Answer:
72.71 %
Explanation:
CO2. % C = 12.01/44.01 = 0.2729= 27.29% (we will divide 0.2729 with 100 to take the percentage). % O = 32.00/44.01 =0.7271 =72.71 %O in CO2.
can we stir silver nitrate solution with copper spoon? why or why not? support your answer with reason.
↪ Hello miss "galaxyu035" here's your answer for the question you wrote.
Answer :
No, we cannot stir silver nitrate solution with a copper spoon because , copper is more reactive than silver. Thus,it would displace silver from the silver nitrate solution forming copper nitrate.
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How many liters of hydrogen are required to react completely with 2.4L of oxygen to form water? 2H2 + O2 --> 2H2O
Answer:
2.4 mole of oxygen will react with 2.4 moles of hydrogen
Explanation:
As we know
1 liter = 1000 grams
2H2 + O2 --> 2H2O
Weight of H2 molecule = 2.016 g/mol
Weight of water = 18.01 gram /l
2 mole of oxygen react with 2 mole of H2
2.4 mole of oxygen will react with 2.4 moles of hydrogen
What type of reaction is illustrated?
2FeBr3 + 3Na2S → Fe2S3 + 6NaBr
A. synthesis
B. decomposition
C. double replacement
Answer:
Double replacement is the answer
How does water pressure relate to depth?
Do metals that react vigorously with acids also react vigorously with oxygen and water?
Answer: Sodium is the metal reacts vigorously with oxygen and water.
Explanation:
sodium
1 Atoms of the same element with different numbers of neutrons are defined as:
o
neutrons
O
isotopes
O
elements
O
compounds
Answer:
The answer is B Isotopes
The volume occupied by 12.5 moles of nitrogen gas at STP is liters.
Answer:
280 Liters
Explanation:
1 mole is equal to 22.4 L at STP, so you can use the equation:
12.5 moles * 22.4 L
to find out how many liters.
The volume occupied by 12.5 moles of nitrogen gas at STP is 280 Liters.
The given parameters;
number of moles of the gas, n = 12.5 molesI mole of gas at stp = 22.4 LThe volume of occupied by the nitrogen gas at stp is calculated by comparing the given number of moles to 1 moles of at standard condition (stp), as shown below;
1 moles of gas --------------- 22.4 L
12.5 moles of gas ------------ ?
= 12.5 x 22.4
= 280 L.
Thus, the volume occupied by 12.5 moles of nitrogen gas at STP is 280 Liters.
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Think about exothermic reactions. Think about endothermic reactions. Compare and contrast the two. Give examples from the readings in your comparison. Also give examples from what you may already know
Answer:
any combustion reaction.
a neutralization reaction.
rusting of iron (rust steel wool with vinegar)
the thermite reaction.
reaction between water and calcium chloride.
reaction between sodium sulfite and bleach (dilute sodium hypochlorite)
reaction between potassium permanganate and glycerol.
Explanation:
What has a complete ionic equation of Mg(s) + Zn2+ + 2NO3 → Mg2+ + 2NO3 + Zn(s)?
O A. Mg(s) + Zn2+ → Mg2+ + Zn(s)
O B. Mg(s) + Zn(NO3)2(aq) + Mg(NO3)2(aq) + Zn(s)
O C. Mg(NO3)2 + Zn(s) → Zn2+ + 2NO3 + Mg(s) O D. Mg(s) + 2Zn(NO3)(aq) + 2MgNO3(aq) + Zn(s)
Answer: [tex]Mg(s)+Zn(NO_3)_2(aq)\rightarrow Mg(NO_3)_2(aq)+Zn(s)[/tex]
Explanation:
Complete ionic equation : In complete ionic equation, all the substance that are strong electrolyte and present in an aqueous are represented in the form of ions.
Net ionic equation : In the net ionic equations, we do not not include the spectator ions in the equations.
Spectator ions are the ions present on reactant and product side which do not participate in a reactions. The same ions present on both the sides.
