Answer:
Avogadro's Number
Explanation:
6.02 x 10²³ is the number of units it 1 mole.
6.02 x 10 ²³ is known as Avogadro's number
I need help with this whoever helps will get a surprise
Answer:
wish it helps anything else comment at my answer
It takes 78.2 J of energy to raise the temperature of 45.6g of lead by 13 degrees celsius. What is the specific heat of lead?
Pls Help!!!!
Answer:
Q = mcΔt but this time rearrange to find for c
Explanation:
Q or energy = 78.2J
mass of lead = 45.6g
Specific heat capacity of lead = ????
Δt = 13°C
Q = mcΔt
Rearrange the equation to find for c
c = Q / m x Δt
c = (78.2) / (45.6) x (13)
c ≈ 0.132 J °C
How to Separate Iodine and sulfur by technique of saparation
A mixture of iodine and sulphur can be separated by adding Carbon disulphide that is (CS₂) then stir the solution and filter it . As sulphur dissolved in CS₂, so it come into filter and got separated from the mixture.
38. Assuming a sample mixture made from sand and sugar had a mass of 53.5 g, and
it was separated using decantation and boiling to remove the water used in the
separation procedure, what is the mass percent of sugar in the sample assuming 35.2
g of sugar was recovered, and 16.0 g of sand was recovered?
A.66%sugar
B.4%sugar
C.30%sugar
39. Using the information from question 38 what is the total percent recovery for the separation? Is the percent recovery greater than less than 100% why might this be the case?
The Mass percent of sugar in the sample was 66% while the Total percent recovery is 95.7%
Equation
An equation is an expression used to show the relationship between two or more variables and numbers.
Given the sample had a mass of 53.5g, hence:
Mass percent of sugar in the sample = (35.2/53.5) * 100% = 66%
Total percent recovery = [(35.2 + 16)/ 53.5] * 100% = 95.7%
The Mass percent of sugar in the sample was 66% while the Total percent recovery is 95.7%
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what is the symbol of the periodic table for aluminum
Answer:
Al
Explanation:
Al = Aluminum
What is the volume, in liters, of
1.50 mol Cl, at STP?
STP signifies standard temperature and pressure. These conditions are at 1 atmospheric pressure and 0 degrees Celsus, It has been said that at these conditions, one mole of a gas molecule is 22.4 liters of volume.
1.50 mol Cl2( 22.4 L / mol) = 33.6 L Cl2
Chemical bonds __________.
a. take a long time to break.
b. are energy relationships between the electrons of the reacting atoms.
c. are energy relationships between the protons of the reacting atoms.
d. are physical structures that hold atoms together.
Answer:
c. are energy relationships between the protons of the reacting atoms.
Explanation:
Is melting an ice cube a physical or chemical change.
Chloroform (CHCl3), an important solvent, is produced by a reaction between methane and chlorine.
CH4(g) + 3 Cl2(g) CHCl3(g) + 3 HCl(g)
How many grams of CH4 is needed to produce 56.0 g CHCl3?
Why does metal expand when heated?
Answer:
Metal expands when heated. Length, surface area and volume will increase with temperature. ... Thermal expansion occurs because heat increases the vibrations of the atoms in the metal
Explanation:
hope this help :)
Answer:
Length, surface area and volume will increase with temperature.
Explanation:
Metal expands when heated. Length, surface area and volume will increase with temperature. ... Thermal expansion occurs because heat increases the vibrations of the atoms in the metal
Power gathered from the sun and wind?
A
is considered a nonrenewable resource.
B
can provide humans with energy forever.
C
can only be used in the daytime.
D
is not a natural resource.
30 points
Your answer is B
Sun and wind are considered renewable energy, meaning that it won't polute the Earth. And as far as I know, the Sun and wind can't really run out. So it can last a very long time!
Hope this helps!
-Daisuke
What is the difference between heavy cream and heavy whipping cream?.
Answer: The main difference between the two is their fat content. Heavy cream has slightly more fat than whipping cream. Otherwise, they are nutritionally very similar. You can use them interchangeably in recipes without affecting the taste, although they may lead to different consistencies.
Explanation:
how many moles of AI are necessary to produce 5.92 miles of hydrogen gas
Answer:
ok
Explanation:
why I needed to give a answer to a question. I want to ask the question. brainly solve this issue. i cant ask questions without answering to 1 questions.
Molecules at a higher temperature have _______ kinetic energy, speed, and momentum compared to molecules at a lower temperature.
Answer:
Molecules at a higher temperature have higher/more kinetic energy, speed, and momentum compared to molecules at a lower temperature.
Explanation:
Delaney is putting together a motor for her
science project. She needs a material that
conducts electricity for the circuits and a
material that does not conduct electricity for insulators
Answer:
40. B
41. B
Explanation:
Copper is a good insulator and conducts electricity.
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What is the relationship between absorbance and transmittance of a sample in a spectrophotometer?
- indirect
- Direct
- No relationship
Plz help!!
Which statement about Niels Bohr’s atomic model is true?
Answer:
I believe your answer is B. Each orbit has a specific energy level.
Hope this helped!
2 Explain why the reaction between aluminum and iron oxide is useful in the railway industry.
Answer:
Sometimes, it is necessary to produce a small amount of iron more quickly, for example if railway workers need to produce molten metal to fix a broken rail.
Explanation:
The thermite reaction uses aluminium powder and iron (III) oxide. When ignited, the mixture reacts vigorously because of the large difference in reactivity between aluminium and iron.
The aluminum can create more durable bonds with oxygen than it can with hydrogen. Since a lot of heat is produced throughout the entire reaction, molten iron that may be used to link railroad tracks is produced as a result of the reaction.
What is aluminum ?Chemical element aluminum has the atomic number 13 and the symbol Al. Aluminum has a density that is around one third that of steel, which is lower than that of most common metals. It has a strong affinity for oxygen, and when exposed to air, creates a protective oxide coating on the surface.
Aluminum (Al) and iron(III) oxide (Fe2O3) react to generate aluminum oxide (Al2O3) and molten iron (Fe). Aluminum displaces iron in iron(III)oxide to generate aluminum oxide in what is known as a displacement reaction.
Iron oxide and aluminum are used to repair machine parts that have cracks or serve as railing on railroad tracks. Thermite reaction is the name given to this process.
Thus, The aluminum can create more durable bonds with oxygen than it can with hydrogen.
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Calculate the mass of 3.00 moles of SeBr2
When solving net force problems, arrows going opposite directions means you subtract the Newtons.
True
or false
It's actually true hope it helps.
True or False: Increasing the amplitude
changes the wavelength.
Answer:
False
Explanation:
Amplitude does not affect wavelength
LAST ATTEMPT PLS HELP!!!
What is the correct skeleton equation for the following reaction?
iron + oxygen --> iron(III) oxide
Fe +O—> FeO
Fe + O2 —> FeO2
Fe+ O2 —> Fe₂O₃
Fe + O —> Fe₂O₃
Fe +O2 =Fe2O3 is correct !
A large hamburger sandwich contains 628 kcal and 36 grams of fat. Approximately what percentage of the total energy is contributed by fat
The percentage of the total energy contributed by fat = 51.59% of fat
Calculation of total energy in fatThe quantity of fat in the hamburger = 36grams
But 1 gram of fat = 9 kcal( standard energy value per gram of fat).
That is , 9kcal = 1 gram
X kcal = 36 grams
cross multiply,
X kcal = 9 × 36
= 324kcal
To calculate the percentage of 324kcal of fat in 628 kcal,
[tex]\% = \frac{324}{628} \times \frac{100}{1} [/tex]
[tex]\% = \frac{32400}{628} [/tex]
% = 51.59% of fat
The percentage of the total energy contributed by fat = 51.59%
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what effect does dilute ethanoic acid have on red litmus paper
Answer:
As ethanoic acid is basically a acid
it will turn blue litmus red and on a red litmus paper
there will be no effect
In Florida, the beaches are often exposed to hurricanes originating in the Atlantic Ocean. Which of the following is the most reasonable prediction of what could result from a hurricane?
OPTIONS
Creating of new rivers at high elevations
Movement of sand from the beach to offshore sandbars
The generation of local earthquakes after the storm
The creating of new river deltas along the beaches
Answer:
who's asking?
Explanation:
What is the difference between Speed and Velocity?
Which consumers are cornivores
Answer:
Carnivores and omnivores are secondary consumers. Many carnivores eat herbivores. Some eat omnivores, and some eat other carnivores. Carnivores that consume other carnivores are called tertiary consumers.
E.g
Felines, ranging from domestic cats to lions, tigers, and other large predators.
Some canines, such as the Gray Wolf
Hyenas.
ferrets.
Polar Bears.
Pinnipeds ( seals, sea lions, walruses, etc.)
Birds of prey, including hawks, eagles, falcons, and owls.
What type of bond holds the complementary bases together?.
Answer:
hydrogen bonding
Explanation:
The two strands of DNA are held together by hydrogen bonds between complimentary nucleotides.
What is the name of Cu4C?
Answer: Copper (I) Carbide
Explanation:
Copper is a polyatomic ion, meaning it has multiple charges. Carbon has an outer shell consisting of 4 valence electrons so it can either add or lose 4 electrons so it’s charge can be -4 or +4. As said Copper has multiple charges but they are positive, so in this case Cu4 would be 4 +1 charges compared to C which would be -4. Therefore this is a 4:1 ratio, meaning Cu4C is Copper (I) Carbide
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