Answers
Answer:
From my side the correct option is "A"
Explanation: Reasons for its correction are ,
1) Highly reactive: Nanoparticles are therefore extremely unstable and easily change themselves or react with active substances to reach a relatively stable state in some cases. This causes desired changes or undesired changes to nanoparticles and thus makes them exhibit a high reactivity and a poor stability.
2)Small size: Nanotechnology can provide rapid and sensitive detection of cancer-related molecules, enabling scientists to detect molecular changes even when they occur only in a small percentage of cells. Nanotechnology also has the potential to generate entirely novel and highly effective therapeutic agents.
Related Questions
A gas has a volume of 250.0 liters at 17.0 °C and 3.00 atm of pressure. what volume must the gas be increased for the gas to be at STP conditions?
Answers
Answer:
0.706 L (Liters)
Explanation:
P1V1 = P2 V2 3 atm 250.0 mL = 1 atm X
T1 T2 290 K 273 K
706 mL = X
According to the question,
Pressure,
Initial, [tex]P_1 = 3 \ atm[/tex]Final, [tex]P_2 = 1 \ atm[/tex]Temperature,
Initial, [tex]T_1 = 17^{\circ} C[/tex] or, [tex]290 \ K[/tex]Final, [tex]T_2 = 273 \ K[/tex]Volume,
Initial, [tex]V_1 = 250 \ L[/tex]Final, [tex]V_2 = \ ?[/tex]By using the Boyl's and Charl's combination law, we get
→ [tex]\frac{P_1 V_1}{T_1} = \frac{P_2 V_2}{T_2}[/tex]
or,
→ [tex]V_2 = \frac{P_1 V_1 T_2}{T_1 P_2}[/tex]
By putting the values, we get
→ [tex]= \frac{3\times 250\times 273}{290\times 1}[/tex]
→ [tex]= 706 \ L[/tex]
Thus the aforementioned answer is right.
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Which of the following is not a form of precipitation?
A
groundwater
B
balls of hail
C
sleet
D
snowflakes
Answers
A.
Reason: cuz i need points noob
An object has a volume of 825 cm3 and a density of 13.6 g/cm3. Find its
mass
Answers
step by step explanation:
D= M/V
M= DV
M= (13.6 g/cm^3) (825cm^3)
M= 11,200 g
The mass of an object is the product of its volume and density. The mass of a the object with a volume of 825 cm³ and a density of 13.6 g/cm³ is 11220 g.
What is density ?Density of substance is the measure of its mass per unit volume. It describes how closely its particles are packed. Density depends on the bond type, temperature and pressure.
Volume of the object is the space occupied by its particles. Volume can be expressed in L, ml, cm³, dm³ etc. Only solids and liquids has a definite volume and the volume of gases is that of the container.
Give that, volume of the object = 825 cm³
density = 13.6 g/cm³
Mass = volume × density
m = 825 cm³ × 13.6 g/cm³ = 11220 g
Therefore, the mass of the object is 11220 g.
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help I'm giving you a lot of points and do not put random or crazy stuff the real question
You are trying to design a homemade ice pack. As you select the chemicals for this reaction, should you choose an endothermic reaction or an exothermic reaction? Why?
Answers
Answer:
Endothermic
Explanation:
Because Endothermic is cold and exothermic is hot and if you are using an ice pack it would be Endothermic and if you were using something that was hot it would be exothermic
5. Solve the following crossword puzzle.
a. Maximum energy generation in India is done using ........ energy.
b. energy is a renewablesource of
energy.
c.Solar energy can be called.... energy.
e. ......... energy of water in dams is used for generation of electricity.
Answers
Answer:
I think it is b
Explanation:
How many atoms are there in 3.3 moles of strontium?
Answers
Explanation:
Multiply the moles Fe by 6.022×1023 atoms/mol
Atmosphere
B
Ocean
Land
с
Which arrow or arrows represents a change of state from a liquid to a gas caused by the
sun's energy?
A. arrow A
B. arrow B
C. arrow A and arrow B
D. arrow B and arrow C
Answers
PLEASE HELP!! ILL MARK BRAINLIST!!
Answers
TOMMY (persistently but a little intimidated by the crowd) It's always that way, in every story I ever read about a ship landing from outer space. —The Monsters Are Due on Maple Street, Rod Serling What scientific fact is Tommy’s theory based on? Meteors can do some crazy things. Spaceships often land on Earth. Technology makes space travel possible. Meteors can move people from planet to planet.
