The correct option for the given question about Harmfull effect of UV light is Option D) Reactant.
Why UV light is so harmfull for some vitamins?In general, temperature, oxygen, and light impacts on vitamins and minerals are sensitive. A nutrient can lose its biological potency if its molecular structure is slightly altered.Numerous vitamins, including vitamin A, vitamin B2 (riboflavin), vitamin B6, vitamin B12, and folic acid, are known to be particularly susceptible to UV radiation oxidation.Additionally, light speeds up the negative interactions between vitamins.For instance, the combination of riboflavin and light together speeds up the breakdown of both folic acid and vitamin C. This is what causes milk that has been exposed to light to lose vitamin C.Thus to conclude we can say that UV light damages some vitamins by reacting with them.
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Pt3 science......
Select correct answer ♡ !
Answer:
Neon
(if you want a thorough explanaion, just ask for one)
It is C! <3
The reason it's C because pt3 is Sugar science name get it?
Predict what happens when tin metal is placed into
a solution of nickel(II) iodide.
A. Tin(II) iodide forms
B. Tin metal dissolves
C. Nothing
D. Both a and b happen
E. Nickel is plated onto tin
Answer:
I would say A but I'm not sure
When tin metal is placed into a solution of nickel (II) iodide then nothing will occur.
What is reactivity series?Reactivity series of the metals tells about the increasing or decreasing orders of the reactivity of the metals.
According to the reactivity series, reactivity of nickel metal is more than the tin metal. So, if we add tin metal in the solution of nickel (II) iodide then no reaction occurs. Because the reactivity of tin is less as compare to nickel metal so it is not possible for tin to replace the nickel metal and get dissolve.
Hence, option (C) is correct i.e. nothing.
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Can someone help me ❤️❤️❤️
Answer:
i think the answer would be C
Explanation:
no matter what you do to the jar the mass will stay the same. unless you add more nails
Match each scientist to their discovery regarding the atom
Thomson
Electrons have a charge of -1.
Rutherford
Atoms are indivisible
Millikan
Atoms have a positive nucleus
Dalton
Atoms contain electrons.
Answer:
Thomson--atoms cotain electron
Ernest Rutherford--atoms have a positive nucleus
R.A Millikan--electrons have Q=-1
Dalton--atoms are indivisible
Millikan---> Electrons have a charge of -1
Rutherford ---> Atoms have a positive nucleus
Thomson -----> Atoms contain electrons
Dalton --------> Atoms are indivisible
The atomic theory went through several modifications and different scientists proposed various models of the atom until our present conception of the atom was developed.
The atom was first defined as the smallest indivisible particle of a substance. This idea of "indivisibility" of the atom stems from Dalton's theory.
The fact that atoms were composed of negatively charged electrons was proven by the experiments of J.J Thompson using the cathode ray tube. Millikan's charge to mass experiment showed that the electron has a charge of -1.
Rutherford, in his famous gold foil experiment showed that atoms were composed of a positively charged nucleus.
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HURRY WILL GIVE BRAINLIETS How are proteins and nucleic acids related? They both provide energy. They both carry genetic information. The structure of proteins is determined by nucleic acids. The subunits of nucleic acids are also the subunits of proteins.
Answer: the answer is “C”
Explanation:
Took the T E S T
A building is found to be losing heat to the outside during the winter months. Which would be the best solution to correct this design problem?
increase amount of heating
increase surface area of walls
increase number of windows
increase thickness of insulation
no link or I will report
Answer:
increase thickness of insulation
Explanation:
don't increase amount of heating because that's difficult and not efficient.
don't increase surface area of walls because that makes heat be lost quicker.
don't increase windows because windows lose heat worse than walls.
increase thickness of insulation because it's the most effiecient and effective method of keeping heat.
For the reaction represented by the equation:
Cl2 + 2KBr → Br2 + 2KCl
how many grams of KCl can be produced from 356 grams KBr?
Answer:
223 g KCl
General Formulas and Concepts:
Atomic Structure
Reading a Periodic TableMolesStoichiometry
Using Dimensional AnalysisAnalyzing reactions RxNExplanation:
Step 1: Define
[RxN - Balanced] Cl₂ + 2KBr → Br₂ + 2KCl
[Given] 356 gg KBr
[Solve] g KCl
Step 2: Identify Conversions
[RxN] 2 mol KBr → 2 mol KCl
[PT] Molar Mass of K - 39.10 g/mol
[PT] Molar Mass of Br - 79.90 g/mol
[PT] Molar Mass of Cl - 35.45 g/mol
Molar Mass of KBr - 39.10 + 79.90 = 119 g/mol
Molar Mass of KCl - 39.10 + 35.45 = 74.55 g/mol
Step 3: Stoichiometry
[DA] Set up conversion: [tex]\displaystyle 356 \ g \ KBr(\frac{1 \ mol \ KBr}{119 \ g \ KBr})(\frac{2 \ mol \ KCl}{2 \ mol \ KBr})(\frac{74.55 \ g \ KCl}{1 \ mol \ KCl})[/tex][DA] Divide/Multiply [Cancel out units]: [tex]\displaystyle 223.024 \ g \ KCl[/tex]Step 4: Check
Follow sig fig rules and round. We are given 3 sig figs.
223.024 g KCl ≈ 223 g KCl
This gland of the endocrine and digestive systems produces insulin to help control the body's sugar levels and enzymes which aid in digestion.
Answer:
Pancreas.
Explanation:
Living systems are self-organized life forms and are known to be very much interactive with their surroundings or environment. Also, living systems are dependent on the flow of information, matter and energy at various levels.
Some examples of living systems in organisms are respiratory system, nervous system, digestive system, and circulatory system.
Additionally, living systems comprises of the following components; cells, organs, muscle, tissues, blood, etc.
An endocrine system refers to a series of ductless glands and organs responsible for the production and secretion of hormones that are used by the body for the performance of various functions such as metabolism, controlling growth, reproduction, mood, sleep, etc. These hormones are secreted directly into the circulatory system (blood) and then transported to the organs and tissues in the body.
Pancreas is one of the glands of the endocrine and digestive systems that produces insulin to help control the body's sugar levels and enzymes which aid in digestion.
Calculate the concentration imports per million ppm of DDT if a sample size of 5000 g contained 0.10 g DDT
Answer:
20ppm
Explanation:
parts per million are defined as the mass of solute in mg (In this case, mass of DDT) per kg of sample.
To solve this question we must find the mass of DDT in mg and the mass of sample in kg:
Mass DDT:
0.10g * (1000mg / 1g) = 100mg
Mass sample:
5000g * (1kg / 1000g) = 5kg
Parts per Million:
100mg / 5kg =
20ppmHELP ASAP 10 POINTS
What type of interference caused a "super crest" to form during Young's experiment?
Constructive interference
Doppler interference
Destructive interference
Operational Interference
Answer:
the answer is destructive interference
9. Which indicator would show a pH change from 6 to 7?
Phenol red indicator
Blue litmus indicator
Red litmus indicator
Methyl red indicator
Will give brainliest!!!!
Answer:
hi
Explanation:
because
What is the volume of solution if 2.0 moles of 0.4 M HF are present in the solution?
Answer:
5 L
Explanation:
Molarity = mol/L ----> L = mol/molarity
2.0 moles / 0.4 M HF = 5 L
65 g of NaOH is dissolved to make 500 mL of solution. Find moles of NaPH and Molarity of solution.
Answer:
3.25 M
Explanation:
Number of moles = mass/ molar mass
mass of NaOH = 65 g
Molar mass of NaOH = 40 g/mol
Number of moles of NaOH = 65g/40 g/mol = 1.625 moles
Let us recall that;
n = CV
n = number of moles of solute
C = concentration of solution
V = volume of solution
C = n/V
n = 1.625 moles
V = 500/1000 L = 0.5 L
C = 1.625 moles/0.5
C = 3.25 M
In your own words, describe the difference between Thermal Energy and Heat.
Answer:
Heat is the flow of thermal energy between two objects of different temperature whereas the thermal energy tells about how much is the transfer of energy due to temperature difference between two bodies. Hence thermal energy in transit gives heat
What gas in the air is used by plants to make their own food? (2 points)
Nitrogen
Water vapor
Carbon dioxide
Oxygen
Answer:
Carbon Dioxide
Explanation:
Carbon dioxide gets turned into oxygen
How much heat, in kJ, is released when 6 mol of water at 0°C freezes to ice at 0°C if ΔHsolid for water = –6.01 kJ/mol?
Answer:
12.3 kJ
Explanation:
For a given substance, the molar heat of fusion basically tells you one thing from two perspectives
how much heat is needed in order to melt one mole of that substance at its melting point
how much heat must be removed in order to freeze one mole of that substance at its freezing point
It is very important to realize that the molar enthalpy of fusion will carry a positive sign when you're dealing with melting and a negative sign when you're dealing with freezing.
PLZ HELP! QUESTION IS BELOW! :D
Answer:
Explanation:
When we say anything is a wave, what exactly do we mean? The most intuitive and straightforward wave to envision is a water wave. A motion, more specifically, is a disturbance that propagates or travels away from its source. Water waves are caused by a disruption in the water's surface, such as a rock tossed into a pond or a swimmer splashing the surface continuously. The noise for sound waves is a rise of air pressure, which may be caused by the oscillating cone within a speaker. There are many kinds of disturbances in earthquakes, including surface disturbances and pressure disturbances under the surface. Even radio signals are best deciphered by using a comparison of sea waves Water waves are helpful to visualize since they are more than just a mental picture. The amplitude, period, frequency, and energy of water waves are all the same as they are for all waves. A small set of underlying principles can be used to describe all wave characteristics.
(hope this helps can i plz have brainlist :D hehe)
How many moles of mercury(II) oxide, HgO, are needed to produce 125 g of oxygen, O2? How many moles of mercury is produced?
Laughing gas (nitrous oxide, N2O) is sometimes used as an anesthetic in dentistry. It is produced when ammonium nitrate is decomposed according to the following reaction.
NH4NO3(s) ---> N2O(g) + H2O(l) How many grams of NH4NO3 are required to produce 33.0 g N2O? and How many grams of water are produced in this reaction?
Answer: 7.81 mol HgO (How many moles of mercury(II) oxide, HgO, are needed to produce 125 g of oxygen, O2?)
Explanation:
Which of the following is true about limiting and excess reagents?
Links are reported
Answer:
the first one
Explanation:
I take this subject
All of the following contribute to the evolution of a species EXCEPT -
O Respiration
O Adaptations
O Mutations
ONatural selection
Answer:
Respiration
Explanation:
Respiration is the system of how an animal breathes
4. How many molecules are equal to 2.25 moles of sulfur dioxide?
5. How many moles are equal to 2.4 x 1023 particles of sodium chloride?
Answer: 4. We know that one mole of any chemical compound always contains 6.022 x 10^23 molecules. Therefore, we can calculate the number of molecules of 2.25 moles of sulfur dioxide SO2 by multiplying the number of moles by the Avogadro's constant 6.022 x 10^23:
2.25 moles SO2 (6.022x10^23 molecules/1mole) = 1.355 x 10^24 molecules of sulfur dioxide
5. The number of moles of sodium chloride are 0.40 moles
Explanation:
The weight of the elephant is 4500 kg, and the area of the sole of one of its legs is 1700 cm2. Calculate the pressure of the elephant on the ground.
Answer:
64852.94 N/m²
Explanation:
From the question,
P = F/A.................... Equation 1
Where P = Pressure of the Elephant on the ground, F = Weight of the Elephant, A = Area of the sole of the four legs.
But,
F = mg.............. Equation 2
Where m = mass of the elephant, g = acceleration due to gravity
Substitute equation 2 into equation 1
P = mg/A............ Equation 3
Given: m = 4500 kg, A = (1700×4) cm² ( The elephant has four legs) = 6800 cm² = 0.68 m²
Constant; g = 9.8 m/s²
Substitute these values into equation 3
P = (4500×9.8)/0.68
P = 64852.94 N/m²
Larissa is making sautéed purple cabbage. First, she washes and cuts the cabbage into long thin strands. Then, she puts a
pan on the stove and adds butter. She allows the butter to melt and turn to liquid. Next, she adds the cabbage to the butter
sprinkles some salt on it, and stirs it. Larissa watches as the cabbage sizzles, releases steam, and softens. To finish the side
dish, she adds a squeeze of lemon juice to it, which causes it to change from purple to pink. Finally, Larissa empties the
cabbage into a bowl and puts it on the dinner table.
Which of the events involves a chemical reaction?
O Larissa adds butter to a pan and allows it to melt and turn to liquid.
O Larissa adds a squeeze of lemon juice to the cabbage, and it turns pink.
O Larissa watches as the cabbage sizzles, releases steam, and softens.
O Larissa washes and cuts some purple cabbage into long thin strands.
O Larissa empties the cabbage into a bowl and puts it on the dinner table.
O Larissa adds the cabbage to the butter with a sprinkle of salt and stirs it.
Answer:
When she adds lemon juice
Explanation:
I believe that it is when she adds lemon juice. Lemon juice is an acid, which causes a chemical reaction. It turns from purple to pink because of the acid. Lmk if it's right but I'm 99.9% percent certain it is correct.
Pls help! DO NOT GIVE ME A LINK AS AN ANSWER!
Recall the equation M, V1 = M2V2. Based on the presence of this amount of copper sulfate, complete the table to predict the concentration of the solution as water is added to the tank or removed from it. Don't actually change the amount of water in the tank yet. Type the correct answer in each box. Use numerals instead of words. Express each answer to two significant figures e. Volume (L) Concentration (mol/l) 1.0 0.80 0.60 0.50 0.20
Answer:
(top to bottom)
0.50
0.63
0.83
1.0
1.3
2.5
Explanation:
Answer: Answers are from top to bottom (Edmentum)
0.50
0.63
0.83
1.0
1.3
2.5
Explanation:
Write a balanced equation for each reaction. KOH(aq) + H3PO4,(aq)
Answer:
3 KOH(aq) + H3PO4(aq) = K3PO4(aq) + 3 H2O
Explanation:
A piece of metal is composed of atoms. Each atom in the metal contains 29 protons. How is the metal classified?
Answer:
Explanation:
The metal is classified as a transition metal or transition element. In particular, this atom is Copper it has an atomic number of 29 which we know by the number of protons. The number of protons in an atom is the same as the atomic number.
Answer:
Copper
Explanation:
Each atom in the metal contains 29 protons.
Dos objetos presentan fuerzas eléctricas repulsivas entre sí. ¿Cómo pueden ser las cargas eléctricas de estos objetos?
Answer:
Las cargas eléctricas de los objetos son ambas positivas o son ambas negativas.
Explanation:
Si dos objetos presentan fuerzas eléctricas repulsivas entre sí, quiere decir que ambos tienen el mismo tipo de carga.
Las cargas iguales (positivo con positivo, o negativo con negativo) se repelen, mientras que las cargas diferentes (positivo con negativo) se atraen.
1
The table gives the composition of three particles
particle
number of
protons
number of
electrons
number of
neutrons
А
15
16
B
15
16
с
15
17
(a) What is the evidence in the table for each of the following?
(i) Particle A is an atom.
(ii) A, B and C are all particles of the same element
Answer:
the answer is wurkey churkey since the birdy is really really cute
Explanation:
if the birdy was not squishy then it would have died already?!?!?
How many atoms of each element are present in methane
and propane based on their chemical formulas
Answer:
Methane has one atom of carbon and four atoms of hydrogen.
Propane has three carbon atoms and eight atoms of hydrogen.
Why do you think the same color M&M was used in each sample of water?
Answer:
The candy coating is made up of coloring and sugar. The coloring and the sugar molecules both have positive and negative charges on them. The water molecule has positive and negative charges so it can attract and dissolve the color and sugar pretty well.
Explanation:
go to https://www.acs.org/content/acs/en/education/whatischemistry/adventures-in-chemistry/experiments/dissolving-m-ms.html#:~:text=The%20candy%20coating%20is%20made,color%20and%20sugar%20pretty%20well.