Answers
Answer:
0.59 moles
Explanation:
Given mass = 27.4 g
Molar mass of NO₂ = 46 g/mol
We need to find the number of moles. We know that,
No of moles = given mass/molar mass
Put all the values,
[tex]n=\dfrac{27.4}{46}\\\\n=0.59[/tex]
Hence, there are 0.59 moles of NO₂ .
Related Questions
Which of the following phase changes describes what is
happening in the following endothermic process?
H20 (1) + heat --> H2O (g)
O melting
o freezing
o boiling
O condensing
Answers
Answer:
I think the answer is boiling
In your OWN words, what is the difference between a solute, solvent, and solution?
Answers
Answer:A solution is a homogeneous mixture consisting of a solute dissolved into a solvent . The solute is the substance that is being dissolved, while the solvent is the dissolving medium.
Explanation:A solution is a homogeneous mixture consisting of a solute dissolved into a solvent . The solute is the substance that is being dissolved, while the solvent is the dissolving medium.
PLEASEEEEE CAN SOMEONE HELP MEEE??? (iI have TWO questions PLSPLSPLSPSLPLSPLSPLSP)
3.) What happened to Patroclus at the end of yesterday's reading?
He won the battle.
He went to Mt. Olympus to talk to Zeus.
He died.
-------------------------------------------------------------------------------------------------------
4.Who was Agamemnon trying to persuade to come fight with him again?
Patroclus
Achilles
Odysseus
Hector
3. Which model has properties most similar to chlorine?
Model A
Model B
Model C
Model D
Answers
Answer:
bnsjsbbakakaisbsbwnsjznss
Explanation:
cnsjzjsnsnsjs ssnsnsnzksmnznnzna
How can the coefficients in a balanced chemical reaction be used to convert from moles of a reactant to moles of a product?
Answers
The coefficients in a balanced equation can be used as molar ratios, which can act as conversion factors to relate the reactants to the products. These conversion factors state the ratio of reactants that react but do not tell exactly how much of each substance is actually involved in the reaction.
What is the percent by volume of 12.5 mL of ethanol in 250 mL of water?
3%
5%
4%
6%
Answers
90 grams of NaNO3 were added to solution at 10 degrees Celsius. What type of solution was formed?
Answers
Answer:
friend me on here and imma send you the link Explanation:
Polar bears are adapted to stay warm by growing thick fur. These organisms most likely live in a what
Answers
Answer:
They live in the open snow
Explanation:
Which half-reaction shows conservation of charge? * 5 points A) Cu + e– → Cu+ B) Cu2+ + 2e– → Cu C) Cu+ → Cu + e– D) Cu2+ → Cu + 2e–
Answers
Answer:
B) Cu2+ + 2e– → Cu.
Explanation:
Hello there!
In this case, in the regard of redox reactions, we must keep in mind that half-reactions show us how the flow of electrons when an element undergoes a change in its oxidation state, say increasing or decreasing. In such a way, if the element is oxidized, increase the oxidation state, we add electrons on the right side and the contrary if the element is reduced, decrease the oxidation state.
In such a way, we can see that the reaction B) Cu2+ + 2e– → Cu, shows how the Cu2+ cations are reduced by adding electrons to produce Cu and thus, conserve the charge.
Best regards!
you can test carbon dioxide gas with
Answers
Answer:
you can test carbon dioxide gas with calcium hydroxide
hope this is what you're looking for
stay safe and have a nice day
✌◕ ◡ ◕✌
How many moles of Chromium(III) nitrate (Cr(NO3)3) are produced when Chromium reacts with 0.85 moles of Lead(IV) nitrate (Pb(NO3)4) to produce chromium(III) nitrate (Cr(NO3)3) and lead? 4 Cr + 3 Pb(NO3)4 → 4 Cr(NO3)3 + 3 Pb
Answers
Answer:
[tex]0.64molCr(NO_3)_3[/tex]
Explanation:
Hello there!
In this case, according to the given chemical equation, it turns out possible for us to realize there is a 4:3 mole ratio of chromium(III) nitrate to lead(IV) nitrate, and therefore, we can calculate the moles of the former by applying the shown below stoichiometry setup:
[tex]0.85molPb(NO_3)_4*\frac{3molCr(NO_3)_3}{4molPb(NO_3)_4} \\\\0.64molCr(NO_3)_3[/tex]
Regards!
What is the correct name for the chemical formula N408?
Answers
Answer:
molar mass (molar weight)
Explanation:
When temperature drops, (for example from 20 degrees celsius to 10 degrees celsius)
a.) energy increases
b.) particles move slower
c.) particles collide more often
d.) pressure increases
Answers
Phenolphthalein meaning
Answers
Answer:
Phenolphthalein is a chemical compound with the formula C20H14O4 and is often written as "HIn" or "phph" in shorthand notation. Phenolphthalein is often used as an indicator in acid–base titrations. For this application, it turns colorless in acidic solutions and pink in basic solutions.
Answer:
Phenolphthalein is a chemical compound, a colorless crystalline solid, though pink in a alkaline solution, and is also used as an acid-base indicator.
Explanation:
Balance this chemical equation
Ca(OH)2 + HCl ---> CaCl2 + H2O
Answers
Answer:
The balance equation of Ca(OH)2 + HCl ---> CaCl2 + H2O
is
Ca(OH)2(s) + 2HCl(aq) ---> CaCl2(aq) +2H2O (l) (balanced equation)
a cell was taken from dolly the sheep and used to make a geneticly identical copy of her the copy lived to be 6 years old what is that called?
Answers
Explanation:
dolly was cloned I guess
Organize the following list of elements from highest to lowest Ionization Energy:
Phosphorus, Bismuth, Arsenic, Antimony, Nitrogen
Answers
Answer: The list of elements from highest to lowest Ionization Energy is Nitrogen > Phosphorus > Arsenic > Antimony > Bismuth.
Explanation:
The amount of energy required to remove the most loosely bound electron from an isolated gaseous atom or ion is called ionization energy.
Element with a half-filled orbital requires much more energy to remove an electron. This is because element with a half-filled electronic configuration is the most stable in nature.
More stable or tightly electrons are bound to the nucleus of an atom more will be its ionization energy. This also means that smaller is the atom higher will be its ionization energy.
When we move from top to bottom in a group the size of atom increases and the attraction between nucleus of atom and its valence electrons decreases. Hence, less will be the ionization energy.
Therefore, ionization energy decreases on moving down a group.
So, the given elements Phosphorus, Bismuth, Arsenic, Antimony, Nitrogen are all group 15 elements. Hence, decreasing order of their ionization energy is as follows.
Nitrogen > Phosphorus > Arsenic > Antimony > Bismuth
Thus, we can conclude that the list of elements from highest to lowest Ionization Energy is Nitrogen > Phosphorus > Arsenic > Antimony > Bismuth.
How many significant figures are in the measurement 1.3000 meters
Answers
Answer:
5
Explanation:
mark me brainliest!
please mark all that apply!
Answers
Answer:
F G there you go the guy on top is right
Explanation:
F G
in order to balance the reaction, what number needs to go in front of F(2)?
Answers
Answer:
NA + F2 = NAF - Chemical Equation Balancer.
2 Na + F 2 → 2 NaF
Na is a reducing agent, F 2 is an oxidizing agent. ; Pale-yellow to greenish gas with a pungent, irritating odor.
Need help ASAP ( will give 50 points)
Select the correct answer. Which galaxies have light smoothly spread across the
galaxy? A. spiral galaxy B. irregular galaxy C. lenticular galaxy D. elliptical galaxy
Answers
Answer:
Your answer would be D, Hope this helps.
It took 20.0 mL of NaOH to neutralize 25 mL of 0.50 M HCl. What is the molarity of the base?
Answers
Answer:
5/8 M
Explanation:
NaOH + HCl ====> NaCl + H2O
in 25 mL of 0.5M acid, we have 1/80 Mol of HCl
it mean we must have 1/80 Mol of NaOH.
20 mL = 1/50 L
(1/80)Mol / (1/50)L = 5/8 M
A 400-gram sample of iron, initially at 21 0Cis heated to 65 0C. Determine the energy attained (in Joules) by the iron sample if the specific heat capacity of iron is 0.11 cal/g0C
Answers
Answer:
Q = 8100 J.
Explanation:
Hello there!
In this case, according to the given information, we can infer this is a question about calorimetry, and we can use the general heat equation to solve this one:
[tex]Q=mC(T_2-T_1)[/tex]
Thus, we plug in the given mass, specific heat and temperatures to obtain the energy involved in this heating process:
[tex]Q=400g*0.11\frac{cal}{g\°C} (65\°C-21\°C)\\\\Q=1936cal[/tex]
Which converted to Joules turns out to be:
[tex]Q=1936cal*\frac{4.184J}{1cal} \\\\Q=8100J[/tex]
Regards!
4. There are 1.9 moles of Oxygen gas at a pressure of 3.50 atm, and the temperature is 65°C. What is the
volume of the gas? Remember that R = 0.0821 L x atm/Kx mol AND that you must convert °C to K.
Fill in the variables chart:
Answers
Answer:
15.06 L
Explanation:
Using the ideal gas law equation:
PV = nRT
Where;
P = pressure (atm)
V = volume (L)
n = number of moles (mol)
R = gas law constant (0.0821 Latm/molK)
T = temperature (K)
According to the information provided in this question,
P = 3.50 atm
n = 1.9 moles
V = ?
T = 65°C = 65 + 273 = 338K
Using PV = nRT
V = nRT/P
V = (1.9 × 0.0821 × 338) ÷ (3.5)
V = 52.725 ÷ 3.5
V = 15.06 L
The movement of water from an area of high concentration to one of low concentration through a semipermeable membrane is called ?
Answers
What quantity of energy would be necessary to boil water with a mass of
123 g that is at 100.00°C ?
Answers
Answer:
i think 554 I think
Explanation:
maybe ..
based on the graph below, which statement
Answers
Answer:
4. Atmospheric pressure decreases as altitude increases.
Explanation:
hope this helps and is right. p.s i really need brainliest :)
10 points. Please help.
A balloon can hold 10 liters of a gas. If you blow up this balloon with 2 moles of oxygen gas at a pressure of 0.76 atmospheres, what is the temperature of the balloon? Pay attention to the unit of pressure used.
Answers
Answer:
The temperature of the balloon is 46.34 K.
Explanation:
An ideal gas is a theoretical gas that is considered to be composed of point particles that move randomly and do not interact with each other. Gases in general are ideal when they are at high temperatures and low pressures.
An ideal gas is characterized by three state variables: absolute pressure (P), volume (V), and absolute temperature (T). The relationship between them constitutes the ideal gas law, an equation that relates the three variables if the amount of substance, number of moles n, remains constant and where R is the molar constant of the gases:
P * V = n * R * T
In this case:
P= 0.76 atmV= 10 Ln= 2 molesR= 0.082 [tex]\frac{atm*L}{mol*K}[/tex]T= ?Replacing:
0.76 atm* 10 L= 2 moles* 0.082 [tex]\frac{atm*L}{mol*K}[/tex] *T
Solving:
[tex]T=\frac{0.76 atm* 10 L}{2 moles* 0.082\frac{atm*L}{mol*K}}[/tex]
T= 46.34 K
The temperature of the balloon is 46.34 K.
6 a 100 sample of Au - 198 Au 198 be? Decays to 3.125 g in 13.5 days, what would the half-life of au198 be?
Answers
Answer:
Half-life = 2.7 days
Explanation:
The radioactive decay of an isotope follows the equation:
Ln[A] = -kt + ln[A]₀
Where [A] could be taken as the amount of A after t time, k is decay constant, [A]₀ initial amount of A.
Replacing to solve k:
Ln[3.125g] = -k*13.5days + ln[100g]
-3.465736 = -k*13.5days
k = 0.2567days⁻¹
Half-life is:
half-life = ln2 / k
Half-life = 2.7 days
The total mass of reactants and products is _______ during a chemical reaction
Answers
Answer: The total mass of reactants and products is the same during a chemical reaction.
Explanation:
the total mass of reactants is equal to the total mass of products.
ANSWER THIS QUESTION FOR 29 POINTS
List several examples of what cells do all day?
I NEED HELP HELP ASAP
Answers
Answer:
Explanation:
cells process rna and trna
converting food into energy
the regrowth of cells that have died through out the day
the transcription of dna to rna
hope this helped :)