Answer:
[tex]tiempo=0.72s[/tex]
Explanation:
¡Hola!
En este caso, como podemos observar, la relación entre la rapidez de reaction, las moles y el tiempo de reacción es:
[tex]rapidez=\frac{mol}{tiempo}[/tex]
De este modo, despejamos el tiempo en esta ecuación para obtener:
[tex]tiempo=\frac{mol}{rapidez}[/tex]
Así, reemplazamos la rapidez y moles dadas para obtener:
[tex]tiempo=\frac{0.323mol}{0.450mol/s}\\\\tiempo=0.72s[/tex]
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PLEASEEEE HELP :')
''If 5.6 mole of calcium metal is reacted, how many grams of calcium phosphide will form?'
Answer:
340 grams Ca₃P₂ (2 sig. figs.)
Explanation:
3Ca + 2P => Ca₃P₂
5.6 mole + excess => ? grams
Convert the 'known' to a coefficient of 1 by dividing all coefficients by 3.
=> Ca + 2/3P => 1/3Ca₃P₂
From the above, 1 mole of Ca => 1/3 mole Ca₃P₂
∴ 5.6 mole Ca in an excess of P => 1/3(5.6 mole) Ca₃P₂
=> 1.8666 mol Ca₃P₂ (calculator answer) ≅ 1.9 mol Ca₃P₂
=> 1.9 mole x 182 g Ca₃P₂/mol Ca₃P₂ = 339.73333 grams Ca₃P₂
≅ 340 grams Ca₃P₂ (2 sig. figs.)
do we need nuclear energy to stop climate change?
Answer:
Hey mate......
Explanation:
This is ur answer.....
To combat climate change, the world must rapidly reduce its dependency on fossil fuels to reduce greenhouse gas emissions. Nuclear energy is low-carbon and can be deployed on a large scale in the time frame required, supplying the world with clean and affordable electricity.
Hope it helps!
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What mass of copper metal will be formed when excess magnesium metal is reacted with:
(a) 250.0 mL of a 1.0 M copper M chloride solution (b) 100.0 mL of a 0.25 M copper (II) chloride solution
Answer:
A
Explanation:
2Fe +3S= Fe2S3 how many grams of sulfur are involved in this reaction if 95 grams of iron are needed to react with sulfur
Answer:
83 g
Explanation:
Step 1: Write the balanced equation
2 Fe + 3 S ⇒ Fe₂S₃
Step 2: Calculate the moles corresponding to 95 g of Fe
The molar mass of Fe is 55.85 g/mol.
95 g × 1 mol/55.85 g = 1.7 mol
Step 3: Calculate the moles of S needed to react with 1.7 moles of Fe
The molar ratio of Fe to S is 2:3. The moles of S needed are 3/2 × 1.7 mol = 2.6 mol
Step 4: Calculate the mass corresponding to 2.6 moles of S
The molar mass of S is 32.07 g/mol.
2.6 mol × 32.07 g/mol = 83 g
calculate the atomic mass of gallium if gallium has two naturally occurring isotopes with the following massess and natural abundances Ga-69 68.9256 amu 60.11% Ga-71 70.9247 amu 39.89
Answer: Atomic mass of gallium = 69.72304093 amu
Explanation:
We calculate the atomic mass of Gallium by using the Relative abundance of the isotopes.
Atomic mass =mass x Natural Abundance of Isotope 1 +mass x Natural Abundance of Isotope 2
(60.11/100 x 68.9256) + (39.89/100 x 70.9247)
= 41.43117816 + 28.29186283 = 69.72304093 amu
Raising the temperature of reactants in a system Select one: a. increases the average kinetic energy of the molecules. be. decreases the average kinetic energy of the molecules. c. decreases the rate of collision of molecules. d. has no effect on the average kinetic energy of molecules. Clear my choice Check
Answer:
A, increases the average kinetic energy of the molecules
Explanation:
temperature is a measure of the average kinetic energy of particles (atoms, ions and molecules), if one raises the temperature, one is raising the average kinetic energy of the particles.
What mass of LiOH would need to be dissolved in water to make 300.0 mL of a solution with a pH of 11.33?
Execute Order 66________________
The mass of LiOH needed to make a 300 mL of a solution with a pH of 11.33 is 0.015 g
We'll begin by calculating the pOH of the solution.
pH = 11.33
pOH =?
pH + pOH = 14
11.33 + pOH = 14
Collect like terms
pOH = 14 – 11.33
pOH = 2.67 Next, we shall determine the concentration of hydroxide ion, OH⁻pOH = 2.67
Concentration of hydroxide ion [OH⁻] = ?pOH = –Log [OH⁻]
2.67 = –Log [OH⁻]
–2.67 = Log [OH⁻]
Take the as antilog of –2.67
[OH⁻] = antilog (–2.67)
[OH⁻] = 0.0021 MNext, we shall determine the concentration of LiOH.LiOH(aq) —> Li⁺(aq) + OH⁻(aq)
From the balanced equation above,
1 mole of LiOH contains 1 mole of OH⁻
Therefore,
0.0021 M LiOH will also contain 0.0021 M OH⁻.
Next, we shall determine the mole of LiOH in the solution.Molarity of LiOH = 0.0021 M
Volume = 300 mL = 300 / 1000 = 0.3 L
Mole of LiOH =?Mole = Molarity × volume
Mole of LiOH = 0.0021 × 0.3
Mole of LiOH = 0.00063 moleFinally, we shall determine the mass of LiOH needed to prepare the solution.Mole of LiOH = 0.00063 mole
Molar mass of LiOH = 7 + 16 + 1 = 24 g/mol
Mass of LiOH = ?Mass = mole × molar mass
Mass of LiOH = 0.00063 × 24
Mass of LiOH = 0.015 gTherefore, the mass of LiOH needed to prepare the solution is 0.015 g
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In 2-3 sentences, describe the basic properties of waves including frequency, amplitude, wavelength, and speed.
Answer:
frequency: This is the number of oscillations in one second or number of complete wavelengths produced in one second.Amplitude: This is the maximum displacement of a particle from its mean position.Wavelength: This is the distance between one crest and another or one trough and another.Speed: This is the distance a wave travels in a given amount of time.In the lab jill mixed 3 gases together. The resulting pressure was 930 mmHg carbon dioxide had a partial pressure of .70 atm and oxygen had a partial pressure of 680 mmHg. What is the partial pressure of nitrogen in kPa
Answer:
26.2kPa is the partial pressure of nitrogen
Explanation:
Assuming the partial pressure of Carbon dioxide is 0.070atm
The total pressure of a mixture of 3 gases (CO2, O2 and N2) is:
Total pressure = Partial pressure CO2 + Partial pressure O2 + Partial pressure N2
0.070atm CO2 are:
0.070atm * (760mmHg / 1atm) 53.2mmHg
Replacing:
930mmHg = 53.2mmHg + 680mmHg + Partial pressure N2
Partial Pressure N2 = 196.8mmHg
In kPa -101.325kPa = 760mmHg-
196.8mmHg * (101.325kPa / 760mmHg) =
26.2kPa is the partial pressure of nitrogenWhat is the role of the producer in any food chain?
Question 1 options:
Producers turn light energy into food energy
Producers make the food that consumers eat
Without producers, consumers would starve
All of these answers are correct
Answer:
All of these answers are correct.
Explanation:
They are all correct because producers make their food(energy) through photosynthesis, they provide food to herbivores and therefore the rest of the food chain, and without them, the food chain would collapse and all the consumers would starve.
What is a decay series?
a series of reactions that never ends
a different form of chemical bonding
a chain of decays that results in a stable nucleus
a series of chemical reactions that ends with a decay\
HELPPPPPP
Answer:
a chain of decays that result in a stable nucleus
Explanation:
Decay series is a series of decay in which radioactive element is decomposed in different elements until it produces one stable atom.
Answer:
C
Explanation:
took test Edg
1
50.0 grams of an unknown metal is heated to 100.0°C and then placed in a calorimeter with 250.0 mL of water. If the final temperature of the
metal is 29.1°C and the calorimeter absorbed 824 Joules of energy, what
is the specific heat of the unknown metal? *
A 50,000 g septic tank reading reports that methane gas bubbles are present with a concentration of 17 ppm
Answer:
[tex]m_{solute}=0.85g[/tex]
Explanation:
Hello there!
In this case, according to the given information for the parts per million of methane in this solution, it is possible for us to first write the equation for this unit of concentration as shown below:
[tex]ppm=\frac{m_{solute}}{m_{solvent}} *1x10^6[/tex]
In such a way, since the septic tank has a mass of 50,000 g, the mass of methane into it is calculated as shown below:
[tex]m_{solute}=\frac{ppm*m_{solvent}}{1x10^6}[/tex]
Now, we plug in the numbers to obtain:
[tex]m_{solute}=\frac{17*50000g}{1x10^6}\\\\m_{solute}=0.85g[/tex]
Regards!
Which is more likely to melt a cup of ice - a spoonful of boiling water, or a cup of room-temperature
Answer:
boiling water
Explanation:
its hotter
Write the electronic configuration of the following element or ion and circle on their valance electrons
A.27 Al =
13
B. 31p-3
15
please answer my question now ! I will give you a Brinalist
1s2,2s2,2p6
Explanation:
electron arrangements
Which is closer to the Sun—Neptune or the Earth?
O A.
The distance from the Earth to the Sun cannot be determined.
OB.
The Earth is closer to the Sun than Neptune is.
OC. They are the same distance from the Sun.
OD.
Neptune is closer to the Sun than the Earth is.
Answer: The earth is closer to the sun than neptune is
Explanation:
Answer:
The Earth is closer to the Sun than Neptune is.
Explanation:
pov
What are the two kinds of ways matter changes?
Two groups of students were given the same test. One group of students studied for 2 hours and the other group of students did not study at all. The group of students who studied achieved higher grades on the test. What is the DEPENDENT variable?
Answer:
Grade achieved is the dependent variable in the study.
Explanation:
A variable in any research or study is any property, characteristic, number, or a quantity which shows variability or change in its value i.e. it increases or decreases over time, depending on the treatment conditions.
There are two types of variables: Dependent variable and Independent variable.
An independent variable does not depent on any factor for its value or result, rather, a change units value brings about a change in the dependent variable.
A dependent variable is the variable which depends on some factor which the researcher controls. Any change made on the factor by the researcher would bring about a change on the dependent variable.
For example, in the given example above, studying habit affects academic performance. If a student studies more, his/her academic performance will improve as they will achieve higher grades. On the other hand, if a student fails to study, their academic performance will not show any improvement when compared to the group of students who studied. Thus, grade improvement depends on studying habit.
Therefore, grade obtained is the dependent variable in the study.
HELP ASAP
Explain the factors that affect the sounds we hear. Support your response with evidence and scientific reasoning including relationship between wave properties and sound characteristics you explored in this . In your response you should each of the following terms:
Loudness/Volume Pitch Frequency Amplitude
Answer:
The loudness of sound is determined, in turn, by the intensity, or amount of energy, in sound waves. The unit of intensity is the decibel (dB) Intensity of sound results from two factors: the amplitude of the sound waves and how far they have traveled from the source of the sound.
Explanation:
Two mice have different parents. They both have the same protein for whisker thickness in their cells.
Answer:
Due to presence of similar protein.
Explanation:
The two mice are different from one another due to their different parents so in that way the physical features of both mice are different from one another. Both mice have the same protein for whisker thickness in their cells that leads to same whisker in both mice. The common feature in both mice are the protein that is responsible for whisker thickness so both have same whisker on their face.
How many moles are in 25.0 grams of KMnO4?
0.124 mol KMnO4
0.158 mol KMnO4
0.199 mol KMnO4
0.316 mol KMnO4
Answer:
158 mol :)
Explanation:
4.A high-quality sleeping bag will keep you warm even during a winter camping trip high in the mountains. How do you stay warm when the air around you is very cold?
A. The sleeping bag produces thermal energy that keeps you warm.
B. The sleeping bag transfers thermal energy from the air to your body.
C. The sleeping bag slows the transfer of thermal energy produced by your body into the air.
D. The sleeping bag increases the production of thermal energy by your body
Answer:
I think it's C
Explanation:
Can I have brainliest? It would help me out, if not thanks anyways! Hope this helped and have a nice day!
Why is this conveyor important for Earth?
Answer:
.
Explanation:
Answer:
The great ocean conveyor plays a highly significant part in the climate of the planet. It transports heat to the Polar Regions, for example. In doing so, the amount of ice that can be formed in these regions is limited.
beta-plus decay sodium protons and neutrons
Answer:
(β-decay) is a type of radioactive decay in which a beta particle (fast energetic electron or positron) is emitted from an atomic nucleus, transforming the original nuclide to an isobar of that nuclide. For example, beta decay of a neutron transforms it into a proton by the emission of an electron accompanied by an antineutrino; or, conversely a proton is converted into a neutron by the emission of a positron with a neutrino in so-called positron emission.
