Answer:
b) 58.6
Explanation:
1ml = 1cm³
74.2 x 0.790 = 58.618g
What did Josh do that allowed him to dissolve that much sugar in only 100 g of water?
Josh used sugar cubes instead of granulated sugar.
Josh used a pan with a large surface area.
Josh stirred the solution.
Josh heated the water.
Answer:
heated the water
Explanation:
what is non electrlyte
A gas occupies 200cm^3 at 15°c and 750mmHg
What volume will it occupy at 50°C and 700mmHg
Answer:
357.14 cm^3
Explanation:
From Law of Proportions,
P1V1/T1 = P2V2/T2
750 x 200 / 15 = 700 x V2 / 50
50 x 200 = 14 x V2
V2 = 10000 / 14
= 5000 / 14
= 357.14
The volume occupied by 9 x 1023 molecules of nitrogen gas at STP is closest to
1.5 L
22.4 L
33.6 L
0.5 L
This problem is providing the number of molecules of nitrogen at STP and asks for the volume they take up. At the end, the result turns out to be 33.6 L according to the following.
Avogadro's lawIn chemistry, gas laws are used to relate pressure, temperature, volume and moles as an indicator of the behavior of gases. Thus, since this problem provides the number of molecules of nitrogen gas at STP, standard pressure and temperature (1atm and 273K), one knows the Avogadro's law must be utilized.
In such a way, this law allows us to know that 1 mole of any substance is related to 6.022x10²³ particles and that 1 mole of the gas occupies 22.4 L at STP. Hence, we can find the volume with the following setup:
[tex]9x10^{23}molecules*\frac{1mol}{6.022x10^{23}molecules} *\frac{22.4L}{1mol} \\\\=33.5L[/tex]
Which can be rounded then to 33.6 L.
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Need Help ASAP Please! The Answer Needs To Be Numerical
A student ran the following reaction in the laboratory at 546 K:
COCl2 (g) CO (g) + Cl2 (g)
When she introduced 0.723 moles of COCl2 (g) into a 1.00 liter container, she found the equilibrium concentration of Cl2 (g) to be 3.38×10-2 M.
Calculate the equilibrium constant, Kc, she obtained for this reaction.
Kc =
This problem is providing an equilirium reaction with the initial concentration of COCl2 and the equilibrium concentration of Cl2 for us to calculate the equilibrium constant. At the end, the result is 0.00166.
Chemical equilibriumIn chemistry, not all chemical reactions turn out into completion yet reach a point of constant concentrations (conversion) called equilibrium. In such a way, since this problem is based on this phenomenom, we can start by setting up the equilibrium expression:
[tex]Kc=\frac{[CO][Cl_2]}{[COCl_2]}[/tex]
Where each concentration is at equilibrium. Now, since all these species are in 1:1 mole ratio, we can see that the cocentration that changed up to equilibrium is 3.38×10⁻² M (Cl2's concentration), and thus we can calculate Kc with:
[tex]Kc=\frac{(3.38x10^{-2}M)(3.38x10^{-2}M)}{(0.723M-3.38x10^{-2}M)}\\\\Kc=0.00166[/tex]
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2 Cuso, +4 KI → 2 Cul +2 K,SO, + 12 9.
When 6.76 g of Cuso, reacts with 9.82 g of KI, how many grams of I, will be produced? 10. What is the limiting reactant?
How many grams of copper (1) iodide is made?
What mass of excess reactant remains?
If 3.5grams of iodine is produced, what is the percent yield?
What is the molecular formula of a molecule that has a molecular mass of 180.8 g/mol and an empirical formula of CH2O?
Answer:
The compound is "C6H12O6"
Explanation:
we know the relation that
Molecular formula mass = n. (Empirical formula mass)
180.8=n(30.0156)
n= 6
So
Molecular formula = n. (Empirical formula)
Molecular formula= 6 ( CH2O)
Molecular formula = C6H12O6
What is the formula for iron (II) sulfate hexahydrate?
The formula for iron (II) sulfate hexahydrate
[tex]is[/tex]
FeH12O10S
Which of the following best defines Avogadro's number?
Mass, in grams, of each particle of the substance
Number of particles in one mole of a pure substance
O Mass, in grams, of the nucleus of the substance's atoms
Total mass, in grams, of all the particles in one mole of the substance
Avogadro's number is the number of particles in one mole of a pure substance.
What is Avogadro's number?The Avogadro number or constant was ned after an Italian scientist that discovered it and He is called Amedeo Avogadro. It is the the number of particles in one mole of a substance or it can be refer to the proportionality factor that of a number of constituent particles in a sample with the amount of substance contained in the sample. Its SI unit = 6.02214076×10²³ mol⁻¹.
Therefore, Avogadro's number is the number of particles in one mole of a pure substance.
Learn more about Avogadro number from the link below.
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A sample of Ne gas occupies 0.220L at 0.86 atm. What will be its volume at 29.4kPa?
