: Ammonium Chloride + Sodium Hydroxide NH_4Cl + NaOH = NH_3 + H_2O + NaCl There are so many chemical reactions that occur around us that we classify them into different types.
Explanation:
What is the specific heat of a diamond if 4.5 J of heat is required to heat a 0.72 g piece of diamond
from 10°C to 22.3°C?
Answer:
0.51 J/g°C
Explanation:
please help me solve this
Answer:
dude your handwriting!!!
Ryan just joined the track team. He runs the 40 yard dash in 6.4 seconds. Explain three human body systems that work together to help Ryan run.
Answer:
Respiratory because you use a lot of cellular respiration to bring oxygen into the body.
Nervous because signals are sent from our brain to our muscles.
Circulatory to help with breathing and movement of blood and oxygen
Explanation:
Hope this helps!
The diameter of Mercury is 4,878,000 meters.
Type your answer..
Answer:
The diameter of a mercury atom is 151 pm and the diameter of the planet Mercury is 4,879.4 km.