Explanation:
Answer:
Beta decay occurs when, in a nucleus with too many protons or too many neutrons, one of the protons or neutrons is transformed into the other. ... In beta plus decay, a proton decays into a neutron, a positron, and a neutrino: p Æ n + e+ +n.
Explanation:
Chemical symbols stand for?
Answer Explanation:
If it is like H, or O or N or Na or Cl, those are the elements. Those are on the Periodic table. pH is the acidity and basicity of a substance, how acidic or basic(caustic) it is. mol is Moles. kPa is kilopascals. STP is standard temperature and pressure, at 0*C(Celsius), or 273.15 K(Kelvin), and 101,325 pascals, or 101.325 kilopascals.
Avagadro's Number is 6.022x10^23, the number of atoms in a mole. The Ideal Gas Law is P(Pressure in kPa) times V(Volume in L, liters) equals n(number of moles of gas) times R(the universal gas constant, or 8.3145 (L kPa/K mol) or 8.3145 liters kilopascals per Kelvin mole. that is just a few of them.
Balance the following chemical equation by providing the correct coefficients
Answer:
2FeBr₃ + 3Na₂S → 1Fe₂S₃ + 6NaBr
Explanation:
SOLUTION :-
Balance the equation by hit & trial method , and you'll get the answer :-
2FeBr₃ + 3Na₂S → 1Fe₂S₃ + 6NaBr
VERIFICATION :-
In the reactant side of the equation :-
Number of Fe atoms = 2×1 = 2Number of Br atoms = 2×3 = 6Number of Na atoms = 3×2 = 6Number of S atoms = 3×1 = 3In the product side of the equation :-
Number of Fe atoms = 1×2 = 2Number of S atoms = 1×3 = 3Number of Na atoms = 6×1 = 6Number of Br atoms = 6×1 = 6Number of atoms of all elements are same in both reactant & product side of the equation. Hence , the equation is balanced.
When you find the gram formula mass, the results should be in *
Help me out ;/
Answer: g/mol
Explanation:
The gram formula mass of CuSO 4 is 159.60 g/mol
Multiply the subscript for each element by its molar mass (atomic mass on periodic table in g/mol). Then add the results. This will give you the molar mass of the compound (mass of 1 mole).
Cu : ( 1 × 63.546 g/mol ) = 63.546 g/mol
S : ( 1 × 32.065 g/mol ) = 32.06 g/mol
O : ( 4× 15.999 g/mol ) = 63.996 g/mol
CuSO 4 : 63.546 g/mol + 32.06 g/mol + 63.996 g/mol = 159.60 g/mol (rounded to two decimal places)
Assertion: The Nitrogen atom loses its 3 valence electrons to form its ion
Reason: Nitrogen ion is an anion
(a) Both assertion (A) and Reason (R) are true, and reason (R) is the correct explanation of assertion (A).
(b) Both assertion (A) and Reason (R) are true, but reason (R) is not the correct explanation of assertion (A).
(c) Assertion (A) is true, but reason (R) is false.
(d) Assertion (A) is false, but reason (R) is true
SOMEBODY PLEASE HELP ME ASAP. WILL GIVE BRAINLIEST TO BEST ANSWER.
Answer:
135.80 g of Ag
Explanation:
[tex]40gCu *\frac{1mol Cu}{63.546g Cu} *\frac{2mol Ag}{1molCu} *\frac{107.868g Ag}{1mol Ag}[/tex]
~ 135.80 g of Ag
Define Acid and alkalis
Answer:
mark me brainliest
Explanation:
An acid is a substance that has a pH lower than 7. For example, hydrochloric acid, sulphuric acid, citric acid, ethanoic acid (vinegar). A base is a substance that neutralises an acid – those that dissolve in water are called alkalis. An alkali is a soluble substance with a pH higher than 7.
Answer:
The chemical which give hydrogen ion when dissolve in water is called acid.for example:HCL,HNO3,H2SO4 etc.
The bases that dissolve in water and produce hydroxyl ions are called alkalis.for example:NaOH,KOH etc.
Explanation: