Answer:
Explanation:
Whenever you see molar masses in gas law questions, more often than not density will be involved. This question is no different. To solve this, however, we will first need to play with the combined ideal gas equation PV=nRT to make it work for density and molar mass. The derivation is simple but for the sake of time and space, I will skip it. Hence, just take my word for it that you will end up with the equation:M=dRTPM = molar mass (g/mol)d = density (g/L)R = Ideal Gas Constant (≈0.0821atm⋅Lmol⋅K) T = Temperature (In Kelvin) P = Pressure (atm)As an aside, note that because calculations with this equation involve molar mass, this is the only variation of the ideal gas law in which the identity of the gas plays a role in your calculations. Just something to take note of. Back to the problem: Now, looking back at what we're given, we will need to make some unit conversions to ensure everything matches the dimensions required by the equation:T=35oC+273.15= 308.15 KV=300mL⋅1000mL1L= 0.300 LP=789mmHg⋅1atm760mmHg= 1.038 atmSo, we have almost everything we need to simply plug into the equation. The last thing we need is density. How do we find density? Notice we're given the mass of the sample (0.622 g). All we need to do is divide this by volume, and we have density:d=0.622g0.300L= 2.073 g/LNow, we can plug in everything. When you punch the numbers into your calculator, however, make sure you use the stored values you got from the actual conversions, and not the rounded ones. This will help you ensure accuracy.M=dRTP=(2.073)(0.0821)(308.15)1.038= 51 g/molRounded to 2 significant figuresNow if you were asked to identify which element this is based on your calculation, your best bet would probably be Vandium (molar mass 50.94 g/mol). Hope that helped :)
What is represented in the image?
A: a space-filling model
B: a ball-and-stick model
C: a chemical formula
D: a structural formula
Answer:
A structural formula is shown, making the answer D.
How would Bohr model show the protons in a carbon atom
Answer:
The Bohr model show the protons in a carbon atom using the model; "Electrons move in fixed orbits around a nucleus of protons and neutrons."
According to Bohr's model of the atoms, the Rutherford model is basically correct. This implies that Bohr model accepts the idea of a nucleus containing nucleons(protons and neutrons).
In addition, the model also postulates that electrons are found in fixed orbits. These fixed orbits are called energy levels or shells.
A graphic description of this is shown in the image attached to this answer.
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Explanation:
Go why?yes but why but no sense so help but yes by hypothesis
Answer:
follow hypothesis bud
Explanation:
yep
Spell out the full name of the compound?
How many orbitals are in Phosphorus
Complete the balanced dissociation equation , help please!
Answer:
Al3Br1 -> Al1Br3
Explanation:
I believe you just swap it but I’m not 100%
Write and balance tin and copper(ii) oxide react to form copper and tin IV oxide
Answer:
tin Is more reactive than copper so it reduces oxygen from copper
Calculate the molarity of (3.25 mol of LiCl in 2.78 L solution
[tex]\text{Morality}= \dfrac{\text{Number of moles}}{\text{Volume}}=\dfrac{3.25}{2.78}=1.169 ~mol/L[/tex]
Metals can be distinguished by dissolving them in fuel and them burning that fuel. For example, calcium will turn orange and copper will turn green. Is this because of blackbody radiation or atomic transitions that you see in line spectra?
Copper will turn green and calcium will turn orange. this is as a result of the atomic transitions visible in line spectra
What components make up transitions?Transition elements are substances with partially filled d orbitals, sometimes referred to as transition metals. According to IUPAC, a transition element is an element with a partially filled d subshell or one with the capacity to create stable cations that has an unfilled d orbital.
Why are transitional elements called that?As a result of their transitional behavior between s-block or p-block elements, the d-block elements are referred to as transition elements. Their characteristics are intermediate between those of the covalently-bonded, highly reactive s-block metallic elements and those of the p-block elements.
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Please help me
Phylum ___________ contains organisms that have a cutic|e; a f|exible protective covering.
Answer:
B Nematoda
Explanation:
Question
How does physical states of a pharmaceutical dosage
form
(Solid,liquid or gas) influence the overall stability and
Storage of the formulated pharmaceutical
product
Answer:
it,s is so many people do you want to go then
you are not study then stage change of it
______ contributes to the nitrogen cycle by removing nitrogen from the air and converting it into a form that is usable by plants.
A. earthworms
B. bacteria
C. fungi
D. plants
Answer:
bacteria
Explanation:
Bacteria removes nitrogen from the air and converts it into a form that is usable by plants.
Answer:
Bacteria
Explanation:
I took the test and got it right
Which property of liquids creates a meniscus in
glass tubes as seen in the picture?
O adhesion
O
cohesion
O melting point
polarity
ANSWER IS ADHESION
The property of liquid that create meniscus in glass tubes is Adhesion
What is Adhesion?Adhesion is the property of liquid in which two different or disimillar molecules or surfaces to cling to each other. For example, solids have a very high cohesive properties and this make them not to stick to the surfaces they come in contact.
Therefore, Adhesion property of liquids creates a meniscus in glass tube.
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Answer:
Adhesion
Explanation:
A 30.4ml sample of 2.38 M solution of KCI (molar mass = 74.55 g/mol) is prepared. How many grams of KCI are in the solution?
Do not report units in your answer. Report your answer with two places past the decimal point.
ignore this, it wont let me exit this screen/ tab for some reason..
In this circuit, energy is transferred from a battery to a circuit wire and then to a light bulb, where some of it leaves the system. Starting from the battery, which series shows the correct order of energy transformations taking place in this circuit?
light and heat
chemical
electrical
put them in order
Answer:
chemical electrical light heat
please help and show work will be picking brainliest
Answer:
34x4v
Explanation:
ik it is write
The ion with 86 electrons, 142 neutrons, and a 4+ charge
[tex]\qquad\qquad\huge\underline{{\sf Answer}}♨[/tex]
The ion had 4+ charge when it had 86 electrons, so it should have no charge on it if there are 4 more electrons and the atom will be neutral.
And since we know that number of electrons in a neutral atom is equal to Atomic Number of that atom.
So, at neutral phase, it had 86 + 4 = 90 electrons
hence, our required atom is : Thorium
And it's ion will be ~[tex]\sf Th^{4+} [/tex]
➖➖➖➖➖➖➖➖➖➖➖➖➖➖➖➖➖
A sample of 85.5 g of tetraphosphorous decoxide (P4O10) reacts with 74.9 g of water to produce phosphoric acid (H3PO4) according to the following balanced equation.
P4O10+6H2O⟶4H3PO4
Determine the limiting reactant for the reaction.
H2O
H3PO4
P4O10
Calculate the mass of H3PO4 produced in the reaction.
mass of H3PO4:
g
Calculate the percent yield of H3PO4 if 39.2 g of H3PO4 is isolated after carrying out the reaction.
percent yield:
%
The limiting reactant here is P4O10 . The percent yield of the product is caculated as 33.3%.
What is the limiting reactant?The limiting reactant is the reactant that is in a minute quantity.
Number of moles of P4O10 = 85.5 g/284 g/mol = 0.3 moles
Number of moles of H2O = 74.9 g / 18 g/mol = 4.2 moles
From the reaction equation;
1 mole of P4O10 reacts with 6 moles of H2O
x moles of P4O10 reacts with 4.2 moles of H2O
x = 0.7 moles
Hence, P4O10 is the limiting reactant.
1 mole of P4O10 yields 4 moles of H3PO4
0.3 moles of P4O10 yields
0.3 moles * 4/1 = 1.2 moles
Mass of the H3PO4 = 1.2 moles * 98 g/mol = 117.6 g
Percent yield = 39.2 g/117.6 g * 100/1 = 33.3 %
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All of the following are sources of air pollution EXCEPT
-mobile sources
- Factories
-scrubbers
-Landfills
Answer:
Mobile sources
..........................
Hellpp I don’t understand this
Answer:
Can you repost this but flip it? It’s upside down rn
Explanation:
Choose all that apply for neap tides
Moon and sun are at right angles to the earth
Moon, sun, and earth are all in alignment
Smaller than normal range of highs and low tides
Gravity of the sun and moon work against each other
Answer:
1. Moon and sun are at right angles to the earth
2. Smaller than normal range of highs and low tides
3. Gravity of the sun and moon work against each other
What temperature creates hail
Answer:
32 °F
Formation. Hail forms in strong thunderstorm clouds, particularly those with intense updrafts, high liquid water content, great vertical extent, large water droplets, and where a good portion of the cloud layer is below freezing 0 °C (32 °F).
Explanation:
brainlist me and that's all I know and we have the same module I guess
What is the definition of spring scale?
1. What is the relation between distance and speed?
a) distance= speed x time
b) distances speed / time
c) distance= time / speed
d) None of these
Answer:
option no b is right answer
Answer:
b
Explanation:
You open the refrigerator and take out a slice of leftover pizza. You put it in the microwave oven, turn it on, and watch for the cheese to start bubbling. You take a bite of the pizza and realize it is too hot, so you let it sit on the counter for a minute. When the pizza is finally cool enough to eat, you enjoy your lunch. Identify three examples of energy transfer in the scenario.
Pick up to 3 answers.
A. Electromagnetic (microwave) energy is transferred from the refrigerator to the pizza in the refrigerator.
B. Electromagnetic (microwave) energy is transferred from the microwave to the pizza in the microwave oven.
C. Heat energy is transferred from the pizza to the room as the pizza cools on the counter.
D. Heat energy from the warm pizza is transferred from the pizza into the mouth chewing it.
E. Heat energy from the room is transferred into the pizza as it comes out of the microwave oven.
Answer:
C,B,(D or A)
Explanation:
To gain an understanding of mixture and the concept of separate of mixture,prepare an article to help feeding mother in your community to find the element of iron in iron-fortified breakfast cereal flakes .through this article the mother should be able to see how the iron compenent of this mixture (cereal) retains its properties and can thus be separated by physical means
Answer:
you ask questions that are too hard!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!1
Explanation:
How much heat is required to raise the temperature of 1,500 g of water from 25°C to 52°C? The specific heat of water is 4.184 J/g-oC.
Apply thermodynamics
[tex]\\ \rm\rightarrowtail Q=mc\delta T[/tex]
Q is heat[tex]\\ \rm\rightarrowtail Q=1500(4.184)(27)[/tex]
[tex]\\ \rm\rightarrowtail Q=169452J[/tex]
19. For the reaction HCl + NaOH → NaCl + H2O, how many moles of hydrochloric acid are required to
produce 150. g of water?
a. 12.2 mol
b. 4.16 mol
c. 8.32 mol
d. 1.50 mol
Answer:
c, 8.32 mol
Explanation:
the molecular mass of water is about 18.02, to get the moles of water 150/18.02=8.32 mol, since the coefficients of HCl and H2O are the same, the number of moles would be the same as well
This particle, an/a ___ has a negative charge
Answer:
Explanation:
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This particle, an/a ___ has a negative charge
The COD of a water sample is found to be 30 mg of O, per liter. What vol- ume of 0.0020 MK,Cr, will be required to titrate a 50-ml sample of the water…
The COD of a water sample is found to be 30 mg of O, per liter. What vol- ume of 0.0020 MK,Cr, will be required to titrate a 50-ml sample of the ains the same throughout the diagram. OC The graph starts at a lower energy value and ends at a higher energy value. Od The potential energy of the products is equal to the potential energy of the reactants.
Energy and Chemical Reactions: Mastery Test 4 Select the correct answer. Which factor is defined as the average kinetic energy of a substance? A. the …mass of the substance B. the volume of the substance C. the pressure of the substance D. the temperature of the substance
2 Select the correct answer. Which is a form of kinetic energy? OA gravitational energy OB. chemical energy OC. electrical energy D. sound energy
23.4 grams of Al2(SO3)3 is yielded through a chemical reaction. How many moles is this?
What is the solubility of NaNO3 at 75C (graphed)
5. Find the molecular formula for a compound with a mass of 40 amu and the empirical formula C2H4.
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The density of chlorine gas at 0.970 atm and 29.8 °C is ________ g/L.
Answer:
d=3.95 g/l
Explanation:
1) Ideal gas equation:
pV = nRT
2) Transform the equation to compute density, d = m / V
n = mass in grams / molar mass = m / MM
pV = (m/MM) RT
=> pV = mRT/MM
=> m/V = pMM / (RT)
d = pMM / (RT)
p = 1.21 atm
MM = 83.80 g/mol (this is the atomic mass of krypton element)
T = 50 + 273.15 K = 323.15K
3) Compute:
d = (1.25 atm * 83.80 g/mol) / (0.0821 atm*liter /K*mol * 323.15K)