Answer:
See explanation
Explanation:
Sublimation refers to the movement of molecules directly from solid into the vapor or gas phase while deposition refers to the movement of molecules directly from the gas phase into the solid phase. The two are opposite to each other.
Frost is formed in a situation where a substance cools to a temperature that is lower than its dew point. In this situation, the vapour is directly deposited on a surface to form a frost without passing through a liquid phase. Hence the name, deposition.
During a titration a student found that 20.0cm3 of sodium carbonate solution
neutralised 27.9 cm3 of 0.500 mol/dm3 nitric acid solution.
Calculate the concentration of the sodium carbonate solution in mol/dm3. Give
your answer to 3 significant figures.
Answer: The concentration of [tex]Na_2CO_3[/tex] required is [tex]0.349mol/dm^3[/tex]
Explanation:
According to the neutralization law,
[tex]n_1M_1V_1=n_2M_2V_2[/tex]
where,
[tex]n_1[/tex] = basicity of [tex]HNO_3[/tex] = 1
[tex]M_1[/tex] = molarity of [tex]HNO_3[/tex] solution = [tex]0.500 mol/dm^3[/tex]
[tex]V_1[/tex] = volume of [tex]HNO_3[/tex] solution = [tex]27.9cm^3[/tex]
[tex]n_2[/tex] = acidity of [tex]Na_2CO_3[/tex] = 2
[tex]M_1[/tex] = molarity of [tex]Na_2CO_3[/tex] solution =?
[tex]V_1[/tex] = volume of [tex]Na_2CO_3[/tex] solution = [tex]20.0cm^3[/tex]
Putting in the values we get:
[tex]1\times 0.500\times 27.9=2\times M_2\times 20.0[/tex]
[tex]M_2=0.349mol/dm^3[/tex]
Therefore, concentration of [tex]Na_2CO_3[/tex] required is [tex]0.349mol/dm^3[/tex]
Which type of prevailing wind would carry more water vapor (humidity)? (Choose one)
a. A global wind moving over the ocean
b. A global wind moving over land
Answer:
a. A global wind moving over the ocean
Explanation:
The surface water both north as well as
south of the equator do experience
upwelling. There is a rise of the nutrients to the surface . Ocean surface currents occur as a result of global wind as well as the shape of ocean basin and Coriolis effect
which two statements describe events that help drive tectonic plate movement?
A. convection currents cause hotter magma to rise and cooler magma to sink.
B. Subducting plates cause cooling at convergent boundaries
C. Thermal energy from Earth's core is transferred outward to the mantle by conduction
D. Energy from the Sun heats magma beneath earth's surface
Answer:
D B
Explanation:
Will mark branliest!! and 50 points for right answer!
1. which solvent resulted in the best separation of ink? oil or alcohol
2. which marker had a red spot or streak with an Rf value of approximately 0.82? Maker 1, 2, 3, or none?
3. which spot has the lowest rf value in the marker 3s chromatogram? yellow or purple?
4. which marker had a yellow spot with an rf value of approximately 0.60? Marker 1,2,3 or none?
Answer:
Alcohol, 0.63 I don't know the rest the rest
Explanation:
Answer:
Explanation:
1. Alcohol
2. Marker 1
3. Purple
4. Marker 2
Filling out the lab paper gives you the answers. These were all correct.
True or False
All cells are the same on the inside
HELP ME!
What is correct about solubility of
substances?
A.What will sea levels be in 20 and 100 years compared to now????? B.What will the pH of the ocean be in 20 and 100 years compared to now????
what is the uncertian digit in 0.054 g
Answer:
5.4g
Explanation:
True or False: if chemicals behave in a similar way they are grouped together on the periodic table
Answer:
Explanation: it is true
A tall stack of books is sitting on a table. One of the reasons the book stay where they are is because-
Choices:
A: The chair is helping to hold the table up.
B: The table is exerting a balanced force on the books.
C: The books are exerting an unbalanced force on the table.
D: The books keep shifting enough to keep the stack balanced.
Please help me!
I need help, please answer
Answer:
it explodes
Explanation:
Answer:
Mrs girl I'm sorry I don't know
I just need the points
Which type of prevailing wind would carry more water vapor (humidity)? (Choose one)
a. A global wind moving over the ocean
b. A global wind moving over land
Answer:
a global wind moving over the ocean
Explanation:
because it's picking up moisture from the ocean and kind of carrying the water with the wind and water obviously is part of the evaporation so it would kind of turn into water vapor which will have more humidity along with the heat because how the heat warms the water kind of like the sweat from a sweat glands if that makes sense I don't know if that makes sense to you but it makes sense to me lol
Which is an example of a physical change?
gasoline combusting
cake baking
salt dissolving
iron rusting
Answer:
salt dissolving
Explanation:
Hope this helps!
15. What is the name of the part of a cell that allows molecules in, such as glucose and oxygen?
a. Cell wall
b. Ribosome
c. mitochondria
d. Cell membrane
Answer:
D
Explanation:
Hope This Help??
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What is the molarity of a solution made from dissolving 3.0 moles of Saline (NaCl) in 0.25 L of solution?
Answer:
D
Explanation:
all ya got to do is divide the moles from the solution... so 3.0 divided by 0.25. put it in a calculator
hope this helps
The molarity of a solution made from dissolving 3.0 moles of Saline (NaCl) in 0.25 L of solution is 12M.
What is Molarity?Molarity of a given solution is known as the total number of moles of solute per litre of the solution. A solution that is 1.00 molar (written 1.00 M) contains 1.00 mole of solute for every liter of solution.
Molarity = (No. of moles of solute ÷ Volume of solution in liters)
The unit of molarity is mol L⁻¹.
Molarity is temperature dependent because as temperature changes, volume of the solution also changes.
Given,
3.0 moles of Saline (NaCl)
Volume of solution = 0.25L
Molarity = (No. of moles of solute ÷ Volume of solution in liters)
Molarity = 3 ÷ 0.25 = 12 M
Therefore, The molarity of a solution made from dissolving 3.0 moles of Saline (NaCl) in 0.25 L of solution is 12M.
Learn more about molarity, here:
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The offsprings' traits depend on which parent the offspring inherited more copies of genes from. True or False?
Answer:
false
Explanation:
i did the test :)
The offsprings' traits depend on which parent the offspring inherited more copies of genes from. This statement is false.
What is gene ?The biological and functional component of heredity was conveyed from parent to child. Genes are bits of DNA, and the majority of genes include instructions for producing a particular protein.
However, it wasn't until Wilhelm Johannsen proposed calling the Mendelian factors of heredity genes that the name began to catch on. The suggested term was derived from the Greek word "genos," which means "birth." The term gave rise to others like genome.
Through their genes, parents transmit features or qualities to their offspring, such as eye color and blood type. There are several illnesses and medical disorders that can be genetically handed down. Sometimes a trait might take on many different forms.
Thus, The offsprings' traits depend on which parent the offspring inherited more copies of genes from. This statement is false.
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How many moles are there in 100g oh H2O?
Answer:
5.55 moles
Explanation:
Which of the following is not a stimulus?
A hearing a loud noise
B. sneezing
C. touching a hot object
D. tasting a lemon
Answer:
B. sneezing
Explanation:
Because every other one is an action resulting in stimulation.
Is a blender (at home) an example of electrical to mechanical energy? If so, why? Please explain thoroughly
Answer:
Yes it is
Explanation:
You use electricity to power the blender itself, then after you power it the potential energy becomes kinetic energy which equals mechanical energy in the blender. So yes, a blender is an example of electrical to mechanical energy.
where are examples of short term enivronmental change? check all that apply
A. tsunamis
B. El Niño
C. large asteroid and comet impacts
D. volcanic eruptions
E. global warming
Which students propose a conservation strategy that represents reducing the use of
natural resources?
A Students W and Z
B Students W and X
C Students X and Y
D Students Y and Z
Answer:
student A
Explanation:
When heating a liquid in a test tube, which of the following safety precautions should you take?
A.
Wear latex gloves.
B.
Heat the test tube on an open flame if possible.
C.
Put a tight lid on the test tube.
D.
Angle the test tube away from yourself and others.
Answer:
D
Explanation:
so that incase the liquid being heated splashes it doesn't land on anyone's skin
Which of the following will decrease the rate of dissolution of a gas in a liquid?
a. increase pressure
b. increase temperature
c. decrease agitation
11.
The characteristics of a group of elements are listed in the table.
Characteristics of a group of Elements
• Solid at room temperature
• Good conductor of electricity
• Atoms have one valence electron
Which of these elements is in this group?
A. Sodium
B. Phosphorus
C. Bromine
D. Neon
Answer:
Sodium
Explanation:
I dont know but its a wild guess
Answer:
sodium
Explanation:
its solid at room temp, most metals are good conductor of electricity and also its in group 1A so it has one valence electron
Which mutation in a fruit fly could be passed on to its offspring
Are humans more similar to trees or bacteria? How do you know?(1 point)
A
Humans are more similar to bacteria because trees cannot move around their environment.
B
Humans are more similar to trees because bacteria are too small to see.
C
Humans are not similar to trees or bacteria. Humans are a special species that is not related to any other species on Earth.
D
Humans are more similar to trees because all plants and animals are part of the same domain.
Answer:
a
Explanation:
Answer:
Option D
Explanation:
A and B both make sense to some level.
For option A,trees can only move while bacteria and humans can both move and locomote so there's that similarity
For option B,humans and plants are not micro organisms but bacteria are so there's that similarity
Option C is just not true
Option D is the right answer thus both humans and animals are eukaryotes
Which of the following gas samples would contain the same amount of gas as 200 mL of helium, He(g), at 25° C and 1 atm?
Select one:
a. all the above
b. 200 mL of neon, Ne (g), at 25° C and 1 atm
c. 40 mL of methane, CH4 (g), at 25° C and 1 atm
d. 400 mL of hydrogen, H2 (g), at 25° C and 1 atm
Need done asap! Will give 5 stars!
Answer:
[tex]200\; \rm mL[/tex] of neon [tex]\rm Ne\, (g)[/tex] at [tex]25^{\circ} \rm C[/tex] and [tex]1\; \rm atm[/tex] (the second choice) would contain an equal number of gas particles as [tex]200\; \rm mL\![/tex] of [tex]\rm He \, (g)[/tex] at [tex]25^{\circ} \rm C\![/tex] and [tex]1\; \rm atm\![/tex] (assuming that all four gas samples behave like ideal gases.)
Explanation:
By Avogadro's Law, if the temperature and pressure of two ideal gases is the same, the number of gas particles in each gas would be proportional to the volume of that gas.
All four gas samples in this question share the same temperature and pressure. Hence, if all these gases are ideal gases, the number of gas particles in each sample would be proportional to the volume of that sample. Two of these samples would contain the same number of gas particles if and only if the volume of the two samples is equal to one another.
The second choice, [tex]200\; \rm mL[/tex] of neon [tex]\rm Ne\, (g)[/tex] at [tex]25^{\circ} \rm C[/tex] and [tex]1\; \rm atm[/tex], is the only choice where the volume of the sample is also [tex]200\; \rm mL \![/tex]. Hence, that choice would be the only one with as many gas particles as [tex]200\; \rm mL\![/tex] of [tex]\rm He \, (g)[/tex] at [tex]25^{\circ} \rm C\![/tex] and [tex]1\; \rm atm\![/tex].
4) Calculate the net force *
3 N
10-7= 3
the arrows are opposing each other.
Answer:
The net or resultant force depende on the direction we can easily understood the directions are opposite .Force is vector so if vectors are opposite we difference the two vectors.
10N-7N=3N
Photosynthesis and cellular respiration have a unique relationship in that the products of one process are the reactants of the other. For example the products of photosynthesis are reactants of cellular respiration.
Select ALL of the molecules that are produced in photosynthesis and then used in cellular respiration.
A) ATP
B) water
C) oxygen
D) glucose
E)carbon dioxide
Answer:
the answer is c) oxygen and D) glucose. Read the question correctly. it says what is *produced* in photosynthesis and *used* in cellular respiration.
Explanation:
photosynthesis produced oxygen and glucose to which cellular respiration uses (glucose and oxygen) to produce carbon dioxide and water. so carbon dioxide and water ARE NOT the answer to this.
also I took the test so yeah
The molecules that are produced in photosynthesis and then used in cellular respiration include the following: oxygen and glucose.
PHOTOSYNTHESIS:
Photosynthesis is the process whereby green plants obtain their own food using energy from sunlight. Photosynthesis generally combines carbon dioxide and water molecules to produce glucose and oxygen as products. 6CO2 + 6H2O → C6H12O6 + 6O2CELLULAR RESPIRATION:
Cellular respiration is the process whereby living organisms obtain energy by breaking down food molecules. Cellular respiration uses the products of photosynthesis, which are glucose and oxygen, to synthesize energy and giving off carbon dioxide and water as products. C6H12O6 + 6O2 → 6CO2 + 6H2OTherefore, molecules that are produced in photosynthesis and then used in cellular respiration include the following: oxygen and glucose.Learn more at: https://brainly.com/question/1388366?referrer=searchResults
help plzzzzzzz 17 points!!!
Answer:
2 Li(s) + 2 H2O(l) = 2 LiOH(aq) + H2(g)