Answer:
0.66 L
Explanation:
Here it's given that a sample of Neon occupies a volume of 0.220 L at 0.86 atm . And we need to find out its volume at 29.4 kPa .
If we assume temperature to be constant , then we can apply Boyle's Law , which states that ,
" For a fixed amount of gas at constant temperature , pressure is inversely proportional to the volume . "
Mathematically ,
[tex] P \propto \dfrac{1}{V}[/tex]
Taking k as constant ,
[tex] P =\dfrac{k}{V}[/tex]
And we can say that ,
[tex] P_1 V_1 = P_2V_2[/tex]
Here ,
P_1 = 0.87 atm P_2 = 29.4 kPa = 29400 PaAs we know that ,
[tex] 0.987 atm = 10^5\ Pa [/tex]
So ,
[tex] 29400 Pa = 0.29 \ atm [/tex]
V_1 = 0.220 L V_2 = ?So that ,
[tex] (0.87 atm )(0.220L) = (0.29atm)(V_2)\\[/tex]
[tex] V_2 = \dfrac{0.87 \times 0.220}{0.29} L [/tex]
Simplify ,
[tex] V_2 = 0.66\ L [/tex]
Hence the new Volume of the gas is 0.66 L .
I hope this helps.
what colud the crew of a hot air balloon do to raise the ballon above some trees
Explanation:
Hot air balloons work because hot air rises. By heating the air inside the balloon with the burner, it becomes lighter than the cooler air on the outside. This causes the balloon to float upwards, as if it were in water.
In response to the upward buoyant force, the hot air in the balloon rises.
What is meant by air buoyancy?The upward force that an object experiences from the air it displaces is known as air buoyancy.
Here,
Due to the fact that hot air is less dense than cold air of similar volume, the heated air causes the balloon to rise. Hot air balloons and blimps benefit from buoyancy, which is the air's upward force that keeps them in the air.
The wind determines the balloon's flight path, but the temperature of the air inside the envelope can be changed to alter the balloon's altitude. In order to raise the temperature inside the envelope and increase lift, the pilot may open one or more burner blast valves, causing the aircraft to ascend, slow down, or stop its descent.
If the envelope has a vent, the pilot can also open it to let hot air escape, which will lower the temperature inside the envelope and reduce lift, allowing the aircraft to descend or slow down or cease ascending.
If the pilot doesn't take action, the air inside the envelope will gradually cool through seepage or contact with cooler outside air and give less lift.
Hence,
In response to the upward buoyant force, the hot air in the balloon rises.
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What type of heat transfer drives plate tectonics?
Answer:
Convection, or the flow of mantle material transporting heat, drives plate tectonics.
Explanation:
Have a nice day !!! :)
Identify the following reactions as combination, decomposition, or combustion reactions
C7H8 + 9O2 → 7CO2 + 4H2O ______________
2NaHCO3 → Na2CO3 + H2O + CO2 ___________
CH4 → C + 2H2O ________________
P4O10 + 6H2O → 4H3PO4 ______________
FeSO4 → FeO + SO3 _______________
CaCO3(s) → CO2(g) + CaO(s) _________________
Answer:
[tex]{ \rm{C _{7} H _{8} + 9O _{2} → 7CO _{2} + 4H _{2}O : { \tt{combustion}}}} \\ \\ {\rm{2NaHCO _{3} → Na_{2}CO _{3} + H_{2}O + CO_{2} : { \tt{decomposition}}}} \\ \\ { \rm{CH _{4} → C + 2H _{2} O :{ \tt{decomposition}} }} \\ \\ { \rm{P _{4}O _{10} + 6H _{2}O → 4H _{3} PO _{10} :{ \tt{combination}} }} \\ \\ { \rm{FeSO _{4} → FeO + SO _{3} : { \tt{decomposition}} }} \\ \\ { \rm{CaCO _{3(s)} → CO _{2(g)} + CaO _{(s)} : { \tt{decomposition}}}}[/tex]
pls done it i will mark brainliest
Answer:
outside, ininside, outExplanation:
The name of an aqueous solution of H2S is
The name of an aqueous solution of [tex]H_{2}S[/tex] is "hydrogen sulfide solution" or "sulfhydric acid solution."
It is a chemical formula which represents the compound hydrogen sulfide, which consists of two hydrogen atoms bonded to a sulfur atom. When [tex]H_{2} S[/tex] dissolves in water ([tex]H_{2}O[/tex]), forms an aqueous solution.
The naming for acid solutions is based on the corresponding acid's name. Here, H2S is an acid called sulfurous acid. The -ous suffix is used to refer to an acid derived from a non-oxygen-containing anion, here, the sulfide anion (S2-). When acid is dissolved in water, the resulting solution is called as "sulfurous acid solution."
Therefore, the name for an aqueous solution of H2S is "sulfurous acid solution."
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What was the purpose of the experiment of cellular respiration
Answer:
Cellular respiration is used to create usable energy from the foods that living things eat. It's important to know that the reactions involved in cellular respiration are catabolic, meaning they break down molecules into smaller ones. This differs from anabolic reactions, which build bigger molecules from smaller ones
if I put elephant toothpaste in a back yard what would happen? I need help on this pls!!! also if you answered this ty!!
Answer:
the elephant toothpaste would go everywhere
Calculate the mass of one mole of
(a) calcium atoms.
(b) oxygen molecules.
Anyone can help me ? Thanks
Answer:
(a) Molar mass of ca= 40g/mol
(b) O2= 16 * 2 = 32g/mol
What is the percent composition of oxygen in lithium oxide?
Answer: 72.71%
Explanation:
The volume of a container increases from 5L to 9L. What is the final pressure if the original pressure was 11 atm
Answer:
6.11 atm
Explanation:
P1V1=P2V2
(11)(5) = (P2)(9)
55/9 = 6.11 atm = P2
From the reaction given, which of the following is a conjugate acid-base pair. pls help.
I don't do physics in school guyz so please
A small-sized woman has 6.4 x 10-3 moles of hemoglobin (molar mass of hemoglobin = 64, 456 g/mol) in her blood. Show your work
How many hemoglobin molecules are in this person’s body?
What is the mass (g) of hemoglobin molecules in this person’s body?
Answer:
Explanation:
Interesting question - especially if you are afflicted by something like Leukemia where it pays to know everything you can about Hemoglobin.
Molecules
1 mole of anything has 6.02 * 10^23 in this case molecules
6.4*10^-3 moles has x number of molecules
Set up the proportion
1/6.4*10^-3 = 6.02 * 10^23 molecule / x Cross Multiply
x = 6.4*10^-3 * 6.02 * 10^23
x = 3.853*10^21 molecules
Mass Hemoglobin
1 mol of hemoglobin is 64456 grams
6.4*10^-3 moles = x grams Cross multiply
x = 64456 * 6.4*10^-3
x = 412.5 grams of hemoglobin in this woman's body.
If you are American and think in pounds, then this is roughly a pound of hemoglobin.
Considering that you need hemoglobin to carry oxygen around to various organs, it is not an awful lot. That's the miracle of the human body.
SEP Define a Problem The test tubes
contain water (A) and three copper
sulfate solutions (B-D) with increasing
concentration. Why is it difficult to say
whether solution C is a concentrated
solution or a dilute solution? How can we
better define the problem?
We can better define the problem by saying that solution is concentrated or diluted with respect to solution B or D respectively.
ConcentrationThe concentration of solution C lies somewhere between that of B and D.
Thus, if we are to qualify the concentration of solution C with respect to that of B, we will say it is concentrated.
If we are to qualify the concentration of solution C with respect to that of D, we will say solution C is diluted.
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Describing types of chemical bonds Match each bond with the rearrangement of the valance electrons needed to form that bond metallic bond ionic bond covalent bond sharing of electrons sharing of many electrons transferring of electrons
Answer:
metallic bond —> sharing of many electrons
covalent bond —> sharing of electrons
ionic bond —> transferring of electrons
Explanation:
im not 100% sure this is right but i hope it still helps!
Please help me please
Answer:
I can help you with that... I cannot screenshot your question... what you can do is send me that PDF
Is Aspartame (C14H18N2O5) held together through ionic or covalent bonds? Explain your reasoning.
Answer:
Covalent
Explanation:
There are 14 carbon atoms which are much more.Carbon has tetravalent structure and valency is 4 .Carbon never forms ionic compounds .So it's Covalent bonded compound.Fill in the reaction type and predicted products for:
C8H18 (l) + O2 (g) → ??
Type in the IUPAC name or formula for each product.
Write subscripts as normal numbers.
If there is no second product, type "nothing".
The reaction type is
Question Blank 1 of 3
.
The correct products are:
Question Blank 2 of 3
and
Question Blank 3 of 3
Answer:
nothing
Explanation:
5227 grams of iron is how many moles?
Answer:
93.7
Explanation:
moles = mass ÷ relative atomic mass
mass = 5227g, relative atomic mass of Fe = 55.8
moles = 5227 ÷ 55.8 = 93.7 (1dp)
why do we measure the mass of ten pennies instead of the mass of one penny ?
Enter your answer in the provided box.
Calculate the molarity of 6.14 g of LiNO3 in 505 mL of solution.
Answer: 0.18
Explanation:
the molarity equation is moles of solute over L of solution:
mol (solute)/L (solution
so you need to convert 6.14g of LiNO3 into moles so:
6.14g LiNO3 • 1 mol
———— = 0.0890552 mol
68.946g LiNO3 (molar mass)
then you need to convert 505ml to L:
505/1000= 0.505
then you just follow the equation
0.0890552 mol / 0.505 L = 0.17634694 or 0.18 for sigfigs
0.18 M
hope this helps :)