Answer:
See Explanation
Explanation:
When the balloon is placed above the beaker as described and heating commences, the balloon inflates more. This increased inflation is due to the expansion of the gas in the balloon.
The gas expands because the molecules of gas inside the balloon receive a greater kinetic energy when the temperature was increased hence they move faster and spread out. Recall that temperature is defined as a measure of the average kinetic energy of the molecules in a body.
As the gas in the balloon is heated up, its density decreases. The more the beaker is heated the more the balloon becomes inflated.
When the balloon is removed from the beaker and placed in an ice bath, the balloon shrinks as temperature decreases. This is in conformity with Charles's law.
How many grams of carbon are in 6.32 moles?
Answer:
17.18 moles of NaCl are in 2,719 mL of a 6.32
Explanation:
1. How many grams of water are in a cup containing
0.1 moles of H2O?
Answer:
Explanation:
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How many electrons are in the highest occupied energy level of a neutral chlorine atom?
I need guidance on this question
Answer:
(C) NO2 has covalent bonds.
Is it dangerous to remove gunpowder from firecracker
What determines the brightness of a light wave?
Answer: The brightness of light is related to intensity or the amount of light an object emits or reflects. Brightness depends on light wave amplitude, the height of light waves. Brightness is also somewhat influenced by wavelength.
Explanation:
PLEASE HELP! (8.01 MC)
What is capillary action? Describe how capillary action shown by water is useful for
plants and animals on Earth. (8 points)
Capillary action help the root of plant to absorb water from the soil and help animals to bring water.
What is capillary action?Capillary action is the process by which water flow and passed through a narrow space without the help of an opposition or any form of external forces like gravity.
Therefore, Capillary action help the root of plant to absorb water from the soil and help animals to bring water.
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What is the molarity of a 750.0 milliliter solution containing 2.5 moles of solute?
ОА.
1.9 M
OB
0.0033 M
O c.
1,875 M
OD.
0.30 M
OE.
3.3 M
Molarity : It is defined as the number of moles of solute present in one liter of solution.
Therefore, the molarity of solution is 3.33
A. 1.9 M
B. 0.0033 M
C. 1,875 M
D. 0.30 M
E. 3.3 M
Which element is not found in the skeleton of amino acids?
Answer:
Serine. Serine is non-essential amino acid supplied from food or synthesized by the body from a number of metabolites, including glycine. Serine is found in soybeans, nuts (especially peanuts, almonds, and walnuts), eggs, chickpeas, lentils, meat, and fish (especially shellfish).
Explanation:
What do calories provude for the human body?
Answer:
energy for the body to work
Explanation:
For a reaction that has reactant A in its rate law, select which factor(s) affect the reaction rate of reactant A. Choose one or more: A. temperature B. change in concentration of a reactant C. catalyst D. change in concentration of a product E. physical state of the reactants
Answer:
Option B
Explanation:
The rate law is represented as
Rate of the reaction = [tex]k [A^x][B^y][/tex]
Here K is the rate constant
A is the concentration of substance A
B is the concentration of substance B
Hence, If reactant A is in the rate law equation, then if its concentration varies then it will impact the rate of the reaction
Hence, option B is correct
Which of the following would result in being able to dissolve a greater amount of gas in a solution?
Answer:
Lower the temperature of the solution
Guided Notes: Types of Chemical Reactions:
1. Synthesis or Combination
A + B à AB
Example:
Magnesium + Oxygen gas à Magnesium Oxide
_________ + _______ à __________
2. Decomposition
AB à A + B
Example:
Calcium Oxide à Calcium + Oxygen
_______ à __________ + __________
3. Single Replacement
A + BX à AX + B
Example:
_________ + _______ à __________ + __________
4. Double Replacement
AX + BY à AY + BX
Example:
_________ + _______ à __________ + _________
5. Combustion
CxHyOz + O2 à CO2 + H2O
Example:
Propane + Oxygen à Carbon dioxide + water
_________ + _______ à __________ + _________
Classify the following chemical reactions:
Sodium and Chlorine gas à Sodium Chloride
_________ + _______ à __________ Type of Reaction: __________________
CaCO3 + HCl à CaCl2 + H2CO3 Type of Reaction: __________________
Al + ZnCl2 à AlCl3 + Zn Type of Reaction: __________________
Fe + O2 à Fe2O3 Type of Reaction: __________________
H2CO3 à CO2 + H2O Type of Reaction: __________________
Octane (C8H10) is burned in oxygen gas to produce
carbon dioxide and gaseous water
______ + _______ à _______ + ________ Type of Reaction: _________________
Answer:
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Will give brainly
In two or more complete sentences explain how to balance the chemical equation,
CH4 + O2 CO2 + H2O and include all steps.
