The value of the critical angle for total internal reflection at the water-ice interface is 48.6 degrees.
What is critical angel?The greatest angle at which a beam of light traveling through one transparent media can strike the border between that medium and a second of lower refractive index without being completely reflected within the first medium is called the critical angle in optics.
So the value of the critical angle for total internal reflection at the water-ice interface is 48.6 degrees.
Hence the resultant critical angel is 48.6 degrees.
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How many grams of pbcl2 will be formed from 50. 0ml of a 1. 50m kcl solution?
Mass is the multiplication product of moles and the molar mass. The mass of the lead chloride formed from 1.50 M potassium chloride is 10.42 gm.
What is molarity?The molarity of the solution is the ratio of the moles to the volume of the solution.
The double displacement reaction is shown as,
[tex]\rm 2KCl + Pb(NO_{3})_{2} \rightarrow PbCl_{2} + 2KNO_{3}[/tex]
From the reaction, it can be said that the stoichiometry ratio of potassium chloride and lead chloride is 2:1.
Given,
Molarity of potassium chloride = 1.50 M
1 L of potassium chloride = 1.50 moles
So, 50.0 ml will have,
[tex]\dfrac{1.50 \times 50}{1000} = 0.075\;\rm moles[/tex]
Moles of lead chloride formed will be:
[tex]\begin{aligned} &= \dfrac{1}{2} \times \text{number of KCl moles reacted}\\\\&= \dfrac{0.075}{2}\\\\&= 0.0375\;\rm moles\end{aligned}[/tex]
Given,
Moles of lead chloride = 0.0375 moles
Molar mass of lead chloride = 278 g/mol
Mass of lead chloride is calculated as:
[tex]278 \times 0.0375 = 10.42 \;\rm gm[/tex]
Therefore, 10.42 gm of lead chloride is formed.
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Which one of the following quantities contains the same number of molecules?.
A. 8g O² and 32g SO².
B. 2g H2 and 44g CO².
C. 28g CO and 14g N².
D. 48g O² and 16g O².
Answer:
A.8g O² and 32g SO²
[tex] \bold \pink{Hope \: it \: Helps!}[/tex]
The quantities that contain the same number of molecules would be 2g [tex]H_2[/tex] and 44g [tex]CO_2[/tex].
Number of moleculesAccording to Avogadro, 1 mole different substances contain the same number of molecules.
Thus, the quantities with the same number of moles will be the ones with the same number of molecules.
8g of [tex]O_2[/tex] (molar mass 32) and 32g of [tex]SO_2[/tex] (molar mass, 64) do not equate to the same number of moles.
2g of [tex]H_2[/tex] (2/2 = 1 mole) and 44 g of [tex]CO_2[/tex] (44/44 = 1 mole) have the same number of moles.
28g of CO (molar mass, 28) and 14g of [tex]N_2[/tex] (molar mass 28) do not equate to the same number of moles.
Also, 48 g and 16 g of [tex]O_2[/tex] do not equate to the same mole.
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Chlorine has atomic number 17 and mass number 35. It has:.
Answer:
Chlorine has 18 neutrons.
Explanation:
Mass number = Atomic number + No. of neutrons
No. of neutrons = Mass number - Atomic number
= 35 -17
= 18 Neutrons
K12 how the gene works unit test answer
Answer:
genes are small sections of DNA. These genes contain instructions that tell your cells to make molecules called proteins. And the protein do things to your body to keep you healthy. Genes determine traits as well.
The photograph shows an area where earthquakes have occurred in the past.
How will this location most likely look different after an earthquake?
O A. The lake will drain into the crust of Earth.
OB. One long crack will form and release steam from inside Earth.
OC. The mountain will become a volcano and lava will cover the ground.
O D. The surface of the road will break and cracks will appear in the ground.
Answer:d the surface of the road will break and cracks will appear in the ground :)
Explanation:
PLEASE HELP
If you have 1 mole of H₂O how many moles of H2O you have?
Answer:
2 molecules of hydrogen and 1 molecule of oxygen
Explanation:
The question is unclear, but if you are asking how many molecules are in one molecule of water, it is the answer provided above.
Ocean water tends to be a bit more alkaline than freshwater. what could happen if an ocean absorbs a lot of co2 from the atmosphere?
Answer:
However, carbon dioxide dissolved into the ocean causes seawater to acidify, threatening the ability of shellfish and corals to build their skeletons and affecting the health of other fish and marine species—many that are important to coastal economies and food security.
Explanation:
(4.5x10x10x10x10x10)÷(300)
Answer:
Explanation:
4.5x10x10x10x10x10 can be written as 4.5^5, by the way.
The sum of 4.5^5 is 450,000.
450,000 divided by 300 is 1500.
Hope this helps!
Explanation:
4.5×10×10×10×+0×10=4500000
450000÷300
remove zeros
4500÷3
=1500
Y'all, I need your help, these science questions are due tonight and I'm really stuck , please show work as well
Answer:
Explanation:
a) v=w*lambda
wavelength=5/2.5
wavelength=2m
b)342/320=1.06875m
c)342/1.5=228 Hz
d)4.6153=v/wave
What is the job of the colon?
The colon removes water and some nutrients and electrolytes from partially digested food.
What is colon?All it means is that there's an intimate physical mixture of the specified components in a solid or liquid phase.
The large intestine has 3 primary functions: absorbing water and electrolytes, producing and absorbing vitamins, and forming and propelling faeces toward the rectum for elimination.
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What happens when the compound NaCl is formed?
Sodium transfers an electron to chlorine.
Sodium receives two electrons from chlorine.
Sodium forms an ion with −1 charge and chlorine forms an ion with +1 charge.
Sodium forms an ion with +2 charge and chlorine forms an ion with −2 charge.
During which event is more energy produced compared to other days to turn a turbine? el niño a tsunami during a spring tide during a low tide
A spring tide represents a natural process where more energy is produced when compared to other days in order to turn a turbine.
What do renewable energies mean?A renewable energy can be defined as any source of energy that is reversibly obtained from the nature.
A spring tide can be considered a powerful renewable source capable of generating electricity.In conclusion, a spring tide represents a natural process where more energy is produced compared to other days in order to turn a turbine.
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Answer:
C. during a spring tide
Explanation:
:D
List the measurements required to determine the number of moles of NaOH used in a titration. (Remember: measurements do not include calculated values)
Answer:
naoh + hci-> naci+ h20 me x v1 = me x v2
How much heat must be removed from 456 g of water at 25. 0 c to hcange it into ice at 10 c
The heat required to convert water is given as the product of the mas and the latent heat. 28.34 kJ heat must be removed from the water to change it into ice.
What is heat energy?Heat energy is the product of mass, specific heat capacity, and temperature change. It is given as,
[tex]\rm Q = mc \Delta T[/tex]
Given,
Mass of water = 456 gm
Specific heat capacity = 4.186 J / g K
Temperatutre change = 14.85 K
Substituting values above:
[tex]\begin{aligned} \rm Q &= 456 \times 4.186 \times 14.85\\\\&= 28345.91\;\rm J\\\\&= 28.34\;\rm kJ\end{aligned}[/tex]
Therefore, 28.34 kJ of heat energy should be removed from the water.
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If the collected information showed that the temperature was 10°C and the wind speed was 75 mph, what type of weather would it
probably be outside?
OA. cold and wet
OB. cold and windy
OC. warm and windy
OD. warm and sunny
Answer:
cold and windy
Explanation:
if its 10 degrees outside then it must be cold. then 75 mph that is very windy
Which description correctly characterizes the acidity or basicity of a solution?.
The description that correctly describes the acidity or the basicity of a solution is that:
The higher the pH is, the more the hydroxide ion concentration increases and the more basic the solution becomes.
How is the pH determined?The pH of a solution is determined by the strength of the acid and the base pair. Both of these are dependent on the same chemical reaction.
As the pH rises, the the hydroxide ion is increased in concentration and the solution gets to be more basic.
acidity -the amount of H+ ions can be produced by a compound determines the acidity
pH range:less than 7
acidity increase with decrease in pH number
basicity- the amount of OH- ion can be produced by a compound determines basicity
pH range : 8 to 14
7 is neutral
Basicity increases with increase in number.
Therefore the higher the pH is, the more the hydroxide ion concentration increases and the more basic the solution becomes.
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PLEASE PLEASE HURRY AND HELP WILL MARK
BRANILEST!!! List the controlled variables for this lab. (Correct me if I’m wrong on the one answered PLEASE)
Here you go hope this helps :))
Which object has the greater impact on the tides
The sun
The moon
Jupiter
Mountain ranges
In the balanced molecular equation for the neutralization of sodium hydroxide with sulfuric acid, the products are:
The balanced molecular equation for the neutralization of sodium hydroxide with sulfuric acid is:
Sodium hydroxide + Sulfuric acid → Sodium sulfate +water
What is the balanced molecular equation?A balanced equation is an equation for a chemical reaction in which the number of atoms for each element in the reaction and the total charge is the same for both the reactants and the products. In other words, the mass and the charge are balanced on both sides of the reaction.
In the given reaction, the reactants have been sulfuric acid and sodium hydroxide. Thus, these are written on the left side of the right arrow. The sodium sulfate and water have been the products and written on the right side of the right arrow.
The balanced molecular equation for the neutralization of sodium hydroxide with sulfuric acid is:
Sodium hydroxide + Sulfuric acid → Sodium sulfate +water
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microwave ovens are in almost every home in America. Where would this sentence fit in the vent diagram?
Answer:
Option D
Explanation:
Discovering microwaves would be pure science. Using them in a constructive way would be applied science.
19. Which organic molecule are steroids an example of?
O Proteins
O Carbohydrates
Nucleic acid
Lipids
lipids
Explanation:
steroids belong to the class of of biochemicals called lipids.
Identify parts A-E on the following energy diagram.
Answer:
See below
Explanation:
A Reactants
B Activation energy
C transition state
D enthalpy change
E products
Which of these is not one of the parts of an atom?
electron
A. proton
B. neutron
C. All of these are parts of an atom.
Tysm if you answered
Answer:
All of these are part of an atom.
Suppose you found an unknown substance in a laboratory. It has the formula H2O2 written on the bottle. Is it water? How do you know?
What is the volume of 220g of an object with a density of 55g/cm^3
use dimensional analysis and set up your equation like so:
[tex]=220g\ x\ \frac{cm^3}{55g}[/tex]
the unit grams would cancel which leaves the unit of cm³, which is the unit for volume in this case.
The volume of 220g of an object with a density of 55g/cm³ is 4 cm³.
a real gas is one that
Answer:
A real gas is one that deviates from ideal behavior.
Explanation:
This is due to the effects of gas particles occupying a finite volume.
a 2 L balloon at a pressure of 1 atm ascends to where there is a pressure of 0.27 atm. what is the new volume of the balloon?
Answer:
.135 L
Explanation:
P1V1 = P2V2
1*2=.27*V2
(1*2)/.27 = V2
V2 = .27 ÷ 2 = .135
Determine the number of grams of NaHCO3 that are in one liter of a 2.1 M solution
[tex]\text{Molarity,}~ S= 2.1~mol/L\\\\\text{Molar mas of}~ NaHCO_3, ~M=84~~ g/mol\\\\\text{Volume,}~~ V = 1 ~L\\\\\text{Mass,} ~w = ?[/tex]
[tex]\text{ We know that,}\\\\~~~~~S = \dfrac{n}V\\\\\implies n = SV\\\\\implies \dfrac{w}{M} = SV\\\\\implies w = SVM\\\\\implies w= 2.1 \times 1 \times 84\\\\\implies w =176.4 ~ g[/tex]
Nitrogen fixing bacteria are important to all ecosystems because:
Nitrogen fixing bacteria are important to all ecosystems because they make use of atmospheric nitrogen into biological nitrogen.
Which is nitrogen fixing bacteria?The bacteria Azotobacter, Bacillus, Clostridium, and Klebsiella are examples of this class of nitrogen-fixing bacterium.
Many heterotrophic bacteria survive in soil and fix large amounts of nitrogen without interacting with other organisms.
Amino and nucleic acids (including DNA) and proteins, for example, require nitrogen molecules. Using nitrogen-fixing plants such as pulse or clover in agriculture increases the nitrogen content in the fields and consequently the soil fertility.Hence they are important because they convert the atmospheric nitrogen for the biological use.
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Find the equivalent capacitance between b and c. Express your answer in picofarads
The equivalent capacitance between b and c is 9.2 PF.
What is a capacitor?
A capacitor is a device which store electrical energy in an electric field.
A. capacitor c2 and c3 are in parallel
Cbc = C2 + C3
Cbc = 9.8 + 8.0
Cbc = 18 PF
B. When C1 and Cbc are in series
[tex]\rm Cac = \dfrac{C_1 \times C_b_c}{C_1 + C_b_c} = \dfrac{19 \times 18}{19 + 18 } = 9.24\;PF[/tex]
Thus, the equivalent capacitance between b and c is 9.2 PF.
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