Answers
Answer:
Technology makes space travel possible.
Explanation:
bc the guy above me is wrong I had to guess and I got it right
Answer:
Technology makes space travel possible.
Explanation:
got it right on edge
Calculate the mass of 4.55x1024 molecules of sucrose
Answers
Answer:
2584 g
Explanation:
The molecular formula for sucrose is C₁₂H₂₂O₁₁, which means its molar mass is 342.3 g/mol.
First we convert molecules into moles by using Avogadro's number:
4.55x10²⁴ molecules ÷ 6.023x10²³ mol/molecules = 7.55 molNow we convert moles of sucrose into grams, using its molar mass:
7.55 mol * 342.3 g/mol = 2584 gAt what temperature will 41.6 grams of nitrogen gas (N2) exert a pressure of 1 point
1.07 atm in a 20.0 L cylinder?
Answers
Answer:
The temp is 176k
Explanation:
Hi! My responsibility is to add and protection to plant cells. what i am
Answers
in the reaction A+B = C+D if B is the excess what is the limiting reactant
Answers
Explanation:
Determining the Limiting Reagent
One reactant (A) is chosen, and the balanced chemical equation is used to determine the amount of the other reactant (B) necessary to react with A. If the amount of B actually present exceeds the amount required, then B is in excess, and A is the limiting reagent.
Which statement correctly compares electric charge with electric current?
A.
They both require a human to make them.
B. Neither require charged particles.
C. They both require a battery and a bulb
D. They both require a movement of charged particles.
Answers
Answer:
Your answer would be D) They both require a movement of charged particles
Explanation:
In short terms both the charge and the current are made up of charged particles that are always moving, they constantly move to well... stay charged, if they stopped, then the charge would fade until there is nothing left, and if there is nothing left -it means there would be no electricity to use
~Notify me if you have questions~
Have a nice day and hope it helps!
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Put the following metals in order of reactivity.
Iron, potassium, copper, zinc, lead, calcium, magnesium, sodium, gold
Most reactive
Least reactive
Complete the equations
metal + oxygen → …………………….
metal + water → ……………………. + …………………….
metal + acid → ……………………. + …………………….
What is formed when magnesium burns in air?
…………………….…………………….…………………….…………………….
What happens when copper is put into a beaker of water?
…………………….…………………….…………………….…………………….
How do you test for hydrogen gas?
…………………….…………………….…………………….…………………….
What is formed when sodium reacts with hydrochloric acid?
…………………….…………………….…………………….…………………….
How should metals more reactive than carbon be extracted from their ores?
…………………….…………………….…………………….…………………….
Why is gold used in jewelry?
…………………….…………………….…………………….…………………….
What is the rule for displacement reactions?
…………………….…………………….…………………….…………………….
Tick which reactions would happen
copper
Magnesium
zinc
copper sulfate
Magnesium
sulfate
Zinc Sulfate
Using the reactions from Q10. Choose 1 reaction you’ve ticked and explain why it happens. Choose 1 reaction you haven’t ticked and explain why it doesn’t happen.
…………………….…………………….…………………….…………………….
…………………….…………………….…………………….…………………….
…………………….…………………….…………………….…………………….
…………………….…………………….…………………….…………………….
Write word and symbol equations for the first reaction from Q11.
…………………….…………………….…………………….…………………….
…………………….…………………….…………………….…………………….
Answers
Answer: copper, zinc, lead, magnesium, potassium, sodium, iron, gold.
Explanation:
What is genetic variation?
Answers
What did Antoine Lavoisier’s experiments demonstrate?
A. Atoms always split into pairs during a chemical change.
B. Mass is neither lost nor gained during a chemical change.
C. Matter can be created during a chemical change.
D. Energy is neither lost nor gained during a chemical change.
Answers
Think of a substance that does not dissolve in water. Any Examples?
Answers
Answer:
sand, flour, water
Explanation:
Some substances that don't dissolve in water:
- sand
-flour
-oil
-fats
-plastics
please help PLSSSS
2020020200
Answers
Answer:Well the water molecules attract each other, and the oil molecules stick together.
sorry number two im not sure sorry:(
Explanation:
5. A fireplace fire heating a room on a cold day is an example of what type of heat
transfer? What are the steps of heat transfer?
