Answer:
-Salts are composed of ions that form a tightly packed and ordered network, which is called a crystal lattice, and it is held together by ionic bonds.
Explanation: salts are ionic compounds, which are composed by oppositely charged ions (cations and anions) which are bonded each other by ionic bonds, in an ordered arrangement, often a crystalline solid.
-When a salt is added to a polar solvent like water, the ions interact with the solvent molecules via ion-dipole forces, which overcome the forces originally holding the ions together.
Explanation: the molecules of a polar solvent are dipoles because they have dipolar momentum (a difference in charge due to a electronegativiy difference). When a salt is dissolved in a polar solvent, it dissociates in ions. So, the resulting interactions between these species are ion-dipole forces.
-The ions are then isolated and stabilized in solution via these interactions, and when this occurs for most of the salt compound, it is considered soluble in that solvent.
Explanation: the ions in solution are surrounded by solvent molecules which stabilizes them. A salt which is enterely dissolved in a solvent is soluble in that solvent.
-Due to the nature of the interaction between ions and solvent molecules, a concentration of ions can be dissolved higher in water than in alcohol.
Explanation: water molecules have unique properties that make water an universal solvent. Due to these properties and its polarity, water can dissolve larger quantities of salt than other polar solvents such as alcohol.
The electrostatic force in water without salt is stronger as compared to the water due to the presence of free electrons.
In water hydrogen bonding is present that is the only kind of electrostatic force present in the water. In water containing salt sodium and chloride ions are present which conduct strong electrostatic force. A static meter is ideal for measuring the of liquids. It measures the charge on the liquid. Hence, the electrostatic force in salt water is stronger as compared to the water due to the presence of free electrons.Learn more about electrostatic:
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Examples of errors in colorimetry experiments
Answer:
The lack of accuracy and underestimation of absorbance readings obtained from the colorimeter can be contributed to many experimental factors. One plausible error is from the imperfection of the absorber, in that it may not completely absorb the stray light passing by the perimeters of the photoresistor.
Explanation:
In practice there are other sources of error, such as environmental effects on photometer and sample, temperature, line voltage fluctuations, vibrations, contamination, or heating of the sample by the photometer. All these factors may impair the measured result, and ways and means are known to test and eliminate them.
Calculate the minimum volume of oxygen gas, at room temperature and pressure(r.t.p). required to completely burn 56g of methane gas. Give your answer to two significant figures. (1 mole of any gas occupies 24 dm³ at r.t.p,Ar:C=12,H=1)
BALANCED EQUATION FOR THE BURNING OF METHANE GAS.
CH₄+2O₂→CO₂+2H₂O
Answer:
170 dm³ (2 significant figures)
Explanation:
CH₄ + 2O₂ → CO₂ + 2H₂O
We need to find how much 'volume' of O₂ is required to burn 56 g of CH₄.
Let's take the ratios of the two gases only.
CH₄ : 2O₂ (in terms of moles the ratio is 1:2)
56g : x dm³
Mr of CH₄ : Volume of oxygen at rtp
Find the Mr of CH₄.
Mr of CH₄ = 12 + (1 × 4) = 16
We know that 1 mole of any gas occupies 24 dm³ at room temperature and pressure (rtp). We have to find the volume of oxygen, there are 2 moles of oxygen, so 2 moles of gas will occupy:
2 × 24 = 48 dm³
56g : x dm³
16 : 48 dm³
16x = 56 × 48
16x = 2688
x = [tex]\frac{2688}{16}[/tex]
x = 168 dm³
∴ the minimum volume of oxygen gas, at room temperature and pressure required to completely burn 56g of methane gas is 170 dm³
for the reaction 2nh3(g)↽−−⇀ 3h2(g)+n2(g), if 15.8 grams of ammonia produced 1.87g of hydrogen, what was the percent yield
Answer:
75%
Explanation:
So, the reaction will consume 1 mole of hydrogen gas and produce
1mole H2⋅2 moles NH33moles H2=0.667 moles NH3
at 100% yield. This represents the reaction's theoretical yield.
Now, you know that the reaction produced 0.50 moles of ammonia. This represents the reaction's actual yield.
In order to find the percent yield, you need to figure out how many moles of ammonia are actually produced for every 100 moles of ammonia that could theoretically be produced.
You know that 0.667 moles will produce 0.50 moles, so you can say that
100moles NH3.in theory⋅0.50 moles NH3.actual0.667moles NH3.in theory=75 moles NH3.actual
Therefore, you can say that the reaction has a percent yield equal to
% yield = 75%
__H2 + __SO2 —> __H2S + __H2O identify the proper coefficients
What is the Lewis structure for Iodide?
Answer:
In the Lewis structure for IF5 you'll need to put a total of 12 valence electrons on the Iodine atom in order to draw the Lewis structure. Remember that Iodine (I) can hold more than eight valence electrons. For the IF5 Lewis structure, calculate the total number of valence electrons for the IF5 molecule
Explanation:
I be knowing hope this helps
arrange the compounds from lowest boiling point to highest boiling point.
Answer:
ion- ion> H - bonding > dipole > dipole> london dispersion
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Answer:
If it becomes buried deep into the earth and it is open to increased temperate and pressure. Then an Igneous rock could be Metamorphic. This process can take a lot of time but eventually the rock will change due to pressure andbhigher temperatures.
if a substance has a normal boiling point of 50 °c, what can you state about the vapor pressure of the same substance at 40 0 °c?
If the velocity of a wave is 12 m/s and its frequency is 600 hertz, what would be its wavelength?
Answer:
The wavelength is 0.02 m.
Step-by-step explanation:
Given :
[tex]\green\star[/tex] Velocity = 12 m/s[tex]\green\star[/tex] Frequency = 600 HzTo Find :
[tex]\green\star[/tex] WavelengthUsing Formula :
Apply Wavelength formula :
[tex]\star{\small{\underline{\boxed{\sf{\purple{\lambda = \dfrac{v}{f}}}}}}}[/tex]
[tex]\pink\star[/tex] λ = Wavelength [tex]\pink\star[/tex] v = Velocity [tex]\pink\star[/tex] f = FrequencySolution :
Finding the wavelength by substituting the values in the formula :
[tex]{\longrightarrow{\sf{\lambda = \dfrac{v}{f}}}}[/tex]
[tex]{\longrightarrow{\sf{\lambda = \dfrac{12}{600}}}}[/tex]
[tex]{\longrightarrow{\sf{\lambda = \dfrac{\cancel{12}}{\cancel{600}}}}}[/tex]
[tex]{\longrightarrow{\sf{\lambda = \dfrac{2}{100}}}}[/tex]
[tex]{\longrightarrow{\sf{\lambda = \cancel{\dfrac{2}{100}}}}}[/tex]
[tex]{\longrightarrow{\sf{\lambda = 0.02}}}[/tex]
[tex]\star{\underline{\boxed{\tt{\red{\lambda = 0.02 \: m}}}}}[/tex]
Hence, the wavelength is 0.02 m.
should i tell my parents i got C+ in chemistry or not ?
Who has an aesthetic room
2. The two naturally occurring isotopes of hydrogen are hydrogen-1 ( 1.00783 amu; 99.9885 percent) and hydrogen-2 (2.01410 amu; 0.0115 percent). What is the average atomic mass of hydrogen?
A. 1.0079 amu
b. 1.0097 amu
c. 1.0309 amu
D. 1.5110 amu
Answer:
1.0079 g/mol
Explanation:
99.989% / 100% = 0.99989 hydrigen-1 , 0.0115% / 100% = 0.000115 hydrogen-2
0.99989 x 1.0078 = 1.0077 , 0.000115 x 2.0141= 0.000232
1.0077 + 0.00023
Answer: 1.0079
What does one mole of h20 correspond to
Answer:
One mole of H2O corresponds to 18 g .
How many molecules of NO2 are in 0.36 moles?
Answer:
1 mol contains 6.022*10^23 molecules 0.36 moles contain 0.36 * 6.022*10^23 = 2.2 *10^23 molecules
Explanation:
What halogen can react with sodium chloride solution to produce chlorine?
Answer:
As electro-negativity decreases from Florine to downwards in the group and only Florine is above Chlorine, so Florine should react with sodium chloride solution to produce chlorine.
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Two samples of solids have similar reactivity with acids and similar densities. Their masses
and volumes, however, are not at all similar. Is it possible that these are the same
substance? (1 point)
O. No, it is not possible because they have different extensive properties.
O Yes, it is possible because they have similar intensive properties.
O Yes, it is possible because they have similar extensive properties.
O No, it is not possible because they have different intensive properties.
They may be the same substance even though they have different volumes and masses.
Intensive properties are the properties are characteristic a substance. Intensive properties are those properties of a substance that can be used to describe the substance.
We can see that the substances have similar reactivity and similar density. This means that they may be the same substance even though they have different volumes and masses.
The correct option is; "Yes, it is possible because they have similar intensive properties."
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Find the molar mass of iron (III) nitrate, Fe(NO3)3
Answer:
Hey there are you doing are you doing I will tell you the answer
can someone please explain how to find an emperical formula given mass not percentage?
Answer:
1. Get the mass of each element by assuming a certain overall mass for the sample (100 g is a good mass to assume when working with percentages). ...
2. Convert the mass of each element to moles. ...
3. Find the ratio of the moles of each element. ..
4. Use the mole ratio to write the empirical fomula
Answer:
Multiply each result by the given mass.
Explanation:
Hi!
In order to find percent/mass composition you would
1. write the formula
2. calculate the molar mass for each equation
3. add all the masses to get the compound molar mass
4. divide each molar mass by the total mass
and then for mass composition, you would multiple eachy result by the given mass.
For example;
Calculate the number of grams of gold in 89.6 grams of gold(1) perchlorate.
Your formula would be AuClo4
Au : 196.96 x 1
Cl: 35.4 x 1
O: 16 x 4
Add the masses together to get 296.5 g/mol
Lets say we're looking for Oxygen. You would take what you got (16 x 4) and divide it by the total mass. 64/296.5
This would equal 0.215. Instead of multiplying this by 100 like you would for percent, for mass you would multiply by what is given. in this instance it is 89.6.
0.215 x 89.6 = 19
But the question is asking for gold,
197/296
= 0.664 x 89.6
= 59.5
Your answer would be 59.5 grams Au
Hope this helped! : D
How many atoms le aluminum are in this compound
What is the chemical formula for nitrogen monoxide?
Answer: the formula is NO
What do Cl-35 and Cl-36 have in common?
Answer:
they have same atomic number as they are the same element & electrons
Answer: they both have the atomic (proton number) as they are the same element hence they also they have the same number of electrons. Therefore they have similar chemical properties, as the electrons determine the chemical property of an element.
Explanation: The numbers 35 and 37 are the mass numbers for the two isotopes of chlorine. They both have the same atomic number (proton number ) as they are the same
where does oxidation occur in an electrochemical cell
how do particles in the most rigid state of matter move
Explanation: In solids, particles are very closely packed in an orderly arrangement in a lattice and only vibrate in fixed positions. The forces of attraction between them are very strong. This allows them to overcome the forces of attraction that hold the other phases closer together
Will give 10 points.
Why does an atom have a neutral charge?
A It has equal numbers of electrons and protons.
B. The number of neutrons equals the number of protons and
electrons in the atom.
C. It has equal numbers of electrons and neutrons.
D. It has equal numbers of neutrons and protons.
Answer:
option A it has equal numbers of electrons and protons
Explanation:
electrons are negatively charged and protons are positively charged, so if the numbers of each are equal, then the atom will be neutral.
Answer:
A. it has equal numbers of electrons and protons
Explanation:
The overall charge of every atoms is neutral because the number of electrons and protons is the same. Protons are positively charged while electrons are negatively charged and so they cancel out.
4. Public water supplies are unsafe in some parts of the world because the water
and
may carry
Answer:
In many parts of the world, water taken directly from wells or public supplies is not safe to drink because it may carry waterborne parasites or other diseases. The water can be sterilized by boiling it, but fuel is needed to do so.
Explanation:
Answer: Public water supplies are unsafe in some parts of the world because the water may carry bacteria.
Explanation:
what should you do if your bunsen burner does not light after a few tries with the striker?
5 Stoichiometry Chemistry questions !
1. Determine the mass in grams of lithium hydroxide produced when 0.38 g of lithium nitride reacts. g LiOH
Li3N(s) + 3 H2O(l) --> NH3(g) + 3 LiOH(aq)
2. How many moles of sodium chloride are produced when 2.9 grams of sodium iodide reacts? mol NaCl
2 NaI(s) + Cl2(g) --> 2 NaCl(s) + I2(g)
3. What volume in liters of chlorine gas at STP would be required to fully react with 125 g of NaI? L Cl2
2 NaI(s) + Cl2(g) --> 2 NaCl(s) + I2(g)
4. Determine the volume in liters of carbon dioxide produced at STP when 0.85 grams of butane (C4H10) reacts. L CO2
2 C4H10(l) + 13 O2(g) --> 8 CO2(g) + 10 H2O(g)
5. Calculate the mass in grams of water vapor produced by the combustion of 51.3 L of propane, C3H8, at STP. g H2O
C3H8(g) + 5 O2(g) --> 3 CO2(g) + 4 H2O(g)
What is the enthalpy of combustion when 1 mol C6H6(g) completely reacts with oxygen? 2C6H6(g) 15O2(g) mc001-1. Jpg 12CO2(g) 6H2O(g) â€""6339 kJ/mol â€""3169 kJ/mol 1268 kJ/mol 6339 KJ/mol.
The enthalpy of combustion of 1 mole of benzene is 3169 kJ/mol .
The first step in answering this question is to obtain the balanced thermochemical equation of the reaction. The thermochemical equation shows the amount of heat lost or gained.
The thermochemical equation for the combustion of benzene is;
2 C6H6(l) + 15 O2(g) → 12 CO2(g) + 6 H2O(g) ΔrH° = -3169 kJ/mol
We can see that 1 mole of benzene releases about 3169 kJ/mol of heat.
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Answer:
-3169 kJ/mol
Explanation:
Does the amount of mentos affect the height of the pop explosion
Answer:
no
Explanation:
bcuz science
Answer:
The more mentos you put in a bottle of pop does not necessarily mean a larger explosion. The max amount of mentos with the largest explosion was 4 mentos, it went 350 cm high. With 5 or 6 mentos the explosion went only 330 and 310 cm high.
Hope this helped in some way?
which is the correct formula for the compound dinitrogen monoxide?
Answer: Dinitrogen Monoxide ( also called nitrous oxide )
is an inorganic ( not made from living matter) compound with the chemical formula of N2O.
Explanation:
Read above