Answer:
2.5 mol is the answer
Explanation:
hope it will help you..
9 moles of O2
Balanced equation: 2KClO3 --> 2KCl + 3O2given:
6.0-mol of KClO3
using molar ratio:
2KClO3 : 3O2
2 : 3
moles of O₂ = ( 6/2 ) * 3 = 9 moles
How many molecules make up 32 g of Oz?
Answer:
Chemical formula of Oxygen is O2.
We know ,
1 mole of a substance contains 6.022×10^23, Avogadro’s Constat.
Here, Molar mass of O = 16u
And molar mass of O2 = 32u
And 32g of O2 = 1 mole of O2
It means that,
32g of O2 = 6.022×10^23 molecules
Answer:
The correct answer is given in the picture
This ANSWER IS ONLY CORRECT WHEN Oz STAND FOR OZONE
What are some consequences of solar flares in the ocean?
Answer:
they include pretty aurora as well as hazards
use shorthand method to represent the electrochemical reaction in a lead storage battery.
The shorthand equation shows us in a glance what happens in the electrochemical reaction. For a lead storage battery, we have; PbSO4(s)/H2O//Pb (s) ,PbO2(s) /H2SO4
What is an electrochemical reaction?An electrochemical reaction is one in which electrical energy is produced from a chemical reaction. The equations in a lead storage battery are;
Anode: Pb (s) + HSO4- → PbSO4(s) + H+ + 2 e-
Cathode: PbO2(s) + HSO4- + 3 H+ + 2 e- → PbSO4(s) + 2 H2O
Overall: Pb (s) + PbO2(s) + 2 HSO4- + 2 H+ → 2 PbSO4(s) + 2 H2O
Hence, the shorthand notation of this reaction is;
PbSO4(s)/H2O//Pb (s) ,PbO2(s) /H2SO4
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What is this element?
Answer:
stuff around the earth
Explanation:
like water,fire,wind,and earth/plants
Water is a ______ molecule and the bond between the h-o is a __ ______ bond.
i know the last 2 is polar covalent bond but i don't know
the first blank.
Answer: polar molocule
Explanation:
A balloon has a volume of 22.4 L at 273 K and 760 mm Hg. What will be the new volume if the pressure is
doubled to 2.00 atm?
The new volume of the gas in the balloon when the pressure is doubled is determined as 11.2 L.
General gas equation
The new volume of the balloon is determined by applying general gas equation as shown below
P₁V₁/T₁ = P₂V₂/T₂
Where;
P₁ is the initial pressure of the gas = 760 mmHg = 1 atmV₁ is the initial volume of the gas = 22.4 LT₁ is the initial temperature of the gas = 273 KP₂ is the final pressure of the gas = 2 atmT₂ is the final temperature of the gas = 273 KV₂ is the final volume of the gas = ?[tex]\frac{P_1V_1}{T_1} = \frac{P_2V_2}{T_2} \\\\V_2 = \frac{P_1V_1T_2}{T_1P_2} \\\\V_2 = \frac{1 \times 22.4 \times 273}{273 \times 2} \\\\V_2 = 11.2 \ L[/tex]
Thus, the new volume of the gas in the balloon when the pressure is doubled is determined as 11.2 L.
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Use the drop-down menus to complete each statement. is used as construction materials. is important for the production of crops. is the loss of fertile soil.
Bedrock is used in the construction of structures, the topsoil is important for the production of crops and the loss of fertile soil is known as desertification.
Bedrocks, topsoil, and desertificationBedrocks are underlining rocks below soils. They are useful in construction works such as buildings, bridges, etc.Topsoils are the topmost portions of soils. They are usually rich in humus and organic matter and are therefore very good for agricultural crop production.Desertification is simply the loss of fertile soils and their transformation to barren, unproductive lands. Topsoils are lost and soils are rendered unsuitable for agriculture.More on desertification can be found here: https://brainly.com/question/24255548
Answer:
1. Bedrock
2. Topsoil
3. Desertification
Explanation:
What are the factors that affect freezing-point depression
Why is the addition of cold distilled water to the container holding the aspirin you are trying to isolate a necessary step and why should this step be carried out carefully?.
