Answer:
The wavelength of this light is 780.4 nm.
Explanation:
Given that,
The frequency of laser light, [tex]f=3.844 \times 10^{14}\ Hz[/tex]
We need to find the wavelength of this light.
We know that,
[tex]c=f\lambda[/tex]
Where
[tex]\lambda[/tex] is the wavelength of light
So,
[tex]\lambda=\dfrac{c}{f}\\\\\lambda=\dfrac{3\times 10^8}{3.844 \times 10^{14}}\\\\=7.804\times 10^{-7}\ m\\\\=780.4\ nm[/tex]
So, the wavelength of this light is 780.4 nm.
What type of conversion is taking place when natural gas is used to heat water?
A. Chemical energy into thermal energy.
B. Thermal energy into mechanical energy.
C. Mechanical energy into electromagnetic energy.
D. Electromagnetic energy into chemical energy.
Answer:
A
Explanation:
I looked it up and this was the answer for your question
A compound consists of 14.6% carbon and 85.4% chlorine by mass. What is its empirical formula?
Answer:
[tex]CCl_{2}[/tex]
Explanation:
When calculating an empirical formula from percentages, assume you have a 100g sample. This allows you to convert the percentages directly to grams, because X % of 100g is X grams.
So:
14.6% C = 14.6g C, 85.4%Cl = 85.4g Cl
The next step is to divide each mass by their molar mass to convert your grams to moles.
14.6g/12.01 = 1.22 mol
85.4g/35.45= 2.41 mol
Then you will divide all of your mol values by the SMALLEST number of moles. This gives you whole numbers that are the mole ratio (subscripts) of the empirical formula.
1.22 mol/1.22 mol = 1
2.41 mol/1.22 mol = 2
So the empirical formula is
[tex]CCl_{2}[/tex]
The empirical formula of the compound is CCl2.
HOW IS EMPIRICAL FORMULA CALCULATED:
Empirical formula of a compound is the smallest ratio of elements contained in that compound. The steps for calculating the empirical formula are as follows:14.6% carbon and 85.4% chlorine by mass means the compound has 14.6g of C and 85.4g of ClFirst, we divide each mass by their respective molar mass:C = 14.6g ÷ 12g/mol = 1.22mol
Cl = 85.4g ÷ 35.5g/mol = 2.41mol
Next, we divide each mole value by the smallest value:C = 1.22mol ÷ 1.22 = 1
Cl = 2.41mol ÷ 1.22 = 1.97
Approximately, the carbon to chlorine ratio is 1:2, hence, the empirical formula of the compound is CCl2.
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EASY SCIENCE QUESTION
Answer:
utcluclult
Explanation:
ciyiclyipc6ycpicyplciplcylpycioiycciptclyltcj"<&%(""%<(
Answer:
no WAYYYYYYY ITS SO EASY!!111!11
Explanation:
A full moon is observed every...
A. 2 weeks.
B. 24 hours.
C. 29.5 days.
D. 365 days
correct=brainliest
Answer:
C
Explanation:
Balance each equation by entering the correct coefficients.
NH3 +
O2 →
NO +
H2O
Balanced equation:
4 NH3 + 5 O2 = 4 NO + 6 H2O
URGENTTTTT What is the correct formula when Al+3 combines with CrO4-2
A. Al2CrO43
B. Al2(CrO4)3
C. Al4(CrO)3
Which two are incorrect and why?
_____ energy has the total amount of
kinetic energy contained in all the
particles of a substance.
A: Thermal
B: Sound
C: Chemical
D: Electric
Answer: Thermal Energy
Explanation:
This question is about iron three of the raw material added to a blast furnace used to extract iron from henatite are coke hematite and limestone name one other raw material added to the blast furnace
Answer: The fourth material that is added to the blast furnace is HOT AIR which provides OXYGEN for used for combustion of carbon (Coke).
Explanation:
Iron is the second most abundant metal found in the earth's crust after aluminium. It is not found in the free metallic state but are extracted from rocks which are rich in iron that contains other materials. These are known are iron ores and the most common iron ores are haematite ( Fe2O3).
Iron can be extracted from its ore with the used of blast furnace. The materials used for extraction of iron includes:
--> Coke
--> haematite( iron ore)
--> limestone and
--> Hot air.
The iron ore is first roasted in air so that iron(III)oxide is produced. The iron(III)oxide is then mixed with coke and limestone and heated to a very high temperature. Hot air is introduced into it from the bottom of the furnace. The coke is oxidizes the the oxygen in the hot air blast to liberate carbondioxide.
Will there ever be grams of a limiting reactant remaining after a reaction has stopped? Why or why not?
Assuming the reaction is complete, there should be no limiting reactant remaining after a reaction. This is because the limiting reactant, by definition, is "the reactant that is completely used up in a reaction."
Can someone help me please
What is the molality of a solution of 0.25 moles of sucrose in dissolved in enough water to make 4.00 liters of water?
Convert 300K to degrees Celsius.
What is the mass of an element with 3 protons and 4 neutrons? Also, how many neutrons are in the nucleus of an atom that has an atomic mass of 36 and atomic number of 25?
A new planet is discovered in a different solar system. The new planet is much like Earth. One difference is that the planet does not have seasons. What can you conclude is one feature of Earth that is
lacking from the new planet?
A.Earth has a tilted axis.
B.Earth has a moon.
C.Earth has a geosphere.
D.Earth has a longer rotational period.
Answer:
the answer is A
Explanation:The earth's spin axis is tilted with respect to its orbital plane. This is what causes the seasons.
I will seriously give all my points to someone who can help me with my science homework page; please. I'm so bad at science
If you can solve both
Will mark brainly
ASAP
Answer:
1. answer is subcutaneous tissue 2. answer is spleen
Explanation:
The subcutis is also known as the hypodermis or subcutaneous layer, and functions as both an insulator, conserving the body's heat, and as a shock-absorber, protecting the inner organs.
Excretory Organs. Organs of excretion include the skin, liver, large intestine, lungs, and kidneys. Together, these organs make up the excretory system.
Answer:
the answer is Subcutaneous Tissue
Explanation:
and the second one is Intestine
Why does a feather fall slower than a rubber ball? How could you make them hit
the ground at the same time?
Answer:
Galileo discovered that objects that are more dense, or have more mass, fall at a faster rate than less dense objects, due to this air resistance. A feather and a rubber ball dropped together. Air resistance causes the feather to fall more slowly, while the ball falls more fast.
HELP ASAP PLEASE 2H2+ O2 =2H2O, how many moles of water is produced if there is 10gm of O2 gas used?
Answer:
6.25 x 10^-4 moles H2O
Explanation:
moles H2O = 10 x 10^-3 g O2 x (1 mol O2/MM O2) x (2 moles H2O/ 1 mol O2) =
= (10^-2 / 32) x 2 = 6.25 x 10^-4 moles H2O
conversion factor 2moles H2O = 1 mol O2
MM O2 = 32g/mol
mass O2 = 10 mg = 10 x 10^-3 g
Which of the following is a chemical property of water at 4°C?
its temperature
its color
its ability to decompose into hydrogen and oxygen
its state
Answer:
At 4°C what is not able to decompose into hydrogen and oxygen chemical changes cannot be reverted, in this case it can. It will not change color, because water is always clear, and won't at this state turn into ice. though it can be reverted.
Explanation:
I hope that is correct that's all I've learned so far!
Answer:
A) Its temperature
Explanation:
Which statement describes how snow is formed?
Answer:Snow in the atmosphere. Once snow crystals form in the atmosphere, they grow by absorbing surrounding water droplets. The snowflakes we end up seeing on the ground are an accumulation of these ice crystals.
Explanation:
Answer: Snow is defined as wet if there's a presence of water. within the context of snow formation, "dry" and "wet" don't seem to be used literally. Instead, they're wont to provide a distinction supported how each kind of snow is created and therefore the resulting property of either type. When the snowflakes are formed within the atmosphere, gravity takes over. Explanation: Because there were no statements I had to show the definition instead I hope this helped you to find your answer
Explain the role light plays on the rate
of photosynthesis.
Answer:
The process of photosynthesis occurs when green plants use the energy of light to convert carbon dioxide (CO2) and water (H2O) into carbohydrates. Light energy is absorbed by chlorophyll, a photosynthetic pigment of the plant, while air containing carbon dioxide and oxygen enters the plant through the leaf stomata.
5. ? is not a changing process in metal smelting.
A. Iron smelting in a furnace
B. Heating iron in oxygen
C. Metal oxide reacting with coke at high temperature
D. Carbon monoxide reducing metal oxide at high temperature.
What gives a pant cell a rigid shape?
A: Chloroplast
B: Vacuole
C: Cell wall
D: Cell membrane
Help me please
Extra points & brainlest
Answer:
Cell Wall
Explanation:
In plant cells, the cell wall is rigid the outer structure that protects the plant cell.
In this lab, you will use a precise scale and heat to identify the mole ratio of an unidentified hydrate. Write an investigative question that you can answer by doing this experiment.
Answer:
How can drying a hydrate help you determine its mole ratio of water to salt?
Explanation:
When we are investigating the mole ratio of a hydrate by heating we can have some scientific questions to solve here, like how much heat energy is needed to dry the hydrate of specified quantity, similarly how the evaporation helps to determine the mole ratio?
What are hydrates?Some compounds easily absorbs water molecules into them and forms hydrates that are compounds associated with water molecules. The property getting moisture easily is called deliquescence.
There are many compounds which able to form hexahydrates, penta hydrates, dihydrates etc. The mole ratio with water depends on the nature of the compound and mostly to the bond type.
By heating the hydrates can be dried by evaporation of water. But the temperature used to evaporate varies with the water content. Thus, question we can have here, is how heating helps to find mole ratio and how heat energy is used to make it dry.
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What is radiation exactly
radiation is energy that comes from a source. (travels through the speed of light)
Which best describes the relationship between the circulatory system and the respiratory system?
The circulatory system is the transport system for the respiratory system.
The respiratory system is the transport system for the circulatory system.
The circulatory system diffuses red blood cells into the respiratory system to pick up oxygen.
The respiratory system transfers hemoglobin to the red blood cells of the circulatory system.
Answer:
its a
Explanation:
yw
The respiratory and circulatory systems work together to maintain the homeostasis of the human body. The circulatory system is the transport system for the respiratory system. The correct option is A.
What is respiratory system?The network of organs and tissues which help us to breathe is defined as the human respiratory system. The main function of this system is to introduce oxygen into the body and to expel carbon dioxide from the body.
The human circulatory system consisting of arteries, veins and capillaries provide all the essential nutrients, minerals and hormones to the various parts of the body.
The respiratory system does not work alone in transporting oxygen through the body. The oxygen taken in from the respiratory system moves into blood vessels that then circulate oxygen rich blood to tissues and cells.
Thus the correct option is A.
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What is the mass of a 5.00 cm^3 piece of copper having a density of 8.96 g/cm^3
Answer:
44.8 g
Explanation:
Density = mass / Volume
Mass = density x Volume = 8.96x 5 = 44.8 g
Answer these questions to get marked as a BRAINLIEST!!!!
Answer:
c
Explanation:
Answer:
I think ur answer would be C.)
Explanation:
hope this helps <3
A sample of helium gas has a volume of 620. Ml at a temp of 500 K. If we decrease the temperature to 100K while keeping the pressure constant what will the new volume be?
Answer:
A sample of helium gas has a volume of 620mL at a temperature of 500 K. If we ... to 100 K while keeping the pressure constant, what will the new volume be?
Explanation:
A sample of helium gas has a volume of 620. Ml at a temp of 500 K. If we decrease the temperature to 100K while keeping the pressure constant 124 ml will the new volume be.
What is volume ?Volume is a measurement of three-dimensional space that is occupied. It is frequently expressed quantitatively using SI-derived units, as well as several imperial or US-standard units. Volume and the notion of length are connected.
The capacity of an object is measured by its volume. For instance, a cup's capacity is stated to be 100 ml if it can hold 100 ml of water in its brim. The quantity of space occupied by a three-dimensional object can also be used to describe volume.
According to Charles' Law, at constant pressure,
V1 / T1 = V2 / T2
V1 = 620 ml and T1 = 500K, V2 = ? , T2 = 100K
620 ml / 500K = V2 / 100K
V2 = ( 620 ml ) ( 100K ) / 500K
Volume = 124 ml
Thus, If we decrease the temperature to 100K while keeping the pressure constant 124 ml will the new volume be.
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The surface temperature of a white dwarf is higher than a red supergiant. True or False
Answer:
True.
Explanation: