Answer:
26.9 L.
Explanation:
Hello there!
In this case, since the ideal gas equation is able to provide us the volume of neon in 1.2 moles by considering the STP conditions (1.00 atm and 273.15 K) via its mathematical definition:
[tex]PV=nRT[/tex]
We first need to solve for V in the aforementioned equation:
[tex]V=\frac{nRT}{P}[/tex]
So we plug in to obtain:
[tex]V=\frac{1.2mol*0.08206\frac{atm*L}{mol*K}*273.15K}{1.00atm}\\\\V=26.9L[/tex]
Best regards!
In a first order decomposition, the constant is 0.00813 sec-1. What percentage of the compound has decomposed after 44.1 seconds
Answer:
69.8%
Explanation:
k = 0.00813 sec-1
t = 44.1 s
What percentage of the compound has decomposed?
We can obtain this using the formular;
[A] = [A]o e^(-kt)
where;
Final Concentration = [A]
Initial concentration = [A]o
[A] / [A]o = e^(-kt)
[A] / [A]o = e^(-0.00813*44.1)
[A] / [A]o = e^(-0.359)
[A] / [A]o = 0.698
Percentage decomposed = Final Concentration / Initial concentration * 100
Percentage decomposed = [A] / [A]o * 100%
Percentage decomposed = 0.698 * 100 = 69.8%
Based on the data given, the percentage decomposed in the first order reaction is 69.8%
What percentage of the compound has decomposed after 44.1 seconds?From the data provided;
rate constant, k = 0.00813 sec-1
time, t = 44.1 s
Since the reaction is first order, we calculate using the formula below:
[A] = [A]₀ e^(-kt)where;
[A] is final concentration[A]₀ is initial concentrationFinding the ratio of final and initial concentration
[A]/[A]₀ = e^(-kt)
Substituting the values:
[A]/[A]₀ = e^(-0.00813 * 44.1)
[A]/[A]₀ = e^(-0.359)
[A]/[A]₀ = 0.698
Percentage decomposed = [A]/[A]₀ * 100%
Percentage decomposed = 0.698 * 100%
Percentage decomposed = 69.8%
Therefore, the percentage decomposed in the first order reaction is 69.8%.
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How many grams are in 2.49 x 10^24 atoms of Hg?
Answer:
[tex]m_{Hg}=829.4gHg[/tex]
Explanation:
Hello there!
In this case, considering the Avogadro's number, which helps us to realize that 1 mole of mercury atoms contains 6.022x10²³ atoms and at the same time 1 mole of mercury weights 200.59 g, we obtain:
[tex]m_{Hg}=2.49x10^{24}atoms*\frac{1mol}{6.022x10^{23}atoms} *\frac{200.59g}{1molHg}\\\\m_{Hg}=829.4gHg[/tex]
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Wine goes bad soon after opening because the ethanol dissolved in it reacts with oxygen gas to form water and aqueous acetic acid , the main ingredient in vinegar. Calculate the moles of acetic acid produced by the reaction of of oxygen. Be sure your answer has a unit symbol, if necessary, and round it to the correct number of significant digits.
Answer:
1.70 mol
Explanation:
Wine goes bad soon after opening because the ethanol dissolved in it reacts with oxygen gas to form water and aqueous acetic acid, the main ingredient in vinegar. Calculate the moles of acetic acid produced by the reaction of 54.4 g of oxygen. Be sure your answer has a unit symbol, if necessary, and round it to the correct number of significant digits.
Step 1: Write the balanced equation
CH₃CH₂OH + O₂ ⇒ CH₃COOH + H₂O
Step 2: Calculate the moles corresponding to 54.4 g of O₂
The molar mass of O₂ is 32.00 g/mol.
54.4 g × 1 mol/32.00 g = 1.70 mol
Step 3: Calculate the moles of CH₃COOH produced by the reaction of 1.70 moles of O₂
The molar ratio of O₂ to CH₃COOH is 1:1. The moles of CH₃COOH produced are 1/1 × 1.70 mol = 1.70 mol.
The most prominent feature of ocean topography discovered in the 1960s was:
a mountain ridge which circles the earth
subduction zones
volcanic activity at the ocean bottom
seamounts
answer:
a mountain ridge which circles the earth
subduction zones
A radio wave travels 186,000 miles per second. How many kilometers will the wave travel in one microsecond? (1 mile = 1.61 km)
need steps and formela
write the balanced chemical equation for lab preparation of oxygen gas by using heat
Answer:
O + O ---Δ----> O2
Explanation:
plz follow me friend
Answer:
hello my ne is yash follow me please
Hydrogen gas is a product of the reaction of
magnesium with hydrochloric acid. How many
liters of hydrogen gas are produced from the
complete reaction of 146.5 g magnesium metal at
2.40 atm and a temperature of 314 K?
(Mg = 24.30 g/mol)
Mg(s) + 2HCl(aq) → MgCl2(aq) + H2(g)
Hint: R = 0.0821 L atm/(mol K)
Answer:
64.7
Explanation:
Answer:
64.7 is the answer
hope this helps
have a good day :)
Explanation:
what could have caused the mass to be higher than the initial mass
Answer:
Possibly the addition of oxygen from the atmosphere
Explanation:
The absorption of energy from atmosphere causes a rise in mass than the initial mass of a substance.
Absorption of energy can increase the mass of a certain substance while release of energy can decrease the mass of a certain substance. For example, when we freeze liquid water, it forms ice. So, its weight increases when it changes its state from liquid to solid. In the same way when liquid water is boiled, upon vaporization it forms water vapor, which is lighter in mass than liquid water. Thus, we can say that temperature also has a role to play in the increase and decrease of mass of a certain substance compared to its initial mass.
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The question should be
What causes the mass to be higher than the initial mass?
In a chemical equation, the symbol that takes the place of the words reacts with is an) Example HCI + KOH-KCI + H2O
O equal sign
O coefficient
O plus sign
O arrow
Answer: c plus sign
Explanation:
The symbol that is used in the reaction is an equal sign, it is put between reactant and product. The correct option is A, an equal sign.
What is a chemical equation?The representation of a reaction in the equation form is known as a chemical equation.
In the given reaction, the hydrochloric acid and potassium hydroxide undergoes a reaction and produce potassium chloride and water.
The reactants and the products are always divided with an arrow or equal sign.
HCI + KOH = KCI + H2O
Thus, the correct option is A, an equal sign.
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Someone help me all i know it’s not C btw!!!
Answer: A
Explanation: I'm not exactly sure if it is, but I've done similar work to this so
What would happen if the number of protons were greater than the number of electrons in an atom?
Compare the reactivity of magnesium and calcium explain the difference
Answer:
Calcium is more reactive than magnesium because calcium atom is larger than magnesium atom and it has one more energy level. ... Thus Ca is more reactive than Mg.
Use the drop-down menus to label the graph
according to its type.
Answer:
relation (but not a function)
Explanation:
c on edge
Ge(NO2)2 whats the name of this formula?
Answer:
Germanium monoxide
hope this helps :)
Given the following balanced chemical equation:
N2(g) + 3H2(g) + 2NH3(8)
What is the maximum amount of NH3(g) that can be produced from 2.0 mol H2(g)? Assume that N2(g) is the excess reactant.
Answer:
22 g
Explanation:
Step 1: Write the balanced equation
N₂(g) + 3 H₂(g) ⇒ 2 NH₃(g)
Step 2: Calculate the moles of NH₃ produced from 2.0 moles of H₂
The molar ratio of H₂ to NH₃ is 3:2.
2.0 mol H₂ × 2 mol NH₃/3 mol H₂ = 1.3 mol NH₃
Step 3: Calculate the mass corresponding to 1.3 moles of NH₃
The molar mass of NH₃ is 17.03 g/mol.
1.3 mol × 17.03 g/mol = 22 g
Classify each of the following as an element a compound or a mixture
How many atoms are in 4.5 moles of nitrogen
Answer:one mole of stuff (atoms, molecules, eggses), there are NA individual items of that stuff. So, there are 4.5 × NA BCl3 molecules; i.e. 4.5 × 6.022×1023 ≅ 27×1023 individual molecules of BCl3
Explanation:
Answer:
[tex]\boxed {\boxed {\sf About \ 2.7 *10^{24}\ atoms\ N }}[/tex]
Explanation:
To convert from moles to atoms, Avogadro's Number: 6.022*10²³ must be used. This number tells us the amount of particles (atoms, molecules, etc) in 1 mole of a substance. In this case, the particles are atoms of nitrogen.
[tex]\frac {6.022 *10^{23} \ atoms \ N}{1 \ mol \ N}[/tex]
Multiply by the given number of moles: 4.5
[tex]4.5 \ mol \ N *\frac {6.022 *10^{23} \ atoms \ N}{1 \ mol \ N}[/tex]
The moles of nitrogen will cancel.
[tex]4.5 \ *\frac {6.022 *10^{23} \ atoms \ N}{1 }[/tex]
The denominator of 1 can be ignored.
[tex]4.5 \ *{6.022 *10^{23} \ atoms \ N}[/tex]
[tex]2.7099*10^{24} \ atoms \ N[/tex]
The original measurement of moles had 2 significant figures, so our answer must have the same. For the number we calculated, that is the tenth place. The 0 in the hundredth place tells us to leave the 7.
[tex]2.7 *10^{24}\ atoms\ N[/tex]
There are about 2.7*10²⁴ atoms of nitrogen in 4.5 moles.
Electrons help create bonds between elements as they lie on the outside of an
atom.
A boundary formed when two plates collide
What boundary forms when two plates collide
Answer:
If two tectonic plates collide, they form a convergent plate boundary. Usually, one of the converging plates will move beneath the other, a process known as subduction. ... Most divergent plate boundaries are underwater and form submarine mountain ranges called oceanic spreading ridges
Explanation:
Hope this helps
(trying this again because this test is due at 3 and paimon has to get this done or she will fail!! paimon will try to give brainlist if brainly lets her!!)
The _________________molecules in the food we eat are_____________.
A. Enzyme, water
B. Small, insoluble
C. Large, insoluble
D. Enzyme, insoluble
Three mixtures were prepared from three very narrow molar mass distribution polystyrene samples with molar masses of 10,000, 30,000 and 100,000 g mol−1 as indicated below: (a) Equal numbers of molecules of each sample (b) Equal masses of each sample (c) By mixing in the mass ratio 0.145:0.855 the two samples with molar masses of 10,000 and 100,000 g mol−1 For each of the mixtures, calculate the number-average and weight-average molar masses and comment upon the meaning of the values.
Answer:
(a). 46,666.7 g/mol; 78,571.4 g/mol
(b). 86950g/mol; 46,666.7 g/mol.
(c). 86950g/mol; 43,333.33 g/mol
Explanation:
So, we are given the molar masses for the three samples as: 10,000, 30,000 and 100,000 g mol−1.
Thus, the equal number of molecule in each sample = ( 10,000 + 30,000 + 100,000 ) / 3 = 46,666.7 g/mol.
The average molar mass = [ ( 10,000)^2 + (30,000)^2 + 100,000)^2] ÷ 10,000 + 30,000 + 100,000 = 78,571. 4 g/mol.
(b). The equal masses of each sample = 3/[ ( 1/ 10,000) + (1/30,000 ) + (1/100,000) ] = 20930.23 g/mol.
Average molar mass = ( 10,000 + 30,000 + 100,000 ) / 3 = 46,666.7 g/mol.
(c). Equal masses of the two samples = (0.145 × 10,000) + (0.855 × 100,000)/ 0.145 + 0.855 = 86950g/mol.
The weight average molar mass = 1.7 + 10,000 + 100,000/ 1.7 + 1 = 43,333.33 g/mol.
in coca cola the ingridents are : CARBONATED WATER.
HIGH FRUCTOSE CORN SYRUP.
CARAMEL COLOR.
PHOSPHORIC ACID.
NATURAL FLAVORS.
CAFFEINE. my question is that is the caffienne turning it black or the carmel coler
Answer:
Coca-Cola (and other Colas) are dark because food colouring is added to the mixture (caramel colour) to create the traditional colour of colas.
Today we still colour our colas this way, because of tradition: That is the colour colas are supposed to be.
Explanation:
Select the best answer.
What has to happen in order for work to be done?
An object must move in the same direction as the applied force.
All of these.
A force must be applied to an object.
An object must move because of force.
Which of the following is a weak base?
A. KOH (potassium hydroxide)
B. NaOH (sodium hydroxide)
C. NH3 (ammonia)
D. LiOH (lithium hydroxide)
Answer:
C.NH3(ammonia) is Answer.
Explanation:
I hope it's helpful!
Answer:
NH3 (Ammonia)
Explanation:
A student adds a rectangular block of mass 26.10 g to a graduated cylinder initially filled with 40.1 mL of water, but some water
splashes out of the cylinder. As a result, the student reads the new level of the water to be 42.7 ml. Previously, the student had
measured the length, width and height of the block to be 3.0 cm by 1.0 cm by 1.0 cm.
Does the splash cause the volume of the block to be reported as too high or too low, compared to the volume calculated from the
length measurements?
Answer:
The splash cause the volume of the block to be too high
Explanation:
This is because, from the previous measurement made by the student, the volume of the block is 5.7ml higher.
short note on dung fertilization
Answer:
Most manure consists of animal feces; other sources include compost and green manure. Manures contribute to the fertility of soil by adding organic matter and nutrients, such as nitrogen, that are utilised by bacteria, fungi and other organisms in the soil.
Explanation:
Hope it is helpful....
Answer:
Animal manure, such as chicken manure and cow dung, has been used for centuries as a fertilizer for farming. It can improve the soil structure (aggregation) so that the soil holds more nutrients and water, and therefore becomes more fertile. ... Manure is also commercially composted and bagged and sold as a soil amendment.
Explanation:
____ Al + ____ Cr2O3 ____ Al2O3 + ____ Cr
If the reaction of 23.3 grams of Cr2O3 produces 5.35 grams
of Al2O3, what is the percent yield?
Answer:
[tex]Y=34.3\%[/tex]
Explanation:
Hello there!
In this case, according to the balanced chemical reaction:
[tex]2Al + Cr_2O_3 \rightarrow Al_2O_3 + 2Cr[/tex]
We notice there is a 1:1 mole ratio between Al2O3 and Cr2O3; thus, the following stoichiometric setup is used to compute the theoretical yield first:
[tex]m_{Al_2O_3 }=23.3gCr_2O_3*\frac{1molCr_2O_3}{151.99gCr_2O_3} *\frac{1molAl_2O_3}{1molCr_2O_3} *\frac{101.96gAl_2O_3}{1molAl_2O_3} \\\\m_{Al_2O_3}=15.6gAl_2O_3[/tex]
Thus, the percent yield turns out:
[tex]Y=\frac{5.35g}{15.6g} *100\%\\\\Y=34.3\%[/tex]
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Please help me answer this question I need it before 12:59
Answer:
because the brian is like a computer because that both use electrical signals to send messages the brain uses chemicals to transmit information and the computer uses electricity.
Hope that was helpful
How many grams are there in a 3.5 moles of oxygen
Answer:
112 of O2
Explanation:
Now if simply oxygen is given so we'll consider O2
3.5 moles O2 means,
3.5 x 32 = 112 grams of O2
Considering the definition of molar mass, the mass of 3.5 moles of O₂ is 112 grams.
Definition of molar massThe molar mass of substance is a property defined as its mass per unit quantity of substance, in other words, molar mass is the amount of mass that a substance contains in one mole.
The molar mass of a compound (also called Mass or Molecular Weight) is the sum of the molar mass of the elements that form it (whose value is found in the periodic table) multiplied by the number of times they appear in the compound.
Molar mass of O₂In this case, you know the molar mass of the oxygen O is 16 g/mole.
So, the molar mass of the compound O₂ is calculated as:
O₂= 2× 16 g/mole
Solving:
O₂= 32 g/mole
Mass of 3.5 moles of O₂Next, you can apply the following rule of three: If by definition of molar mass 1 mole of the compound contains 32 grams, 3.5 moles of the compound contains how much mass?
[tex]mass= \frac{3.5 molesx32 grams}{1 mole}[/tex]
mass= 112 grams
Finally, the mass of 3.5 moles of O₂ is 112 grams.
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Can some one help I'm lost iam being timed:( Show using two conversion factors how you would convert from 0.020 kg into mg
Answer:
2.0 × 10⁴ mg
Explanation:
Step 1: Given data
Mass (m): 0.020 kg
Step 2: Convert the mass from kilograms to grams
We will use the conversion factor 1 kg = 1,000 g.
0.020 kg × (1,000 g/1 kg) = 20 g
0.020 kg is equal to 20 g.
Step 3: Convert the mass from grams to milligrams
We will use the conversion factor 1 g = 1,000 mg.
20 g × (1,000 mg/1 g) = 2.0 × 10⁴ mg
20 g is equal to 2.0 × 10⁴ mg. Then, 0.020 kg is equal to 2.0 × 10⁴ mg.