Answers
Answer:
Osmosis depends on the movement of water particles across the cell membrane.
Explanation:
Related Questions
So I’m in science and it says “The three major areas of professional careers are I have no idea what to put can somebody please help me
Answers
Answer:
I’m getting 1 hour and 50 minutes
Explanation:
Answer:
its Teaching, research, design.
Explanation:
hope this helps :)
A weather balloon has at 27.0 C , 1.00 atm, with an initial volume of 2.00 liters is released into the atmosphere where the temperature is -23.0 C and the pressure is 0.500 atm.
Answers
Answer:
3.41
Explanation:
(1.00atm) (2.00 L) /(27.0C) = (.500atm) (x)/ (-23.0C)
This is how you set it up because P1V1/T1 = P2V2/T2.
Then you can cross multiple, all units except Liters will cancel and you can solve for x and have your answer.
What are zebra mussels?
Answers
Answer:
The zebra mussel is a small freshwater mussel.
20 POINTS! SAVE ME PLS!!!
What is an easy way to determine the amount of valence electrons that an element will have?
A. The valence electrons are the same as the period number.
B. The valence electrons are the same as the atomic number.
C. The valence electrons are the same as the 1's place of the group number.
D. All of the above.
Answers
Answer:
A. it is A. i am 80% sure it is A,
Explanation:
How many grams in 65 moles of NaCl?
Answers
Answer:0.899076923
Explanation:
Na = 22.99
Cl =35.45
Add them together u get the molar mass of NaCl =58.44
Divide 58.44 by 65
U get 0.899076923
Water in the atmosphers is in its gas form and is called water vapor. Where does most of the water vapor in the atmosphere
evaporate from?
Answers
Answer:
Water vapor can be produced from the evaporation or boiling of liquid water or from the sublimation of ice. Water vapor is transparent, like most constituents of the atmosphere. Under typical atmospheric conditions, water vapor is continuously generated by evaporation and removed by condensation.
convert 2.39 x 1022 molecules of water into moles of water
Answers
Answer:
[tex]0.0397\ \text{mol}[/tex]
Explanation:
Number of molecules of water = [tex]2.39\times 10^{22}[/tex]
[tex]N_A[/tex] = Avogadro's number = [tex]6.022\times 10^{23}\ \text{mol}^{-1}[/tex]
Number of moles is given by
[tex]\dfrac{2.39\times 10^{22}}{6.022\times 10^{23}}[/tex]
[tex]=0.0397\ \text{mol}[/tex]
The number of moles of water is [tex]0.0397\ \text{mol}[/tex].
Perform the following conversions. Show your work and give answer in scientific
notation with correct units.
4.390 m → dm
Answers
4.39 x 10^1 dm
we need to change the m to dm first then make it in scientifiv notation
What must be satisfied for a hypothesis to be useful?
A. It must be theoretical.
B. It must be observable.
C. It must be based on scientific law.
D. It must be testable.
Answers
Scientists currently use radioactive isotopes in various field. Some radioactive isotopes are used to _____.
•power iasers
•develop new antibiotics
•clone organisms
•date ancient bones
Answers
[tex]\huge{\textbf{\textsf{{\color{pink}{An}}{\red{sw}}{\orange{er}} {\color{yellow}{:}}}}}[/tex]
ur answer is:-
date ancient bones
Scientists currently use radioactive isotopes in various field. Some radioactive isotopes are used to date ancient bones.
What are isotopes?Isotopes are defined as substances having same number of protons but different number of neutrons.Number of protons is characteristic for determining position of elements in the periodic table.
Since,all isotopes have the same number of protons and hence have same position.They have similar chemical properties as they have same number of electrons.
They find applications in the field of nuclear medicine and oil and gas research . There are 2 types of isotopes : stable and unstable
Unstable isotopes are radioactive and are called as radioisotopes.Some of these isotopes are man -made and hence also called as artificial isotopes.Every element has an isotope which is either man-made or natural .
Many properties of isotopes depend on mass which is measured in atomic mass unit. The difference in actual mass and mass number is called mass defect.
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How much heat is necessary to change 10.0 g of water from 20 degrees celsius to 75 degrees celcius?
Answers
Answer: 29.6
Explanation:
The amount of heat is necessary to change 10.0 g of water from 20 degrees celsius to 75 degrees Celcius 50 J ( joules).
what is heat?Heat is the transfer of hot energy in the form of potential energy from one source of an object to another source of an object through a medium for the object and the unit of heat is joules.
The amount of heat can be calculated by a formula,
C = Q / ΔT × m
m = mass, Q = total heat, ΔT is changing in temperature.
substituting the value in the equation,
C = 75/ (75-20) 10
C = 50 J ( joules)
Therefore, 50 J ( joules) is the amount of heat necessary to change 10.0 g of water from 20 degrees Celsius to 75 degrees Celcius.
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How much energy is required to heat up a Styrofoam cup from 25oC to 40oC? The mass of the cup is 20 grams and the specific heat capacity of Styrofoam is 1.1 J/(g *oC).
Answers
Answer:
Q = 440 J
Explanation:
Given data:
Heat required = ?