Answer:
CH4 + 2O2 → CO2 + 2H2O
Explanation:
1. Add 2 before H20 to get equal amount of hydrogen on both sides of equation.
2. Add 2 before 02 to get equal amount of oxygen on both sides of equation.
The sequence was already outlined, so she didn't have to make any difficult choices
to solve an equation
D) between math and poetry
to finish a task on time
D about which class to take
The sequences were already outlined therefore she didn't have any difficulty in choosing between math and poetry.
What is a sequence?A sequence is an orderly arrangement of events or objects. When objects or events are arranged in a sequence, decision making becomes much easier.
For the task at hand, since the sequences were already outlined, then she didn't have any difficulty in choosing between math and poetry.
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Answer:
to solve an equation
Solid mercury(II) oxide decomposes into liquid mercury and oxygen gas upon the absorption of 90.8 kJ for each mole of mercury(II) oxide decomposed.
The question is incomplete, the complete question is;
Solid mercury (II) oxide decomposes into liquid mercury and oxygen gas upon the absorption of 90.8 kJ for each mole of mercury (II) oxide decomposed.
What is the reaction without the energy?
What is the appropriate side of the equation and value for the energy term?
Answer:
See Explanation
Explanation:
The equation of the reaction is;
2HgO(s) ==> 2Hg(l) + O2(g)
Let us recall that a chemical equation is balanced if the number of atoms of each element on both sides of the reaction equation are the same. There are two atoms each of mercury and oxygen on both sides of the reaction equation hence the equation is balanced.
In order to write a thermochemical equation, the heat of reaction is written on the right hand side of the reaction equation after writing the products as follows;
2HgO(s) ==> 2Hg(l) + O2(g) ΔH = +90.8 kJ
Question If 1.2 g of a gas at 3.5 atm of pressure dissolves in
1.0 L of water at 25°C, how much pressure is needed to
dissolve 2.4 g of the gas in 1.0 L of water at the same
temperature?
Answer:
7.1 atm
Explanation:
Step 1: Calculate Henry's constant
At P = 3.5 atm, we can dissolve 1.2 g of a gas in 1.0 L of water, that is, the concentration is C = 1.2 g/1.0 L = 1.2 g/L. We can calculate Henry's constant, which relates the concentration and the pressure of a gas dissolving in a liquid, using Henry's law.
C = k × P
k = C/P = (1.2 g/L)/3.5 atm = 0.34 g/L.atm
Step 2: Calculate the pressure needed to dissolve 2.4 g of the gas in 1.0 L of water
We want to dissolve 2.4 g of the gas in 1.0 L of water, that is, C = 2.4 g/1.0 L = 2.4 g/L. We can calculate the pressure required using Henry's law.
C = k × P
P = C/k = (2.4 g/L)/(0.34 g/L.atm) = 7.1 atm
How many molecules are present in 4.5
moles of H2O?
Answer:
Mole of the H2O = 4.5
Number of molecules =4.5 multipled by avogadro's number.
What frequency corresponds to an absorption line at 460 nm?
A. 1.53 x 1014 Hz
B. 6.88 x 1014 Hz
C. 6.52 x 1014 Hz
D. 4.32 x 1014 Hz
Answer:
C. 6.52 x 10^14 Hz
Explanation:
hope this helps
A balloon has a volume of 7.00 liters at a pressure of 740 mm Hg. If the temperature remains constant, at what pressure will the volume decrease to 2.00 liters?
a. 749 mm Hg
b. 52.9 mm Hg
c. 211 mm Hg
d. 2590 mm Hg
Answer:
D
Explanation:
P1 x V1 = P2 x V2
7.00(740) = x(2.00)
2590 mm Hg
took me a while because i dont know this, hope its right good luck
why are all the differnent parts of the cell necesary
The average kinetic energy of a sample of water molecules is –
a. always equal to zero
b. increased as the temperature is decreased
c. increased as the temperature is increased
d. unaffected by temperature changes
Answer:
c. increased as the temperature is increased
Explanation:
The average kinetic energy of a sample of water molecules is increased as the temperature is increased. Hence, option C is correct.
What is average kinetic energy?The average kinetic energy of the particles in a gas is proportional to the
temperature of the gas. Because the mass of these particles is constant,
the particles must move faster as the gas becomes warmer.
The average kinetic energy of gas molecules is directly proportional to
absolute temperature only; this implies that all molecular motion ceases
if the temperature is reduced to absolute zero.
Hence, option C is correct.
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Two beakers each contain 200 mL of water. Into one beaker, a student adds 5.0 g NaI. Into the other, she adds 5.0 g KI.
What is the expected effect on the boiling points of the solutions?
Answer:
Explanation:
A) the NaI solution will have a higher boiling point than the KI solution
A compound is 70.0% iron and 30.0% oxygen. Its molecular mass is 479.1 g/mol. Determine the
molecular formula.
Answer:
[tex]Fe_6O_9[/tex]
Explanation:
Hello there!
In this case, since these problems about formulas, firstly require the determination of the empirical formula, assuming that the given percentages are masses, we can calculate the moles and mole ratio of oxygen to iron as shown below:
[tex]n_{Fe}=70/55.85=1.25\\\\n_O=30/16=1.875[/tex]
In such a way, by rounding to the first whole number we multiply by 8 and divide by 5 to obtain:
[tex]Fe_{2}O_{3}[/tex]
Whose molar mass is 159.69 g/mol and the mole ratio of the molecular to the empirical formula is:
479.1/159.69=3
Therefore, the molecular formulais:
[tex]Fe_6O_9[/tex]
Regards!
FAST PLSSS!!
It appears as though the sun disappears and the moon comes out at nighttime. Based on what you know, explain why this is happening at nighttime.
a
Earth is rotating towards the sun.
b
Earth is rotating away from the sun.
c
The moon is rotating toward the sun.
d
The moon is rotating away from the sun.
What is the molar mass of Ca(NO3)2?
Answer:
The molar mass is 40.1+2×(14+3(16))=40.1+2×(62)=164.1g/mol.
Which answer best describes this reaction?
H H
O
HH
H H
HH
H-C-C-C
1 |
H H
H-C-C-C
0-C-C-H
+ H-O-C-C-H -
1
O-H
H H
HH
Η Η
H20
O formation of an ester by condensation
O formation of an ether by condensation
O formation of a new product using a substitution reaction
O formation of a new product using an addition reaction
Answer: option c
Explanation:
Trust
The answer which best describes this chemical equation is formation of a new product using a substitution reaction.
Chemical equation is a symbolic representation of a chemical reaction which is written in the form of symbols and chemical formulas.The reactants are present on the left hand side while the products are present on the right hand side.
A plus sign is present between reactants and products if they are more than one in any case and an arrow is present pointing towards the product side which indicates the direction of the reaction .There are coefficients present next to the chemical symbols and formulas .
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How can parents and other caregivers help children learn good nutrition in the home?
Answer:
Healthy Eating — Make sure your child's caregivers offer healthy snacks and meals. Consider other influences. Just as they do for you, your children's friends and the media can also affect healthy choices. Some TV, online, and other ads try to persuade children to consume high-fat foods and sugary drinks.
Four steps of lipolysis
Answer:
lipolysis is the metabolic pathway through which liquid triglycerides are hydrolyzed into a glycerol and three fatty acids. it's used to mobilize stored energy during fasting or exercise, and usually occurs in fat adipocytes.
Determine the hydroxide ion concentration in
a solution that is 0.00034 M Ca(OH)2.
Answer in units of M.
Answer:
[tex]0.00068M[/tex]
Explanation:
Hello there!
In this case, according to the ionization of calcium hydroxide, a strong base:
[tex]Ca(OH)_2\rightarrow Ca^{2+}+2OH^-[/tex]
Thus, since there is a 1:2 mole ratio of calcium hydroxide to hydroxide ions, we apply the following proportional factor to obtain:
[tex]0.00034\frac{molCa(OH)_2}{L}*\frac{2molOH^-}{1molCa(OH)_2} \\\\=0.00068\frac{OH^-}{L}\\\\=0.00068M[/tex]
Regards!
