Answer:
Molar mass = 27.88 g/mol
Explanation:
The relationship between how gases effuses is given by Graham's law of effusion. This law is given as;
Rg / Rxe = [tex]\sqrt{}[/tex](Mxe / Mg)
Where;
Rg = Rate of effusion of gas g
RXe = Rate of effusion of Xe
Mxe = Molar mass of Xe = 131.29 g/mol
Mg = Molar mass of gas g
From the question;
Rg : Rxe = 2.17 : 1
Rg / Rxe = 2.17 / 1 = 2.17
2.17 = [tex]\sqrt{}[/tex]131.29 / Mg
Squaring both sides
4.7089 = 131.29 / Mg
Mg = 131.29 / 4.7089
Mg = 27.88 g/mol
Weather, erosion and deposition will change the environment over time. When water runs over rocks it can smooth out jagged edges and even leave streak on the surface of the rock. This is an example of _____________.
Answer:
erosion.
Explanation:
Draw both the chair and boat conformation of 1,4-dimethylcyclohexane with the methyl groups as cis and trans for both conformations. Label your molecules for cis and trans. Tell which is the highest in energy.
Answer:
Boat conformation cis 1,4-dimethyl cyclohexane has the highest energy.
Explanation:
From the conformations, the boat conformation cis 1,4-dimethyl cyclohexane is least stable due to the fact that two methyl groups are located in opposite direction to each other, this leads to the production of a higher strain. Similarly, Chair conformations appear more stable than boat conformation. Hence, energy is inversely proportional to stability. As a result of the aforementioned, boat conformation cis 1,4-dimethyl cyclohexane has the highest energy.
How are food webs and food chains related? HELP IF YOU WANT BRAINLEIST!!
Food webs only contain consumers.
Food webs consist of only one food chain.
Food webs are made of many food chains.
Food webs only contain producers.
Answer: Food webs are made of many food chains is the answer.
Explanation:
Food web consists many food chains.
Determine the molar mass of Cao
Answer:
Molar mass of CaO
(40 + 16)g
= 56g
hope it helps you
which element can form an oxide with the general formula m2o or mo where m is a metal
Answer:
Because the compound has a formula of M2O, the number of valence electrons of M should be 1. Therefore, (1) Group 1 is the correct answer because elements in group 1 have 1 valence electron.
Explanation:
What is the molecular formula for a compound with a molar mass of 42.08g/mol and an empirical formula of ch2
Answer:
[tex]C_3H_6[/tex]
Explanation:
Hello!
In this case, since the empirical formula is the smallest representation of the molecular formula, it is known that the times in which the empirical formula is into the molecular formula is a whole number and is computed by dividing the molar mass of the molecular formula by that of the empirical formula as shown below:
[tex]\frac{42.08g/mol}{12.01+1.01x2}= \frac{42.08g/mol}{14.03g/mol}=3[/tex]
Thus, the molecular formula times the empirical formula by 3 to obtain:
[tex]C_3H_6[/tex]
Regards!
which of the following statements are part of the kinetic molecular theory ?
Answer: The average kinetic energy is proportional to the absolute temperature of the gas. Gas particles are in random motion. Gas particles have no volume. And the collisions between gas particles are elastic.
Explanation: I heard this question before, I think. Hope this helps!
Identify the characteristics of a good recrystallization solvent. Select one or more: Is not an organic liquid with a low boiling point. Dissolves a chemical sample well at high temperatures. Does not dissolve a chemical sample well at high temperatures. Does not dissolve a chemical sample well at low temperatures. Dissolves a chemical sample well at low temperatures.
Answer:
Dissolves a chemical sample well at high temperatures.
Does not dissolve a chemical sample well at low temperatures.
Explanation:
Recrystallization is a purification technique that involves mixing of an impure solid compound with a hot solvent leading to a saturated solution. As this solution cools, the compound to be purified becomes less soluble in the solvent, and pure crystals appear from the solution as the solution cools.
A good recrystallization solvent should
Not dissolve the compound that we want to purify at room temperature Dissolve the compound completely only at the solvent's boiling point Dissolve all the soluble impurities in the sample very well at room temperature.Have a fairly low boiling point such that its boiling point is lower than the melting point of the compound to be purified and evaporates easily when air-drying the sample.Which of the following is NOT an advantage of a wireless network? convenience reliability security speed
Answer:
Security
Explanation:
A wireless network consists of good connection with fast speed, convenience, and reliability. Security is a major problem with wireless connection as someone can get your information by joining the same connection as you.
(1132 CHCH2CH = CH2
12. Give the complete IUPAC name for each of the following compounds:
(a) (CH3)2CHF
(b) CH3CHCICHCICH3
(C)
CH3CHCH;
CH2CH3
(d) CH3 CH2 CH = CHCHZ
(e)
CH3CH2CH2CHBCH2CH3
CH2CH=CH2
Answer:
Ok:
Explanation:
a) 2-fluoropropane
b) 2,3 dichlorobutane
c) pent-2-ene or 2 pentene (I assume the semicolon was a typo)
d) Same as c (I assume Z is a typo too)
e) non-1-ene or 1-nonene (I assume the B is a 2)
Which of the following is a radioactive element?Sodium, Fluorine,Oxygen
francium
Answer:
Fluorine
Explanation:
These particles stick in the atoms and make them radioactive.
(1) Phosphorus silicon is a semi-conductor
When Silicone is altered with Phosphorus, 4 of its electrons form covalent bonding and the 5th electron becomes delocalized and thus it increases electrical conduction
Answer:
blue blah blue blah
Explanation:
what is the answer to this question?
Answer:
Vertebrae
Explanation:
Vertebrae are the 33 individual bones that interlock with each other to form the spinal column. The vertebrae are numbered and divided into regions: cervical, thoracic, lumbar, sacrum, and coccyx (Fig. 2). Only the top 24 bones are moveable; the vertebrae of the sacrum and coccyx are fused.
I believe the answer is vertebrae. There are 24 bones stacked up on each other that make up your backbone.
Do earthquakes occur at convergent plate boundaries?
Yes or no?
Answer:yes
Explanation:
grams can be converted to moles and vice versa which conversion factors is/are used for this
Answer:
Converting Grams to Moles of an Element and Vice Versa.
We can convert back and forth between grams of an element and moles.
The conversion factor for this is the molar mass of the substance. The molar mass is the ratio giving the number of grams for each one mole of the substance
molar mass is the factor
Grams can be converted to moles and vice versa so the conversion factor which is used for this is molar mass.
How do we convert mass into moles?Mass of any substance will be converted into moles by using the below equation:
n = W/M, where
n = moles
W = given mass
M = molar mass
By using the above formula we can convert the mass of any object to moles and moles to mass.
Hence conversion factor which is used for this is molar mass(M).
To know more about mass & moles, visit the below link:
https://brainly.com/question/24639749
#SPJ2
A sample of gas has a density of 0.53 g/L at 225 K and under a pressure of 108.8 kPa. Find the density of the gas at 345 K under a pressure of 68.3 kPa. Assuming the mass is equal to 1 gram.
Answer:
[tex]\rho _2=0.22g/L[/tex]
Explanation:
Hello!
In this case, since we are considering an gas, which can be considered as idea, we can write the ideal gas equation in order to write it in terms of density rather than moles and volume:
[tex]PV=nRT\\\\PV=\frac{m}{MM} RT\\\\P*MM=\frac{m}{V} RT\\\\P*MM=\rho RT[/tex]
Whereas MM is the molar mass of the gas. Now, since we can identify the initial and final states, we can cancel out R and MM since they remain the same:
[tex]\frac{P_1*MM}{P_2*MM} =\frac{\rho _1RT_1}{\rho _2RT_2} \\\\\frac{P_1}{P_2} =\frac{\rho _1T_1}{\rho _2T_2}[/tex]
It means we can compute the final density as shown below:
[tex]\rho _2=\frac{\rho _1T_1P_2}{P_1T_2}[/tex]
Now, we plug in to obtain:
[tex]\rho _2=\frac{0.53g/L*225K*68.3kPa}{345K*108.8kPa}\\\\\rho _2=0.22g/L[/tex]
Regards!
which is a characteristics of all ions
Answer:
All ions must a overall charge
Explanation:
Answer:
i belive its B
Explanation:
List all possible oxidation numbers for the elements. 21. Al
22. Bi
23. Ni
24. Xe
25. Pb
Answer:
21. Al (Aluminium)
+3 (most common), -1, -2, +1, +2
22. Bi (Bismuth)
+3 (most common), -3, -2, -1, +1, +2, +4, +5
23. Ni (Nickel)
+2 (most common), -2, -1, 0,+1, +3, +4
24. Xe (Xenon)
0 (most common), +1, +2, +4, +6, +8
25. Pb (Lead)
+2 (most common), +4 (most common), -4, -2, -1, +1, +3
Explanation:
Now we proceed to present the answers for each element:
21. Al (Aluminium)
+3 (most common), -1, -2, +1, +2
22. Bi (Bismuth)
+3 (most common), -3, -2, -1, +1, +2, +4, +5
23. Ni (Nickel)
+2 (most common), -2, -1, 0,+1, +3, +4
24. Xe (Xenon)
0 (most common), +1, +2, +4, +6, +8
25. Pb (Lead)
+2 (most common), +4 (most common), -4, -2, -1, +1, +3
What are the outcomes of the ice cap melting? Choose all that apply.
1. Light cannot be reflected back to the atmosphere
2. Sea level rises
3. Absorption of solar radiation leads to increase in ocean temperature
4. Ocean remains unaffected
Answer:
2. sea level rises sorry if it's wrong
Which animal is a primary consumer in the Ethiopian Highlands?
Answer:
I believe it is the Ethiopian ibex
Explanation:
Answer:
I think it the Ethiopian ibex
Explanation:
im srry if it wrong.
hope this helps tho
Which of the following conditions does not affect equilibrium?
A. Particle Size
B. None of these
C. Concentration
D. Pressure
Answer:
B. None of these
Explanation:
If 4.55 moles of hydrogen were reacted with excess nitrogenin the equations N2 + 3 H2 = 2 NH3 and 48.7 g of ammonia product was recovered what would be the percent yield of the reaction?
Answer:
Percent yield = 94.5%
Explanation:
Given data:
Number of moles of hydrogen = 4.55 mol
Mass of ammonia recovered = 48.7 g
Percent yield of ammonia = ?
Solution:
Chemical equation:
N₂+ 3H₂ → 2NH₃
Now we will compare the moles of ammonia and hydrogen.
H₂ : NH₃
3 : 2
4.55 : 2/3×4.55 = 3.03 mol
Theoretical yield of ammonia:
Mass = number of moles × molar mass
Mass = 3.03 mol × 17 g/mol
Mass = 51.51 g
Percent yield:
Percent yield = ( actual yield / theoretical yield ) × 100
Percent yield = (48.7 g/ 51.51 g) × 100
Percent yield = 0.945 × 100
Percent yield = 94.5%
What mass of hydrogen is required to react with 24.7 g of nitrogen?
Answer:
10.80 g of H2
Explanation:
As per the equation, let us calculate the mole ratio. N2+3H2→2NH3. As per the equation one mole of nitrogen
How many pounds of gold ore would need to be processed to obtain 5 grams of gold (Au) if the ore is 0.1% gold by mass?
Pounds of gold ore : 11,02311
Further explanationGiven
5 g of gold
0.1% gold by mass
Required
Pounds of gold ore
Solution
[tex]\tt \%mass~gold=\dfrac{mass~gold}{mass~ore}\times 100\%[/tex]
For percent mass = 0.1%, than mass of gold ore :
[tex]\tt 0.1\%=\dfrac{5~g}{mass~ore}\times 100\%\\\\mass~ore=\dfrac{5\times 100}{0.1}\\\\mass~ore=5000~g[/tex]
Conversion factor :
1 g = 0,00220462 pound, than for 5000 g = 11,02311 pounds
I will give Branliest! This is a breakoutedu thing and I can't figure this out for the life of me! Please help!
Answer:
I THINK ITS 9.8.0.6.6Explanation:
I HOPE IT HELPS :)
Tell me this why don't water stop my mouth from burning but milk or malk does this s for 32 points
Answer:
water spreads the spicy taste around your mouth, while milk does not and it helps the hot taste go away.
Explanation:
Answer:
water makes ur mouth burn more but milk it helps bc of what's in it
3) Tears are produced by the lacrimal glands located:
A) above the lateral canthus of each eye
B) below the medial canthus of each eye
C) below the lateral canthus of each eye
D) above the medial canthus of each eye
E) behind the nasal bones
What could possibly happen if we mix plan old powdered sugar with colorless,odorless sulfuric acid?PLEASE HELP
10 points!!!!!!!!!!!!!!!!!!!!!!!!!!
Answer:
B
Explanation:
i think the filtering would make it possible to separate the liquids....
Answer:
My friend is guessing so she says it's letter C
Explanation:
Sorry if she is wrong.
What mass of solid aluminum hydroxide can be produced when 50.0mL of 0.200M aluminum nitrate is added to 200.0mL of 0.100M potassium hydroxide
Answer:
520 mg Al(OH)₃
Explanation:
The reaction that takes place is:
Al(NO₃)₂ + 3KOH → Al(OH)₃ + 3KNO₃Now we calculate how many moles of each reagent were added, using their concentrations and volumes:
Al(NO₃)₂ ⇒ 50.0 mL * 0.200 M = 10 mmol Al(NO₃)₂ KOH ⇒ 200.0 mL * 0.100 M = 20 mmol KOH10 mmol of Al(NO₃)₂ would react completely with (10*3) 30 mmol of KOH, there are not as many KOH mmol, so KOH is the limiting reactant.
We calculate how many moles of Al(OH)₃ are produced, using the limiting reactant:
20 mmol KOH * [tex]\frac{1mmolAl(OH)_3}{3mmolKOH}[/tex] = 6.67 mmol Al(OH)₃Finally we convert mmol of Al(OH)₃ to mg, using its molar mass:
6.67 mmol Al(OH)₃ * 78 mg/mmol = 520 mg Al(OH)₃