Answer:
[tex]V_2=52.2L[/tex]
Explanation:
Hello there!
In this case, by bearing to to mind the given conditions, it is firstly possible to determine the initial volume of the closed system via the ideal gas equation:
[tex]PV=nRT\\\\V=\frac{2.00mol*0.08206\frac{atm*L}{mol*K}*298.15K}{1.00 atm} \\\\V=48.9L[/tex]
Which is V1 in the Charles' law:
[tex]\frac{T_2}{V_2} =\frac{T_1}{V_1}[/tex]
And of course, T1 is 298.15 (25+273.15). Therefore, by solving for V2 as the final volume, we obtain:
[tex]V_2=\frac{V_1T_2}{T_1}\\\\V_2=\frac{48.9L*(45+273.15)K}{(25+273.15)K} \\\\V_2=52.2L[/tex]
Best regards!
1. Which of these is not a macromolecule? a) Alab) protein c) polysaccharide d) nucleic
acid
Answer:
a) alab
Explanation:
Two of the main macromolecules are proteins and nucleic acid, and a polysaccharide is multiple monomers (monosaccharide) that join to create another macromolecule called carbohydrates.
Consider this statement: Earth is the only source of gravity in the solar system. Do you agree? Give
your reasons.
Answer:
Explanation:
You're kidding, right?
Earth is a puny little planet stuck in the Milky Way which is not a particularly large galaxy that has millions of stars with many times more our gravitational influence.
We are very lucky that the gravitational force is so weak. Were it not, We would be pulled in every direction imaginable and swallowed many times by larger and larger black holes until our existence could never be traced.
We would be like 1 electron in all the atoms of the Universe combined. There's no end to the size and scope of the forces involved if the gravitational force were even a small bit larger than what it is now.
A piece of Li is
dropped into water
and catches fire
producing LiOH
is a Chemical or physical change
What is the molarity of a solution containing 20moles of NaCl dissolved in 10 liters of water?
10 mol/L
2 mol/L
5mol/L
0.5 mol/L
The molarity of a solution containing 20moles of NaCl dissolved in 10 liters of water is 2 mol/L.
How do we calculate molarity?Molarity of any solution will be calculated by using the below formula:
M = n/V, where
n = moles of solute = 20 mol
V = volume of solution or solvent = 10 L
On putting values on above equation, we get
M = 20 / 10 = 2M
Hence required molarity of NaCl is 2 M.
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What volume of 0.215 M HCl is required to neutralize 50.0 mL of
0.800 M NaOH?
Answer:
186 mL HCl
Explanation:
M1V1 = M2V2
M1 = 0.215 M HCl
V1 = ?
M2 = 0.800 M NaOH
V2 = 50.0 mL
Solve for V1 --> V1 = M2V2/M1
V1 = (0.800 M)(50.0 mL) / (0.215 M) = 186 mL HCl
What are primary observations in science?
Answer:
Observation is the active acquisition of information from a primary source. In living beings, observation employs the senses. In science, observation can also involve the recording of data via the use of scientific instruments. The term may also refer to any data collected during the scientific activity.
Explanation:
(b) the absolute temperature of the gas at which 3.33x103 mol occupies 478 mL at 750 torr,
Explanation:
T=?
Given
n=3.33×10³
V=478mL=4.78L
P=750torr= 0.987 Atm
simply use the formula
PV =nRT
where R is universal gas constant
0.987×4.78= 3.33×10³×8.314×T
T = 0.000170°c
T= 273.15 K!
The absolute temperature of the gas at which 3.33x10³ mol occupies 478 mL at 750 torr is 1.726 × 10-³K
HOW TO CALCULATE TEMPERATURE:
The temperature of a substance can be calculated using the ideal gas law equation as follows:PV = nRT
Where;
P = pressure (atm)V = volume (L)n = number of moles (mol) R = gas law constant (0.0821 molK/Latm)T = temperature (K)According to this question,
P = 750torr = 0.987 atmV = 478mL = 0.478L0.987 × 0.478 = 3.33 × 10³ × 0.0821 × T0.472 = 273.39TT = 0.472 ÷ 273.39T = 1.726 × 10-³KTherefore, the absolute temperature of the gas at which 3.33x10³ mol occupies 478 mL at 750 torr is 1.726 × 10-³KLearn more at: https://brainly.com/question/12124605?referrer=searchResults
Please give me the answer please
Answer:
A. 30cm³
Explanation:
Based on the chemical reaction:
CaCO₃ + 2HCl → CaCl₂ + H₂O + CO₂
1 mol of calcium carbonate reacts with 2 moles of HCl to produce 1 mol of CO₂
To solve this question we must convert the mass of each reactant to moles. With the moles we can find limiting reactant and the moles of CO₂ produced. Using PV = nRT we can find the volume of the gas:
Moles CaCO₃ -Molar mass: 100.09g/mol-
1.00g * (1mol / 100.09g) = 9.991x10⁻³ moles
Moles HCl:
50cm³ = 0.0500dm³ * (0.05 mol / dm³) = 2.5x10⁻³ moles
For a complete reaction of 2.5x10⁻³ moles HCl there are necessaries:
2.5x10⁻³ moles HCl * (1mol CaCO₃ / 2mol HCl) = 1.25x10⁻³ moles CaCO₃. As there are 9.991x10⁻³ moles, HCl is limiting reactant.
The moles produced of CO₂ are:
2.5x10⁻³ moles HCl * (1mol CO₂ / 2mol HCl) = 1.25x10⁻³ moles CO₂
Using PV = nRT
Where P is pressure = 1atm assuming STP
V volume in L
n moles = 1.25x10⁻³ moles CO₂
R gas constant = 0.082atmL/molK
T = 273.15K at STP
V = nRT / P
1.25x10⁻³ moles * 0.082atmL/molK*273.15K / 1atm = V
0.028L = V
28cm³ = V
As 28cm³ ≈ 30cm³
Right option is:
A. 30cm³Did you hear the one about a chemist who was reading a book about helium?
Answer: I had that before it's a riddle. Here lemme find it and give you the answer.
Explanation:
1.H
2.E
3.C
4.O
5.U
6.L
7.D
8.U
9.T
10.P
11. N
12.T
13.I
14.T
15.D
16.O
17.N
18.W
Helium is a type of chemical element which is a noble gas that does not have odor, color, taste and does not contain toxicity. It's atomic number is 2 and is chemically represented with "He"
As a result of this, there are some unique characteristics of the Helium element which includes:
Low boiling pointLow densityHigh thermal conductivityLow solubility, etcPlease note that your question is disjointed so I gave you a general overview to help you understand the concept
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What does evaporation produce?
a precipitation
b rain or snow
C water vapor
d condensation
Answer:
C water vapor.
or saturated water vapor ( steam )
1. This is very important in preventing the spread of pathogens in the kitchen.
Can somebody please help me!!!!
Answer and Explanation:
The answer is Motion.
We can see that part of the image is blurry, which shows that the fish are moving fast. Moving = motion, so that means the fish has motion.
#teamtrees #PAW (Plant And Water)
Answer:
motion
Explanation:
22.4 L is the volume of any gas regardless of atmospheric conditions.
O True
O False
A transverse wave is observed to be moving along a lengthy rope. Adjacent crests are positioned 2.4 m apart. Exactly six crests are observed to move past a given point along the medium in 9.1 seconds. Determine the frequency of these waves
Answer:
f = 0.65 hz
Explanation:
Given that,
The distance between adjacent crests, wavelength = 2.4 m
6 crests are observed to move past a given point along the medium in 9.1 seconds.
We need to find the frequency of these waves.
We know that,
Frequency = no. of waves per second.
[tex]f=\dfrac{6}{9.1}\ Hz\\\\=0.65\ Hz[/tex]
So, the frequency of these waves is equal to 0.65 Hz.
Use the word bank below to answer the questions that follow:
chemical
mixture
heat capacity
homogeneous viscosity sublimation
physical property compound chemical formula
substance density
mass
temperature
pressure
heterogeneous
The ratio of the mass of a substance to its volume is called
Answer:
The ratio of the mass of a substance to its volume is called...density.
Can somebody please help me!!!
Answer:
javier applied force how this helps
How many grams of magnesium
sulfate (MgSO4) are dissolved in
0.965 L of a 0.0575 M solution?
Molar Mass Mg: 24.30 g/mol
Molar Mass S: 32.06 g/mol
Molar Mass O: 16.00 g/mol
Answer:6.68
Explanation:
How many grams of hydrogen gas are needed to completely react with excess nitrogen to produce 26.7 grams of ammonia (NH3)? N2 + H2 → NH3
Answer:
4.74 g H2
Explanation:
First, balance your reaction:
N2 + 3H2 --> 2NH3
Now convert 26.7 g NH3 to moles NH3 by dividing by its molar mass (17.031 g/mol). Then multiply by the mole ratio of 3 mol H2 for every 2 mol NH3 to get moles of H2. Finally multiply by the molar mass of H2 (2.016 g/mol) to get grams of H2.
26.7 g NH3 • (1 mol NH3 / 17.031 g NH3) • (3 mol H2 / 2 mol NH3) • (2.016 g H2 / 1 mol H2) = 4.74 g H2
True or False: Having more moles of solute definitely means a higher concentration (molarity) solution
Answer:
True
Explanation:
The statement having more moles of solute definitely means a higher concentration (molarity) solution is true.
What is Molarity?Molarity is used to define concentration of any solution and it will be define as the no. of moles of solute present in per liter of solution and it is represented as:
M = n/V
From the equation it is clear that molarity of is directly proportional to the moles of the solute present in that. So, more no. of moles shows more concentration of solution.
Hence, given statement is true.
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Ochem question?
which of the following would be the best nucleophile in a Methanol?
1. F-
2. NH3
3. CH3S-
4. CH3O-
Answer: 4.) CH3O is the answer, which stands for Methoxide.
Explanation:
100 POINTS!!!!!!!
The following diagram shows the branching tree for four kingdoms and some of their shared derived characteristics.
A slanting line is shown. There are four lines drawn vertically on this line at equal intervals. There is a black circle between each pair of these vertical lines. Protists, Plants, Fungi, Animals are written on top of each vertical line in order from left to right. Common Cell is written on the left most end of the sloping line. The second black circle has Mostly Multicellular written on it. The first black circle has X written on it.
What shared characteristic can be written at point X? Use complete sentences to explain your answer.
Answer:
The answer could be "Autotrophs that photosynthesis".
Explanation:
At point X, the common characteristic can be written. The common character between protists and plants is autotrophs that photosynthesize which is the characteristic of plant-like protists. Plant-like protists are autotrophs, use carbon dioxide and water to produce glucose by the process of photosynthesis.
1. In apothecaries' measures: 1 scruple = 20 grains, 1 ounce = 480 grains, 1 oz = 28.34 g
What is the mass in micrograms of 5.00 scruples? Remember the known and the
unknown?!
Answer:
5.89 g × 10⁶ μg
Explanation:
Step 1: Convert 5.00 scruples to grains
We will use the conversion factor 1 scruple = 20 grains.
5.00 scruple × 20 grain/1 scruple = 100 grain
Step 2: Convert 100 grains to ounces
We will use the conversion factor 1 oz = 480 grains.
100 grain × 1 oz/480 grain = 0.208 oz
Step 3: Convert 0.208 oz to grams
We will use the conversion factor 1 oz = 28.34 g.
0.208 oz × 28.34 g/1 oz = 5.89 g
Step 4: Convert 5.89 g to micrograms
We will use the conversion factor 1 g = 10⁶ μg.
5.89 g × 10⁶ μg/1 g = 5.89 g × 10⁶ μg
The mass in micrograms of 5 scruples is 5.9×10⁶ μg
We'll begin by converting 5 scruples to grains.
1 scruple = 20 grains
Therefore,
5 scruples = 5 × 20
5 scruples = 100 grains Next, we shall convert 100 grains to grams480 grains = 1 ounce
But
1 ounce = 28.34 g
Thus, we can say that
480 drains = 28.34 g
Therefore,
100 grains = (100 × 28.34) / 480
100 grains = 5.9 grams Finally, we shall convert 5.9 grams to micro grams1 g = 1×10⁶ μg
Therefore,
5.9 g = 5.9 × 1×10⁶ μg
5.9 g = 5.9×10⁶ μgTherefore, 5 scruples is equivalent to 5.9×10⁶ μg
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How many milliliters of 0.2560 M KCl solution will contain 20.00 g of KCl?
Answer is 1048 mL solution but how do I get to the answer?
Answer:
1048 mL
Explanation:
Step 1: Given data
Concentration of the solution: 0.2560 MMass of KCl (solute): 20.00 gStep 2: Calculate the moles corresponding to 20.00 g of KCl
The molar mass of KCl is 74.55 g/mol.
20.00 g × 1 mol/74.55 g = 0.2683 mol
Step 3: Calculate the volume of the solution
Molarity is equal to moles of solute divided by liters of solution.
M = moles of solute / volume of solution
volume of solution = moles of solute / M
volume of solution = 0.2683 mol / (0.2560 mol/L)
volume of solution = 1.048 L = 1048 mL
Nitric acid and nitrogen monoxide react to form nitrogen dioxide and water, like this: (aq)(g)(g)(l) At a certain temperature, a chemist finds that a reaction vessel containing a mixture of nitric acid, nitrogen monoxide, nitrogen dioxide, and water at equilibrium has the following composition: compoundamount Calculate the value of the equilibrium constant for this reaction. Round your answer to significant digits.
Answer:
The reaction given is
Chemistry homework question answer, step 1, image 1
Since in equilibrium constant expression, the concentration of liquid components is not written.
Hence the equilibrium constant expression for the above reaction can be written as
Chemistry homework question answer, step 1, image 2
where [NO] = equilibrium concentration of NO
[NO2 ] = equilibrium concentration of NO2
[HNO3 ] = equilibrium concentration of HNO3
Step 2
Given : mass of NO at equilibrium = 18.6 g
mass of NO2 at equilibrium = 15.1 g
and mass of HNO3 at equilibrium = 13.1 g
Since molar mass of HNO3 = 63 g/mol, molar mass of NO = 30 g/mol and molar mass of NO2 = 46 g/mol
Hence the moles of gases at equilibrium are
Chemistry homework question answer, step 2, image 1
Step 3
Since mass of solution = mass of HNO3 + mass of water = 13.1 + 234.8 = 247.9 g
Assuming density of solution = density of water = 1.00 g/mL
=> mass of solution = volume of solution X density of solution
=> 247.9 = 1.00 X volume of solution
=> volume of solution = 247.9 mL = 0.2479 L
Explanation:
How tightly particles are packed determines what state it takes.
True or False
Answer:
True
Explanation:
tighter the molecules the slower it moves and the harder it gets
solid has very tight particles packed together
gas has its particles spread out
HNO3 + Sn + H2O → H2SnO3 + NO
By algebraic method pls
Answer:
3Sn + 4HNO3 + H2O → 3H2SnO3 + 4NO
What is the percent by mass of water in the hydrate Na2CO3.10H20 (formula mass = 286)?
Calculation: Molar mass of water = 180 % of water = > 180/286*100 = > 62.93%.
Answer: the percent by mass of water in the hydrate Na2CO3.10H20 is 62.93%.
what is the method of seperating inmisible liquid
with recessions government spending should
decrease
increase
or allowed to remain the same increased
Answer:
Increase to pay unemployment and get the economy back up
almunium has a density of 2.70g/cm3. how many moles of aluminium are in a 13.2cm3 block of the metal substances?
Answer:
1.32 moles.
Explanation:
From the question given above, the following data were obtained:
Density of Al = 2.70 g/cm³
Volume of Al = 13.2 cm³
Number of mole of Al =.?
Next, we shall determine the mass of Al.
This can be obtained as follow:
Density of Al = 2.70 g/cm³
Volume of Al = 13.2 cm³
Mass of Al =?
Density = mass / volume
2.7 = mass of Al / 13.2
Cross multiply
Mass of Al = 2.7 × 13.2
Mass of Al = 35.64 g
Finally, we shall determine the number of mole of Al. This can be obtained as follow:
Mass of Al = 35.64 g
Molar mass of Al = 27 g/mol
Number of mole of Al =?
Mole = mass / molar mass
Number of mole of Al = 35.64 / 27
Number of mole of Al = 1.32 moles
Thus, 1.32 moles of aluminum are present in the block of the metal.