Answer:
The aspirin is more soluble in ethanol than water - the water helps the crystals separate from solution.
Explanation:
Hope this helps!
what mass of sulfurous acid is produced when 245g of sulfur dioxide is reacted with water?
H₂O + SO₃ = H₂SO₃
The mass of sulfurous acid produced when 245g of sulfur dioxide is reacted with water is 313.8 g
StoichiometryFrom the question, we are to determine the mass of sulfurous acid produced
First, we will write the balaced chemical equation for the reaction
H₂O + SO₂ → H₂SO₃
This means 1 mole of H₂O reacts with 1 mole of sulfur dioxide (SO₂) to produce 1 mole of sulfurous acid (H₂SO₃)
Now, we will determine the number of moles of sulfur dioxide present
Mass of sulfur dioxide present = 245 g
Molar mass of sulfur dioxide = 64.066 g/mol
Using the formula,
[tex]Number \ of \ moles = \frac{Mass}{Molar\ mass}[/tex]
Then,
Number of moles of SO₂ present = [tex]\frac{245}{64.066}[/tex]
Number of moles of SO₂ present = 3.824 moles
This is the number of moles of SO₂ present
From balanced chemical equation
1 mole of H₂O reacts with 1 mole of sulfur dioxide (SO₂) to produce 1 mole of sulfurous acid (H₂SO₃)
Then,
Water (H₂O) will react with the 3.824 moles of sulfur dioxide (SO₂) to produce 3.824 moles of sulfurous acid (H₂SO₃)
∴ The number of moles of sulfurous acid produced is 3.824 moles
Now, for the mass of sulfurous acid produced
Molar mass of sulfurous acid = 82.07 g/mole
Using the formula,
Mass = Number of moles × Molar mass
Mass of sulfurous acid produced = 3.824 × 82.07
Mass of sulfurous acid produced = 313.8 g
Hence, the mass of sulfurous acid produced is 313.8 g
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Helppp
1.
You should NEVER dump the following into a drain at home:
I. Medication
II. Corrosives
III. Juice
Answer:
Medication
Explanation:
These pharmaceuticals can pollute our water and unintentionally expose us to the chemicals in these medications. Recent studies have found that medicines flushed down the drain can contaminate our lakes and streams, which can hurt fish and other aquatic wildlife, and end up in our drinking water.
How many atoms are in a 250 g sample of Gold
Answer:
15.055 X 1023 atoms
Explanation:
hope clear
Lithium nitride has a high melting point, 813*C. Nitrogen trifluoride has a low malting point, -207*C.
Explain why the melting points are different? [2 marks]
.....................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................
Answer:
Lithium has high melting and boiling point due to its small size, due to which it possesses high ionisation energy. As a result the binding energy in its crystal lattice is very high. This is why lithium has high melting and boiling point.
Explanation:
I HOPE IT HELPS! THANX!!
STAY SAFE!!!
A person observes that when the front porch of a house is wet , it is very slippery. The person adds sand to a paint can and repaints the porch’s surface.
How will the new paint make the porch safer?
Answer:
a
Explanation:
it will help stop frictoin
You are pulling an object up 1 m with a 5 m ramp. You pull
with 20 N of force.
How much does the object weigh?
For an object 1 m long with a 5 m ramp, You pull with 20 N of force, The weight of the object is mathematically given as
W= 5714.3 N
What is the weight of the object ?Generally, the equation for the weight is mathematically given as
W = mg = F/Sinθ
W= 20/Sin0.2
W=20/ 0.0035
W= 5714.3 N
In conclusion, the weight of the object
W= 5714.3 N
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From the table of available reagents select the one(s) you would use to convert cyclohexanone to the following compound:
A reagent is a compound that is used for the detection of the absence or presence of another substance.
What are reagents?Your information is incomplete as the available reagents aren't given. Therefore, an overview will be given.
Reagents are the integral part of a chemical reaction as they facilitate a reaction. A reagent is usually used tests.
Some typical examples of reagents include Tollens reagent, Fehling's reagent, Million's reagent, etc.
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The reagents that would be used to convert cyclohexanone to the following compound: hydrogen cyanide, potassium cyanide, and H₃O⁺, heat.
What is cyclohexanone?It is an organic compound with a chemical formula [tex]\rm (CH_2)_5 CO[/tex].
The cyclohexanone is used as Insecticides, paint and varnish remover, synthetic resins, etc.
It is not harmful to humans and animals, inhalation cause irritation.
Thus, the compound: hydrogen cyanide, potassium cyanide, and H₃O⁺, heat.
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Eas: add two curved arrows to show how water acts as a base
How to tell if a reaction is double bond or single
Answer:
Single replacement is a reaction in which one element reacts with another compund to form another compound and another element.
planation:
If the reaction is double displacement then two molecules will be displaced and if it is single displacement reaction then only one element displaces.
What is displacement reaction?Displacement reactions are those reactions in which any element of the given reactant will be displaced by any another element.
If only one element from the reactant molecules will displace then it will be known as single displacement reaction. If two elements or atoms will be displaced from the reactant molecules then it will be known as double displacement reaction.
Hence if one element displaceed then called the single displacement reaction and if two elements displaces then called as the double displacement reaction.
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Salt is often added to water to raise the boiling point to heat food more quickly. if you add 30.0g of salt to 3.75kg of water, what will be the change in the boiling point of your salt water? what is the new boiling temperature? assume the kf of water is 0.512*c/m. i know the answer is 100.14 degrees i just need to know the work and how to get there, thank you!
Assuming an ebullioscopic constant of 0.512 °C/m for the water, If you add 30.0g of salt to 3.75kg of water, the boiling-point elevation will be 0.140 °C and the boiling-point of the solution will be 100.14 °C.
What is the boiling-point elevation?Boiling-point elevation describes the phenomenon that the boiling point of a liquid will be higher when another compound is added, meaning that a solution has a higher boiling point than a pure solvent.
Step 1: Calculate the molality of the solution.We will use the definition of molality.
b = mass solute / molar mass solute × kg solvent
b = 30.0 g / (58.44 g/mol) × 3.75 kg = 0.137 m
Step 2: Calculate the boiling-point elevation.We will use the following expression.
ΔT = Kb × m × i
ΔT = 0.512 °C/m × 0.137 m × 2 = 0.140 °C
where
ΔT is the boiling-point elevationKb is the ebullioscopic constant.b is the molality.i is the Van't Hoff factor (i = 2 for NaCl).The normal boiling-point for water is 100 °C. The boiling-point of the solution will be:
100 °C + 0.140 °C = 100.14 °C
Assuming an ebullioscopic constant of 0.512 °C/m for the water, If you add 30.0g of salt to 3.75kg of water, the boiling-point elevation will be 0.140 °C and the boiling-point of the solution will be 100.14 °C.
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why is burning not a pahse change
Answer:
This is because it is a physical change not a chemical change.
what may cause some short term environmental changes how would organisms respond to these changes
Answer:
Refer to explanation
Explanation:
Weather is the main cause behind most short term environmental changes
For example, a period of heavy rain may lead to a pond overflowing, and flooding the nearby shrubbery
Animals in the area would adapt to this by trying to keep away from the flooded area until it dries out, once the rain ends
Explain what the color change indicated about the changes in the concentrations of Co(H2O) 6 2+ and CoCl 4 2- in each trial?
The color of the system will change between pink and blue depending on the concentration of species.
What is equilibrium?Equilibrium is attained in a reaction when the rate of forward reaction is equal to the rate of reverse reaction. Now consider the equilibrium;
Co(H2O)6^2+(aq) + 4Cl^-(aq) ⇄ CoCl4^2-(aq) + 6H2O(l)
We know that Co(H2O)6^2+(aq) is pink while CoCl4^2-(aq) is blue hence, if the concentration of the species are changed, the color of the system will change accordingly.
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Convert 18◦C to Kelvin.
291.15 Kelvin
I hope this helps
Answer:
18 degrees Celsius = 291.15 Kelvin
Explanation:
The formula for finding Kelvin through Celsius is by adding 273.15 to the Celsius. In this case, it is 18 + 273.15 = 291.15
:)
A 100g block of pine wood has a volume of 300 cm3. Would this block float on water (density of water is 1.0 g/cm3)?
A 120g block of pinewood has a volume of 300cm3. Would this block float on water? (HINT: Water has a density of 1g/cm3). a. No, because the block is denser than water.
Also here's a free meme
The density of a material represents the denseness of that material in a specific given area. If an object has a density less than water then it will float on water otherwise it will sink. Here the wood will float on water.
What is density?The density of a material denotes the measurement which compares the amount of matter an object has to its volume. An object with more matter in a certain volume has a high density. It is defined as the mass per unit volume.
The density is usually represented by symbol ρ or by the letter D. The formula used to calculate the density is:
Density = Mass / Volume
D = 100 / 300 = 0.33 g/cm³
Here the density of water is 1.0 g/cm³ which is greater than the density of pine wood. So the pine wood will float on water.
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I need help please. Thanks
Answer:
Battery
Explanation:
The battery supplies the electricity needed for the circuit to work.
How and Why did the Nazis dehumanized the Jews?
Topic sentence:
Text evidence:
Conclusion:
(Can someone help me out pls)
Answer:
Its because Hitler thought that there beliefs were trasha dn thought that these humans were worthless so he went out of his way to "DEHUMANIZE" them.
Explanation:
Giving brainiest and 100 points! <3
A. Cold front
The warm front symbol would be red and have circles instead of triangles.
The occluded front symbol would be purple with both, a triangle and a circle.
The stationary Front symbol is a mixture of both symbols from cold front and warm front.
hope that helps!!
Constance has an apple that weighs 85,000 milligrams and a peach that weighs 0.15 kilograms. which fruit has the greater mass? choose the words and numbers to complete the statements. convert the masses of both fruits to the same unit. 85,000 milligrams is the same as choose... grams. 0.15 kilograms is the same as choose... grams. the choose... has the greater mass.
The fruit which has the greater mass is peach i.e. 150 grams.
What is mass?Mass is a quantity which is used to define that what amount of substance will occupy any space or present in the given object.
We have given,
Weight of apples = 85,000 mg
Weight of peach = 0.15 kg
To compare the quantity first we have to convert both of these units in the same unit, and we know that:
In 1 kilogram = 1000 grams
And in 1 grams = 1000 milligrams
So, we convert both the units into grams as:
85,000 mg = 85,000 / 1000 = 85 grams
0.15 kg = 150 grams
So, the mass of peach is high.
Hence, peach has the greater mass.
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Answer:
Constance has an apple that weighs 85,000 milligrams and a peach that weighs 0.15 kilograms. Which fruit has the greater mass? Choose the words and numbers to complete the statements.
Convert the masses of both fruits to the same unit.
85,000 milligrams is the same as
85
grams.
0.15 kilograms is the same as
150
grams.
The
peach
has the greater mass.tion:
A neutralization reaction is a reaction between choose. That results in the formation of choose. And choose.
Neutralization reaction is the reaction that occur between acid and base.
What is Neutralization reaction?Neutralization reaction is the reaction that take place between acid and base to produce salt and water. For examples HCl react with NaOH to produce NaCl and H2O
Therefore, Neutralization reaction is the reaction between acid and base.
The question is not complete but the option are gotten from another website.
Here are the options.
an acid and a basea fuel and oxygenan acid and a metala salt and a baseLearn more about neutralization from the link below.
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please help there are 3 answers brainlies is included with the best answer.
SUMMATIVE FOSSILS/FOSSIL RECORD/HISTORY OF LIFE ON EARTH
FOSSILS CAN BE CATEGORIZED INTO 3 MAJOR TYPES. THEY ARE:
REPLACEMENT
METAMORPHIC
TRACE
SEDIMENTARY
IMPRESSION
Answer:
Your answers would be:
-impression fossils
-trace fossils
-replacement fossils
Explanation:
Have a great rest of your day
#TheWizzer
Answer:
The are id-k- I dont know much on fossials. But did you know that thunder is lighting. I say this because thunder is just the noise lighting makes. We see the light firts because light travels faster than sound.
Explanation:
Hope This Helps
Have A Great Day
~Zero~