Answer:
1. dividing the mass of water lost by the mass of hydrate used is equal to the fraction of water in the compound. Multiplying this fraction by 100 gives the percent water in the hydrate.
2. hydrate or compounds that incorporate water molecules into the fundamental solid structure in a hydrate which usually has a Pacific crystalline form a Define number of water molecules are associated with each formula unit on the primary material Gypsum is a hydrate with two water molecules present for each formula unit of caso4 the chemical formula for Gypsum is caso4 . H2O
Answer:
45.4% and 54.6%
Which word equation shows hydrogen reacting with oxygen to form water?
O oxygen + water → hydrogen
O hydrogen + oxygen Water
O oxygen + water → hydrogen + 'water
O hydrogen + water → oxygen
Nex
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Mark this and return
Explanation:
hydrogen + oxygen = water
Word equation that shows hydrogen reacting with oxygen to form water is Hydrogen + oxygen → Water
In a chemical reaction the compounds that are present in the left hand side of the reaction is reactants and those present on the right hand side are products.
Given options are-
O oxygen + water → hydrogen
O hydrogen + oxygen→ Water
O oxygen + water → hydrogen + 'water
O hydrogen + water → oxygen
Therefore, Word equation that shows hydrogen reacting with oxygen to form water is Hydrogen + oxygen → Water.
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the law of conservation of mass states that in achemical reaction,matter is not cratered or destroyed. is it True or False
Answer: true
Explanation: matter can’t be created or destroyed, none the less
is li3n ionic or covalent
Final answer:
Li3N, or lithium nitride, is primarily an ionic compound formed by the transfer of electrons from lithium to nitrogen, resulting in Li+ cations and N3- anions.
Explanation:
The compound Li3N (lithium nitride) is primarily considered to be ionic in nature. Lithium (Li), being in Group 1 of the periodic table, is a metal, and nitrogen (N2), being in Group 15, is a nonmetal. The electronegativity difference between them is significant, which leads to the formation of ionic bonds as lithium donates electrons to nitrogen, forming cations (Li+) and an anion (N3-). Although lithium can form polar covalent bonds due to its high charge density and the polarizing effect it has on its bonding partners, in the case of lithium nitride, the overwhelmingly dominant type of bonding is ionic.
While lithium can form more covalent type bonds in organometallic compounds, when combined with a nonmetal such as nitrogen, the result is an ionic compound. It is important to consider that while the distinction between ionic and covalent bonds is taught, in reality, there is often a continuum with many compounds exhibiting characteristics of both ionic and covalent bonding. However, based on lithium nitride's composition and attributes, it falls closer to the ionic side of the spectrum.
Ground water is:
O stored in porous soil and rock
o part of the nitrogen cycle
O reduced by respiration
O unavailable to plants
the answer is: Ground water is water beneath the earth’s soil stored in soil pore spaces and in fractures of rock formations. :)
3. A sample of a gas has a mass of 1.25 g and a volume of 1000 cubic centimeters. Solve for density and
identify the gas.
Answer:
The density of the gas is 0.00125 g/cc and the gas is Air.
Explanation:
Given,
mass of gas = 1.25 grams
Volume = 1000 cc.
Density = ?
Density of the gas can be found by using the formula
Density = Mass/Volume
Substituting the values we get,
Density = 1.25/1000 = 0.00125 g/cc.
The gas is air because at room temperature and pressure air has a density of 0.00125 g/cc.
PLEASE ANSWER
Airport security uses electromagnetic waves to see items inside of luggage without having to open the bags. Which type of electromagnetic waves would be best for airport security to use?
A, X-rays would be best because they are low-energy waves that can penetrate gases.
B. Radar waves would be best because they are high-energy waves that can penetrate solids.
C. Radar waves would be best because they are low-energy waves that can penetrate gases.
D. X-rays would be best because they are high-energy waves that can penetrate solids.
Answer:
Answer is D
Explanation:
xrays would be far more efficient at detecting objects through solids.
X-rays would be best because they are high-energy waves that can penetrate solids ( D )
X-rays have shorter wavelengths and higher frequency when compared to radio waves therefore they have higher energy which is required to penetrate solids at the Airport.
Therefore X-rays would be a better suited electromagnetic wave to be used by Airport security to see items inside a luggage.
Hence we can conclude that The type of electromagnetic wave that would be the best for airport security to use is X-rays.
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.Convert 350.0 mL at 740.0 mm of Hg to its new volume at standard pressure.
Answer:
340.8mL
Explanation:
The following data were obtained from the question:
P1 = 740.0mmHg
V1 = 350.0mL
P2 = at stp = 760mmHg
V2 =?
Using Boyle's law equation P1V1 = P2V2, we can easily find the new volume as illustrated below:
P1V1 = P2V2
740 x 350 = 760 x V2
Divide both side by 760
V2 = (740 x 350) /760
V2 = 340.8mL
The new volume is 340.8mL
To convert the volume at a different pressure to its new volume at standard pressure, use Boyle's Law. Substituting the given values into the equation, the new volume at standard pressure is 343.42 mL.
Explanation:To convert the volume at a different pressure to its new volume at standard pressure, we can use Boyle's Law. Boyle's Law states that the pressure and volume of a gas are inversely proportional at constant temperature.
We can use the equation:
P1V1 = P2V2
Where P1 and V1 represent the initial pressure and volume, and P2 and V2 represent the new pressure and volume. Rearranging the equation, we get:
V2 = (P1V1) / P2
Substituting the given values into the equation, we have:
V2 = (740.0 mmHg * 350.0 mL) / (760.0 mmHg)
V2 = 343.42 mL
Therefore, the new volume at standard pressure is 343.42 mL.
Why must the chemical equation be balanced ?
A. Insure proper computation of molecular mass
B.To do extra work
C.Insure proper mole ratio between reactants and products
D.to fulfill the Law of Conservation of Energy
Answer:
D
Explanation:
the answer is d as the law of conservation must be hold good during the equation
What does this diagram represent?
Answer:
The amount of electrons in each atom of the element
Explanation:
Answer:
The amount of electrons in each element of the atom.
Which is transferred due to a temperature difference?
A. heat energy
B. electrical energy
C. chemical energy
Answer:
A
Explanation:
heat energy is transfered through a hot object touching a cold object
Final answer:
Heat energy is the transfer of energy due to a temperature difference between two systems, such as from a warm hand to a colder ice cube. This transfer occurs spontaneously and can result in the change of state of matter, like melting. Heat flows from a higher to a lower temperature and can play a role in various chemical and physical processes.
Explanation:
Energy transfer due to a temperature difference is known as heat energy. This kind of energy transfer occurs because heat is the spontaneous transfer of energy that happens when there is a difference in temperature between two systems. For instance, when an ice cube is held in your hand, the heat from your hand is transferred to the ice cube, causing it to melt.
Thermodynamically, heat energy is the energy that is transferred from one system to another that is not work. This might occur during various processes, such as when electrical energy is converted into light energy in a light bulb and some energy is lost as heat, or during cellular metabolic reactions. Additionally, matter has thermal energy due to the kinetic energy (KE) of its molecules, and temperature corresponds to the average KE of those molecules. Heat energy flows from a higher to a lower temperature, and it can be absorbed or released during chemical and physical processes.
1a. A spring takes a force of 5.ON to extend it by 2.0cm. What is the spring
constant in N/m?
Answer:
Use Hooke's law
Explanation:
Apply formula: F = kxSub values in: 5 = 0.02kUse algebra: k = 250The spring constant is 250 N/mHow many grams of carbon are in 36.6 grams in glucose
Answer:
14.64 grams of carbon
Explanation:
The Molecular formula of Glucose is C₆H₁₂O₆.
From the molecular formula, the Molar mass of Glucose is,
Mass of Carbon in Glucose = 6*12 = 72.
Mass of Hydrogen in Glucose = 12*1 = 12.
Mass of Oxygen in Glucose = 6*16 = 96.
Molar mass of Glucose = 72+12+96 = 180 grams.
180 grams of Glucose contains 72 grams of Carbon.
How many grams of Carbon are there in 36.6 grams of Glucose.
180 --> 72
36.6 --> ?
Let it be 'x' grams
Then, by Criss Cross, (x)(180) = (36.6)(72) => x = 14.64 grams.
Therefore 14.64 grams of carbon are there in 36.6 grams in glucose.
space capsules operate with an oxygen content of about 34%. assuming a total pressure of 780 mm Hg in the space capsule, what is the partial pressure of the oxygen?
265.2 mmHg is the partial pressure of oxygen in 780 mmHg of total pressure.
Explanation:
The partial pressure of a gas is defined as the individual pressure of the gas in total mixture. In an ideal gas all the constituent gases have partial pressure some of which will give total pressure of the gas.
The partial pressure of a gas is calculated by
total pressure x mole fraction of the gas.
Mole fraction of the oxygen present is 0.34 as it is 34% of the total gas.
[tex]\frac{34}{100}[/tex] = 0.34 is the mole fraction
Total pressure is given as 780 mm Hg
The partial pressure can be calculated using the above formula:
Putting the values in equation:
780 x 0.34
= 265.2 mm Hg is the partial pressure of oxygen.
How Can Chemically React Fluoroantimonic acid (1) and Diethynylbenzene Dianion (2) :-
H ₂FSbF ₆ (1) + C ₆H ₄C²⁻ ₄ (2) →
Explanation:
your protons will likely go towards (2)
leaving you with
FSbF6^-2+ H2C6H4C4
time that is measured in definite periods such as minutes, day,and years is called
Answer:
1. relative time
2.absolute time
Explanation:
Time that is measured in definite periods such as minutes, days, and years is called
a. Relative time.
b. absolute time.
What is the gfm of CO2?
Answer:
44.01 g/mol because its basically the weight
Explanation: 12.0107 + 15.9994*2
The gfm (Gram Formula Mass) or molar mass of CO₂ (Carbon Dioxide) is calculated by adding the atomic masses of its constituents: one Carbon atom (12.01 g/mol) and two Oxygen atoms (32 g/mol). This adds up to 44.01 g/mol.
Explanation:You asked for the gfm (Gram Formula Mass) of CO₂. Gram Formula Mass is another term for molar mass, which is calculated by adding up the atomic masses of all the atoms in the molecule. In the case of CO₂, we have one atom of Carbon and two atoms of Oxygen.
The atomic mass of Carbon (C) is approximately 12.01 g/mol, and that of Oxygen (O) is approximately 16.00 g/mol. Since there are two Oxygen atoms, their combined mass is 2 * 16.00 = 32.00 g/mol.
Adding the atomic masses of Carbon and Oxygen together gives us the total gfm of CO2: 12.01 g/mol (Carbon) + 32.00 g/mol (Oxygen) = 44.01 g/mol (for CO₂).
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Select the correct answer.
For the reaction PC15(e) + heat - PC13(e) + Cl2ce), what will happen when the temperature is decreased?
OA.
There will not be a shift in equilibrium.
OB.
There will be a shift toward the products.
OC.
There will be a shift toward the reactants.
OD. Not enough information is given.
Reset
Next
Answer:
Option D. There will be a shift toward the reactants.Explanation:
The reaction is:
[tex]PCl_5(g)+heat\rightleftharpoons PCl_3(g)+Cl_2(g)[/tex]
The application of LeChatelier's principle leads to consider the heat as a reactant or a product depending on if it is on the left side or the right side.
In this reaction, the heat is on the left side, thus it must be considered a reactant.
Decreasing the temperature is equivalent to remove or consume heat. Thus, the reaction must shif to the left to compensate that reduction of heat. That is the reverse reaction shall be favored.
In conclusion, there will be a shift toward the reactants.
How many energy levels dose a tungsten atom have?
Answer:
Tungsten atom has 6 energy level
Explanation:
6 energy levels of tungsten atom
Energy level 1 - 2
Energy level 2 - 8
Energy level 3 - 18
Energy level 4 - 32
Energy level 5 - 12
Energy level 6 - 2
What's a tungsten atom
Is a chemical element with the symbol W and with an atomic number 74.
4) How many grams are there in 7.40 moles of AgNO37
Answer:
1258 grams of AgN03
Explanation:
We calculate the weight of 1 mol of AgN03:
Weight 1 mol AgN03= Weight Ag + Weight N +( Weight 0)x3=108g+ 14g+16gx3=170 g/mol
1 mol----170 g AgN03
7,4mol---x= (7,4 mol x170 g AgN03)/1 mol=1258 g AgN03
Which best describes the people who use chemistry in their careers?
Answer:
D
Explanation:
Answ
D
Explanation:
Any ones whos job requires chemical
Find the velocity of a swimmer who swims exactly 220 m toward the shore in 72 s.
a
3.1 m/s
b
0.33 s/m
c
3.06 s
d
0.33 m/s
Answer: 3.06m/s
Explanation:
Distance covered by swimmer = 220 m
Time taken by swimmer = 72 s.
Velocity = ?
Recall that velocity is the rate of change of distance per unit time. it is measured in metres per second.
Velocity = Distance / time taken
Velocity = 220m / 72seconds
Velocity = 3.055 m/s (approximate to 3.06m/s)
explain polarizing power with ionic radius
Answer:
Polarizing Power is the basis of Fajan's rules of covalent character generally in ionic compounds.
Charges and radius are a function of Polarizing Power, because the higher the charge is, the larger the polarizing power is for cations with the same radius. Also the smaller the radius is, the larger the polarizing power is for cations with the same charge.
Explanation:
What's the molar mass of Calcium Chloride?
Hey there!
Molar mass of CaCl₂:
Add the molar masses of each element multiplied by the amount of that element we have.
Ca: 1 x 40.078
Cl: 2 x 35.453
---------------------
110.98 grams
The molar mass of calcium chloride is 110.98 grams.
Hope this helps!
The molar mass of Calcium Chloride (CaCl2) is 111.0 grams per mole.
To calculate the molar mass of calcium chloride, which is represented by the formula CaCl2, you must add the molar masses of calcium (Ca) and chlorine (Cl) atoms. Calcium has a molar mass of 40.0 grams per mole, while chlorine has a molar mass of 35.5 grams per mole. Since there are two chlorine atoms in calcium chloride, you must multiply the molar mass of chlorine by 2. Therefore, the total molar mass of calcium chloride is the sum of the molar mass of calcium plus two times the molar mass of chlorine: Ca (40.0 g/mol) + 2 × Cl (35.5 g/mol) = 111.0 g/mol.
Why corrosion of aluminum is an advantage for the metal and why the corrosion of iron a serious problem
Answer:a
Explanation: duh man
Answer:
To answer your first question, when the outer layer of aluminum interacts with oxygen, it forms an aluminum oxide layer that is passive. While the outer layer corrodes, it provides a protective coating that protects the inner layer from further deterioration. As a result, aluminum corrosion is beneficial.
To answer your second question, corrosion of iron is a serious problem because almost all things in our civilization is made of iron or one of its alloys, from automobiles to homes, tools to prosthetics.
When you look back at the past of corrosion research, you'll notice that it all began with the question "why does iron rust?" The most powerful organization of corrosion engineers, NACE, crunched the numbers, and the total amount of iron (only in the United States) is in the billions!
When you consider how inexpensive iron is in comparison to other metals, you can see why it is so widely used; and when you consider all of the developments in metallurgy over the last century, you can see how scientists have worked to improve its sturdiness: new alloys with improved corrosion resistance and strength; treatments to postpone corrosion and even attempt to replace it.
Explanation:
I deeply apologize if this is a late or overdue answer. I also hope this answers your original question and if it doesn't, I deeply apologize.
Other than that, I hope this was helpful and I hope you have a pleasant evening :)
how to balance Na + FeBr3 →
Hey there!
Na + FeBr₂ → NaBr + Fe
Firstly, balance Br.
Two on the left, one on the right. Add a coefficient of 2 in front of NaBr.
Na + FeBr₂ → 2NaBr + Fe
Next, balance Na.
One on the left, two on the right. Add a coefficient of 2 in front of Na.
2Na + FeBr₂ → 2NaBr + Fe
Lastly, balance Fe.
One on the left, one on the right. Already balanced.
Our final balanced equation:
2Na + FeBr₂ → 2NaBr + Fe
Hope this helps!
How are the layers of Earth's atmosphere grouped?
(A) by similarities in thermal characteristics, chemical composition,
movement, and density
(B) by differences in thermal characteristics, chemical composition,
movement, and density
(c) by similarities in thermal characteristics and chemical composition but
differences in movement and density
(D) by differences in thermal characteristics and chemical composition but
similarities in movement and density
Answer:
B)
Explanation:
The layers of the atmosphere are classified by changes in temperature in accordance with height.
Write a chemical equation for the reaction between ammonia and sulfuric acid
Answer:
NH3 + H2SO4 ---> ((NH4)2)SO4 + H2O
Explanation:
This is a common reaction; ammonia and sulfate make ammonium sulfate and the excess hydrogen and oxygen(not part of a polyatomic ion) get into the form of H2O
I hope this helps!
(This can commonly be confused as double replacements but hydrogen is in both reactants.)
To what pressure must a gas be compressed in order to get into a 3.00 cubic foot tank
the entire weight of a gas that occupies 400.0 cu. ft. at standard pressure?
Answer:
101333.33mmHg
Explanation:
The following were obtained from the question:
P1 = at stp = 760mmHg
V1 = 400.0cu.ft
V2 = 3cu.ft
P2 =?
Using Boyle's law equation, we obtained:
P1V1 = P2V2
760 x 400 = P2 x 3
Divide both side by the 3
P2 = (760 x 400) /3
P2 = 101333.33mmHg
The gas must b compressed to a pressure of 101333.33mmHg
What is the theoretical yield for CCl4 reacting with 100.0 grams of Cl2 with excess CS2.
Theoretical yield is 216.88 grams when reacting with 100.0 grams of Cl2 with excess CS2.
Explanation:
Theoretical yield is the complete conversion of a limiting reagent in product.
In the equation given
3Cl2 + CS2 ⇒ CCl4
100 grams of Cl2 will give
number of moles = [tex]\frac{mass given}{atomic mass}[/tex]
= [tex]\frac{100}{70.906}[/tex]
= 1.41 moles
3 moles of Cl2 gives 1 mole of CCl4
1.41 moles of Cl2 will give x moles of CCl4
[tex]\frac{1}{3}[/tex] = [tex]\frac{x}{1.41}[/tex]
0.47 moles of CCl4 is formed
Theoretical yield is 0.47 x 153.82
= 216.88 grams.
100 gram of Cl2 is the limiting reagent in the reaction which produced 216.88 grams of CCl4.
What is the pressure of 2.0 mol nitrogen (N2) gas in a 0.5 L container at 310
K?
(The universal gas constant is 0.0821 L'atm/mol.K.)
O
O
A. 6.4 atm
B. 100 atm
C. 0.0098 atm
O D. 25 atm
SUBMIT
Answer:
100 atm
Explanation:
Answer:
Option B. 100atm
Explanation:
The following data were obtained from the question:
n = 2moles
V = 0.5L
T = 310K
R = 0.0821 L.atm/mol.K
P =?
The pressure can obtained by doing the following:
PV = nRT
P = nRT /V
P = (2 x 0.0821 x 310)/0.5
P = 100atm