Answer:CuO
Explanation:
The limiting reagent is the reactant which usually determines when the reaction will stop. The limiting reagent depends on the mole ratio, not on the masses of the reactants present. Here the limiting reactant is .The correct option is B.
The reactant which is entirely used up in a reaction is defined as the limiting reagent. The exact quantity of the reactant which is needed to react with another element can be obtained from the reaction stoichiometry.
Here the masses are converted into moles as:
Moles of CO = 40 / 28 = 1.42
Moles of CuO = 90 / 80 = 1.12
Divide the moles obtained with the coefficients to find the limiting reagent. The smaller number is the limiting reagent.
So CuO is the limiting reagent.
Thus the correct option is B.
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What pairs will form IONIC bonds?
Choices are :
A.) Na and F
B.) Mg and Ge
C.) C and O
D.) N and N
What did ancient people think of lunar eclipses
Explanation:
What happened to the ruler when you suddenly released it
What is the role of a consumer in the flow of energy through a food chain?
Answer:
The role of consumers in an ecosystem is to obtain energy by feeding on other organisms and sometimes transfer energy to other consumers. Changes that affect consumers can impact other organisms within the ecosystem.
Explanation:
Hope this helped Mark BRAINLIEST!!!!
Consumers are organisms that obtain energy by eating other organisms. Consumers may consume either producers or other consumers. Consumers include animals.
What is food chain ?A food chain is a network of links in a food web that begins with producer organisms and ends with an apex predator, detritivore, or decomposer species.
A food chain also demonstrates how organisms are related to one another through the food they consume. Each trophic level is represented by a different level of a food chain.
Producers can produce their own food and energy, but consumers are not the same. Consumers are living things that must hunt, gather, and eat their food.
Thus, Consumers must eat in order to gain energy, or they will perish. Omnivores, carnivores, herbivores, and decomposers are the four types of consumers.
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Which characteristic is not common to outer planets? Question 3 options: They support rung systems They have no solid surface They have multiple moons They are small
Answer:
They have no solid surface.
Explanation:
Many outer planets are actually known as gas giants and don't contain much of a solid surface. hope this helped!
Which of the following lists describes characteristics of an acid?
Answer: Acids have a sour taste. Lemons, vinegar, and sour candies all contain acids. Acids change the color of certain acid-base indicators. Two common indicators are litmus and phenolphthalein. This are som Characteristics of acid.
Answer:
Sour tasteCorrosive (burn your skin and break down other materials)Increase the concentration of H+ when added to waterDissolve metalsDonate a hydrogen ionlow pHExplanation:
these are the characteristics of an acid.
hope this helps!
PLEASE HELP I AM BEGGING YOU!!!!!!!!
Determine how much energy is needed to change 50 g of liquid water at 100°C to steam.
13,000J
113,000J
-113,000J
-130J
Answer:
[tex]Q=113,000J[/tex]
Explanation:
Hello there!
In this case, since the vaporization process is carried out in order to turn a liquid into a gas due to the addition of heat, we can use the following heat equation involving the heat of vaporization of water or any other substance:
[tex]Q=m*\Delta _{vap}H[/tex]
Thus, since this heat of vaporization for water is 2259.36 J/g, we plug in this amount to obtain the total energy for this process.
[tex]Q=50*2259.36 J/g\\\\Q=113,000J[/tex]
Which is positive due to the necessity of heat.
Regards!
help please, How much water would you need to add to the 10 grams of sodium hydroxide to make 100 grams of the 10% solution?
Answer:
90
Explanation:
gshhhshussussussjsuushhshjssuss
You will be marked as brainlest if you are able to solve this question
Answer:
See Explanation
Explanation:
1) According to the question, the reactivity of a metal is measured by the temperature of the solution after reaction. The higher the temperature of the solution, the greater the reactivity of the metal. Based on this criterion, the metals can be arranged in an order of reactivity as follows;
Mg> Zn > Fe.
2) The equation of the reaction is;
Mg(s) + 2H^+(aq) ------>Mg^2+(aq) + H2(g)
If we consider the changes in oxidation number from left to right;
The oxidation number of Mg changed from zero to +2
The oxidation number of H changed from +1 to zero
Recall that a redox reaction is a reaction in which the oxidation number of species changes from left to right in the reaction. Hence this reaction is a redox reaction.
The reducing agent experiences an increase in oxidation number. In this case, Mg is the reducing agent.
The oxidation half equation is;
Mg(s) ------> Mg^2+(aq) + 2e
The reduction half equation is;
2H^+(aq) + 2e ------> H2(g)
PLEASE help — I’m failing!
Determine each of the following for a 4.23 x 10-3 M solution of HCl:
a. H3o+
b. OH-
c. pH
d. pOH
Answer:
a.
[tex][H _{3}O {}^{ + } ] = 4.23 \times {10}^{ - 3} M[/tex]
b.
[tex][OH {}^{ - } ] = \frac{kw}{[H {}^{ + } ]} \\ [OH {}^{ - } ] = \frac{1 \times {10}^{ - 14} }{4.23 \times {10}^{ - 3} } \\ [OH {}^{ - } ] = 2.36 \times {10}^{ - 12} M[/tex]
c.
[tex]pH = - log[H {}^{ + } ] \\ pH = - log(4.23 \times {10}^{ - 3} ) \\ pH = 2.37[/tex]
d.
[tex]pOH = - log[OH {}^{ - } ] \\ = - log(2.36 \times {10}^{ - 12} ) \\ = 11.63[/tex]
If a gas is 0.8L at 900 mm Hg and 400K, what is the new pressure if the volume decreases to 0.5L and 300K?
Answer:
The new pressure of the gas is 1080 mmHg
Explanation:
The general equation provides a way to calculate the relationship between changesnp in volume, temperature and pressure of a given mass of gas.
The general gas equation is given as P1V1/T1 = P2V2/T2
Where P1 is initial pressure of gas
V1 is initial volume of gas
T1 is initial temperature of gas
P2 is final pressure of gas
V2 is final volume of gas
T2 is final temperature of gas
From the given question, P1 = 900 mmHg, V1 = 0.8 L, T1 = 400 K, P2 = ?, V2 = 0.5 L, T2 = 300 K
Making P2 subject of the general gas equations:
P2 = P1V1T2/V2T1
P2 = (900 × 0.8 × 300) / (0.5 × 400)
P2 = 1080 mmHg
Therefore, the new pressure of the gas is 1080 mmHg.
A wood-burning stove is used to heat the air in a small room.
What types of heat transfer are involved?
First the burning wood inside the wood stove gives off radiation heat and transfers it into the air inside the wood stove. This hot air then heats up the metal that the wood stove is made of; the metal is heated through conduction heat transfer.
The heat of the burning wood spread in the small room via radiation and convection.
What is convection?Convection can be described as the transfer of heat from one place to another due to the movement of fluid. Convective heat transfer involves the combined processes of conduction and advection.
Gases and liquids are not good conductors of heat under normal temperature and pressure conditions, but they can easily transfer heat.
The convection takes place other through diffusion or advection but does not take place in solids, because there is no movement of its constituent particles happens. The diffusion of heat that occurs in solids is known as thermal conduction.
Heat transfer that takes place between a surface and a liquid that is in contact with the surface is known as convection heat transfer. Therefore, the heat of the wood-burning stove spread in the entire room through radiation and convection.
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Balancing Equations help (please explain)
Answer:
A balanced equation is an equation for a chemical reaction in which the number of atoms for each element in the reaction and the total charge is the same for both the reactants and the products. In other words, the mass and the charge are balanced on both sides of the reaction.
Explanation:
What is displacement?
Answer: the moving of something from its place or position:
Explanation: hopes this helpe D:
Answer:
its a reaction where an atom or a set of atoms gets displaced get taken over by another atom
Explanation:
Which statements correctly describe the process of nuclear fusion? It happens only to large atoms. It occurs naturally in the Sun. It releases a large amount of energy. It bonds atoms together to create molecules. It involves the joining of two atomic nuclei.
Answer:
-It occurs naturally in the Sun.
-It released a large amount of energy.
-It involves the joining of two atomic nuclei.
It occurs naturally in the Sun.
It released a large amount of energy.
It involves the joining of two atomic nuclei.
Hence, options B, C and D are correct.
What is nuclear fusion?Nuclear fusion involves the fusion of 2 smaller nuclei into bigger nuclei.
Nuclear fission and nuclear fusion are nuclear reactions that produce energy in the form of heat. Fission is the process of the division of heavy, unstable nuclei into two nuclei, and in fusion two nuclei combine, resulting in the release of energy.
It occurs naturally in the Sun -The proton-proton fusion is the source of energy from the Sun. The energy from the sun occurs inside the core of the Sun.
It released a large amount of energy - Fission and fusion are two physical processes and produce large amounts of energy from atoms.
It involves the joining of two atomic nuclei - Nuclear fusion happens in the Sun and other stars when two atomic nuclei make one larger one.
Hence, options B, C and D are correct.
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3. How many molecules are in 2.10 moles of H2O?
Answer:
1.264 × 10²⁴ moleculesExplanation:
The number of molecules can be found by using the formula
N = n × L
where n is the number of moles
N is the number of entities
L is the Avogadro's constant which is
6.02 × 10²³ entities
From the question we have
N = 2.10 × 6.02 × 10²³
We have the final answer as
1.264 × 10²⁴ moleculesHope this helps you
what is the k expression for this reaction? plz help !
Answer:
K = [HI]² / [H₂] [I₂]
Explanation:
To write the expression of equilibrium constant, K, it is important that we know how to obtain the equilibrium constant.
The equilibrium constant, K for a given reaction is simply defined as the ratio of the concentration of the products raised to their coefficient to the concentration of the reactants raised to their coefficient. Thus, the equilibrium constant is written as follow:
K = [Product] / [Reactant]
Now, we shall determine the equilibrium constant for the reaction given in the question above. This can be obtained as illustrated below:
H₂(g) + I₂(g) —> 2HI (g)
K = [HI]² / [H₂] [I₂]
correct name for Ti(SO4)2?
Answer:
Titanium(IV) Sulfide
Explanation:
Anyone know this question
what if the solubility of KNO3 at 60 celsius?
A. 28 grams of KNO3
B. 38 grams of KNO3
C. 45 grams of KNO3
D. 108 grams of KNO3
Answer:
D. 108 grams of KNO3(Potassium nitrate)
What is the pOH of
a
2.6 x 10-6 M H+ solution?
Answer:
pH = -log 2.6 x 10-6 M
pH = 5.585
pOH= 14 - 5.585 = 8.415
8.4 as 2 sig figs
Which of the following is not a covalent compound?
NH3
PbSO4
C6H12O6
OCl2
Answer:
PbSO4 is not a covalent compound.
Explanation:
PbSO4 is an ionic compound.
A box is pushed at a constant speed of 1.5 m/s for 12 seconds using a force of 50 Newtons across the floor. Calculate the distance the box travelled using. *
Answer:
Distance = 18 meters
Explanation:
Given the following data;
Force = 50 N
Speed = 1.5 m/s
Time = 12 seconds
To find the distance travelled;
Speed can be defined as distance covered per unit time. Speed is a scalar quantity and as such it has magnitude but no direction.
Mathematically, speed is given by the equation;
[tex]Speed = \frac{distance}{time}[/tex]
Making distance the subject of formula, we have;
Distance = speed * time
Substituting into the formula, we have;
Distance = 1.5 * 12
Distance = 18 meters
Additionally, to find the workdone;
Workdone = force * distance
Workdone = 50 * 18
Workdone = 900 Joules
PLEASE HELP ASAP!!
WHAT IS THE CYCLE OF OZONE IN THE STRATOSPHERE?
A. UV splits an oxygen molecule into two oxygen atoms, which combine with a oxygen molecule to create ozone.
B. An ozone molecule splits into an oxygen molecule and an oxygen atom.
C. An ozone molecule forms from and then splits into two oxygen molecules and two oxygen atoms.
D. A & B
List 3 characteristics of mechanical waves.
Answer:
transverse, longitudinal, and surface waves.
Explanation:
there you go
The student then takes a 1.00M stock solution of table sugar (sucrose C12H22O11) and mixes 0.305L of stock solution with additional distilled water to create a dilute solution with a total volume of 1.25L.
Explain how the student can determine the molarity of the resulting solution. Show a valid calculation for the final molarity. PLS HELP
Answer: The molarity of final solution is 0.244 M.
Explanation:
Given: [tex]M_{1}[/tex] = 1.00 M, [tex]V_{1}[/tex] = 0.305 L
[tex]M_{2}[/tex] = ?, [tex]V_{2}[/tex] = 1.25 L
Formula used to calculate the molarity f resulting solution is as follows.
[tex]M_{1}V_{1} = M_{2}V_{2}[/tex]
Substitute the values into above formula as follows.
[tex]M_{1}V_{1} = M_{2}V_{2}\\1.00 M \times 0.305 L = M_{2} \times 1.25 L\\M_{2} = \frac{1.00 M \times 0.305 L}{1.25 L}\\= 0.244 M[/tex]
Thus, we can conclude that the molarity of final solution is 0.244 M.
Question is in picture! Due in 30 minutes!
Answer:
wheresthepicture.-
Explanation:
Answer:
don't see a picture
Explanation:
Examine the model of the Sun as the Earth rotates on its axis. Which statements correctly describe the impacts of the Earth's rotation with regards to sunlight? Select ALL that apply.
A)The polar regions will experience less direct sunlight from the Sun.
B)The seasonality of the Earth will be impacted by the planet's rotation
C)Some area of the Earth will experience day while others experience night.
D)Some areas of the Earth will experience longer periods of night than others.
E)All areas of the Earth will have twelve hours of light followed by twelve hours of dark.
Answer:
E)All areas of the Earth will have twelve hours of light followed by twelve hours of dark.
Explanation:
Sana maka tulong
Answer:
E
Explanation:
guy above said so
What are the two groups the animal kingdom is divided into?
Answer:
Taking the animal kingdom as an example, we can see that it is split into two clear groups: Invertebrates - animals without a backbone. Vertebrates - animals with a backbone.
Explanation:
Which property would most likely be the same when comparing two random samples of copper?
A mass
O B. volume
OC weight
OD. density
Answer:
melting point and conductivity
Explanation:
as long as both samples are copper, it will melt at the same time, aswell as conduct electricity the same.