The equation given is:
[tex]Mg(s)+Zn^{2+}+2NO_3^-\rightarrow Mg^{2+}+2NO_3^-+Zn(s)[/tex]
The complete molecular equation will be:
[tex]Mg(s)+Zn(NO_3)_2(aq)\rightarrow Mg(NO_3)_2(aq)+Zn(s)[/tex]
The complete ionic equation of[tex]\rm Mg(s) + Zn^{2+} + 2NO_3 \rightarrow Mg^{2+} + 2NO_3 + Zn(s)[/tex] is[tex]\rm Mg(s) + Zn^{2+} \rightarrow Mg^{2+} + Zn(s)[/tex]. So, option A is right.
A complete ionic equation shows all of the ions that are present in a reaction, including the spectator ions. In this reaction, magnesium metal (Mg(s)) reacts with zinc(II) ions ([tex]\rm Zn^2+[/tex]) to form magnesium(II) ions ([tex]\rm Mg2+[/tex]) and zinc metal (Zn(s)).
The balanced molecular equation for this reaction is:
[tex]\rm Mg(s) + Zn(NO_3)_2(aq) \rightarrow Mg(NO_3)_2(aq) + Zn(s)[/tex]
The complete ionic equation is:
[tex]\rm Mg(s) + Zn^{2+}(aq) \rightarrow Mg^{2+}(aq) + Zn(s)[/tex]
The spectator ions are the nitrate ions ([tex]\rm NO_3^-[/tex]), which are present on both sides of the equation. They do not participate in the reaction, so they are not included in the complete ionic equation.
The other choices are incorrect because they do not show all of the ions that are present in the reaction.
Therefore, the answer is A. [tex]\rm Mg(s) + Zn^{2+} \rightarrow Mg^{2+} + Zn(s)[/tex].
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Can someone help me with this I will guve brainliest
How do submarine volcanoes affect autotrophic bacteria?
Answer:A large number of autotrophic bacteria—bacteria that produce their own food—live near hydrothermal vents and submarine volcanoes.
These bacteria are considered chemosynthetic, meaning they produce food from chemical reactions usually involving carbon dioxide, oxygen, or hydrogen
If a radioactive source has a half life of 2 hours how long will it take for the activity to go from 200 to 25?
Answer:
It takes 6h to the radioactive source decrease its activity from 200 to 25
Explanation:
The equation that describes the readioactive decay is:
Ln [A] = -kt + Ln [A]₀
Where [A] could be taken as activity of the source after time t, [A]₀ is initial activity and k is decay constant.
Decay constant could be written as:
k = ln2 / Half-life
k = ln 2 / 2h
k = 0.3466h⁻¹
Replacing in decay equation:
Ln [25] = -0.3466h⁻¹t + Ln [200]
-2.0794 = -0.3466h⁻¹t
6h = t
It takes 6h to the radioactive source decrease its activity from 200 to 25
Based on the table above, which amount of a compound dissolved in 100 grams of water at the stated temperature represents a system at equilibrium?
Select one:
a. 40 g NaCl at 70 degrees Celsius
b. 20 g KClO3 at 70 degrees Celsius
c. 80 g NaNO3at 10 degrees Celsius
d. 80 g Pb(NO3)2 at 30 degrees Celsius
Answer:
C. 80g Nano3 at 10 degrees Celsius
Explanation:
I just took the test
80 g NaNO₃ at 10 degrees Celsius of a compound dissolved in 100 grams of water at the stated temperature represents a system at equilibrium. Therefore, option C is correct.
What is solubility ?The maximum quantity of a chemical that will dissolve in a given amount of solvent at a particular temperature is referred to as its solubility.
Different compounds have very varying solubilities, which is a feature of a particular solute-solvent pair.
A substance's physical and chemical characteristics affect how soluble it is. A few other factors and circumstances can also influence it. A few of these are: temperature, pressure, kind of binding, and forces between the particles.
A system is said to be in equilibrium when 80 grammes of a substance, dissolved in 100 grams of water at 10 degrees Celsius.
Thus, option C is correct.
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used to carry the whole part
SCIENCE !!
This type of heat transfer can be seen on hot days when you see the heat waves shimmer off the pavement.
A. Heat Transfer
B. Radiation
C. Conduction
D. Convection
PLEASE HELP
The type of heat transfer you are referring to here is convection.
what would ebony do in water
Explanation:
It should be seen that perhaps the intensity of Ebony timber is greater than the concentration. This can drown if this is heavier than water, but that will floating whether it is not viscous than air.
Imagine that one tree outside your home looks unhealthy, although all the other trees seem healthy and strong. Describe how you could apply scientific thinking to the situation to determine why only one tree looks unhealthy. Write your answer down bellow Did you: include an asking question based on your observation about trees? Include details about what kind of data you would collect answer you question? Include a plan about how you would use the data collected to answer you question? Order the steps of your scientific investigation in a logical in order Question from Calvert Learning
Answer:
Hypothesis---experiments----results----conclusion.
Explanation:
First we make a hypothesis means a statement about why the tree looks unhealthy. In this segment of scientific method we have to test the hypothesis through experimentation. After that we have to take the readings of various parts of the tree and analyze the data to find out the problem. In the next step, we have to made the results on the basis of the data that is obtained. In the last we have to write the conclusion of the analysis and see the hypothesis.
Can someone help me please
only wave A you have given ....wave B ?
Consider this reaction:
H2(g) + Cl2 (g) 2 HCl (g)
How many liters of HCl are produced when 11.2 L of chlorine are reacted with excess hydrogen?
(One mole of any gas occupies 22.4L under certain conditions of temperature and pressure. Assume those conditions for this
question.)
22.4L
56 L
112 L
224 L
what are 3 pairs of atoms that will react?
Answer:
Phosphorus Trichloride, water and carbon dioxide
What are two properties that make a metal a good choice to use a wire in electronics? *
Answer:
Explanation:
The two properties that make a metal a good choice to use a wire in electronics are :
ductility conductivityPlants cannot grow too close together because their Blank______ need to spread out and absorb nutrients from the soil.
their roots need room to spread out
Which type of plate boundary is associated with seafloor spreading at the source of the spread: convergent, divergent, or transform?
Answer:
The answer is divergent
All objects in space obey the law of ________.
Answer:
physics, including the laws of gravity
Explanation:
Iron filling's were mixed together with salt crystal's What unique property of iron would be BEST to separate the fillings from the salt
Answer:
Magnetic property
Explanation:
Iron filling is a magnetic compound, unlike the salt crystals. This means they are attracted by magnets.
To separate a mixture of iron filling s and salt crystals, a magnet should be used to remove the iron fillings from the mixture.
What happens during the treatment step in refining crude oil for energy use?
A. Chemicals are added to the oil so that it burns more cleanly.
B. Different fractions are combined to make a variety of final products.
C. Heavy fractions are chemically “cracked" into lighter ones.
D. Crude oil is cleaned with a water mixture.
Answer:
I think its B im not sure lol but I would wait for someone that actually would know for sure
Different fractions are combined to make a variety of final products during the treatment step in refining crude oil for energy use. Therefore, the correct option is option B.
What is refining?A material or a form is purified by the process of refining, which is also maybe referred to by the mathematical word affixing. The phrase is typically used to describe a resource that is practically useable but is more valuable in its purest form.
The phrase refers to a wide range of changes, including more extreme ones as the conversion of ore to metal (for more information, see Refining (metallurgy)). Different fractions are combined to make a variety of final products during the treatment step in refining crude oil for energy use.
Therefore, the correct option is option B.
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PLEASE HELP!!!! ILL GIVE BRAINLIEST HELP ASAP
PLZ HELP THIS IS DUE TODAY AND ILL GIVE BRAINLIEST
Answer:
particle size
Explanation:
because except that all are the examples that the speed of dissolving can be changed
Answer:
Adding water
Explanation:
When a solid is dissolving the speed cannot be changed by adding water
someone please help... ill give you a heart a five star rating and the brainliest answer
please help me i’m struggling
Answeeeeer:
A. cell
Explanation:
Since A is the smallest in the chart, that would correspond to the cell because thats the smallest out of Tissue, Organ and Organism.