Answer:
A battery
Explanation:
A battery is a device which converts chemical energy into electrical energy . Most batteries operate as chemical cells. It is the redox reactions taking place inside the battery that causes electric current to flow via the terminals of the battery to an external circuit.
There are two main types of batteries, viz;
Rechargeable batteries
Non rechargeable batteries
A rechargeable battery is recharged by passing electric current in the reverse direction through the battery; it can be used multiple times to produce electricity in order to power devices. An example of a rechargeable battery is the Lithium-ion battery used in laptops and cell phones.
A non rechargeable battery will give electricity until the chemicals present it are used up(the chemical reactions producing electrical energy attain equilibrium). An example of a non rechargeable battery is a dry cell.
Are two atoms of the same element identical?
Please answer this and I will mark the best answer as the brainiest answer.
Answer:
No
Explanation:
Are two atoms of the same element identical?
No they are not, for multiple reasons,
1) Heisenberg uncertainty principle: Electrons don't have a definite position, and direction of motion, at the same time. So we can only know of the two. Therefore the atoms are not identical in terms of the location or direction of motion at any fixed point in time.
2) Isotopes, while the number of protons in the nucleus determine the element, atoms of the same element can have different numbers of neutrons in their nuclei.
3) Electrons again, atoms can exist in energized states, therefore we may have a different number of electrons
describe a change caused by kenitic energy as well as a change that involves potential energy
I need help with number 6
(d) greenhouse effect
27. Which event will most likely occur in
rising air?
A. clearing skies
B. cloud formation
C. decreasing relative humidity
D. increasing temperature
Answer:
B. cloud formation
Explanation:
The event that will most likely occur is cloud formation. This is because Rising Air is the key process in the production of clouds and precipitation. This occurs because the air rises and as it rises it begins to expand, it expands so much so that the temperature of the air begins to decrease and humidity rises until cloud droplets begin forming as the excess water vapor condenses on the the air particles.
If I dilute 120 mL of a 1.3 M solution until the new concentration is 0.83 M, what is the new volume? Round to the nearest WHOLE NUMBER and DO NOT include units. *
1 point
Answer:
[tex]V_2=188mL[/tex]
Explanation:
Hello,
In this case, for dilution processes, the initial moles must be the same to the final moles, therefore, only the volumes and molarities change from the beginning to the end of the dilution:
[tex]M_1V_1=M_2V_2[/tex]
In this case, we are asked to compute the new or final volume, so we simply solve for it as shown below:
[tex]V_2=\frac{M_1V_1}{M_2}=\frac{120mL*1.3M}{0.83M}\\ \\V_2=188mL[/tex]
Best regards.
The two products that are formed when a solution of HNO3 and a solution of NaOH react are water and:
NaNO2.
NaNO3.
NaHNO.
NaHNO3.
Answer: NaNO3 (Sodium Trioxonitrate (V) )
Explanation:
The equation of the reaction is; HNO3 + NaOH -----> H2O + NaNO3
Answer: its B
Explanation:
What volume of 0.500 M HNO₃(aq) must completely react to neutralize 100.0 milliliters of 0.100 M KOH(aq)?
Answer:
v = 500 milliliters
Explanation:
[tex]HNO_{3}[/tex] ⇒ [tex]H^{+} + NO^{3-}[/tex]
[tex]KOH[/tex] ⇒ [tex]K^{+} + OH^{-}[/tex]
1 [tex]H^{+}[/tex] to 1 [tex]OH^{-}[/tex]
[tex]\frac{0,5}{V} = \frac{0,1}{100} \\\\v * 0,1 = 50\\v = 500 milliliters[/tex]
Si una masa dada de hidrógeno ocupa 40 litros a 700 grados torr. ¿Qué volumen ocupará a 1 atmósfera de presión? (dar la presión en atmósferas). Por favor :c
Answer:
[tex]V_2=36.84L[/tex]
Explanation:
Hola,
En este caso, podemos usar la ley de Boyle, la cual nos permite analizar el comportamiento volumen-presión en un gas ideal de manera inversamente propocional:
[tex]P_1V_1=P_2V_2[/tex]
Así, dado el volumen y la presión inicial, la cual se convierte a atmósferas (760 torr = 1atm), calculamos el volumen final a 1 atm como se muestra a continuación:
[tex]V_2=\frac{P_1V_1}{P_2}=\frac{700torr*\frac{1atm}{760torr}*40l }{1atm}\\ \\V_2=36.84L[/tex]
Saludos!
