Answer:
A molecular compound is composed of two or more non metallic elements that are held together by covalent bonds.
The two major characteristics of molecular compounds are;
1.) They are held by covalent bonds
2.) They generally have poor conductivity
Explanation:
A molecular compound is one where two or more molecules come together to form a compound. Unlike ionic compounds that combine by the transfer of electrons, molecular compounds form by sharing electrons. The pairing of the electrons is what holds the molecules together and is known as covalent bonding.
A molecular compound has various characteristics, some of which are;
- Generally low melting and boiling points
- Soft solid forms
- Low enthalpy of fusion and vaporization.
But the two major characteristics of molecular compounds are;
1.) They are held together by covalent bonds.
The elements in a molecular compound share their electrons by having their atoms bond chemically to each other.
2.) They generally have poor conductivity
Molecular compounds do not conduct electricity and heat properly. Because they are formed by sharing electrons, they usually have no free electrons left to conduct electricity.
The picture shows a community living in a dry, grassy area. A few organisms have died off due to lack of a water source. ******Is this an example of an abiotic or biotic limiting factor? WHY
Answer:
brainly blurred the half of the question i cant read it completely
Explanation:
A sample of gas is kept at a temperature of 300 k, a volume of 1.45L, and a pressure of 3.00 kPa. How many moles of has are in the sample
Answer:
the number of moles of the gas is 0.00174 mol.
Explanation:
Given;
temperature of the, T = 300 K
volume of the gas, V = 1.45 L
Pressure of the gas, P = 3.0 kPa
The number of moles of the gas is calculated using Ideal gas equation, as follows;
PV = nRT
Where;
n is number of moles of the gas
R is the ideal gas constant, = 8.315 L.kPa/mol.K
n = PV / RT
n = (3 x 1.45) / (8.315 x 300)
n = 0.00174 mol.
Therefore, the number of moles of the gas is 0.00174 mol.
define the term pure substance
Answer:
Pure substances are substances that are made up of only one kind of particles and has a fixed or constant structure. Pure substances are further classified as elements and compounds. An element is a substance that consists of only one type or kind of atom
Answer:
define the term pure substance :
A pure substance does not have to be of a single element or compound, This can either be one single element or one single compound, but every sample of this substance that you examine must contain exactly the same thing with a fixed, definite set of properties
Explanation:
PLSSS ANSWERRRRR????
Iron (III) nitrate (Fe(NO3)3) solution reacts with sodium hydroxide (NaOH) solution to form a
brown precipitate of iron (III) hydroxide (Fe(OH)3). Sodium nitrate (NaNO3) remains in solution as
it is a soluble compound.
Write the word equation and the balanced formula equation for this reaction.
Answer:
Fe(NO3)3 + 3 NaOH ===》Fe(OH)3 + 3 NaNO3
How does the rate of a chemical reaction change if the concentration of both reactants increases 4 times?
2NO + O2 → 2 NO2
Answer: The rate will increase 32 times if the concentration of both reactants increases 4 times
Explanation:
Rate law says that rate of a reaction is directly proportional to the concentration of the reactants each raised to a stoichiometric coefficient determined experimentally called as order.
For the reaction : [tex]2NO+O_2\rightarrow 2NO_2[/tex] [tex]rate=k[NO]^2[O_2]^1[/tex]
k= rate constant
order with respect to [tex]NO_2[/tex] = 2
order with respect to [tex]O_2[/tex] = 1
Thus on increasing the concentration of reactants 4 times :
[tex]rate'=k[4\times NO]^2[4\times O_2]^1[/tex]
[tex]rate'=k\times 8\times 4\times [NO]^2\times [O_2]^1[/tex]
[tex]rate'=32\times rate[/tex]
Thus rate will increase 32 times if the concentration of both reactants increases 4 times
Rank from largest to smallest equilibrium constant. To rank items as equivalent, overlap them KBr2, KCl2, KI2
Answer:
KCl[tex]_{2}[/tex], > KBr[tex]_{2}[/tex], > KI[tex]_{2}[/tex]
Explanation:
KBr[tex]_{2}[/tex], KCl[tex]_{2}[/tex], KI[tex]_{2}[/tex]
The equilibrium constant for the reaction between Alkene and Halogen to give Alkyl halide as a product
Keq = [tex]\frac{[C2H4X2 ]}{[C2H4 ][ X2]}[/tex]
hence the order of equilibrium from the Largest to the smallest equilibrium
= KCl[tex]_{2}[/tex], > KBr[tex]_{2}[/tex], > KI[tex]_{2}[/tex]
Under which condition will the atmospheric pressure be greater. When the air is cold, or when the air is warm
What conversion factor will help solve the problem?
2HgO → 2Hg + O2
How many moles of mercury (II) oxide are needed to make 125 grams of O2
125 g O2 x ___1 mol__O2 x ____________ = mols HgO
32.00 g O2
a
2 mol Hg
1 mol O2
b
216.6 g HgO
1 mol HgO
c
1 mol O2
2 mol HgO
d
2 mol HgO
1 mol O2
Answer:
i fond nothing sooory
pic so PC
pick one answer please do not put any links just type the answer
The image shows two spheres hung from a thin rope. The spheres do not affect each other.
What is most likely true about these spheres?
-Both spheres are neutral.
-Both spheres have a positive charge.
-Both spheres have a negative charge.
-One sphere has a positive charge, and the other has a negative charge.
Answer:
both spheres have a positive charge
PLEASE HELP I'M SO DOOMED
A balloon that contains 2.8 mol of helium gas has a volume of 31 L. If 3.5 g of helium is added, what will be the new volume of the balloon? Assume the temperature and pressure remain the same. The molar mass of helium is 4.00 g/mol.
a) 186 L
b) 70 L
c) 24 L
d) 41 L
Do not post links
Answer:
D
Explanation:
31 / 2.8 = 11.0714286 L per mole of helium
3.5 / 4 = 0.875 moles
2.8 + 0.875 = 3.675 moles
11.0714286 x 3.675 = 40.6875 L
What is the formation of gas is an example of?
Answer:
The formation of a gas is a clue to chemical changes. The bubbles of gas that you observed form when an antacid is dropped into water is an example of change. ... As wood burns, it turns into a pile of ashes and gases that rise into air.
Explanation:
PLEASE HELP ME WITH PHYSICAL SCIENCE!! PRETTY EASY QUESTION
Explanation:
Bbbbbbbbbbbbbbbbbbbbb
Answer:
B.
Explanation:
the substance would still be pure because both of the atoms are natural
it wouldnt create something pure or new it would just combine
so it would be B
hope this helps!
~goldfishareswag/brianna
:)
Read the temp what is it?
17.3 or 17.25??
Answer:
I would say 17.25.
Explanation:
I NEED HELP PLEASE THANK YOUUU
I think the answer is c if not then try a
Answer: B
Explanation:
Definition:This is a type of lab equipment in which students use probes, interfaces, and software for real-
time data acquisition, display, and analysis with a computer or calculator
What is the term?
What is the mass in grams of the following measurements? 1.00 mol Al ___________ 6.02 x 10 23atoms Al ___________
Answer:
Mass of 1 mole of Aluminium = Mass of 6.02 x 10 23atoms of Aluminium = 26.98 grams.
Explanation:
1 mole of any element or molecule has 6.02 x 10 23atoms or subparts.
Hence 1 mole of aluminum will also have 6.02 x 10 23atoms. Hence, it is clear that mass of 1 mole of Aluminium will be equal to 6.02 x 10 23atoms of Aluminium.
Thus,
Mass of 1 mole of Aluminium = Mass of 6.02 x 10 23atoms of Aluminium = 26.98 grams.
where are human cells located (in living organisms)
Regions that receive up to 20 inches of rainfall per year are referred to as __________ because they receive more precipitation than most deserts.
semiarid deserts
polar deserts
coastal deserts
subtropical deserts
Answer:
The answer is in fact semi-arid deserts. This just serves as a confirmation cause sometimes the answers be wrong.
Semiarid deserts is the region that receive up to 20 inches of rainfall per year.
What is Rainfall?
This is defined as the amount of precipitation in the form of water droplets that falls onto the surface of Earth from the clouds due to gravity influence.
Semi-arid desert receive more precipitation which is around 20 inches of rainfall than most deserts.
Read more about Semi arid deserts here https://brainly.com/question/3363067
What does the word omniphobic mean?
Answer:
Special type of surface that repels liquid
Explanation:
What is the formula to find
moles
Explanation:
these are the formula that u need to know
1. moles= concentrate × volume
2. moles = mass / mr
3. moles = volume in dm3 / 24dm^3
4. moles = Pressure in pa × Volume in m3 / 8.031 × temperature in K
hope this helps :)
A 3.4 g sample of an unknown monoprotic organic acid composed of C,H, and O is burned in air to produce 8.58 grams of carbon dioxide and 1.50 grams of water vapor. It was also determined that 279 mL of 0.1 M KOH was needed to titrate the acid completely.
Answer:
[tex]C_7H_6O_2[/tex]
Explanation:
Hello there!
In this case, we can divide the problem in three stages: (1) determine the empirical formula with the combustion analysis, (2) compute the molar mass of acid via the moles of the acid in the neutralization and (3) determine the molecular formula.
(1) In this case, since 8.58 g of carbon dioxide are released, we can first compute the moles of carbon in the compound:
[tex]n_C=8.58gCO_2*\frac{1molCO_2}{44.01gCO_2}*\frac{1molC}{1molCO_2}=0.195molC[/tex]
And the moles of hydrogen due to the produced 1.50 grams of water:
[tex]n_H=1.50gH_2O*\frac{1molH_2O}{18.02gH_2O}*\frac{2molH}{1molH_2O} =0.166molH[/tex]
Next, to compute the mass and moles of oxygen, we need to use the initial 3.4 g of the acid:
[tex]m_O=3.4g-0.195molC*\frac{12.01gC}{1molC}-0.166molH*\frac{1.01gH}{1molH} =0.89gO\\\\n_O=0.89gO*\frac{1molO}{16.0gO}=0.0556molO[/tex]
Thus, the subscripts in the empirical formula are:
[tex]C=\frac{0.195}{0.0556}=3.5 \\\\H=\frac{0.166}{0.0556}=3\\\\O=\frac{0.0556}{0.0556}=1\\\\C_7H_6O_2[/tex]
As they cannot be fractions.
(2) In this case, since the acid is monoprotic, we can compute the moles by multiplying the concentration and volume of KOH:
[tex]n_{KOH}=0.279L*0.1mol/L\\\\n_{KOH}=0.0279mol[/tex]
Which are equal to the moles of the acid:
[tex]n_{acid}=0.0279mol[/tex]
And the molar mass:
[tex]MM_{acid}=\frac{3.4g}{0.0279mol} =121.86g/mol[/tex]
(3) Finally, since the molar mass of the empirical formula is:
7*12.01 + 6*1.01 + 2*16.00 = 122.13 g/mol
Thus, since the ratio of molar masses is 122.86/122.13 = 1, we infer that the empirical formula equals the molecular one:
[tex]C_7H_6O_2[/tex]
Best regards!
what do a bald eagle, a komodo dragon, and a lizard have in common
Answer:
All of them derive from a common ancestor. They each share something in their DNA that ties into their past selves, which were more closely related. As they evolved, they became more and more distant, but we can still trace them back to the olden days.
Also they all have scales.
Hope this was at least semi-useful.
Can someone please answer this?
Answer:
B) go look on the periodic table for the atomic number
Explanation:
The atomic number is how many protons is in an atom
Answer:
Either A or B
Explanation: Because I learned it on Edge. :)
Circle the letter next to each sentence that is true concerning the compressibility of gases. a. The large relative distances between particles in a gas means that there is considerable empty space between the particles. b. The assumption that particles in a gas are relatively far apart explains gas compressibility. c. Compressibility is a measure of how much the volume of matter decreases under pressure. d. Energy is released by a gas when it is compressed.
Answer:
The large relative distances between particles in a gas means that there is considerable empty space between the particles.
The assumption that particles in a gas are relatively far apart explains gas compressibility.
Compressibility is a measure of how much the volume of matter decreases under pressure.
Energy is released by a gas when it is compressed
Explanation:
The kinetic molecular theory establishes that gases are composed of molecules. These molecules of gas are far apart from each other hence there is a considerable empty space between the gas molecules. As a result of these empty spaces between gas molecules, it is possible to compress a gas.
Compressibility is defined as a measure of how much the volume of matter decreases under pressure. When a gas is compressed, work is done on the gas and energy is evolved hence the gas heats up.
A. How do the following factors affect the spontaneity of a reaction?
i. Enthalpy
ii. Entropy
The actual value for absolute zero in degrees Celsius is −273.15. Use the formula below to determine your percent error for both gas samples.
|experimental value – actual value| x 100
actual value
Please just tell me how to find the experimental value
Answer:
As you noticed, the percent-error formula needs you to use a value in the ... The actual absolute zero is 275C below my coldest recorded value. ... The only way your calculations makes sense is you're trying to calculate how ... Next, I'll interpret "I found that AZ is at -258°C" as "I calculated AZ to be 260 degrees below 2°C".
Explanation:
The experimental error will be 8.95%
Calculating percentage error.The formula used for calculating the percentage error is expressed as:
[tex]\% error=\frac{|exp. \ value - actual \ value|}{actual \ value} \times 100[/tex]
Given the following parameters
Actual value = −273.15 degrees Celcius
Let the experimental value be 300 degrees Celcius (since we are not given)
[tex]\% error=\frac{|300 - 273.15|}{300} \times 100\\\% error=\frac{|26.85|}{300} \times 100\\\% error=8.95\%[/tex]
Hence the experimental error will be 8.95%
Learn more on experimental error here; https://brainly.com/question/2764830
Arrange the following compounds in order of DECREASING boiling points (going from the highest to the lowest):
n-butane
n-octane
2,2,3,3-tetramethyl-butane
2-butene
Answer:
b
d
a
c
Explanation:
More carbons in longest chain = higher BP
D has a BP of 0.8
A has a BP -0.5
C is the lowest because the more branched it is the lower BP
Can the solubility rules be used to find the state of any compound?
Answer:
yes
Explanation:
solubility rules allow prediction of what products will be insoluble in water.