Answer:
Surface tension causes water to form spherical droplets and allows it to support small objects, like a scrap of paper or a needle, if they are placed carefully on its surface.
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High surface tension is the characteristic of water which helps it form droplets.
What is Cohesion of water ?It is the attractive force between the water molecules. Cohesion is the property of water that explains that how water molecules interact with each other that means water likes to stick to itself.
Now lets check all options one by one:
Option (A): Low specific heat
Water has high specific heat due to the hydrogen bonding.
So, it is incorrect option.
Option (B): Non polar structure
Water molecule is polar covalent molecule because of its shape. The shape of the water molecule is bent.
So, it is incorrect option.
Option (C): High surface tension
Stronger the cohesion force then stronger the surface tension. It is responsible for the shape of the liquid droplets.
So, it is correct option.
Option (D): Ability to dissolve substance
It has ability to form hydrogen bond which makes an water a good solvent. Water is universal solvent.
So, it is incorrect option.
Thus, from above conclusion we can say that High surface tension is the characteristic of water which helps it form droplets.
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1. An atom of an elephant has atomic mass of 39 and has number of neutrons as 20 calculate protons number.
2. An atom of an elephant has the atomic number of 13 and 14 neutrons
A. What is the mass number
B. write the nuclear notation given the atoms as X.
C. How many electrons does atom X have?
D. what is number of protons.
Answer:
See Explanation
Explanation:
1) Let us recall that;
Mass number = number of protons + number of neutrons
Where;
Number of protons = ?
Number of neutrons =20
Mass number =39
Number of protons = mass number - number of neutrons
Mass of protons =39 - 20= 19 protons
2) Atomic number = 13
Number of neutrons =14
Then the mass number =13 +14 =27
The symbol of the element is 27X13
The number of protons= the number of electrons =13
The atomic number is the same as the proton number =13
A seais usually defined as A.A body of freshwater that is not connected to the ocean B. A body of freshwater that is connected to the ocean C. A body of salt water that is not connected to the ocean D. Body of salt water that is connected to the ocean
Answer:
D. Body of salt water that is connected to the ocean
Explanation:
An ocean is a body of salt water which covers approximately 70% of the Earth's surface. About 97% of the Earth's water is comprised of ocean and as such it is the most prominent and defined feature of the Earth. There are basically four (4) categories of an oceanic basin and these are;
1. The Pacific ocean.
2. The Artic ocean.
3. The Atlantic ocean.
4. The Indian ocean.
A sea is usually defined as a body of salt water that is connected to the ocean and are surrounded (enclosed) by land partially.
Basically, a sea is formed where a land and an ocean meet and as a result, an ocean is usually bigger than a sea.
Some examples of seas around the world are Red sea, Mediterranean sea, Sargasso sea, Caribbean sea, Baltic sea, Caspian sea, Chuckchi sea, etc.
Answer:
Yes The Anwer is D Hope This Help:)
A d orbital can
hold ____ electrons.
A. 2
B. 6
C. 10
D. 14
Answer:
10 electrons
Explanation:
What mass of methanol (CH3OH) is produced when 140.1 g of carbon
monoxide reacts with 12.12 g of hydrogen?
CO(g) + 2H2(g) → CH2OH()
A. 160.2g
B. 96.12 g
C. 6.06 g
D. 192.2g
Answer:
B. 96.12 g
Explanation:
To solve this question we must convert each reactant to moles. Using the balanced equation we can find limiting reactant. With moles of limiting reactant we can find the moles of methanol and its mass:
Moles CO -Molar mass: 28.01g/mol-
140.1g CO * (1mol / 28.01g) = 5.0 moles CO
Moles H2 -Molar mass: 2.01g/mol-
12.12g * (1mol / 2.01g) = 6.03 moles H2
For a complete reaction of 5.0 moles of CO are required:
5.0moles CO * (2mol H2 / 1mol CO) = 10.0 moles of H2 are required
As there are just 6.03 moles, H2 is limiting reactant.