A. Conduction, fireplace>room
B. Conduction, room>fireplace
C. Radiation, fireplace>room
D. Radiation, room>fireplace
Answers
Answer:
I think the answer is C- radiation
Explanation:
If its not C its A Hope this helps forgive me if i'm wrong :/
Answer: C
Explanation: The fire in the fireplace is giving off heat because it doesn't need a medium to travel through.
PLEASE HELP ILL EVEN MARK AS BRAINLIEST
Answers
Answer:
Cl: -29.272*
Explanation:
The other temperatures go from lowest to highest, H: -423* F, N: -320* F, F: -306.6* F
PLEASE HELP!!!
True or False: Density is the property of a substance that describes how much mass of a substance is contained in the given weight of the substance.
A simple true or false please!
Answers
Answer:
False
Infered from the equation:
Density=[tex]\frac{Mass}{Volume}[/tex]
So it has no relation with weight of substance
What might the student have done that caused this
error? List all possible causes.
Answers
Answer:
The capillary tube was too close to the bottom of the beaker.
The ruler may have moved.
Water got into the capillary tube.
The temperature was not allowed to equilibrate in the 2-4 minutes.
Explanation:
Bill stands in a swimming pool and notices that the water around his feet is a lot cooler than the water near the surface which process causes this difference in temperature?
1. convection
2. evaporation
3. radiation
4. conduction
Submit Answer
Answers
Answer:
convection
Explanation:
What is the volume of a 492.2g sample of Kr gas?
0.007601 L
131.6 L
5.870 L
21.97 L
Answers
Answer:
131.6 L
Explanation:
Ideal gas law is valid only for ideal gas not for vanderwaal gas. Therefore, the correct option is option B that is 131.5l. There is no force of attraction between the particles.
What is ideal gas equation?Ideal gas equation is the mathematical expression that relates pressure volume and temperature. Ideal gas is a hypothetical gas. Vanderwaal behave as ideal gas at high temperature and low pressure.
Mathematically,
PV=nRT
where,
P = pressure=1 atm
V= volume=?
n =number of moles=given mass/ molar mass
= 492.2/ 83.79
= 5.87 moles
T =temperature = 273K
R = Gas constant = 0.0821 L.atm/K.mol
1× V = 5.87 × 0.0821 L.atm/K.mol × 273 K
V =131.5l
131.5l is the volume of a 492.2g sample of Kr gas.
Therefore, the correct option is option B that is 131.5l.
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4. What is the correct surface areas for a 45nm
wide cube?
Answers
Answer:
A = 12150 nm²
Explanation:
The side of a cube, a = 45 nm
We need to find the surface area of the cube.
The formula for the surface area of a cube is given by :
A = 6a²
Substituting the value of a in the above formula.
A = 6(45)²
= 12150 nm²
So, the surface area of the cube is 12150 nm²
what is a similar math problem to the calcium and water equation
Answers
Answer: Calcium is a metal and a typical reaction of a metal with water will be as follows: ... the chemical reaction for calcium and water will be: [Word Equation] Calcium + 48.
Explanation: Please Please mark me as brainliest!
In the laboratory you dissolve 12.7 g of silver fluoride in a volumetric flask and add water to a total volume of 125. mL. What is the molarity of the solution?
Answers
Answer:
Molarity = 2.4 M
Explanation:
Given data:
Mass of silver fluoride = 12.7 g
Volume of water = 125 mL (125 mL× 1 L /1000 mL = 0.125 L)
Molarity of solution = ?
Solution:
Number of moles of silver fluoride:
Number of moles = mass/molar mass
Number of moles = 12.7 g/ 41.98 g/mol
Number of moles = 0.30 mol
Molarity:
Molarity = number of moles of solute / volume in L
Molarity = 0.30 mol / 0.125 L
Molarity = 2.4 M
What is one factor of how species are distributed on the Earth's continents?
Answers
Answer:
The most apparent general environmental factor affecting the distribution of a species is climate. Suitable conditions of temperature and moisture are vital to all organisms. Certain species are intolerant of cold; other species cannot live in warm climates.
How do you shift realities?
I’ve been trying for weeks now
Answers
Answer:
1. learn how to script
2. be in a good state of mind
3. drink water water warer
4.search for yt tutorials
Explanation: