Oxygen is an example of a diatomic element.
2 attempts left check my work
be sure to answer all parts.
calculate the density of a solid substance if a cube measuring 2.72 cm on one side has a mass of 129 g.
Answer:
6.41 gm / cm^3
Explanation:
cube volume = 2.72 x 2.72 x 2.72 cm^3 = 20.124
Density = mass / volume = 129 g / 20.124 cm^3 = 6.41 gm / cm^3
An ice freezer behind a restaurant has a freon leak, releasing 31.68 g of C2H2F3Cl into the air every week. If the leak is not fixed, how many kilograms of fluorine will be released into the air over 6 months
The weight of fluorine released in to the air over 6 month will be 0.365 kg
What is Freon ?
Freon is a non-combustible gas that is used as a refrigerant in air conditioning applications.
This freon undergoes an evaporation process over and over again to help produce cool air that can be circulated throughout your AC system
Total number of weeks = 6 x 4 = 24
Mass leak rate of freon = 31.68 g/week
Mass leak rate of flourine = fluorine mass in freon / molecular mass of freon x leak rate
= 19 x 3 / 118.5 x 31.68
= 15.23 gm/week
Total fluorine leak in 6 month = 15.23 x 24 = 365.72 gm = 0.365 kg
Hence, The weight of fluorine released in to the air over 6 month will be 0.365 kg
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What is the wavelength of an electromagnetic wave that has a frequency of 7.80 * 10 ^ 14 Hz in a vacuum? (The speed of light in a vacuum is 3.00 * 10 ^ 8 m/s.)
A. 1.22 * 10 ^ - 15 * m
B. 3.85 * 10 ^ - 7 * m
C. 2.34 * 10 ^ 23 * m
D. 2.60 * 10 ^ 6 * m
Answer:
B.) 3.85 x 10⁻⁷ m
Explanation:
To find the wavelength, you can use the following formula:
wavelength = speed of light / frequency
Since you have been given both the speed of light and frequency, you can plug these values into the equation to find wavelength.
wavelength = speed of light / frequency
wavelength = (3.00 x 10⁸ m/s) / (7.80 x 10¹⁴ Hz)
wavelength = 3.85 x 10⁻⁷ m
Samantha opened a tin of white paint. The paint consisted of a liquid and particles of titanium dioxide that are insoluble in the liquid.The paint had separated into two layers What type of substance in the titanium dioxide
Titanium dioxide is a type of mixture if particles of titanium dioxide are insoluble in the liquid.
What is a mixture?A mixture is composed of one or more pure substances in varying compositions.
A mixture is a material made up of two or more components joined together, but not chemically combined. In a mixture, a chemical reaction does not occur and each of its components maintains its identity and chemical properties.
A compound is a substance formed by the chemical combination of two or more different elements from the periodic table. The elements of a compound cannot be divided or separated by physical processes. They are not mixtures or alloys
An element is a type of matter made up of atoms of the same class. It is an atom with unique physical characteristics, a substance that cannot be decomposed by a chemical reaction.
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An electrolytic cell differs from a voltaic cell because.
as a nail approaches the south pole of a magnet, what happens to its magnetic domains?
A. The north poles of the domains point toward the magnet.
B. The south poles of the domains point toward the magnet.
C. The domains spin, but end up in no particular pattern.
D. The domain remain unaffected by the magnet.
The domain remain unaffected by the magnet is the right answer.
What happens to its magnetic domains?Both the north poles and the south poles of the domains point toward the magnet so the domains is unaffected by the magnet as the nail approaches to the south pole of a magnet.
So we can conclude that the domain remain unaffected by the magnet is the right answer.
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Answer. The domain remain unaffected by the magnet
work out the size of resistance.
Answer:
Step 1: Identify the resistivity (ρ) , length (L), and radius (r) of the wire. Step 2: Calculate the cross-sectional area of the wire using the formula for the area of a circle: A=πr2 A = π r 2 . Step 3: Calculate the resistance (R) of the wire using the formula for resistance: R=ρLA R = ρ L A
Which of the following is a double replacement reaction?
K2S + CoCI2 -> 2KCI + CoS
Ca + 2H2O -> Ca (OH)2 + H2
CaO + H2O -> Ca(OH)2
2KCIO3 -> 2KCI + 3O2
The reaction that exemplifies a double replacement reaction is as follows: K2S + CoCI2 -> 2KCI + CoS, which is option 1.
What is a double replacement reaction?A double replacement reaction is a type of reaction in which two elements are substituted in the reacting compounds.
In the reaction given as follows:
K2S + CoCI2 -> 2KCI + CoS
Pottasium replaces cobalt in Cobalt chlorideSulfur replaces chlorine in Cobalt chlorideTherefore, the reaction is a type of double replacement reaction.
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How many moles are present in 6.5 x 1024 atoms of Ba?
10.8 moles are present in 6.5 × 10²⁴ atoms of Barium (Ba). Details on how to calculate number of moles can be found below.
How to calculate number of moles?The number of moles of a substance can be calculated by dividing the number of atoms in the substance by Avogadro's number.
According to this question, 6.5 × 10²⁴ atoms of Ba are present, the number of moles is calculated thus:
no of moles = 6.5 × 10²⁴ ÷ 6.02 × 10²³
no of moles = 1.08 × 10¹
no of moles = 10.8moles
Therefore, 10.8 moles are present in 6.5 × 10²⁴ atoms of Barium (Ba).
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Find the ratio of the volume divided by the
temperature for the first data pair. Use significant
figures.
V/T=0.72/276= 0.002 ✓
COMPLETE
Now do the same computation for all six pairs of
values. What is the average of all six fractions V/
T?
From the pair of values given, the ratio of the volume to the temperature for the first data pair is, 0.0026 cm³/K
What is a Ratio?A ratio is a comparison between two quantities showing how much one quantity differs from another.
From the data given, the first data pair is as follows ;
Temperature = 276 KVolume = 0.72 cm³Ratio of volume to temperature = volume / temperature
Ratio = 0.72 / 276
Ratio = 0.002608 cm³/K
The significant figure's rule for division is the least number of significant figures used in the operation.
The least significant figure of the values given is 2.
Therefore, the ratio of the volume to the temperature for the first data pair is 0.0026 cm³/K
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Answer:
0.0026
Explanation:
edge 2022 it's the same answer for both parts
How many liters of a 0.80 M
solution can be made with 2.0 mol
KNO3?
Answer: 2.5
Explanation: you devide mol solute which is 2.0 and the L solution which is 0.80M, and after you divide the two you get 2.5
i also had this question <3
The molarity is an important method to calculate the concentration of a solution. The volume of potassium nitrate of 0.80 molarity and 2.0 mol moles is 2.5 L.
What is molarity?The molarity of a solution is defined as the number of moles of the solute present per litre of the solution. It is mainly employed in calculating the molarity of a binary solution. It is represented as 'M' and unit is mol L⁻¹.
The equation used to calculate the molarity is given as:
Molarity = Number of moles of the solute / Volume of the solution in litres
Here molarity = 0.80 M
Number of moles = 2.0 mol
Then the volume of the solution = Number of moles of the solute / Molarity
Volume = 2.0 / 0.80 = 2.5 L
Thus the volume of the solution is 2.5 L.
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Please answer one question. thanks so much if u do
What is the substance produced by a chemical reaction called?
a) Reactant
b) Product
c) Resultant
d) Reagent
e) Summation
What kind of chemical reaction involves oxygen and another substance producing water and carbon dioxide?
a) Synthesis reaction
b) Decomposition reaction
c) Combustion
d) Single displacement
e) Photochemical reaction
What does a catalyst do to a chemical reaction?
a) Stops the reaction
b) Starts the reaction
c) Speeds up the rate of reaction
d) Slows down the rate of reaction
e) None of the Above
Answer:
b) Product
c) Combustion
c) speeds up the rate of reaction
Explanation:
the substance produced by a chemical reaction is called a product (b)
Combustion (c) reactions are involving oxygen and "another substance" [and hydrocarbons] to produce carbon dioxide and water.
A catalyst acts to speed up the rate of a reaction (c)
> note how it "speeds up" reaction: , it [a catalyst] lowers the pressure or temperature needed to start one--but it isn't used/consumed in the reaction
So, the answers are: b, c, c
hope this helps!!
Which of the following best describes a mixture? A. A substance that results when another substance is separated into its component parts B. A substance composed of two or more elements chemically combined C. A substance that results when two or more substances combine physically but not chemically D. A particle consisting of two or more atoms chemically combined
Answer: C. A substance that results when two or more substances combine physically but not chemically
What are distilled chemicals used for and what are the environmental impacts?
Answer:
Cryogenic distillation is the commercially viable separation; however, it consumes over 20 Gigajoules of energy for every ton of ethylene produced. This energy consumption is associated with significant greenhouse gas emission and depletion of non-renewable energy resources
Explanation:
hope it's helpful to you
How many moles of NO2 form when
63.25 g N2O5 decompose?
2N2O5→ 4NO2 + 0₂
Answer:
1.1713 moles
Explanation:
RFM of N2O5= (14*2)+(16*4)=108
Moles of N2O5= Mass/RFM= 63.25/108= 0.5856 moles
Mole ratio of N2O5:NO2 = 2:4
Therefore moles of NO2= 4/2*0.5856= 1.1713 moles
what will happen when a wax candle burned in air with limited oxygen?
Answer:
The molecules of carbon dioxide are heavier than air. When a result, as they descend over the flame and candle, they push the oxygen and other air molecules out of the path. The oxygen can no longer react with the wax when it is pushed away from the wick. The flame is put out as a result.
Answer:
if the candle is burned in air with limited oxygen supply the candle will go out of fire as the oxygen is reducing....
Explanation:
Hope It Helps!!!
Find the total surface area of the rectangular prism in the figure. A) 174 cm^ 2 B) 522c * m ^ 2; 348c * m ^ 2 D) 432c * m ^ 2
[tex]\huge\textbf{Hey there!}[/tex]
[tex]\huge\textbf{Better understanding of the lesson}[/tex]
[tex]\text{Formula for finding the area of rectangular prism: \boxed{\mathsf{2(wl + hl + hw) = a}}}\\\text{Whereas, \bf l = \underline{length}, w = \underline{width}, h = \underline{height.}, and a = \underline{area}}[/tex]
[tex]\huge\textbf{Now, let's solve for the given equation}[/tex]
[tex]\mathsf{a = 2\times(8\times6 + 9\times6 + 9\times8)}[/tex]
[tex]\mathsf{a = 2\times(48 + 54 + 72)}[/tex]
[tex]\mathsf{a = 2(48) + 2(54) + 2(72)}[/tex]
[tex]\mathsf{a = 96 + 108 + 144}[/tex]
[tex]\mathsf{a = 204 + 144}[/tex]
[tex]\mathsf{a = 348}[/tex]
[tex]\huge\textbf{Therefore, your answer is: \boxed{\mathsf{348\ cm^2}}}\huge\checkmark[/tex]
[tex]\huge\textbf{Good luck on your assignment \& enjoy}\\\huge\textbf{your day!}[/tex]
~[tex]\frak{Amphitrite1040:)}[/tex]
What is the independent variable for boiling temperature of water as salt is adddd
The independent variable is the different amounts of salt that will be added to the water.
What is a variable?A variable is any characteristic, number, or quantity that can be measured or counted.
The independent variable is the different amounts salt that will be added to the water (what is done by the scientist).
The dependent variable is the boiling temperature of the water (what is being measured).
HYPOTHESIS: If salt is added to water then, the boiling temperature is lowered.
Hence, the independent variable is the different amounts of salt that will be added to the water.
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Help!!!!!!!!!!!!!!!!
Answer:
the mixture two is the Heterogeneous solution and the mixture 1 (sugar solution) is true solution
Explanation:
Heterogeneous solutions are solutions with non-uniform composition and properties throughout the solution. A solution of oil and water, water and chalk powder and solution of water and sand, etc.
True solution
The sugar solution is a mixture of sugar and water which is a true solution. True Solution is a homogeneous mixture of two or more materials with a particle size of less than 10-9 m or 1 nm dissolved in the solvent.
A solute is a substance to be dissolved.
The solvent is the one in which solute is dissolving.
In the sugar solution sugar is the solute and water is the solvent.
Answer:
Explanation:
your cool
Please help ASAP
Is there any evidence that a reaction has occurred? (One or more answers may be true.)
a. No, there is no change in the solution.
b. Yes, because H2SO4 is being added.
c. Yes, a precipitate formed.
d. Yes, there is a change in conductivity.
if the maximum temperature for a particular day is 20°c and the minimum temperature is 10°c, the daily mean would be:
The daily mean, given the data from the question is 15 °C
Data obtained from the questionMaximum temperature = 20 °CMinimum temperature = 10 °CMean = ?How to determine the daily meanMean = Sumation of data / Number of data
Mean = (20 + 10) / 2
Mean = 30 / 2
Mean = 15 °C
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blocks on the periodic table will not list a(n):
Blocks on the periodic table will not list a mass number of elements in this scenario.
What is Periodic table?This table comprises of elements in order of their atomic number which determines their chemical properties.
It contains the atomic number but however doesn't contain the mass number of the elements.
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0.467 mol NaCl are needed to
create a 0.875 m solution using 534
g of water. How many grams of
sodium chloride are required to
make the solution?
Answer:
27.4 gram is the solution it's simple dude...
Explanation:
don't be afraid of huge question they confuse you you need not to be confused
now see simple solution
molality is denoted by m
so
m= moles of solute / mass of solvent in kg.
i hope your know the meaning of solute and solvent....
so moles are given 0.467
and molar mass is given 58.44
so just take out the gram means
by applying formula
58.44×0.467
it will give 27.4 grams simple.....
3. Why did the solution change from blue to yellow (what chemical reaction happened)?
Answer:
it was more acidic
Explanation:
changing the pH of the solution and making it more acidic results in the color of the solution changing it from blue to yellow
solution is Bromothymol blue
in a ph below 6 it turns yellow because
a ph below 6 is acidic
a ph above 7.6 its blue because
a ph above 7.6 is basic
Bromothymol blue is made in a basic solution, so it starts out as blue, thus the name 'blue'. It changes to yellow in acidic conditions
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An atom is neutral because it has the same number of electrons as it has???????????????????????????????????????????????????????????
Answer:
protons
Explanation:
the protons and electrons of an element are the same amount however the neutrons are a different amount
What is the chemical formula for acetic acid?
CH3COOH
Explanation:
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How many xenon atoms are contained in 2. 36 moles of xenon?.
Answer:
14.212 x 10^23 atoms
Explanation:
Xenon is a noble gas and is MONOTOMIC so
EACH mole is an Avagadro's Number of atoms
2.36 * 6.022 x 10^23 atoms =
Explain one way in which facilitated diffusion is the same as simple diffusion.
Answer:
they both transport molecules along or down the concentration gradient of the solute and tdo not require energy from an outside source.
54.0 g Al reacts with 64.0 g O2 to
form Al2O3 according to the equation.
4A1+30₂ → 2Al2O3
Al: 26.98 g/mol Al2O3: 101.96 g/mol
How many grams of Al2O3 form
from 54.0 g Al?
[?] g Al₂O3
Answer:
102 g Al₂O₃
Explanation:
To find the mass of Al₂O₃, you need to (1) convert grams Al to moles Al (via molar mass), then (2) convert moles Al to moles Al₂O₃ (via mole-to-mole ratio from reaction coefficients), and then (3) convert moles Al₂O₃ to grams Al₂O₃ (via molar mass). It is important to arrange the ratios in a way that allows for the cancellation of units. The final answer should have 3 sig figs to reflect the given values.
Molar Mass (Al): 26.98 g/mol
Molar Mass (Al₂O₃): 101.96 g/mol
4 Al + 3 O₂ ---> 2 Al₂O₃
54.0 g Al 1 mole 2 moles Al₂O₃ 101.96 g
-------------- x ----------------- x ----------------------- x ---------------- = 102 g Al₂O₃
26.98 g 4 moles Al 1 mole
Answer: 102 for 54.0 and 136 for 64.0
Explanation:
how many atoms of of titanium are present in a sample containing 0.375 moles Ti
2.258302785 x [tex]10^{23}[/tex] atoms of titanium are present in a sample containing 0.375 moles of Ti.
What are moles?A mole is defined as 6.02214076 × 10^{23} of some chemical unit, be it atoms, molecules, ions, or others. The mole is a convenient unit to use because of the great number of atoms, molecules, or others in any substance.
To find the number atoms we need to multiply by 6.02214076 × 10^{23}.
0.375 moles x 6.02214076 × [tex]10^{23}[/tex]
2.258302785 x [tex]10^{23}[/tex]
Hence, 2.258302785 x [tex]10^{23}[/tex] atoms of titanium are present in a sample containing 0.375 moles of Ti.
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