The new volume of the balloon when heated to 48.0°C is approximately 1.95 L, which corresponds to option a
To calculate the new volume of the balloon, we can use the formula for the relationship between the initial and final volumes and temperatures of a gas, known as Charles's Law. The formula is:
V1/T1 = V2/T2
Where V1 is the initial volume (1.80 L), T1 is the initial temperature (24.0°C), V2 is the final volume (which we want to find), and T2 is the final temperature (48.0°C).
First, we need to convert the temperatures from Celsius to Kelvin by adding 273.15 to each temperature:
T1 = 24.0°C + 273.15 = 297.15 K
T2 = 48.0°C + 273.15 = 321.15 K
Now, we can plug these values into the formula and solve for V2:
(1.80 L) / (297.15 K) = V2 / (321.15 K)
To find V2, multiply both sides of the equation by 321.15 K:
V2 = (1.80 L) * (321.15 K) / (297.15 K)
V2 ≈ 1.95 L
So, the new volume of the balloon when heated to 48.0°C is approximately 1.95 L, which corresponds to option a.
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Polarities of analyte functional group increase in the order of hydrocarbon ethers < esters
The correct order of the increasing polarity of the analyte functional group isEthers < Esters.
The given statement is "Polarities of analyte functional group increase in the order of hydrocarbon ethers < esters." The order of polarities of functional groups is the order of their increasing polarity (i.e., less polar to more polar) based on their electron-donating or withdrawing ability from the rest of the molecule.Polarity of analyte: The analyte's polarity is directly proportional to the dipole moment of the functional group, which is associated with a difference in electronegativity between the atoms that make up the functional group.The electronegativity of an element is its ability to attract electrons towards itself. The greater the difference in electronegativity between two atoms, the more polar their bond, and hence the greater the polarity of the molecule.
To find the correct order of the increasing polarity of the analyte functional group, let's first compare the two groups: hydrocarbon ethers and esters. Here, esters have a carbonyl group while ethers have an oxygen atom with two alkyl or aryl groups. The carbonyl group has more electronegative oxygen, which pulls electrons away from the carbon atom, resulting in a polar molecule. On the other hand, ethers have a less polar oxygen atom with two alkyl or aryl groups, making them less polar than esters. Therefore, the correct order of the increasing polarity of the analyte functional group isEthers < Esters.
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The equilibrium constant Kc for the reaction
H2(g) + Br2(g) ⇆ 2HBr(g)
is 2.180 × 106 at 730°C. Starting with 5.20 moles of HBr in a 18.7−L reaction vessel, calculate the concentrations of H2, Br2, and HBr at equilibrium.
[H2] = ___M
[Br2]= ___ M
[HBr]= ___M
PLEASE I NEED ANSWER ASAP!
The equilibrium concentrations are approximately:
[H2] = 0 M
[Br2] = 0 M
[HBr] = 0.668 M.
What is equilibrium constant?At equilibrium, the equilibrium constant, K, indicates the connection between the reactants and products of a reaction. When the rates of forwarding and backward reactions are equal, a reaction has reached equilibrium.
The equilibrium constant expression for the reaction is:
Kc = [HBr]^2 / ([H2] * [Br2])
We are given that Kc = 2.180 × 10^6 at 730°C. We can use this information to set up an ICE (initial, change, equilibrium) table and solve for the equilibrium concentrations of the three species.
Initial concentrations:
[HBr] = 5.20 mol / 18.7 L = 0.278 M (since 2HBr are formed from 1 mol Br2 and 1 mol H2, initial [Br2] and [H2] are both 0)
Change in concentrations:
Let x be the change in concentration of HBr. Then, the change in concentration of H2 and Br2 will be -2x and -x, respectively.
Equilibrium concentrations:
[H2] = 0 - 2x
[Br2] = 0 - x
[HBr] = 0.278 + x
Substituting these concentrations into the equilibrium constant expression and solving for x gives:
Kc = [HBr]^2 / ([H2] * [Br2])
2.180 × 10^6 = (0.278 + x)^2 / (2x * x)
Solving for x using this equation gives:
x = 0.390 M
Therefore, the equilibrium concentrations are:
[H2] = 0 - 2x = -0.780 M (Note: negative concentration is unphysical, but indicates that all H2 reacted)
[Br2] = 0 - x = -0.390 M (Note: negative concentration is unphysical, but indicates that all Br2 reacted)
[HBr] = 0.278 + x = 0.668 M
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What is the movement of water up a narrow tube due to attractions with the surface of the tube called? capillary action meniscus polarity surface tension.
The attraction mediated flow of water in the narrow tube has been termed as Capillary action. Thus, option A is correct.
The process of flowing up of liquid with the attraction force between the molecules and the surface has been achieved with the surface characteristics.
Movement of water in a narrow tubeThe surface has the force of attraction with the flowing liquids in the sample. It results in the increased surface interaction, and the liquid flows up in the tube against gravity.
The movement of the liquid in the water through a narrow tube has been termed as capillary action. Thus, option A is correct.
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Answer:
capillary action
Explanation:
A 1500 N force gives an object an acceleration of 3 m/s2.
What is the mass of the object?
Answer:
500kg.
Explanation:
Newton's Second Law relates force, mass and acceleration to one another through the equation:
F = ma
We can rearrange this equation algebraically to solve for mass:
m = F/a
Substituting our known values for the variables, we get:
m = 1500N/3m/s2
So mass of the object is 500kg.
We know it's kg because Newtons (N) are a unit defined as 1 kg/m/s2, so m/s2 cancels out when we divide :)
How does phosphorylation of glucose trap it in the cell?
It's no longer a substrate for the glucose transporter.
[ Choose ] FALSE TRUE
The phosphate group makes the molecule bigger.
[ Choose ] FALSE TRUE
The phosphate group gives glucose a +2 charge.
[ Choose ] FALSE TRUE
Changes in size and charge make it easier for phosphorylated glucose to diffuse across the membrane.
[ Choose ] FALSE TRUE
The answers to the statements on the trapping of glucose after phosphorylation in the cell are: TRUE, TRUE, FALSE, FALSE
1. It's no longer a substrate for the glucose transporter.
- This statement is TRUE. The phosphorylated glucose is no longer recognized by the glucose transporter, preventing it from leaving the cell.
2. The phosphate group makes the molecule bigger.
- This statement is TRUE. The addition of the phosphate group increases the size of the glucose molecule.
3. The phosphate group gives glucose a +2 charge.
- This statement is FALSE. The phosphate group imparts a negative charge on the glucose molecule, not a positive charge.
4. Changes in size and charge make it easier for phosphorylated glucose to diffuse across the membrane.
- This statement is FALSE. The changes in size and charge make it more difficult for glucose after phosphorylation to diffuse across the membrane, trapping it within the cell.
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how much heat is needed to convert 906 of ice at to steam at ? be sure your answer has the correct number of significant digits.
Amount of heat energy that is required to heat 906 g of ice to steam is 530952 Joules.
Explanation:
Given:
Amount of transferred energy = Q =?
Mass of ice (water) = m = 906 g
Initial temperature of ice = T(i) = -22° C
Final temperature of steam = T(f) = 118°C
Formula for Heat capacity is given by
Q = m×c×Δt ........................................(1)
where:
Q = Heat capacity of the substance (in J)
m=mass of the substance being heated in grams(g)
c = the specific heat of the substance in J/(g.°C)
Δt = Change in temperature (in °C)
Δt = (Final temperature - Initial temperature) = T(f) - T(i)
= 118 - (-22) = 140°C
Specific heat of water is c = 4.186 J /g. °C
Substituting these in equation (1), we get
Q = m×c×Δt
= 906 × 4.186 × 140
= 530952.24 J
The heat energy required is equal to 530952.24 Joules ≅ 530952 Joules.
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A 10.0 ml portion of 0.010 m hcl is diluted by adding it to100.0 ml of water. what is the ph of the solution
From the calculation, the pH of the solution after dilution is 3.
What is the pH?The pH is the hydrogen ion concentration of the solution. Now we know that;
C1 = 0.010 m
V1 = 10.0 ml
V2 = 10.0 ml + 100.0 ml = 110 ml
C2 = ?
C1V1 = C2V2
C2 = C1V1 /V2
C2 = 0.010 m * 10.0 ml / 110 ml
C2 = 0.00091 M
pH = -log[0.00091 M]
pH = 3
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Which statement best describes what happens to the carbon dioxide produced by humans?.
A flash contains 85.6g of C7H5NO3S (Saccharine) in 2.00 litre of a solution. What is the molarity?
Answer:
0.234 M
Explanation:
C- 12.009 x 7
H- 1.001 x 5
N- 14.006
O- 16 x 3
S- 32.059
___________+
183.133 g/mol
\(\frac{1mol}{183.133g} *\frac{85.6g}{2.00L}\) = 0.234 M Cancel out the grams mol/L equals molarity. Lowest significant figure is 3
Acids generally release h2 gas when they react with
Answer:
Metals
Explanation:
When acids react with metals h2 gas is produced and a salt is formed
eg. Na + HCL ---------- NaCl + H2
Answer:
active metals
Explanation:
true or false: A person standing still with two heavy bundles is doing a lot of work
in which pair do both compounds exhibit predominantly ionic bonding? group of answer choices naf and mgo so2 and hcl rbf and no2 kno3 and ch4 kcl and co2
The pair of compounds that exhibit predominantly ionic bonding are NaF and MgO.
NaF is composed of a metal (Na) and a non-metal (F), and MgO is composed of a metal (Mg) and a non-metal (O). In both compounds, the metal atom loses electrons to form a cation, and the non-metal atom gains electrons to form an anion. The resulting ions attract each other electrostatically to form the ionic bond.
In the other pairs of compounds listed, the bonds are not purely ionic. SO2 and HCl have covalent bonds, RbF and NO2 have polar covalent bonds, KNO3 has both ionic and covalent bonds, and KCl and CO2 have polar covalent bonds.
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equation of bhr and h2o
calculate the volume of water added to 0.510 l of 0.0440 m sodium hydroxide to obtain a 0.0260 m solution (assume the volumes are additive at these low concentrations).
To calculate the volume of water added to the 0.510 L of 0.0440 M sodium hydroxide to obtain a 0.0260 M solution, follow these steps:
1. Determine the initial moles of sodium hydroxide in the solution:
Moles = Molarity x Volume
Moles = 0.0440 mol/L x 0.510 L = 0.02244 mol
2. Determine the final volume needed to obtain a 0.0260 M solution:
Volume = Moles / Molarity
Volume = 0.02244 mol / 0.0260 mol/L = 0.863 L
3. Since volumes are additive at these low concentrations, calculate the volume of water added:
Volume of water added = Final volume - Initial volume
Volume of water added = 0.863 L - 0.510 L = 0.353 L
Therefore, you need to add 0.353 L of water to the 0.510 L of 0.0440 M sodium hydroxide to obtain a 0.0260 M solution.
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The half-life of Radon-222 is 3.8 days. If a 10 gram sample is present, how many days will it take to have less than one gram remaining?
(alt + F4) might be the answer you are looking
Explanation:
I'm not exactly sure how I came up with this answer but it is for sure the answer
Q.does salt make water boil at a higher temperature?
Answer:
Yes
Explanation:
The salt increases the boiling point, meaning it make water boil at a higher temperature, and it decreases the specific heat capacity, meaning it will heat up quick.
What is the formula unit for a compound made from Pb4+ and oxygen? (3 points)
PbO2
O2Pb
Pb4O2
O4Pb2
The formula unit of compound made up from Pb4+ and oxygen is PbO2.
The formula unit for a compound made from Pb⁴⁺ and oxygen is PbO₂. Therefore, option (1) is correct.
What is the formula unit?A formula unit represents the lowest whole number ratio of ions in an ionic compound. The formula mass of a substance is the sum of the atomic masses of the ions present in the formula unit of an ionic compound.
Formula unit is the empirical formula of any covalent or ionic solid compound which is used as an independent entity for stoichiometric calculations. Formula mass is also defined as the sum of atomic masses of constituent atoms in an ionic compound.
A molecule is made up of two or more elements that are covalently bonded. Also, the molecular mass gives the mass of a molecule relative to that of a carbon twelve atom which has a mass of twelve units.
As we know the valency of lead is 4 and the valency of oxygen is 2. To satisfy the valency of each other two oxygen combine with one lead (IV). Therefore, the formula unit of the compound is PbO₂.
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estimate how many molecules of air are in each 2.2- l breath you inhale that were also in the last breath galileo took.
Each 2.2-l breath contains approximately 5.90 × 10²² molecules of air. However, it is important to note that this is a rough estimate, and the actual number may vary depending on factors such as altitude, humidity, and temperature.
It is impossible to estimate the number of molecules of air in each 2.2-l breath you inhale that were also in the last breath Galileo took. This is because the atmosphere is constantly in motion, and the concentration of molecules changes over time. Therefore, the air you are breathing now is not the same air that Galileo breathed. However, we can make a rough estimate of the number of molecules in each breath.Let's assume that the air you inhale is composed of 78% nitrogen, 21% oxygen, and 1% other gases, including carbon dioxide, argon, neon, helium, and methane. We also know that air at standard temperature and pressure (STP) has a volume of 22.4 liters per mole. We can use this information to estimate the number of molecules of air in each 2.2-l breath as follows:1. Calculate the number of moles of air in each 2.2-l breath by dividing the volume by the volume per mole at STP: 2.2 L ÷ 22.4 L/mol = 0.0982 mol2. Calculate the number of molecules of air in each mole by multiplying by Avogadro's number: 0.0982 mol × 6.022 × 10²³ molecules/mol = 5.90 × 10²² molecules
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The pressure of a gas in a cylinder when it is heated to a temperature of 250k is 1.5 atm. What was the initial temperature of the gas if it’s initial pressure was 1 atm?
Answer:
\(T1=166.66K\)
Explanation:
According to Gay-Lussac’s law simply states that the ratio of the initial pressure and temperature is equal to the ratio of the final pressure and temperature for a gas of a fixed provided that the mass is kept at a constant volume.
Given:
Initial pressure, P1 = 1 atm
Final pressure, P2 = 1.5 atm
Final temperature, T2 = 250 K
The law can be applied using the below formula
P1T2 = P2T1
Then,
T1 = (P1T2)/P1 = (1*250)/(1.5) = 166.66 Kelvin.
\(T1=166.66K\)
:
Answer:
\(T_1=166.7K\)
Explanation:
Hello,
In this case, by applying the Gay-Lussac's law which help us to understand the pressure-temperature gas behavior via a directly proportional relationship:
\(\frac{P_1}{T_1} =\frac{P_2}{T_2}\)
In such a way, as we are asked to compute the initial temperature knowing the initial pressure and final both temperature and pressure, so we solve for it:
\(T_1=\frac{T_2P_1}{P_2}=\frac{250K*1atm}{1.5atm} \\\\T_1=166.7K\)
Best regards.
Name the property of salt investigated in the above experiment
which experiment please involve a clip
an antagonist is a compound that enhances the action of a drug.
- True
- False
The given statement, "an antagonist is a compound that enhances the action of a drug" is false.
An antagonist is a type of compound that specifically acts on receptors in the body to block or inhibit the effects of a drug or endogenous ligand (a naturally occurring substance in the body). It does not enhance or amplify the action of a drug.
In the context of receptor binding, drugs and ligands can have either agonistic or antagonistic effects. Agonists are compounds that bind to receptors and activate them, triggering a biological response. On the other hand, antagonists bind to receptors but do not activate them. Instead, they prevent the binding of agonists or inhibit their activity, thereby blocking the normal physiological response.
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How many atoms are present in 2.30 moles of Carbon?
3.82 x 10-24 atoms -a
3.82 x 1023 atoms-b
1.38 x 1024 atoms-c
6.02 x 1023 atoms-d
( WILL MARK THE BEST !! )
What are some examples of both simple tools and complex tools? How are these technological tools useful to
scientists?
Answer:
Simple tool: Ramp
Complex: Drill
Explanation:
There you are
What important points do you need to remember about combustion?
Explanation:
A substance burning in the presence of oxygen and leads to the formation of heat and light is called combustion.
Some important points about combustion are as follows:
Fuel should be present for burning.Air should be present for the supply of oxygen.There should be heat (or ignition temperature) to initiate the chemical reaction.plum-pudding model other name
Answer:
Thomson model of the atom
Explanation:
"plum pudding" from
raisins used to be called plums
distribution of electrons reminded many scientists of raisins
within Thomson's model's positively charged region of space
wikipedia
nuclearpowercom
The plant on the left is growing more because it has been receiving more water
Answer:
uhhh well ig btw what plant
Explanation:
it would be more sunlight to
4. What trend in atomic radius occurs down a group on the periodic table?
rind on the periodic table?
Answer:Atomic radius gets bigger
Explanation:
Atomic radius bigger because not only do the atoms have more and more protons and neutrons, and thus more mass in general, there is also stronger shielding affect. Shielding affect is when electrons closer to the nucleus block the positive charge from reaching electrons farther from the nucleus, and thus those far electrons are not drawn towards the nucleus as strongly, and spread out more, increasing atomic radius.
state the volume of sodium hydroxide
Answer:
0.0250 dm 3.
Explanation:
Volume of sodium hydroxide solution = 25.00 ÷ 1000 = 0.0250 dm 3. Amount of sodium hydroxide = 0.100 × 0.0250 = 0.00250 mol. From the equation, 0.00250 mol of NaOH reacts with 0.00250 mol of HCl
Select the correct answer.
Which of the following is a physical model of the Sun?
A.
an equation that describes the Sun's motion
В.
a chart that lists the temperatures of different parts of the Sun
C.
a computer program that shows how the Sun changes over time
D
a paragraph that describes the Sun's structure
E.
a small yellow ball that represents the Sun
Answer: E
Explanation: The ball is yellow so it can easily represent the sun
How many molecules are in 35.5 grams of carbon dioxide?
Answer:
you have to use the avogadro's constant of 6.023×10^23 to calculate the number of molecules of carbon dioxide.and you also have to use the molecular mass which is 44.
35.5/44×6.023×10^23
=4.85×10^23
I hope this helps and sorry if it's wrong