Answer : The volume of pure diamond is [tex]0.493inch^3[/tex]
Explanation : Given,
Density of pure carbon in diamond = [tex]3.52g/cm^3[/tex]
Moles of pure diamond = 23.7 moles
Molar mass of carbon = 12 g/mol
First we have to calculate the mass of carbon or pure diamond.
[tex]\text{ Mass of carbon}=\text{ Moles of carbon}\times \text{ Molar mass of carbon}[/tex]
Molar mass of carbon = 12 g/mol
[tex]\text{ Mass of carbon}=(23.7moles)\times (12g/mole)=284.4g[/tex]
Now we have to calculate the volume of carbon or pure diamond.
Formula used:
[tex]Density=\frac{Mass}{Volume}[/tex]
Now putting all the given values in this formula, we get:
[tex]3.52g/cm^3=\frac{284.4g}{Volume}[/tex]
Volume = [tex]80.8cm^3[/tex]
As we know that:
[tex]1cm^3=0.061inch^3[/tex]
So,
Volume = [tex]0.061\times 80.8inch^3[/tex]
Volume = [tex]0.493inch^3[/tex]
Therefore, the volume of pure diamond is [tex]0.493inch^3[/tex]
What element is in 3rd period and the 1st group?
Answer:
That is sodium
Explanation:
Sodium is found there
Which of the following elements belong to the same group/family?
A. H and He
B. Li and Be
C. C and Pb
D. Ni and Ra
Answer:
C. C and Pb
Both are in group IV elements.
classify the chemical equation CaCO3 → CaO + CO2
This is displacement reaction.
Choose one region on the world map. How does the climate there differ during El Niño and La Niña?
United States
The jet stream is oriented from west to east across the southern portion of the United States, during El Niño. Although El Niño's strongest impacts are felt around the equatorial Pacific, they can affect weather around the world by influencing high and low pressure systems, winds and precipitation. And as the warmer ocean waters release excess energy (heat) into the atmosphere, global temperatures rise.
During La Niña, the jet stream and severe weather are likely to be farther north. It refers to the periodic cooling of sea-surface temperatures across the east-central equatorial Pacific.
El Niño and La Niña result from interaction between the surface of the ocean and the atmosphere in the tropical Pacific. Changes in the ocean impact the atmosphere and climate patterns around the globe. In turn, changes in the atmosphere impact the ocean temperatures and currents.
The region chosen is United States and the southern tier of Alaska and the U.S. Pacific Northwest tends to be warmer than average during El Niño and La Niña.
What is Climate?This is defined as the average weather condition of a place over a given period of time.
The U.S.southern tier of state also tends to be cooler during this period which makes it the most appropriate choice.
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The enthalpy of vaporization for water is 40.67 kJ/mol and the enthalpy of fusion for water is
6.01 kJ/mol. What is the enthalpy of deposition?
Answer:
[tex]\Delta H_{dep}=-46.68kJ/mol[/tex]
Explanation:
Hello!
In this case, since vaporization is the processes by which a liquid goes to the gas phase, fusion by which a solid goes to liquid and deposition by which a gas goes to solid; we infer that the following set up relates the enthalpies associated to each process:
[tex]\Delta H_{fus}+\Delta H_{vap}=-\Delta H_{dep}[/tex]
Because deposition goes from a state with more energy to a state with less energy, therefore it is negative; in such a way, by plugging in we obtain:
[tex]\Delta H_{dep}=-(\Delta H_{fus}+\Delta H_{vap})\\\\\Delta H_{dep}=-(6.01kJ/mol+40.67kJ/mol)\\\\\Delta H_{dep}=-46.68kJ/mol[/tex]
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What is the mass of 5 moles of Fe2O?
Explanation:
1 miole of Fe2O is 6.22 × 10^-23
5mole of Fe2O = 5×6.22×10^-23
=31.1×10^-23
Mass of 5 moles of [tex]Fe_2O[/tex] is 636 g.
Formula for the calculation of mass is as follows:-
[tex]Number\ of\ mole=Mass/Molar mass[/tex].......(1)
The molar mass of [tex]Fe_2O[/tex]is [tex]2\times55.6\ g+16\ g=127.2 \g[/tex]
So ,the mass of 5 moles of [tex]Fe_2O[/tex]is as follows:-
[tex]5\ mol=Mass/127.2\ g/mol\\5\ mol/times127.2\ g/mol=Mass\\636\ g=Mass[/tex]
Hence, the mass of 5 moles of [tex]Fe_2O[/tex] is 636 g.
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10. Identify the products in the combustion of methane.
(1 Point)
a. CO2 and H20
O b. CH4 and 02
O c. O2 and H20
O d. CH4 and CO2
Answer:
a. CO2 and H20
Explanation:
Chemically, this combustion process consists of a reaction between methane and oxygen in the air. When this reaction takes place, the result is carbon dioxide (CO2), water (H2O), and a great deal of energy. The following reaction represents the combustion of methane:
CH4[g] + 2 O2[g] -> CO2[g] + 2 H2O[g] + energy
One molecule of methane, (the [g] referred to above means it is gaseous form), combined with two oxygen molecules, react to form a carbon dioxide molecule, and two water molecules usually given off as steam or water vapor during the reaction and energy.
which action describes chemical weathering
A. Water carving out a limestone cave
B. Water cutting downward to deepen a river channel
C. Water freezing and thawing to widen cracks in rock
D. Water depositing beach sand
(Note: This is from Earth Science)
Answer:
A
Explanation:
just took the test and it’s right
The action that best describes chemical weathering is water carving out a limestone cave.
CHEMICAL WEATHERING:
Weathering generally means the breakdown of rocks into smaller particles. Weathering can occur either chemically or mechanically. Chemical weathering is caused by chemical reactions involving water. Water reacts with minerals in rocks and dissolves it into new substances. Therefore, the action that best describes chemical weathering is water carving out a limestone cave.Learn more at: https://brainly.com/question/18346756?referrer=searchResults
A precipitate is a solid that sometimes forms when two liquids combine.
A true
B False
A precipitate is a solid that sometimes forms when two liquids combine.
Answer:A. True
Explanation:Because the Precipitate it's forms solid when two liquids combine to precipitate. #CARRYONLEARNING #STUDYWELLA precipitate is a solid that sometimes forms when two liquids combine.
Choosing:A. True
B. False
Answer:A. True
#READINGHELPSWITHLEARNING #CARRYONLEARNING #STUDYWELLWhat is the ionic equation for the following
2FeCl(aq)
3Mg(s)
3MgCl(aq)
2Fe(s)
Answer : The net ionic equation will be,
[tex]2Fe^{3+}(aq)+3Mg(s)\rightarrow 3Mg^{2+}(aq)+2Fe(s)[/tex]
Explanation :
In the net ionic equations, we are not include the spectator ions in the equations.
Spectator ions : The ions present on reactant and product side which do not participate in a reactions. The same ions present on both the sides.
The given balanced ionic equation will be,
[tex]2FeCl_3(aq)+3Mg(s)\rightarrow 3MgCl_2(aq)+2Fe(s)[/tex]
The ionic equation in separated aqueous solution will be,
[tex]2Fe^{3+}(aq)+6Cl^{-}(aq)+3Mg(s)\rightarrow 3Mg^{2+}(aq)+6Cl^{-}(aq)+2Fe(s)[/tex]
In this equation, [tex]Cl^{-}[/tex] is the spectator ion.
By removing the spectator ions from the balanced ionic equation, we get the net ionic equation.
The net ionic equation will be,
[tex]2Fe^{3+}(aq)+3Mg(s)\rightarrow 3Mg^{2+}(aq)+2Fe(s)[/tex]
This data was collected after conducting an experiment about the amount, in liters, of water a specific plant needs per month. An accepted value for the measurement is 6 liters. These are the collected experimental values.
Which values in the collected data are precise? Check all that apply.
1.1 liters
1.2 liters
1.5 liters
6.0 liters
8.1 liters
Answer:
1.1 liters
1.2 liters
1.5 liters
Explanation:
Precision in data refers to how close the experimental values of an experiment are to one another irrespective of the true or accepted value. In other words, a set of values are said to be PRECISE if they are close to one another.
In this case, data was collected after conducting an experiment about the amount, in liters, of water a specific plant needs per month. However, according to the set of experimental values provided, only 1.1 litres, 1.2litres and 1.5litres are close to one another and, hence, are said to be PRECISE even if they are not close to the accepted value of 6litres.
Answer:
1.1 liters
1.2 liters
1.5 liters
Explanation:hope you do good in edge
Solid calcium hydroxide is dissolved in water until the pH of the solution is 10.44. Determine the concentration of the calcium hydroxide in the solution.
Answer:
1.38x10⁻⁴ M
Explanation:
First, we calculate the pOH of the solution, using the given pH:
pOH = 14 - pHpOH = 14 - 10.44pOH = 3.56Now we calculate the concentration of OH⁻, using the pOH:
pOH = -log[OH⁻][OH⁻] = [tex]10^{-pOH}[/tex] = 2.75x10⁻⁴ MFollowing the reaction Ca(OH)₂ → Ca⁺² + 2OH⁻, we divide [OH⁻] by 2 to calculate [Ca(OH)₂]:
[Ca(OH)₂] = 2.75x10⁻⁴ M / 2 [Ca(OH)₂] = 1.38x10⁻⁴ MThe concentration of the calcium hydroxide in the solution is 1.38 * 10⁻⁴ M
pH:pH is calculated using the expression:
[tex]pH = - log [H_3O^+][/tex]
Given:
pH of the solution = 10.44
Calculation of pOH of the solution, using the given pH:[tex]pOH = 14 - pH\\\\pOH = 14 - 10.44\\\\pOH = 3.56[/tex]
Calculation for concentration of OH⁻, using the pOH:[tex]pOH = -log[OH^-]\\\\[OH^-] = 2.75* 10^{-4} M[/tex]
From the reaction:Ca(OH)₂ → Ca⁺² + 2OH⁻
The concentration of OH⁻ is then divided by 2 according to the given reaction.
[tex][Ca(OH)_2] = \frac{2.75*10^{-4}M}{2}\\\\[Ca(OH)_2] = 1.38*10^{-4}M[/tex]
Thus, the concentration of the calcium hydroxide in the solution is 1.38 * 10⁻⁴ M.
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Please help!!! I’ll mark brainlist
Explanation:
they are closer and made of gas
In any chemical reaction, the atoms of any substance that you begin with, you must end with follows the ___
Law of Definite Proportions
Law of Conservation of Mass
Rule of Zero
Law of Multiple Reactions
Answer:
IAM at exam sorry that's why I can't answer
An insulated cup contains 66.0g of water at 22.00oC. A 28.50g sample of metal at 95.25oC is added. The final temperature of the water and metal is 27.84oC. What is the specific heat of the metal
Answer:
Specific heat of metal of the metal is 0.8394J/g°C
Explanation:
The heat the water gain is the same losing for the metal. The equation is:
m(Metal)*ΔT(Metal)*S(Metal) = m(Water)*ΔT(Water)*S(Water)
Where m is mass: 66.0g water and 28.5g Metal
ΔT is change in temperature: (95.25°C-27.84°C) = 67.41°C for the metal and (27.84°C - 22.00°C) = 5.84°C for the water
And S is specific heat of water (4.184J/g°C) and the metal
Replacing:
28.5g*67.41°C*S(Metal) = 66.0g*5.84°C*4.184J/g°C
S(Metal) = 0.8394J/g°C
Specific heat of metal of the metal is 0.8394J/g°C
NEED HELP ON 7,8,9 PLEASE
Answer:
number 7 is GROWTH
number 8 is TARGET CELLS
number 9 is pituitary gland
Where does photosynthesis occur in a plant cell, specifically what
organelle?
2 points
Your answer
During the chemical reaction of photosynthesis. Light energy is converted 2 points
into what type of energy?*
Your answer
2 points
Look at this image, which numbers represent the PRODUCTS of
photosynthesis?
Sun's energy
Answer:
1) chloroplast
A chloroplast is an organelle within the cells of plants and certain algae that is the site of photosynthesis, which is the process by which energy from the Sun is converted into chemical energy for growth.
2)Photosynthesis is the process in which light energy is converted to chemical energy in the form of sugars. In a process driven by light energy, glucose molecules (or other sugars) are constructed from water and carbon dioxide, and oxygen is released as a byproduct.
3)i need the photo to answer
Explanation:
PLEASE MARK ME AS BRAINLIEST
What is the male reproductive part of the plant that produces pollen
Answer:
Stamen
Explanation:
Answer:
stamen
Explanation:
The stamen is the male reproductive organ. It consists of a pollen sac (anther) and a long supporting filament.
Which natural forces can weather and erode rock? Check all that apply.
clouds
ice
heat
water
wind
u don't have to rush but help please
Answer:
The answer would be ice, heat, water, and wind. (Hope this helps).
Answer:
the last four options
ice
heat
water
wind
Explanation:
edg2020
A 2-lb sample of an unknown liquid occupies a volume of 62.6 in.3 For the liquid determine (a) the specific volume, in ft3 /lb, and (b) the density, in lb/ft3 .
Answer:
a) 0.018 ft^3
b) 55.55 lb/ft^3
Explanation:
given that mass m = 2 lb
volume = 62.6 in^3
= 0.036 ft^3
now, specific volume = volume/mass [specific volume is the reciprocal of density]
=0.036/2 = 0.018 ft^3.
b) density = mass/ volume = 2/0.036 = 55.55 lb/ft^3
What is the molarity of a solution of 10% by mass cadmium sulfate, CdSO4 (molar mass = 208.46 g/mol) by mass? The density of the solution is 1.10 g/mL.
a) 0.528 M
b) 0.436 M
c) 0.479 M
d) 0.048 M
e) 22.9 M
Answer:
a. 0.528 M ..
Explanation:
Hello!
In this case, since the given by-mass percent can be written as:
[tex]\frac{10gCdSO_4}{100g\ sol}[/tex]
By using the density and molar mass of the solute, cadmium sulfate, we can compute the molarity, by also making sure we convert from mL to L of solution:
[tex]M=\frac{10gCdSO_4}{100g\ sol}*\frac{1molCdSO_4}{208.46gCdSO_4} *\frac{1.10g\ sol}{1mL\ sol} *\frac{1000mL\ sol}{1L\ sol} \\\\M=0.528M[/tex]
Thereby, the answer is a. 0.528 M .
Best regards.
Newbie Here pls.. HELP me
Answer:
1. Litres
2. minutes
3. Kelvin (K)
4. Kilometer/hour
5. hours
6. Litre
7. metre
8. metre
9. Litres
10. milliliters
Explanation:
1. Coca-Cola is a liquid substance, hence, its volume must be measured in LITRES.
2. This question is related to time I.e. being early, hence, the unit of measurement is MINUTES.
3. The unit of temperature is Kelvin (K). Therefore, water boils at 373K
4. This question is related to speed, whose unit of measurement is kilometer/hour (km/hr).
5. A movie runs with time, which is measured in HOURS.
6. Mineral water is a liquid, which can only be bought per volume. Hence, the appropriate unit is LITRE.
7. Height is measured in metres (m). Therefore, one can say that " the height of your younger brother is 10metres"
8. The length of a substance is also measured in metres.
9. Volume is measured in LITRES
10. Cough syrup is a drug whose volume is quantified by millilitres i.e. a thousandth litre
Ben observes how quickly some dry wood is burning in a campfire. Which term best relates to Ben’s observation?
Answer:
Reaction rate
Explanation:
We are told that Ben observes how quickly some dry wood is burning in a campfire.
This is an example of reaction rate because it tells us the speed i.e. how fast the dry wood is reacting with the camp fire.
i hope y’all understand lolz
Answer:
protons are red neutrons are green electrons are yellow
Explanation:
TIE FIGHTERS GO ZOOOOOM
How might you think it is possible to convert from moles to particles or grams to particles?
Explanation:
To convert moles to particles or grams to particles, let us have a firm understanding of what a mole is.
A mole is the unit of measuring quantity of particles.
It is the amount of substance that contains the Avogadro's number of particles.
The particle can be atoms, molecules, formula units, electrons, protons, neutrons, etc.
So, to convert from moles to particles;
1 mole of a substance contains 6.02 x 10²³ particles
To convert from grams to particles;
First convert to moles;
number of moles = [tex]\frac{mass}{molar mass}[/tex]
So, 1 mole of a substance contains 6.02 x 10²³ particles
Heat energy can be transferred from a source to a receiver by
I. radiation.
II. convection.
III. conduction.
A.
I, II, and III
B.
II only
C.
I only
D.
III only
Answer:
It's I, II, and III
Explanation:
Trust me.
Please someone help me
examples of acidic and basic oxides that can prepared by the thermal decomposition of nitrates and carbonates
Answer:
Explanation:
Silicon, phosphorus, sulphur, and chlorine oxides are acidic
Sodium oxide, which reacts with water to produce sodium hydroxide. Magnesium oxide, which reacts with hydrochloric acid to form magnesium chloride. Copper(II) oxide, which reacts with nitric acid to form copper nitrate are basic.
Please help
What is the formula for pentaboron nonahydride?
For each of the pictures below, decide what element it comes from and circle atom or
ion Then write the chemical symbol and the charge if any.
Answer:
#1 Atom
Oxygen
Charge neutral atom
#2 ion
Oxide ( oxygen anion)
Charge 2-
Formula O2-
#3 Atom
Flourine
Neutral atom no charge
#4 atom
Flourine
Neutral atom no charge
#5 ion
Sulphide
Charge 2-
S2-
#6 ion
Chloride Cl-
Charge -1
#7 atom
Chlorine
No Charge neutral
#8 ion
Calcium ion cation
Charge 2+
Ca++
#9 atom
Hydrogen (protium)
No charge neutral
#10 atom
Hydrogen (deutrium)
No charge neutral
#11 ion
Proton H+
Charge +1
#12 atom
Helium
No charge neutral atom
Explanation:
To find charge we need difference in proton and electron if proton are equal to electron then this is neutral atom
If electron are more this is negative charge ion
For example in oxygen 8 proton and 10 electron its charge is negative 2
If proton are more this is positive charge ion
For example in calcium 20 proton and 18 electron positive ion is formed.
According to the picture, the name of each element along with its charge and chemical symbol is as follows:
Picture 1 represents an oxygen atom that is neutrally charged. Picture 2 represents an oxide ion (oxygen anion), formula [tex]O^2^-[/tex]. Picture 3 represents a fluorine atom that is a neutrally charged atom.Picture 4 also represents a fluorine atom that is a neutrally charged atom.Picture 5 represents a sulfide ion with the charge of [tex]2^-[/tex]. Picture 6 represents a chloride ion with a charge of -1. Cl-Picture 7 represents a chlorine atom with a neutral charge. ClPicture 8 represents a calcium ion with the charge of +2 (cation).Picture 9 represents a neutral hydrogen atom (protium).Picture 10 represents a neutral hydrogen atom (deuterium).Picture 11 represents a hydrogen ion with a charge of +1. Picture 12 represents a neutrally charged helium atom. (He)What is a chemical element?A chemical element may be defined as the characteristics of atoms that possess a given number of protons in their nuclei, along with the number of neutrons including the pure substance typically consisting only of that species.
Therefore, according to the picture, the name of each element along with its charge and chemical symbol is well mentioned above.
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