Answer:
What’s the answer ♀️
Explanation:
What happens to sugar in a cup of tea?
Untitled Section
Which of the following is not a physical change? *
10
A. crushing
B. sublimation
C. rotting
D. deposition
Next
Page 29
Answer:
B.
Explanation:
Hope this helps.
How many mL of 0.2860 M sulfuric acid are required to react with 58.42 mL of 0.09756 M iron(III) hydroxide
Answer:
0.05978 mL of 0.2860 M sulfuric acid is required to react with 58.42 mL of 0.09756 M iron (III) hydroxide.
Explanation:
The balanced reaction between tha surfuric acid and iron (III) hydroxide is:
Fe(OH)₃ + 3 H₂SO₄ → Fe(HSO₄)₃ + 3 H₂O
By stoichiometry of the reaction (that is, the relationship between the amount of reagents and products in a chemical reaction), the following amounts of reactants and products participate in the reaction:
Fe(OH)₃: 1 mole H₂SO₄: 3 molesFe(HSO₄)₃: 1 mole H₂O: 3 molesBeing molarity (M) the number of moles of solute that are dissolved in a given volume:
[tex]Molarity=\frac{number of moles}{volume}[/tex]
then the number of moles can be calculated as:
number of moles= molarity* volume
So, if 58.42 mL ( 0.05842 L) of 0.09756 M iron (III) hydroxide react, then it means that the number of moles that react are:
number of moles= 0.09756 M* 0.05842 L
number of moles= 0.005699 moles
Now it is possible to apply the following rule of three: if by stoichiometry 1 mole of Fe(OH) ₃ reacts with 3 moles of H₂SO₄, then 0.005699 moles of Fe(OH) ₃ with how many moles of H₂SO₄ does it react?
[tex]moles of H_{2} SO_{4} =\frac{0.005699 moles ofFe(OH)_{3}* 3moles of H_{2} SO_{4} }{1mole ofFe(OH)_{3}}[/tex]
moles of H₂SO₄= 0.017097
Being sulfuric acid 0.2860 M, it is replaced in the definition of molarity:
[tex]0.2860M=\frac{0.017097 moles}{volume}[/tex]
Solving for the volume:
[tex]volume=\frac{0.017097 moles}{0.2860 M}[/tex]
volume= 0.05978 mL
0.05978 mL of 0.2860 M sulfuric acid is required to react with 58.42 mL of 0.09756 M iron (III) hydroxide.
A sample of nitrous Oxide has a volume of 1 £.20 at 1500 mm HG and -10°C. Calculators pressure when it’s value is compressed 250 L and its temperature increase to 34°c
Answer:
nitric acid will be if you get you will pixel purpose
Identify the two functional groups that react together to form the ester linkage between monomers in the PET polymer
Answer:
PET polymer or Polyethylene terephthalate is also known as Terylene. In the PET polymer, the ester linkage between the monomers is formed by the reaction of the OH group of ethylene diol (glycol) and the CO2H group of terephthalic acid.
In the family of polyester, PET is considered as the mostly used thermoplastic polymer resin.
It is used widely in clothing fibers, as liquid and food containers, and as a substance for engineering resins. In the United Kingdom it is known as terelyne, in the United States as Dacron, and in Russia as Lavsan.
Identify the following emission.
What happens when a covalent
substance dissolves in water?
and Why doesn’t it conduct electricity?
Answer: Covalent compounds form when atoms that have similar electronegativity values form covalent chemical bonds. When a covalent compound dissolves in water, it does not dissociate into ions. Because there are no free electrons or ions in the water (electrolytes) dissolved covalent compounds can't conduct electricity.
Explanation:
dude. g o o g l e.
Can anyone help me out with these questions? Thanks!!
The partial pressure of carbon dioxide in the atmosphere is 0.0318 kpa . Calculate the partial pressure in .Round answer to significant digits
Answer:
Partial pressure of carbon dioxide in the atmosphere = 0.0003184 atm (Approx)
Explanation:
Given:
Partial pressure of carbon dioxide in the atmosphere = 0.0318 kPa
Computation:
1 Kilo-pascal (kPa) = 0.00986923 atm
Partial pressure of carbon dioxide in the atmosphere = 0.0318 kPa
Partial pressure of carbon dioxide in the atmosphere = 0.0318 kPa x 0.00986923 atm
Partial pressure of carbon dioxide in the atmosphere = 0.0003184 atm (Approx)
Cyclopropane rearranges to form propene in a reaction that follows first order kinetics. At 800 K, the specific rate constant for this reaction is 2.74 x 10 - 3 s - 1. Suppose we start with a cyclopropane concentration of 0.290 M. How long will it take for 99.0 % of the cyclopropane to disappear according to this reaction
Answer:
1866.4 secs
Explanation:
The integrated rate law for first order kinetics is given by;
[A] = [Ao] ^-kt
Where;
[A] = concentration of cyclopropane at time = t
[Ao] = initial concentration of cyclopropane
k = rate constant
t = time taken
From the question, we are told that 99% of cyclopropane disappeared hence;
[A] = 0.290 - (0.99 * 0.290)
[A] = 0.290 - 0.2871
[A] = 0.0029 M
Hence
0.0029 = 0.290 e^-2.74 x 10^ - 3 * t
0.0029/0.290 = e^-2.74 x 10^ - 3 * t
0.01 = e^-2.74 x 10^ - 3 * t
ln(0.01) = -2.74 x 10^ - 3 * t
-4.61 = -2.74 x 10^ - 3 * t
t= -4.61/-2.74 x 10^ - 3
t = 1866.4 secs
Consider the equilibrium system described by the chemical reaction below, which has a value of Kc equal to 1.87 × 10⁻³ at a certain temperature. If 5.00 g of solid PH₃BCl₃ and 0.0700 g of BCl₃ are added to a 4.500 L reaction vessel, what will the equilibrium concentration of PH₃ be? SO CONFUSED BE VERY SPECIFIC especially WITH FINDING Qc.
Answer:
[PH₃(g)] = 0.0432M at equilibrium
Explanation:
Given: PH₃BCl₃(s) => PH₃(g) + PH₃(g); Kc = 1.87 x 10⁻³
*Let solids have concentration value = 1.0M and apply common ion (compound) effect to Ci b/c of 0.070g BCl₃ added initially.
PH₃BCl₃(s) => BCl₃(g) + PH₃(g
Ci: 5.00g 0.07g 0.00g
*≅1.0M(s) =0.07g/115.81g·mol⁻¹
= 6 x 10⁻⁶ mol
= 6 x 10⁻⁶mol/4.5L
= 1.3 x 10⁻⁴M = 0.00M
ΔC: -x +x +x
Ceq: 1M - x ≅ 1M = (1.3 x 10⁻⁴ + x)M = x
Kc = [BCl₃(g)][PH₃(g)] = (1.3 x 10⁻⁴ + x)(x) = 1.87 x 10⁻³
=> 1.3 x 10⁻⁴·x + x² = 1.87 x 10⁻³
=> x² + 1.3 x 10⁻⁴·x + 1.87 x 10⁻³ = 0
=> x = -b ± [Sqrt(b² - 4ac)] / 2a
=> x = -1.3 x 10⁻⁴ ± Sqrt[(1.3 x 10² - 4(1)(1.87 x 10⁻³)] / 2(1)
=> x = 0.0432M in PH₃ at equilibrium
Check:
Kc = [BCl₃(g)][PH₃(g)] = (1.3 x 10⁻⁴ + 0.0432)(0.0432) = 1.87 x 10⁻³ (QED)
What is the empirical formula of a compound containing 90 grams carbon, 11 grams hydrogen, and 35 grams nitrogen? (5 points)
Oa
C₃H₂N
Oь
C2HAN
CHION
Ос
Od
C₂ H₂N
Balance the following:
C₂ + B → B₂C₂
Ag₄ + SO₂ → AgO + S₂
Answer:
The balanced reactions are:
C₂ + 2B → B₂C₂
Ag₄ + 2SO₂ → 4AgO + S₂
Explanation:
The Law of Conservation of Matter postulates that "the mass is not created or destroyed, only transformed." This means that the reagents interact with each other and form new products with physical and chemical properties different from those of the reagents because the atoms of the substances are ordered differently. But the amount of matter or mass before and after a transformation (chemical reaction) is always the same, that is, the quantities of the masses involved in a given reaction must be constant at all times, not changing in their proportions when the reaction ends. In other words, then the mass before the chemical reaction is equal to the mass after the reaction.
In other words, the law of conservation of matter states that since no atom can be created or destroyed in a chemical reaction, the number of atoms that are present in the reagents has to be equal to the number of atoms present in the products.
Then, you must balance the chemical equation. For that, you must first look at the subscripts next to each atom to find the number of atoms in the equation. If the same atom appears in more than one molecule, you must add its amounts .
The coefficients located in front of each molecule indicate the amount of each molecule for the reaction. This coefficient can be modified to balance the equation, just as you should never alter the subscripts.
By multiplying the coefficient mentioned by the subscript, you get the amount of each element present in the reaction.
You have:
C₂ + B → B₂C₂
Left side: 2 C and 1 B.
Right side: 2 C and 2 B.
Carbon C is balanced since you have the same amount of the element on each side of the reaction, but boron B is not balanced. So, balancing the reaction:
C₂ + 2B → B₂C₂
Left side: 2 C and 2 B.
Right side: 2 C and 2 B.
Now you have the same amount of each element on each side of the reaction, so the reaction is balanced.
Now you have:
Ag₄ + SO₂ → AgO + S₂
Left side: 4 Ag, 1 S and 2 O.
Right side: 1 Ag, 2 S and 1 O.
Balancing the Ag:
Ag₄ + SO₂ → 4AgO + S₂
Left side: 4 Ag, 1 S and 2 O.
Right side: 4 Ag, 2 S and 4 O.
Balancing the O:
Ag₄ + 2SO₂ → 4AgO + S₂
Left side: 4 Ag, 2 S and 4 O.
Right side: 4 Ag, 2 S and 4 O.
You have the same amount of each element on each side of the reaction, so the reaction is balanced.
Mercury may have ice trapped in the crater floors near the planet’s north pole.
a. True
b. False
4. A 40.0L tank of ammonia has a pressure of 12.7 kPa. Calculate the volume of the
ammonia if its pressure is changed to 8.4 kPa while its temperature remains constant.
Answer:
V₂ = 60.47L
Explanation:
Given data:
Initial volume = 40.0 L
Initial pressure = 12.7 KPa
Final volume = ?
Final pressure = 8.4 KPa
Solution:
The given problem will be solved through the Boyls law,
"The volume of given amount of gas is inversely proportional to its pressure by keeping the temperature and number of moles constant"
Mathematical expression:
P₁V₁ = P₂V₂
P₁ = Initial pressure
V₁ = initial volume
P₂ = final pressure
V₂ = final volume
Now we will put the values in formula,
P₁V₁ = P₂V₂
12.7 KPa× 40.0 L = 8.4 KPa × V₂
V₂ = 12.7 KPa× 40.0 L/ 8.4 KPa
V₂ = 508 KPa. L / 8.4 KPa
V₂ = 60.47L
The volume of the ammonia gas if it's pressure is changed to 8.4 KPa is 60.5 L
From the question given above, The following data were obtained:
Initial pressure (P₁) = 12.7 KPa
Initial volume (V₁) = 40 L
Final pressure (P₂) = 8.4 KPa
Temperature = constant
Final volume (V₂) = ?Using the Boyle's law equation, the final volume of the ammonia can be obtained as illustrated below:
P₁V₁ = P₂V₂
12.7 × 40 = 8.4 × V₂
508 = 8.4 × V₂
Divide both side by 8.4
V₂ = 508 / 8.4
V₂ = 60.5 LTherefore, the final volume of the ammonia gas is 60.5 L
Learn more: https://brainly.com/question/14413057
The Element to the left is
Answer:
the element is fluorine
Explanation:
for the future, add up the little dots- which are electrons and the total of the dots is the atomic number, the little number on the periodic table.
If volatiles such as water vapor and carbon dioxide are added to a rock, what will happen to the melting temperature
Answer:
The melting temperature of a rock will decrease
Explanation:
In the case when the water vapour and the carbon dioxide is added to the rock so the rock melting temperature would be reduced as if we added the salt to an ice on a road so it reduced the temperature
Therefore according to the given situation, the last option is correct
And, the rest of the options are wrong
The molecule BrF3 has how many lone pairs of electrons on the central atom?
Answer:
2
Explanation:
2 lone pairs on the central atom of BrF3.
Why doesn't glue stick to the inside of the bottle? (Not sure if this is chemistry or not lol)
Answer:
When white glue is in the bottle, there's not enough air inside the bottle to cause the water to evaporate to make the glue sticky. Basically, the bottle holds the glue from the air and keeps the glue from going everywhere.
Once the chicken has reached 0ºC, you can add it to the sous-vide cooker (the Yeti cooler). What is the change in temperature (ºC) of the chicken during the sous-vide cooking process if the equilibrium temperature is 74ºC?
Do not include units with your answer.
Answer:
Change in temperature = 74
Explanation:
The initial Temperature of the chicken is given as 0° C. Then the question states that the chicken is added to sous-vide cooker. And the final equilibrium temperature after cooking is given as 74°C. The equilibrium temperature means that the temperature of each component in the system, such as cooker and chicken is same, which is 74°C. So, we have:
Initial Temperature = 0
Final temperature = 74
Therefore, the change in temperature during cooking will be:
Change in Temperature = Final Temperature - Initial temperature
Change in Temperature = 74 - 0
Change in temperature = 74
On the island of Hawaii, Keanu notices that the sand on the beach is black, the same color as the rock formations on the island. Keanu realizes the sand used to be part of the rock formations. How did material from the rock formations turn into sand?
a
Rays from the sun shone down on the rock, and it broke into pieces.
b
If anything were left out for a long time, it would break into small pieces.
c
The sand was formed by earthquakes, tsunamis, and other natural disasters. These disasters were strong enough to break the rock into small pieces.
d
Wind and rain interacted with the rock, breaking it into small pieces.
Answer: d
Explanation: Wind and rain interacted with the rock, breaking it into small pieces.
Keanu realizes the sand used to be part of the rock formations. Wind and rain interacted with the rock, breaking it into small pieces and turn into sand. Therefore, option D is correct.
What is rock formation?A rock formation refers to a specific arrangement or pattern of rocks in a particular area that has formed over a long period of time due to geological processes such as erosion, weathering, and tectonic activity.
Wind and rain interacted with the rock, breaking it into small pieces. Over time, the forces of weathering and erosion can break down rock formations into smaller and smaller particles, including sand.
Wind can carry these particles away from their original location and deposit them elsewhere, such as on a nearby beach. In the case of the black sand on the beach in Hawaii, it is likely that the sand was formed from the weathering and erosion of the volcanic rock that makes up much of the island.
Thus, option D is correct.
To learn more about the rock formation, follow the link:
https://brainly.com/question/26733433
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Make at least 3 observations that compare the Polonium nucleus before and after it decays?
Answer:
Observations
The Polonium nucleus disintegrates to form a stable Lead nucleus with the emission of an alpha particle.The mass number of the original Polonium nucleus decreases by 4 ( ie from 210 to 206)The atomic number of the original Polonium nucleus decreases by 2 (ie from 84 to 82)Explanation:
Polonium (Po) is a radioactive silver-grey material that exists in very low concentrations as a solid in the environment.
As a radioactive substance, it is unstable and then it undergoes radioactive alpha decay to form a stable chemical element - Lead (Pb)
Polonium Nucleus before decay
Polonium (²¹⁰₈₄Po) has a mass number of 210 and an atomic number of 84. The atomic number tells us that Polonium has 84 protons in its nucleus before it undergoes decay.
The mass number tell us that Polomium has 126 neutrons in addition to the 84 protons in its nucleus
The total number of protons and neutrons in a nucleus make up its Mass Number
Polonium Nucleus after decay
Polonium undergoes radioactive decay by emitting an alpha particle, which is also known as a Helium particle (⁴₂He)
²¹⁰ ₈₄Po ⇒ ²⁰⁶ ₈₂Pb + ⁴₂He
Observations
The Polonium nucleus disintegrates to form a stable Lead nucleus with the emission of an alpha particleThe mass number of the original Polonium nucleus reduces by 4 ( ie from 210 to 206)The atomic number of the original Polonium nucleus decreases by 2 (ie from 84 to 82)A new stable element (Lead) is formed.An alpha particle (⁴₂He) is released.Convert 3.52 × 10^22 atoms of gold to moles
Answer:
5.85 x 10⁻² mol Au
Explanation:
Divide the atoms of gold with Avogadro's number to find the solution.
Imagine you are a guest speaker for a kindergarten class and you have been asked to explain the chemical reaction occurring inside of a glow stick. What would you say
Answer:
Following are the solution to this question:
Explanation:
In this opinion, Tim Kane believed that its economy can not be badly affected by low manufacturing jobs in 1979, provided, in which an American industrial production had strong potential growth. Their view also opposes whatever Mr. Grove said of lower US employment particularly cos of increased production figures. Their opinion disputes as much as the American.
In Forbes, they wrote that All our industrial production is breaking records with increasing efficiency, despite a low number of industrial workers. Including Mr. grove, he favors beginning for small businesses. It was mainly due to the big advantage of smaller companies or the production of employment.
if 2.0 mol of Zn is mixed with 3.0 mol
of HCl, which reactant will be limiting?
The following Balanced Reaction will take place:
Zn + 2HCl → ZnCl₂ + H₂
In the question, we have 2 moles of Zinc and 3 moles of HCl for this reaction
Amount of HCl required to completely react with 2 moles of Zn:
Since we need 2 moles of HCl for every mole of Zn, we will need 2(2) = 4 moles of HCl for every 2 moles of Zn
Identifying the Limiting Reagent:
But we are only given 3 moles of HCl where we need 4 moles to completely react.
So, since HCl is in less amount, it is the Limiting Reagent
____ describes the quantity of solute that
can dissolve in a given amount of solvent at a
given temperature.
A. Viscosity
B. Solubility
C. Fluidity
D. Permeability
Answer:
B
Explanation:
as i increase the amount of solute without changing the amount of solvent i increase the solutions....?
Answer:
concentration?
Explanation:
solute = The dissolved substance in a solution.
solvent = The liquid in which the solute dissolves to form a solution.
Answer:
the only marked thing was in new game for the quiz that link yes to be in a relationship
Explanation:
you followed a 1 or a 1 year of high.
What will happen to the volume of a gas if the Kelvin temperature of the gas is reduced to 1/4 of the original temperature and the pressure of the gas is halved?
The volume of the gas will be 1/8 of the original volume.
The volume of the gas will remain the same.
The volume of the gas will be 1/6 of the original volume.
The volume of the gas will be half of the original volume.
Answer:
the volume of the gas will be 1/8 of the original value
Explanation:
a student is walking home from school. after 5 minutes it starts to rain lightly, so the student walks a little faster. after another 2 minutes it starts to rain hard, and the student runs the rest of the way home. the total time the student takes to get home in 10 minutes. which gragh below best represents the students motion during the trip home.
Answer:
A
Explanation:
complete question with the graphs are attached to this answer.
Let us consider the question closely. When the student was walking home, his/her speed was uniform. However, after 5 minutes, the student increased his/her pace due to the light rain. This is seen as a slight increase in speed after 5 minutes on the graph A. two minutes after (at the 7th minute) the rain comes hard and the student had to increase his/her speed by a much higher magnitude by running and maintaining this uniform speed all the way untill the end of the journey at the 10th minute.
What best defines a population
Answer:
A number of organisms in a specific area/place
Explanation: