The given reaction Mg + O₂ → MgO is a type of Synthesis reaction. Hence option (1) is correct.
What is Synthesis reaction ?Synthesis reactions are reactions that occur when two different atoms or molecules interact to form one molecule or compound.
It is also known as combination reaction
In the given reaction Mg and O combines with each other to form one product i.e, MgO. Hence, The given reaction Mg + O₂ → MgO is a type of Synthesis reaction. Thus, option (1) is correct.
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I need the answer asap
Answer:
The energy will be added
Explanation:
I need the answer asap
Answer:
Explanation:
i ned help
What does viscosity describe
According to the phase diagram for H₂O, what happens to the phases of
water at 0°C as the pressure is increased from 0 atm to 10 atm?
Answer:
"A", "water changes from a gas to a solid to a liquid", according to this phase diagram, at at 0°C, as pressure is increased from 0atm to 10atm.
Explanation:
The question asks what happens at 0°C, as pressure is increased from 0atm to 10atm.
According to the question, the temperature is held constant. The pressure changes. In the phase diagram, we find the temperature 0°C on the horizontal axis, and all points where the temperature are 0°C are along that vertical line.
Since the pressure starts at 0atm and increases to 10atm, we start at the bottom, and move upward along that line, to see what phases of matter the substance changes to.
At the bottom, it is initially in a "gas" phase. As it moves up, it transitions to a "solid" phase. Later, as it continues moving up, it changes again into a "liquid" phase.
Thus, the answer would be "A", "water changes from a gas to a solid to a liquid", according to this phase diagram, at at 0°C, as pressure is increased from 0atm to 10atm.
A switch controls the current in a circuit that has a large inductance. The electric arc at the switch (Fig. CQ32.3) can melt and oxidize the contact surfaces, resulting in high resistivity of the contacts and eventual destruction of the switch. Is a spark more likely to be produced at the switch when the switch is being closed, when it is being opened, or does it not matter
When the circuit is opened, a spark is much more possible.
What is an inductor?The primary purpose of an inductor is the storage of energy. This is why an inductor helps to eliminate a spark in a circuit.
In the circuit as described in the question, we know that there is no current when the circuit is closed, the current across the inductor remains constant but rapidly decreases at the opening of the circuit this could lead to a spark.
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Which group of the periodic table consists of elements that share similar
properties and have 2 electrons in their outer shells?
A. 1
B. 14
C. 13
D. 2
The alkaline earth metals are also referred to as Group 2A. elements are comparable to one another in terms of their electron configurations and thus, their properties.
Alkaline-earth metals:From beryllium (Be) through radium, the alkaline-earth metals comprise Group 2 of the periodic table (Ra). The alkaline earth metals are so reactive because each of these elements has two electrons in its lowest energy level that they are rarely encountered alone in nature. However, they don't react as quickly as alkali metals do. Compared to the alkali metals, their chemical reactions normally proceed more slowly and generate less heat.
Elements and their electronic configuration are listed below:-Be :- [He]2S2
Mg:-[Ne]3S2
Ca :-[Ar]4S2
Sr:-[Kr]5S2
Ba:-[Xe]6S2
Ra:-[Rn]7S2
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Group 2A is another name for the alkaline earth metals, which are similar to one another in terms of their electron configurations and thus, their properties.
Alkaline Earth MetalsGroup 2 of the periodic table is made up of alkaline-earth metals, starting with beryllium (Be) and ending with radium (Ra). The fact that each of these elements possesses two electrons at its lowest energy level makes the alkaline earth metals extremely reactive, which is why they are rarely found by themselves in nature. They don't respond as quickly, though, as alkali metals do. Their chemical reactions often take longer and produce less heat than those of the alkali metals.
Following is a list of elements along with their electronic configuration:-Be:- [He]2S2
Mg:-[Ne]3S2
Ca:-[Ar]4S2
Sr:-[Kr]5S2
Ba:-[Xe]6S2
Ra:-[Rn]7S2
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4.0 mol Na2S reacts with 5.0 mol
CuSO4 according to the equation below:
Na₂S + CuSO4 → Na₂SO4 + CuS
How many moles of Na2SO4 form from 5.0 moles of CuSO4?
[?] mol Na₂SO4
Round your answer to the tenths place.
The number of moles of [tex]Na_2SO_4[/tex] form from 5.0 moles [tex]Na_2S[/tex] is 5 moles.
What is a limiting reactant?Limiting reactants are those reactants that are completely used up in a chemical reaction.
4.0 mol [tex]Na_2S[/tex] will be completely used since the combining ratio is 1 : 1 : 1.
[tex]Na_2S + CuSO_4[/tex] ->[tex]Na_2SO_4 + CuS[/tex]
From the chemical equation above, 5.0 moles [tex]Na_2S[/tex] will yield 5 moles of [tex]Na_2SO_4[/tex].
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3 Cu + 8HNO3 g 3 Cu(NO3)2 + 2 NO + 4 H2O
In the above equation how many moles of NO can be made when 97.00 moles of HNO3 are consumed?
24.25 moles of NO can be produced using 97 moles of HNO3.
What is balanced chemical equation?Equal numbers of atoms from various elements are present in both the reactants and the products in balanced chemical equations. Varied elements' atom counts in the reactants and products of unbalanced chemical equations are different.
3 Cu + 8HNO3 g → 3 Cu(NO3)2 + 2 NO + 4 H2O
The number of moles consumed can be calculated using comparing with coefficients in the balanced reaction .
So , from above eq we get that 8 moles of HNO3 are consumed to make 2 moles of NO.
⇒ 8 HNO3⇔2 NO
⇒ 1 HNO3⇔ 1/4 NO
This means that for each mole of HNO3 produces 1/4 moles of NO.
So , for 97 moles of HNO3 , [tex]\frac{1}{4} *97[/tex] moles of NO can be made,
So, total moles of NO made are 24.25 moles.
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24.25 moles of NO would be made when 97 moles of [tex]HNO_{3}[/tex] are consumed
Given reaction:
[tex]3 Cu + 8HNO_{3} - > 3 Cu(NO_{3})_{2} + 2 NO + 4 H_{2}O[/tex]
As the given reaction is already balanced so we don't need to balance it
In a balanced chemical reaction the ratio of reactants consumed and products formed always remains constant.
∵ In the given Reaction we can analyse for 8 moles [tex]HNO_{3}[/tex] consumed 2 moles of [tex]NO[/tex] are being produced.
Assuming [tex]x[/tex] moles of [tex]NO[/tex] being produced when [tex]97[/tex] moles [tex]HNO_{3[/tex] produced
∵ Ratio remains constant
⇒[tex]\frac{HNO_{3} Consumed}{NO Produced} = \frac{8}{2} =\frac{97}{x}[/tex]
⇒[tex]x=\frac{97}{4}=24.25[/tex] moles
∴ 24.25 moles of [tex]NO[/tex] would be made.
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When water vapor cools, it condenses.
Which number represents this process on the hydrologic cycle
diagram?
O 1
02
O 3
04
Number 2 represents this process on the hydrologic cycle diagram. Therefore, the correct option is option B.
What is hydrologic cycle?One of the most significant natural processes is the hydrologic cycle, which we may often take for granted. This process causes the water in the entire earth to change forms, locations, or accessibility.
Water transitions between three distinct forms during this cycle, to put it simply. It can be found in many states of liquid, gas, or solid, including ice, steam, and water. Water will frequently transition between these three states throughout the cycle: freezing into ice, melting into water, evaporating becoming water vapor, but finally condensing back into water. Number 2 represents this process on the hydrologic cycle diagram.
Therefore, the correct option is option B.
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How many molecules are contained in 1.55 moles of methane, CH 4 ?
Avogadro's law states that in one mole of a substance, there are [tex]6.022 \times 10^{23}[/tex] molecules.
This means that in 1.55 moles, there are [tex]1.55(6.022 \times 10^{23})=\boxed{9.33 \times 10^{23} \text{( to 3 sf)}}[/tex]
What volume of a 3.95 M
potassium chloride solution would
be needed to make 325 mL of a
2.76 M solution by dilution?
[?] mL of 3.95 M KCl
8.0 mol AgNO3 reacts with 5.0 mol Zn in
a single replacement reaction.
2AgNO3 + Zn → 2Ag + Zn(NO3)2
How many moles of Ag form from 8.0
mol AgNO3?
[?] mol Ag
Round your answer to the tenths place.
Taking into account the reaction stoichiometry, 8 moles of Ag can be produced from 8 moles of AgNO₃ and 5 moles of Zn.
Reaction stoichiometryIn first place, the balanced reaction is:
2 AgNO₃ + Zn → 2 Ag + Zn(NO₃)₂
By reaction stoichiometry (that is, the relationship between the amount of reagents and products in a chemical reaction), the following amounts of moles of each compound participate in the reaction:
AgNO₃: 2 moles Zn: 1 mole Ag: 2 moles Zn(NO₃)₂: 1 moleLimiting reagentThe limiting reagent is one that is consumed first in its entirety, determining the amount of product in the reaction. When the limiting reagent is finished, the chemical reaction will stop.
Limiting reagent in this caseTo determine the limiting reagent, it is possible to use a simple rule of three as follows: if by stoichiometry 1 mole of Zn reacts with 2 moles of AgNO₃, 5 moles of Zn reacts with how many moles of AgNO₃?
[tex]amount of moles of AgNO_{3}= \frac{5 moles of Znx2 moles of AgNO_{3}}{1 mole of Zn}[/tex]
amount of moles of AgNO₃= 10 moles
But 10 moles of AgNO₃ are not available, 8 moles are available. Since you have less moles than you need to react with 5 moles of Zn, AgNO₃ will be the limiting reagent.
Moles of Ag formedConsidering the limiting reagent, the following rule of three can be applied: if by reaction stoichiometry 2 moles of AgNO₃ form 2 moles of Ag, 8 moles of AgNO₃ form how many moles of Ag?
[tex]amount of moles of Ag=\frac{8 moles of AgNO_{3}x2 moles of Ag }{2 moles of AgNO_{3}}[/tex]
amount of moles of Ag= 8 moles
Then, 8 moles of Ag can be produced from 8 moles of AgNO₃ and 5 moles of Zn.
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this question in the screenshot
Mass of hydrate + crucible = 47.29 g
Mass of anhydrous salt = 2.7 g
Molar mass of anhydrous salt CuSO4 = 159.5 g
Given,
mass of empty crucible = 42.45 g
mass of hydrate salt= 4.84 g
mass of crucible after first heating = 46.1 g
mass of crucible after second heating= 45.153 g
mass of crucible after third heating= 45.15 g
so, as per the question we need to find...
Mass of hydrate + crucible = ? g
Mass of anhydrous salt = ? g
Molar mass of anhydrous salt CuSO4 = ? g
∴Mass of hydrate + crucible = 42.45 + 4.48 = 47.29 g
The given salt is in hydrate form, to remove water from this molecule we need to perform heating .
So we are taking the substance into the crucible as it is in less quantity.
Here, we performed heating 3 times and note the weight after every heating.
After this, assume that the water is totally evaporated and the remaining salt is in anhydrous form,
∴ Mass of anhydrous salt = 45.15 - 42.45 = 2.7 g
To find the molar mass of anhydrous salt of CuSO4,
atomic weight of Cu = 63.5 g
atomic weight of S = 32 g
atomic weight of O =16 g
∴ molar mass of anhydrous salt of CuSO4 = 63.5 + 32 + (16 ×3)
=159.5 gm
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When a scientific theory has been tested and proved by the scientific community, it becomes a law.
True
False
Answer:
False
Explanation:
Because laws and theories are developed for different purposes, laws never become theories, and theories do not become laws.
Newton law of motion
Answer:
newtons law states that every body in the universe attracts every other body with a force which is directly proportional to the product of their masses and inversely proportional to square of the distance between their centers
Answer:
an object at rest tends to stay at rest
What is the volume in L of a 0.825 mole sample of Ar at 600 mm Hg and 300 K?
Answer:
V = 25.7 L
Explanation:
To find the volume of Argon (Ar), you need to use the Ideal Gas Law equation. This looks like:
PV = nRT
In this formula,
> P = pressure (atm)
> V = volume (L)
> n = number of moles
> R = constant (0.0821 L*atm/K*mol)
> T = temperature (K)
While there is a different constant that can be used if you want to keep the pressure in mmHg, there is a more common constant used when the pressure is in atm. So, to find the volume, you need to (1) convert mmHg to atm (by dividing by 760) and then (2) calculate the volume (using Ideal Gas Law).
(Step 1)
600 mm Hg 1 atm
------------------- x --------------------- = 0.789 atm
760 mm Hg
(Step 2)
PV = nRT
(0.789 atm) x V = (0.825 mole)(0.0821 L*atm/K*mol)(300 K)
(0.789 atm) x V = 20.32
V = 25.7 L
What is the si unit if sound
Explanation:
The SI Unit of sound is decibel.
or we can say that
The SI Unit of sound is watt per square metre (i.e.w/m2).
what is the molecular formula of Ferric Oxide with criss-cross method
Answer: Fe2O3
Explanation: By applying crisscross method, the formula will be Fe2O3.
There are two common oxides of copper; one is 80% copper and the other is 89% copper by weight. Calculate the formula and name each compound.
Cupric oxide (CuO) and cuprous oxide (Cu2O) are the names of two oxides of copper.
Why both Cupric oxide (CuO) and cuprous oxide differ from one another?Both Cupric oxide (CuO) and cuprous oxide are different from one another because of the presence of number of copper atom. In one compound, copper is bonded with oxygen in 1:1 form whereas in the other compound, the copper is bonded with 2:1 form.
So we can conclude that Cupric oxide (CuO) and cuprous oxide (Cu2O) are the names of two oxides of copper.
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What mass of H2 forms when
35.25 g Al reacts with excess
hydrochloric acid?
2AI + 6HCI →→2AICI 3 + 3H₂
Based on the mass ratio, the mass of H₂ produced is 3.51 g of H₂
What is the mass ratio of a reaction?The mass ratio of a reaction is the ratio of the masses of the reactants as well as as products in a balanced equation of a reaction.
The equation of the reaction is given below;
2 AI + 6 HCI → 2 AICI₃ + 3 H₂
From the reaction equation, 2 * 27 g of Al produces 3 * 2 g of H₂
32.25 g of Al will produce: 6/55 * 32.25 g of H₂
Therefore, mass of H₂ produced is 3.51 g of H₂
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Answer:
From the reaction equation, 2 * 27 g of Al produces 3 * 2 g of H₂
32.25 g of Al will produce: 6/55 * 32.25 g of H₂
Therefore, mass of H₂ produced is 3.51 g of H₂
Explanation:
Which compound contains only nonpolar covalent bonds?.
Answer:
02 or oxygen if im not mistaken
Which of the following processes does not facilitate containment?
OA. Enrichment of uranium-235 is done.
B. Steel-reinforced concrete several feet thick surrounds the plant.
C. Workers wear protective clothing.
D. The water used to cool the fuel rods is enclosed.
SUBMIT
Enrichment of uranium-235 is done. Hence, option A is correct.
What is the meaning of containment?The act, process, or means of keeping something within limits the containment of health costs.
Enrichment is a process of increasing the proportion of fissile isotope found in uranium ore (represented by the symbol 'U') to make it usable as nuclear fuel or the compressed, explosive core of nuclear weapons.
Hence, option A is correct.
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How many milliliters of a 0.8 solution of citric acid would be needed to react with 15 g of baking soda? Show your work.
225 milliliters of a 0.8 solution of citric acid would be needed to react with 15 g of baking soda.
How to calculate volume?The volume of a substance can be calculated using the following formula:
molarity = no of moles ÷ volume
no of moles of baking soda (NaHCO3) = mass ÷ molar mass
Molar mass of baking soda = 84.007g/mol
no of moles = 15g ÷ 84.007g/mol = 0.18mol
0.8 = 0.18/volume
volume = 0.23L equivalent to 225mL
Therefore, 225 milliliters of a 0.8 solution of citric acid would be needed to react with 15 g of baking soda.
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225 millilitres of a 0.8 solution of citric acid would be needed to react with 15 g of baking soda.
Define molarity of a solution.Molarity (M) is the amount of a substance in a certain volume of solution. Molarity is defined as the moles of a solute per litres of a solution. Molarity is also known as the molar concentration of a solution.
[tex]Molality = \frac{Moles \;solute}{Volume of solution in litre}[/tex]
[tex]Moles of baking soda (NaHCO_3) =\frac{mass}{molar \;mass}[/tex]
Molar mass of baking soda = 84.007g/mol
[tex]Moles of baking soda (NaHCO_3) =\frac{15g}{84.007g/mol}[/tex]
[tex]Moles of baking soda (NaHCO_3) = 0.18mol[/tex]
Now, calculating volume with the molarity formula:
Molality = [tex]\frac{Moles \;solute}{Volume \;of \;solution \;in \;litre}[/tex]
0.8 = [tex]\frac{0.18 }{Volume \;of \;solution \;in \;litre}[/tex]
Volume = 0.23L equivalent to 225mL
Therefore, 225 milliliters of a 0.8 solution of citric acid would be needed to react with 15 g of baking soda.
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An aqueous solution of 4 mol/L nitric acid is electrolysis in an electrolytic cell using graphite electrodes.
Name the gas given off at the anode
The gas given off at the cathode is hydrogen while the gas given off at the anode is oxygen.
What is electrolysis?The term electrolysis has to do with the decomposition of a substance by the passage of a direct current through it.
The ions present in the system are[tex]H^+[/tex], [tex]OH^-[/tex] and [tex]NO_3^-[/tex] ions. The gas given off at the cathode is hydrogen while the gas given off at the anode is oxygen.
The half-reaction equation of the reduction is;
[tex]2H^+(aq) + e[/tex] → [tex]H_2(g)[/tex]
The oxidation half-reaction equation is;
[tex]4OH^- (aq)[/tex] → [tex]2H_2O(l) + 4e[/tex]
The overall equation is;
[tex]4H^+(aq) + 4OH^- (aq)[/tex] → [tex]4H_2(g) + 2H_2O(l) + 4e[/tex]
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You are trying to determine how
many moles of lithium nitrate are in
256 mL of a 0.855 M solution.
How many liters is 256 mL?
Answer:
0,218 moles
Explanation:
I will first explain how many liters is 256ml, that is 0,256 l.
because the m stands for milli which is a factor of 1000 -> (256 ml / 1000 = 0,256 l)
To calculate the amount of moles you multiply the volume with the concentration. So 0,256l x 0,855M = 0,218 moles.
Answer: 0.256
Explanation:
What is the volume of a
0.40 M Nal solution that contains
0.20 moles Nal in it?
Answer:
500ml or 0.5l
Explanation:
The concentration is 0.40 M so there are 0.40 moles in 1 l of the solution.
0.40 moles -> 1 l
but we have to go to 0.20 moles, 0.40/2 = 0.20 moles but we have to divide the volume also by 2 that makes 0.5 liters.
Answer: 0.5
Explanation:
The concentration is 0.40 M so there are 0.40 moles in 1 l of the solution.
0.40 moles -> 1 l
but we have to go to 0.20 moles, 0.40/2 = 0.20 moles but we have to divide the volume also by 2 that makes 0.5 liters.
How many calories are absorbed
when water absorbs 6.55 kJ of
energy?
[?] cal
The number of calories which are absorbed when water absorbs 6.55 KJ of energy is 1565.49 calories
How do I determine the number of calories absorbed?To know the number of calories which are absorbed when water absorbs 6.55 KJ of energy, we shall begin by converting 6.55 KJ to joules (J). Details below:
Energy (in KJ) = 6.55 KJEnergy (in J) =?1 KJ = 1000 J
Therefore,
6.55 KJ = (6.55 KJ × 1000 J) / 1 KJ
6.55 KJ = 6550 J
Finally, we shall convert 6550 J to calories. This is illustrated below:
Energy (in J) = 6550 JEnergy (in calories) =?4.184 J = 1 calorie
Therefore,
6550 J = (6550 J × 1 calorie) / 4.184 J
6550 J = 1565.49 calories
Thus, from the above calculations, we can conclude that the number of calories absorbed is 1565.49 calories
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What is the equilibrium expression for:
fe3o4(s) + 4h2(g) <=> 3fe(s) + 4h2o(g)
kc =
a)[fe]3 [h2o]4 / [fe3o4] [h2]4
b)[fe3o4] [h2]4 / [fe]3 [h2o]4
c)[h2o]4 / [h2]4
d)[fe] [h2o] / [fe3o4] [h2]
Answer:
c
Explanation:
in kc we only consider gases and aquas not solids and liquids
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which pair of compounds has the same empirical formula? (5 points)
select one:
a. c3h8 and c3h
b. c2h2 and c2h
c. c4h10 and c6h
d. c4h10 and c2h5
Answer:
D. C₄H₁₀ and C₂H₅
What is a empirical formula?
A chemical formula indicating the elements of a compound and their relative proportions, as (CH₂O)n.
Since an empirical formula indicates the ratio (proportions) of the elements in the compound, it can be used, along with the molar weight of the compound, to determine the molecular formula.
The empirical formula provides the smallest whole-number ratio among elements or compounds within a molecular compound. A compound is a chemical formed from atoms of different chemical elements.
Hence, Option D is correct.
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