Initial temperature = 25°C
Final temperature = 40°C
Mass in gram = 20 g
Specific heat capacity = 1.1 J/g.°C
Solution:
Formula:
Q = m.c. ΔT
Q = amount of heat absorbed or released
m = mass of given substance
c = specific heat capacity of substance
ΔT = change in temperature
ΔT = 40°C - 20°C
ΔT = 20°C
Q = 20 g×1.1 J/g.°C × 20°C
Q = 440 J
5. As a sample of matter is heated, its particles *
O A are unaffected
O B. move more quickly
O C. move more slowly
D. stop moving
Answers
Answer:
B. move more quickly
Explanation:
As a sample of matter is heated, we know that the particles begins to move more quickly.
This is because the temperature of a substance is directly proportional to the average kinetic energy of a system.
As the temperature increases, the body gains more kinetic energyThis is translated to the particles of the medium. Then they begin to move quickly and very fast enough.20 POINTS! SAVE ME PLS!
Which ion below is fluorine most like to form? A) F+1 B) F+2 C) F-1 D) F-2
Answers
OPTION C) F-1
How many molecules are there in 42 grams of AIF3
Answers
Answer:
The correct answer is - 3.012×10^23 molecules
Explanation:
The number of molecules is present in any mole of an element or compound are the same. To find the molecules you need to multiply the number of the moles of the compound by Avogadro's number:
Moles are calculated from the molecular weight, for AlF3
= 26.98 + 3×19
= 26.98 + 57
= 83.98
Then moles in 42 grams:
= 42/83.98
= 0.5001190 moles
Now the number of molecules = moles*Avogadro's number
= 0.500110×6.022×10^23
= 3.011×10^23 molecules
You have a 50.00 gram sample of a compound whose molecular weight is 180.156. On decomposition, the weights of
the component elements are 20.00 grams of carbon, 3.36 grams of hydrogen, and 26.64 grams of orygen,
The molecular formula for the compound is c o
Answers
Answer:
C6H12O6
Explanation:
Had the same question and it said it was the right answer :)
You have a 50.00 gram sample of a compound whose molecular weight is 180.156. On decomposition, the weights of the component elements are 20.00 grams of carbon, 3.36 grams of hydrogen, and 26.64 grams of oxygen, The molecular formula for the compound is C₆H₁₂O₆.
What is molecular formula ?
The term molecular formula is defined as an expression that defines the number of atoms of each element in one molecule of a compound.
A molecular formula tells us which atoms are present in a molecule and how many of each type of atom are present. When there is only one atom of a given type, no subscript is used.
Molar mass of carbon is 12 grams per mole.
Molar mass of hydrogen is 2.016 grams per mole.
Molar mass of oxygen is 16 grams per mole.
Molecular weight of compound = 180.156
= 12 × 6 + 2 × 12 + 16 × 6
= 72 + 24 + 96
= 180
So, compound is C₆H₁₂O₆
Thus, The molecular formula for the compound is C₆H₁₂O₆.
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Which compound is formed from its elements by an
exothermic reaction at 298 K and 101.3 kPa?
Answers
Answer:
H2O(g) (negative)
Explanation:
4. How many Carbon atoms are present in 1.00 mole of methane, CH,?
6.02 x 1025
o
3.01 x 1023
0
6.02 x 1023
o
O
12.04 x 1023
0
Answers
Answer: 6.02*10^23
Explanation:
1 mole of anything is 6.02*10^23
1 atom C per CH4
How many moles are in 4.85 x 10^25 atoms of carbon?
Answers
Answer:
4.85 x 10^25
Explanation:
thats what i was told by a calculator
Two asteroids (rock) are flying toward earth. One rock has a mass of 1000 kg and the other rock has a 2000 kg. Which rock has a greater gravitational attraction to earth?
Answers
Answer:
The rock which has 2000kg to earth
Answer:
1000kg rock has a greater gravitation
starting with the idea of isostasy and ending with plate tectonics, explain how scientists understanding of the earth's crust has changed
Answers
Plate Tectonics is the study of the movement and changes in the rocks that make up the earth's crust. Isostasy is the equilibrium in the earth's crust maintained by a flow of rock material in the asthenosphere.
The concept behind pre-continental drift was that in addition to the pressure of contraction, isostatic adjustments also caused the crust's heavier portions to sink and its lighter portions to rise. It was believed that the Earth's interior was a viscous fluid that could support this rising and sinking.Wegener put up the theory that continents can move in 1915 based on fossil data, how coasts appeared to fit together, and other traits, but it was not well received at the time.He noticed that rock ages, and mountain belts match up across the boundaries of continents if you put the continents back together as the "jigsaw puzzle fit" proposes.On continents that are currently divided by water, fossils of identical terrestrial flora and animals have been discovered.New data from the ocean floor, including topography and rock magnetism, played a major role in the development of plate tectonic theory in the 1960s.On the basis of symmetrical patterns, seafloor spreading was hypothesized as a mechanism to propel the migration of the continents.Hence this led to scientists understanding of the earth's crust has changed.
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The analysis of data leads to _____.
A. theories
B. variables
C. hypotheses
D. conclusions
Answers
Answer: D, Conclusions
Explanation: Gradpoint
2H2O = 2H2 +O2
If 30mL of hydrogen are produced in above reaction, how many mL of oxygen are produced? Please show work.
Answers
Answer:
15 mL of O₂.
Explanation:
The balanced equation for the reaction is given below:
2H₂O —> 2H₂ + O₂
From the balanced equation above,
2 mL of H₂O reacted to produce 2 mL of H₂ and 1 mL of O₂.
Next, we shall determine the volume of H₂O needed to produce 30 mL of H₂. This can be obtained as follow:
From the balanced equation above,
2 mL of H₂O reacted to produce 2 mL of H₂.
Therefore, 30 mL of H₂O will also react to produce 30 mL of H₂.
Thus, 30 mL of H₂O is needed for the reaction.
Finally, we shall determine the volume of O₂ produced from the reaction. This can be obtained as follow:
From the balanced equation above,
2 mL of H₂O reacted to produce 1 mL of O₂.
Therefore, 30 mL of H₂O will react to produce = (30 × 1)/2 = 30/2 = 15 mL of O₂.
Thus, 15 mL of O₂ were produced from the reaction.
ASAP , 8.81 g Carbon
Molar Mass: 1362.5 g/mol
91.2 g Chlorine
What is the empirical formula and molecular formula ?
Answers
The empirical formula : C₂Cl₇
The molecular formula : C₁₀Cl₃₅
Further explanationGiven
8.81 g Carbon
91.2 g Chlorine
Molar Mass: 1362.5 g/mol
Required
The empirical formula and molecular formula
Solution
Mol ratio :
C = 8.81 g : 12.011 g/mol =0.733
Cl = 91.2 g : 35,453 g/mol = 2..572
Divide by 0.733
C : Cl = 1 : 3.5 = 2 : 7
The empirical formula : C₂Cl₇
(The empirical formula)n = the molecular formula
(C₂Cl₇)n = 1362.5
(2x12.011+7x35.453)n=1362.5
(272.193)n=1362.5
n = 5
helppp nowwww plsss
Answers
Answer:
The answer is number 2.
Explanation:
How many grams of aluminum in required to produce 17.5 g of hydrogen
Answers
Mass of Aluminum = 157.5 g
Further explanationGiven
17.5 g of Hydrogen
Required
Mass of Aluminum
Solution
Reaction
2Al + 3H₂SO₄ → Al₂(SO₄)₃ + 3H₂
mol Hydrogen :
= mass : molar mass
= 17.5 g : 2 g/mol
= 8.75
From the equation, mol Al :
= 2/3 x mol H₂
= 2/3 x 8.75
= 5.83
Mass Al :
= 5.83 x 27 g/mol
= 157.5 g
Consider the following reaction:
Cl2 + Na2S → 2NaCl + S
The percent yield of sulfur when 71.0 g of Cl2 is reacted in
excess Na2S solution is 73.0 %.
What is the actual mass of sulfur yielded by this reaction?
(Molar mass of S = 32.1 g/mol, molar mass of Cl2 = 71.0 g/mol)
Answers
Answer:23.4
Explanation:
Please help!!!!!!!!
Alyssa has four different subjects oil water sand and air. she would like to fill four Identical balloons with these materials until all of the balloons have the same mass. Which balloon would take up the most space
Answers
Answer:
air
Explanation:
The material that will take up the most space is air. Air and most gases have no definite volume.
They simply take up shape and volume of any medium they are introduced into.
The attribute of no fixed shape and volume sets gases apart from other matter. The air will fill the entire space of the balloon and it will have the most volume. Oil, water and sand have fixed volume that is predetermined.Answer:
Air
Explanation:
The material that will take up the most space is air. Air and most gases have no definite volume.
They simply take up shape and volume of any medium they are introduced into.
The attribute of no fixed shape and volume sets gases apart from other matter.
The air will fill the entire space of the balloon and it will have the most volume.
Oil, water and sand have fixed volume that is predetermined.
lithium sulfate + magnesium nitrate =
Answers
Answer:
Magnesium Sulfate + Lithium Nitrate
Explanation:
Magnesium Nitrate + Lithium Sulfate = Magnesium Sulfate + Lithium Nitrate.
The complete word equation for this reaction is:
lithium sulfate + magnesium nitrate = lithium nitrate+ magnesium sulfate
Balanced chemical reaction:When lithium sulfate reacts with magnesium nitrate, lithium nitrate and magnesium sulfate are formed. This type of reaction is also known as a double displacement reaction. In this type of reactions ions of the salts get exchanged to form the new salts.
Word equation:
lithium sulfate + magnesium nitrate = lithium nitrate+ magnesium sulfate
Chemical equation:
[tex]Li_2SO_4+ MgNO_3---- > LiNO_3+ MgSO_4[/tex]
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20 POINTS PLS SAVE ME!!!!
If an element is a metal, is it more likely to ________ its valence electrons when it bonds. When it does that, it will become _________.
A. add to, a cation
B. lose, an anion
C. add to, an anion
D. lose, a cation
Answers
Answer:
Uhhh d ?
Explanation: