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Related Questions
The surface temperature of a white dwarf is higher than a red supergiant. True or False
Answers
Answer:
True.
Explanation:
Answer these questions to get marked as a BRAINLIEST!!!!
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Answer:
c
Explanation:
Answer:
I think ur answer would be C.)
Explanation:
hope this helps <3
A compound consists of 14.6% carbon and 85.4% chlorine by mass. What is its empirical formula?
Answers
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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_____ energy has the total amount of
kinetic energy contained in all the
particles of a substance.
A: Thermal
B: Sound
C: Chemical
D: Electric
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Answer: Thermal Energy
Explanation:
If you can solve both
Will mark brainly
ASAP
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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
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.
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Answer:
A
Explanation:
I looked it up and this was the answer for your question
A.) chemical energy into thermal energy.
Which statement describes how snow is formed?
Answers
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
What gives a pant cell a rigid shape?
A: Chloroplast
B: Vacuole
C: Cell wall
D: Cell membrane
Help me please
Extra points & brainlest
Answers
Answer:
Cell Wall
Explanation:
In plant cells, the cell wall is rigid the outer structure that protects the plant cell.
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.
Answers
A balance and a graduated cylinder are used to determine the density of a mineral sample.
The sample was measured on the balance at 15.4 g.
The graduated cylinder began with 20 mL of water and measured 22.8 mL of water after the sample was placed into the graduated cylinder.
Density = mass / volume
What is the density of the mineral sample?
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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
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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.
Can someone help me please
Answers
What is radiation exactly
Answers
radiation is energy that comes from a source. (travels through the speed of light)
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
Answers
Will there ever be grams of a limiting reactant remaining after a reaction has stopped? Why or why not?
Answers
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."
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?
Answers
In the reaction 2 H2 + O2 + 2 H20 what is the coefficient of oxygen?
Answers
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
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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:
EASY SCIENCE QUESTION
Answers
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
Answers
Answer:
C
Explanation:
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?
Answers
Convert 300K to degrees Celsius.
Answers
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.
Answers
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.
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.
Answers
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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Balance each equation by entering the correct coefficients.
NH3 +
O2 →
NO +
H2O
Answers
Balanced equation:
4 NH3 + 5 O2 = 4 NO + 6 H2O
Explain the role light plays on the rate
of photosynthesis.
Answers
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.
What is the mass of a 5.00 cm^3 piece of copper having a density of 8.96 g/cm^3
Answers
Answer:
44.8 g
Explanation:
Density = mass / Volume
Mass = density x Volume = 8.96x 5 = 44.8 g
if you had to explain to a friend how to balance a chemical equation, what
would you say to them?
Answers
Answer:
make sure that the number of atoms on the left side of the equation equals the number of atoms on the right.
Explanation:
A chemical reaction can be balanced by multiplying each side with suitable integers such that the number of each element in the reaction must be equal number on both side.
What is a balanced chemical equation?According to the law of conservation of mass for a chemical reaction, the total mass in the reactant side is equal to the total mass in the product side. Thus, a balanced chemical equation represents the perfect stoichiometry for each reactants and products.
The number of each elements in both side have to be equal in number. If they are unequal on both side, we can balance the reaction by multiplying with suitable integers.
Lets have one example. Consider the given reaction.
[tex]\rm CH_{4} + O_{2} \rightarrow H_{2}O + CO_{2}[/tex]
Here, 4 H are in left side and only 2 in right side. Similarly number of oxygen also not balanced.
The balanced equation requires a coefficient of 2 for water and 2 for oxygen in reactant thus, it can be written as:
[tex]\rm CH_{4} + 2O_{2} \rightarrow 2H_{2}O + CO_{2}[/tex]
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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?
Answers
HELP ASAP PLEASE 2H2+ O2 =2H2O, how many moles of water is produced if there is 10gm of O2 gas used?
Answers
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