The moles of methanol produced are:
6.03 moles H2 * (1mol CH3OH / 2mol H2) = 3.015 moles CH2OH
Mass CH3OH -Molar mass32.04g/mol-:
3.015 moles CH2OH * (32.04g/mol) =
96.6g CH3OH ≈ B. 96.12 g
which environment would experience more humidity
A: Desert
B: Grassland
C: Mountain
D: Swamp
Answer:
Explanation:
You'r answer should be D
What is the energy transformation from wind to usable energy
Answer:
A turbine takes the kinetic energy of a moving fluid, air in this case, and converts it to a rotary motion.
Explanation:
True or False. The loads in a parallel circuit do not necessarily all have the same amount of current in them.
Answer:
TRUE
Explanation:
gases have maximum density and rigidity true or false
Answer:
This statement is true.........
Answer:
i think true
Explanation:
Can you please help me with this?
What happens with the evaporation of raindrops in the atmosphere?
Answer:
they become water vapor and after that, they become a type of precipitation
Is there any evidence that the particles in a solid and liquid move? Provide examples.
Answer:
maybe not solid but a liquid yes
Answer:
yes
Explanation:
the molecules move
What is Rin the ideal gas law equation?
A. The kinetic energy of the gas
B. The molar mass of the gas
C. The number of moles of the gas
D. The ideal gas constant
Answer:
R is the ideal gas constant
Check all that indicate a chemical change. Check all that apply. Group of answer choices aqueous solutions of silver nitrate and sodium chloride turn cloudy after mixing aqueous solutions of hydrochloric acid and sodium hydrogen carbonate produces bubbles on mixing Sodium hydroxide is mixed with water and the container feels warmer Water is added to orange juice is the color becomes lighter. No answer text provided. ice melts on a bench top at room temperature
Answer:
aqueous solutions of silver nitrate and sodium chloride turn cloudy after mixing aqueous solutions of hydrochloric acid and sodium hydrogen carbonate produces bubbles on mixing Sodium hydroxide is mixed with water and the container feels warmer
Explanation:
A chemical change involves the formation of new substances. Also heat is absorbed or released in a chemical change. Another name for a chemical change is a chemical reaction.
In the first case, a reaction of the sort;
AgNO3(aq) + NaCl(aq) ---> AgCl(s) + NaNO3(aq)
The cloudy solution is due to the formation of AgCl precipitate.
In the second case, a reaction of the sort;
HCl(aq) + NaHCO3(aq) ---> NaCl(aq) + CO2(g) + H2O(l)
The gas evolved is due to the formation of CO2 in the process. Heat is also evolved showing that it is a chemical change.
Why might having mud in an ecosystem be important?
Mud can replace producers in an ecosystem.
Pigs love to wallow in mud.
Mud can replace consumers in an ecosystem.
An insect needs mud wallows to breed; that insect pollinates several flowers in that ecosystem.
plsssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssss answer with one of the options
An insect needs mud wallows to breed; that insect pollinates several flowers in that ecosystem.
Having mud in an ecosystem is important because Insects are very important as primary or secondary decomposers in the ecosystem. These insects need mud wallows to breed. That insect pollinates several flowers in that ecosystem.
Why do insects like mud?Muddy sediments recycle organic matter back into nutrients for plant photosynthesis. Butterflies and other insects search for moisture, salt, and other nutrients. It's not just damp patches of soil that draw butterflies. Some are attracted by wet sand and dung.An insect needs mud wallows to breed.How do insects play an important role in the ecosystem?Insects like Bees are some of the most important pollinators in the ecosystem.Without bees, most of the plants we rely on would not be able to produce most of the food we eat.Therefore, the mud in an ecosystem is most important as it provides a place for insects to breed and these insects play a major role in the ecosystem like pollination.
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How many grams of Potassium are in 10 moles of potassium?
Answer:
You can view more details on each measurement unit: molecular weight of Potassium or grams The molecular formula for Potassium is K. The SI base unit for amount of substance is the mole. 1 mole is equal to 1 moles Potassium, or 39.0983 grams.
Explanation:
What is a gas’s temperature in Celsius when it has a volume of 25 L, 203 mol, 143.5 atm?
To Find :
Gas’s temperature in Celsius when it has a volume of 25 L, 203 mol, 143.5 atm .
Solution :
We know, by ideal gas equation :
[tex]PV =nRT\\\\T = \dfrac{PV}{nR}[/tex]
Here, R is universal gas constant and [tex]R = 0.082 \ L \ atm \ mol^{-1} \ K^{1}[/tex]
Putting all given values and R in above equation, we get :
[tex]T = \dfrac{PV}{nR}\\\\T = \dfrac{143.5\times 25}{203 \times 0.082}\ K\\\\T = 215.52\ K[/tex]
Hence, this is the required solution.
where is reverse osmosis used
Answer:
Reverse osmosis systems find frequent use in the following: Boiler feed-water treatment: used to reduce solids content of waters prior to feeding into boilers for power generation or otherwise.
Explanation:
Calculate the mass of oxygen produced when 2000 kg of aluminium oxide is completely electrolysed.
Answer:
Explanation:
Given that:
The mass of aluminium oxide Al₂O₃ = 2000 kg = 2000 000 g
Molar mass of Al₂O₃ = 101.96 g/mol
no of moles = mass / molar mass
no of moles of Al₂O₃ = 2000 000 g/ 101.96 g/mol
no of moles of Al₂O₃ = 19615.4 mol
From the reaction:
4Al + 3O₂ ⇒ Al₂O₃
To determine the moles of O₂ in Al₂O₃:
Then;
19615.4 mol * 3/2 mol of O₂ = 29423.1
The mass of oxygen now = 29423.1 × 32 g
= 941539.2 g
To kg;
= (941539.2 / 1000) kg
= 941.5 kg
Q1 and Q1 represent ?
Answer:yes they do represent
Help! Locks at 12
Given the balanced equation representing a nuclear reaction:
Which particle is represented by X?
Answer is #4 (neutrons)
Explanation:
Total mass before the reaction is 236 amu. The total mass of the two elements is 233 amu. This means that there are 3 amus carried by element X. Looking at the total atomic number of the two elements after reaction, it's 92, the same as the one at the beginning. This means that element X has zero atomic number, which could only be a neutron.
Answer: is 4
Explanation:
I was doing the same one
A mixture of gases with a pressure of 900 mm Hg contains 20% of oxygen and 80% of nitrogen by volumeWhat is the partial pressure of the oxygen gas in the mixture?
A-45mmHg
B-180mmHg
C-210 mmHg
D-320 mmHg
Answer:
180 mmHg
Explanation:
Total volume of gases = 20% + 80%= 100%
Total pressure of gases = 900 mm Hg
Note that partial pressure of a gas = mole fraction × total pressure
Mole fraction of oxygen = 20/100
Hence partial pressure of oxygen= 20/100 × 900 mm Hg
partial pressure of oxygen= 180 mmHg
A haloalkane 'X' if heated with sodium metal in presence of dry ether produces
2,3 - dimethyl butane
as major product
Identify x with chemical reaction.
Answer:
2 halo - propane
Explanation:
We are told that a halo alkane is heated with sodium in the presence of dry ether to produce 2,3 - dimethyl butane.
Now, according to Wurtz reaction this formation from heating with sodium in the presence of dry ether is done by 2 alkyl halides in the form of;
2RX + 2Na → R−R + 2Na+X−
Now, formula for 2,3 dimethyl butane is (CH₃)₂CHCH(CH₃)₂
Thus, from the Wurtz reaction, we can write that;
2RX + 2Na → (CH₃)₂CH - CH(CH₃)₂ + 2Na+X−
So, R = (CH₃)₂CH
This means the original halo alkane has 3 carbon atoms and thus, we can say it is 2 halo - propane.
What are 1A, 3B, and 7A examples of on the periodic table?
groups.
numbers
periods
O rows
Answer: Groups
Explanation:
I took the quiz
Perform the following
mathematical operation, and
report the answer to the
correct number of significant figures.
7.68 x 4.564 = [?]
Answer: The correct number of significant figures in [tex]7.68 \times 4.564[/tex] is 35.05152.
Explanation:
Digits present in a number that helps in determining the degree of accuracy starting from the first non-zero digit is called a significant figure.
Some rules for significant figures are as follows.
All the digits present within the non-zero digits are considered in a number.For example, 2085 contains 4 significant digits.
Leading zeros are not counted in a number.For example, 0.0034 has 2 significant digits.
We count the trailing zeros when a decimal point is present in a number.For example, 0.02500 has 4 significant figures.
When there is no decimal point then trailing zeros may or may not count.For example, 19000 has 2 significant digits.
Now, the product of given digits is as follows.
[tex]7.68 \times 4.564 = 35.05152[/tex]
Thus, we can conclude that correct number of significant figures in [tex]7.68 \times 4.564[/tex] is 35.05152.
NEED HELP!! See picture for question!
Answer: The answer is A.
How many moles are in 50 grams of CO2?
Answer:
The answer is 44.0095. We assume you are converting between grams CO2 and mole.
I hope it help you
Plzzzzzzzzzzzzzzzz can you follow me please
two types of fine chemical
Answer:
Flavors and fragrances
Substances that have a pH
7 are considered acidic.
Answer:
False because pH value below 7 are considered acidic.
Answer:
Any solution that has a pH of less than 7 is considered acidic, and anything above a pH of 7 is basic .
Explanation:
Is 1 mole of Na equal or not equal to Avogadro's number?
Answer:
nooooo it is not equal to it
if 5.0g zinc reacts with 10.0 g hci to produce h2 gas and znci2 according to the following equation zn=2hci znci2 + h2 what is the limiting reactant and how many grams of h2 will be produced
Answer: The mass of [tex]H_2[/tex] produced is 0.153 g
Explanation:
The number of moles is defined as the ratio of the mass of a substance to its molar mass. The equation used is:
[tex]\text{Number of moles}=\frac{\text{Given mass}}{\text{Molar mass}}[/tex] ......(1)
For zinc:Given mass of zinc = 5.0 g
Molar mass of zinc = 65.38 g/mol
Putting values in equation 1, we get:
[tex]\text{Moles of zinc}=\frac{5.0g}{65.38g/mol}=0.0765mol[/tex]
For HCl:Given mass of HCl = 10.0 g
Molar mass of HCl = 36.46 g/mol
Putting values in equation 1, we get:
[tex]\text{Moles of HCl}=\frac{10.0g}{36.46g/mol}=0.274mol[/tex]
The given chemical equation follows:
[tex]Zn+2HCl\rightarrow ZnCl_2+H_2[/tex]
By stoichiometry of the reaction:
If 1 mole of zinc reacts with 2 moles of HCl
So, 0.0765 moles of zinc will react with = [tex]\frac{2}{1}\times 0.0765=0.153mol[/tex] of HCl
As the given amount of HCl is more than the required amount. Thus, it is present in excess and is considered as an excess reagent.
Thus, zinc is considered a limiting reagent because it limits the formation of the product.
By the stoichiometry of the reaction:
If 1 mole of zinc produces 1 mole of [tex]H_2[/tex]
So, 0.0765 moles of zinc will produce = [tex]\frac{1}{1}\times 0.0765=0.0765mol[/tex] of [tex]H_2[/tex]
We know, molar mass of [tex]H_2[/tex] = 2 g/mol
Putting values in above equation, we get:
[tex]\text{Mass of }H_2=(0.0765mol\times 2g/mol)=0.153g[/tex]
Hence, the mass of [tex]H_2[/tex] produced is 0.153 g
Explain why ionic compounds have such high melting and boiling points