Answer:
[tex]V_2=~36.84~Litros[/tex]
Explanation:
En este caso tenemos diferentes valores de volumen y presión para un primer estado:
[tex]V_1=~40~Litros[/tex]
[tex]P_1=~700~torr[/tex]
Y tenemos valores de presión para un segundo estado:
[tex]V_2=~?[/tex]
[tex]P_2=~1~atm[/tex]
Necesitamos una relación entre volumen y presión para poder hallar nuestra incognita ( [tex]V_2[/tex]). Nuestra relación es la ley de Boyle:
[tex]P_1*V_1=P_2*V_2[/tex]
Ahora bien, tenemos una unidad diferente para el presión en [tex]P_2[/tex] (atm), debemos hacer una conversión. Esta conversión puede hacerse si sabemos que 1 atm = 760 torr por lo cual [tex]P_2=760~torr[/tex]
Ahora podemos reemplazar en la ecuación:
[tex]700~torr*40~Litros=760~torr*V_2[/tex]
[tex]V_2=\frac{700~torr*40~Litros}{760~torr}[/tex]
[tex]V_2=~36.84~Litros[/tex]
El volumen sera de 36.84 Litros
Espero que ayude!
8. What is the molecular mass of NH3?
the answer is 17.031 g/mol
Answer:
17.031 g/mol
Explanation:
hard to explanation
What is the mass of 2.13 moles of lithium arsenate
Under what conditions will deviations from the "ideal" gas be expected?
Answer:
Conditions which results in deviating a gas from "ideal" behavior are
1. Low Temperature
2. High Temperature
Explanation:
Ideal gas according to the kinetic model theory states that the conditions that apply are high temperatures where kinetic energy and low pressure is too high and the interactions in between and the container are negligible. Hence, the deviations of ideal gas falls when there is low temperature and high pressure.
How many atoms of oxygen are contained in 160 grams of N203?
Answer:
well person with a question it would be 356 an atom for eveyday of the year but every four years it would be 366 atoms
Explanation:
what is the half-life of the substance as determined by the graph?
Answer:
6.25
Explanation:
Because 2.5 is half and idk know how to explain but yeah
The yearly amounts of carbon emissions from cars in Belgium are normally distributed with a mean of 13.9 gigagrams per year and a standard deviation of 5.8 gigagrams per year. Find the probability that the amount of carbon emissions from cars in Belgium for a randomly selected year are between 11.5 gigagrams and 14.0 gigagrams per year. a. 0.340 b. 0.660 c. 0.167 d. 0.397
Answer:
The correct option is;
c. 0.167
Explanation:
The parameters given are;
The mean, μ = 13.9 Gigagrams/year
The standard deviation, σ = 5.8 Gigagrams/year
The z-score formula is given as follows;
[tex]z = \dfrac{x - \mu }{\sigma }[/tex]
Where:
x = Observed score = 11.5 Gigagrams/year
We have;
[tex]z = \dfrac{11.5 - 13.9 }{5.8 } = \dfrac{-2.4 }{5.8 } = 0.4138[/tex]
From the z-score table relations/computation, the probability (p-value) = 0.6605
Where:
x = Observed score = 14 Gigagrams/year
We have;
[tex]z = \dfrac{14- 13.9 }{5.8 } = \dfrac{0.1}{5.8 } = 0.01724[/tex]
From the z-score table relations/computation, the probability (p-value) = 0.4931
Therefore, the probability, [tex]p_{ca}[/tex], that the amount of carbon emissions from cars in Belgium for a randomly selected year are between 15.5 Gigagrams/year and 14 Gigagrams/year = The area under the normal curve bounded by the p-values for the two amounts of carbon emission
Which gives;
[tex]p_{ca}[/tex] = 0.6605 - 0.4931 = 0.1674 ≈ 0.167
Therefore, the correct option is c. 0.167.
why is the air along a coastline typically cooler than in other areas?
Answer:
ocean heats up and cools down relatively slowly. Therefore, areas near the ocean generally stay cooler
In a titration experiment, a 10.00 ml sample of H2SO4 was titrated with 33.25 mL of 0.777 M KOH.
Calculate (H2SO4).
Answer:
H2SO4 = 0.3885 mol L-1
Explanation:
We need (i) a stoichiometric equation:
H2SO4 + 2NaOH = NaSO4 +2H2O
1:2
And (ii) equivalent quantities of sodium hydroxide
Moles of NaOH = 10x [tex]10^{-3}[/tex]L x 0.777mol [tex]L^{-1}[/tex] = 0.00777 mol
So H2SO4 = (0.5 x 0.00777 mol) / 0.001
= 0.3885 mol L-1
Which of the following is NOT a true state-
ment about gases?
Answer:
Unsure there's not enough information to answer
Explanation:
Which of the following is NOT a true statement about gases?
how many liters of hydrogen gas is produced from 3.712 g of magnesium with 104.2ml of 1.385 mol/L HCL (aq) at SATP?
Please help me!! I need to figure this question out for a quiz.
Answer:
The correct answer is 1.61 L.
Explanation:
Based on the given information, 3.712 grams of Mg reacts with 104.2 ml of 1.385 mol per L HCl at SATP, there is a need to find the amount of hydrogen gas produced in liters.
The chemical reaction taking place in the given case is,
Mg + 2HCl = MgCl2 + H2
The reacting moles of each reactants is,
Moles of Mg = 3.712 g/24.305 g = 0.153 moles
Moles of HCl = 1.385 mol/L * 0.1042 L = 0.144 moles
From the reaction it is clear that Mg and HCl are present in 1:2 molar ratio. Therefore, 0.153 moles of Mg can completely react with 0.306 moles of HCl. However, the moles of HCl obtained in the given case is only 0.144 moles, thus, HCl is a limiting reactant.
Now the moles of hydrogen produced is,
n = 0.144 moles of HCl * (1 mole H2/2 mol HCl) = 0.072 moles
Finally to find the liters of hydrogen gas produced, the ideal gas equation is used, that is, PV = nRT
At STAP, the value of T is 273 K and pressure is 1 atm, the value of R is 0.082 atm.L/mol.L. Now putting the values we get,
PV = nRT
V = nRT/P
V = 0.072 mol * 0.082 atm.L/mol.L*273/ 1 atm
V = 1.61 L
Q2: A compound consists of 40.00 % C, 6.67 % H and
rest is oxygen by mass. If RMM of X is 180, find the
molecular formula.
Answer:
C6H12O6
Explanation:
Just use the table method like I did and compared the molecular mass with the mass of the empirical formula.
please at least answer one! Determine the formula mass of each of the substances below.
1. CaCl2
2. NH4OH
3. AgCH3COO
4. Ba3(PO4)2
5. Al2(CO3)3
6. Zn(NO3)2
Someone please help! I've been stuck on this for hours :(
Answer:
Explanation:
1. 40.08 + 35.45(2) = 110.98
2. 14.01 + 1.01(5) + 16.00 = 35.06
3. 107.87 + 12.01(2) + 1.01(3) + 16.00(2) = 165.91
4. 137.33(3) + 30.97(2) + 16.00(8) = 601.93
5. 26.98(2) + 16.00(9) + 12.01(3) = 216.06
6. 65.39 + 14.01(2) + 16.00(6) = 189.41
Check me if I'm wrong.
I AM GIVING BRAINLIEST! PLEASEEEEEE HELPPPPPP I NEED HELPPP
How many atoms of nitrogen in 2.0 mol of dinitrogen monoxide, N2O?
Answer:
I think that the answer is N20:2(14.01)+1(16.06)=44.02g/mol(c) fluorine Di nitrogen monoxide contains how many mom 6.022 x
1023 mol N20
Please help!!
How many moles of sodium carbonate (Na2CO3) are required to precipitate the calcium ion from 803.1 mL of a 0.35 M CaCl2 solution?
Answer:
[tex]n_{Na_2CO_3}=0.28molNa_2CO_3[/tex]
Explanation:
Hello,
In this case, the undergoing chemical reaction is:
[tex]Na_2CO_3(aq)+CaCl_2(aq)\rightarrow CaCO_3(aq)+2NaCl(aq)[/tex]
Hence, given the solution of calcium chloride, we can compute its reacting moles:
[tex]n_{CaCl_2}=0.35\frac{mol}{L}*803.1mL*\frac{1L}{1000mL}= 0.28molCaCl_2[/tex]
Thus, by knowing there is a 1:1 molar ratio between sodium carbonate and calcium chloride, we can easily compute the moles of sodium carbonate needed for a complete precipitation as shown below:
[tex]n_{Na_2CO_3}=0.28molCaCl_2*\frac{1molNa_2CO_3}{1molCaCl_2} \\\\n_{Na_2CO_3}=0.28molNa_2CO_3[/tex]
Best regards.
Which type of burn injury can convert to a deeper injury due to tissue hypoxia?
Answer:
Deep partial-thickness wounds
in a lab, 400 ML of hydrogen gas reacts with 400 ML of chlorine gas. what product would form and how much of the product would form?
PLEASE ANSWER ASAP
Answer:
The product is hydrogen chloride gas
Volume of product = 800 ml
Explanation:
Equation of the reaction;
H2 + Cl2 ----> 2HCl
From the above balanced chemical equation, 1 mole of hydrogen gas, H2 reacts with 1 mole of chlorine gas, Cl2 to produce 2 moles of hydrogen chloride gas, HCl.
The mole ratio of reactants and products is 1 : 1 ---> :2
According to Gay-Lussac's law of combining volume which states that the volume of gases which take part in a chemical reaction bear a simple whole number ratio to one another and to the volume of products, if gaseous, at constant temperature and pressure.
Therfore, if 400 ml each of hydrogen and chlorine gas react, the product will be 2 * 400 ml of Hydrogen chloride gas = 800ml of hydrogen chloride gas
What property of matter will keep your body in motion when the car comes to halt
Answer:
Inertia in our body tends to be in the situation it is. So, we a car comes to a halt, our body wants to keep moving i.e. in motion. hope that helps love!
As a result of nitrogen
atmosphere remain or less______
Answer: constant
Explanation:
Processes like nitrogen fixation, lightning, and the cycle results the nitrogen atmosphere to remain less constant
Photochemical smog consists of a) coal dust b)water droplets and soot c) ozone d) acid rain
Answer:
the answer is C Ozone
hope that helps
Blood rich in carbon dioxide was called venous blood, as it was believed that only the veins carried this type of blood. Based on what you know about the circulatory system, explain why this statement is incorrect.
Answer:
Yes is incorrect
Explanation:
not all veins carry blood rich in CO2 , the pulmonary vein carries blood with O2 which means that not all veins carry blood rich in CO2
What is
ground water?
Answer:
Water that is present beneath the Earth's surface
1. What Volume of HCl is generated if 3.44 g of Cl2 are reacted at STP? 2. What volume does 4.87 mol of Kr have at STP? 3. What pressure of HCl is generated if 3.44 g of Cl2 are reacted in 4.55 L at 455 K?
Answer:
1. 2.17 dm3 VOLUME OF HCl IS PRODUCED WHEN 3.44 g OF Cl2 REACT AT STP
2. 4.87 MOLE OF Kr AT STP CONTAINS 109.088 dm3 .
3. THE PRESSURE WHEN 3.44 g OF Cl2 are reacted at 4.55 L AT 455 K IS 0.77 atm
Explanation:
1 Volume of HCl if 3.44 g of Cl2 are reacted at STP?
Equation for the reaction:
H2 + Cl2 ---------> 2HCl
1 mole of Cl2 reacts to form 2 mole of HCl
At STP, 1 mole of a gas is equal to the molar mass of the gas sample
35.5 * 2 g of Cl2 reacts to form 2 mole of HCl
3.44 g of Cl2 will react to form ( 3.44 * 2 / 71 ) mole of HCl
= 0.0969 mole of HCl
1 mole of HCl = 22.4 dm3
0.0969 mole of HCl = ( 22.4 * 0.0969 / 1)
= 2.17056 dm3
The volume of HCl is 2.17 dm3 when 3.44 g of Cl2 are reacted at STP.
2. What volume does 4.87 mol of Kr have at STP?
1 mole of a substance is 22.4 dm3 of the sample
1 mole of Kr = 22.4 dm3
4.87 mole of Kr = 4.87 * 22.4
= 109.088 dm3
4.87 mole of Kr at STP contains 109.088 dm3 volume
3. Whta pressure of HCl is generated if 3.44 g of Cl2 are reacted at 4.55 L at 455 K
Using the formula:
PV = nRT
V = 4.55 L
R = 0.082 L atm/ mol K
T = 455 K
m = 3.44 g
n = mass / molar mass
molar mass = ( 1 + 35.5) = 36.5 g/mol
n = 3.44 g / 36.5 g/mol
n = 0.094 mole
P = nRT / V
P = 0.094 * 0.082 * 455 / 4.55
P = 3.50714 / 4.55
P = 0.7708 atm
The pressure of HCl if 3.44 g of Cl2 are reacted at 4.55 L and 455 K is 0.7708 atm.
1. The volume of HCl generated is 2.15 L
2. The volume of 4.87 moles of Kr is 109.088 L
3. The pressure of HCl generated is 0.788 atm
1. Determination of the volume of HCl generated
We'll begin by calculating the number of mole in 3.44 g of Cl₂Mass of Cl₂ = 3.44 g
Molar mass of Cl₂ = 2 × 35.5 = 71 g/mol
Mole of Cl₂ =?Mole = mass / molar mass
Mole of Cl₂ = 3.44 / 71
Mole of Cl₂ = 0.048 mole Next, we shall determine the mole of HCl produced.H₂ + Cl₂ —> 2HCl
From the balanced equation above,
1 mole of Cl₂ reacted to produce 2 moles of HCl.
Therefore,
0.048 mole of Cl₂ will react to produce = 0.048 × 2 = 0.096 mole of HCl
Finally, we shall determine the volume of HCl generated at STP.At standard temperature and pressure (STP),
1 mole of HCl = 22.4 L
Therefore,
0.096 mole of HCl = 0.096 × 22.4 = 2.15 L
Thus, the volume of HCl generated at STP is 2.15 L
2. Determination of the volume of 4 moles of Kr at STP
At standard temperature and pressure (STP),
1 mole of Kr = 22.4 L
Therefore,
4.87 moles of Kr = 4.87 × 22.4 = 109.088 L
Thus, 4.87 moles of Kr has a volume of 109.088 L at STP
3. Determination of the pressure of HCl generated.
Number of mole (n) of HCl obtained = 0.096 mole
Volume (V) = 4.55 L
Temperature (T) = 455 K
Gas constant (R) = 0.0821 atm.L/Kmol
Pressure (P) =?
PV = nRT
P × 4.55 = 0.096 × 0.0821 × 455
P × 4.55 = 3.586128
Divide both side by 4.55
P = 3.586128 / 4.55
P = 0.788 atmThus, the of HCl generated is 0.788 atm
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