Answer:
it has a huge surface-to-volume ratio, very high porosity and completely different physiochemical properties.
Explanation:
idk if the answer is good !
sorry
What is the name of C3H8?
Answer:
Propane
Explanation:
What volume of oxygen gas at 20°C and 0.919 atm is
consumed in the production of 5.00 g of iron(III) oxide from
metallic iron?
4Fe(s) + 302(g) → 2Fe2O3 (9)
LO2
Answer:
Volume of oxygen gas is 78.47L
Explanation:
Data;
Temperature (T) = 20°C = (20 + 273.15)K = 293.15K
Pressure (P) = 0.919atm
Mass (m) = 5g
Volume (v) = ?
Equation of reaction;
4Fe + 3O₂ → 2Fe₂O₃
From the equation of reaction, the number of moles of oxygen is 3.
To find the volume of oxygen produced, we'll have to use ideal gas equation
PV = nRT
P = pressure
V = volume
n = number of moles
R = ideal gas constant = 0.082J/mol.K
T = temperature of the ideal gas
PV = nRT
V = nRT/ P
V = (3 × 0.082 × 293.15) / 0.919
V = 72.1149 / 0.919
V = 78.47L
Volume of the gas is 78.47L
What is the molariity of a 50.0 mL aqueous solution containing 10.0 grams of copper (II) sulfate, CuSO4?
Answer:
The molarity is 1.26 [tex]\frac{ moles}{L}[/tex]
Explanation:
Molarity is a unit of concentration that is based on the volume of a solution and represents the number of moles of solutes contained in a liter. The molarity of a solution is calculated by dividing the moles of the solute by the liters of the solution and is expressed in units (moles / liter).
[tex]Molarity=\frac{number of moles of solute}{Volume}[/tex]
You must calculate the number of moles of CuSO₄. So, being:
Cu: 63.54 g/moleS: 32 g/moleO: 16 g/molethe molar mass of CuSO₄ is
CuSO₄=63.54 g/mole + 32 g/mole + 4* 16 g/mole= 159.54 g/mole
Then it is possible to apply the following rule of three: if 159.54 g of CuSO₄ are present in 1 mole, 10 g in how many moles are they?
[tex]moles=\frac{10 g*1 mole}{159.54 g}[/tex]
moles= 0.063 moles
Then:
number of moles of solute= 0.063 molesVolume= 50 mL= 0.05 L (Being 1L=1000 mL)Replacing in the definition of molarity:
[tex]Molarity=\frac{0.063 moles}{0.05 L}[/tex]
Molarity= 1.26 [tex]\frac{ moles}{L}[/tex]
The molarity is 1.26 [tex]\frac{ moles}{L}[/tex]
(02.02 MC)
How is Earth's surface most likely to change in a place that experiences strong sand storms?
Answer:
Mechanical weathering will cause wearing down of rocks.
Explanation:
All the other choices aren't suitable for a dry climate where sand storms occur.
The Sun is a constant supply of energy to Earth.
A. True
B. False
Is it illegal for fracking companies to let water that has been used for fracking deep back into the ground ?
Answer:
It is illegal
Explanation:
Fracking involves drilling deep into the earth crust in which a water mixture with high pressure is directed at the rock with the purpose of releasing the gas inside. This process is common in the exploration of natural gas and other hydrocarbons.
It is however illegal because the water are mostly contaminated due to the hydrocarbons present and harmful to life. It is advisable and the best to remove the water and recycle them in treatment plants
A 0.050L solution of Ba(OH)2 is neutralized by 0.072L of a 0.55 M HNO3 solution. What is the concentration of the Ba(OH)2 solution?
Answer:
0.396M
Explanation:
Step 1:
The balanced equation for the reaction. This is given below:
2HNO3 + Ba(OH)2 —> Ba(NO3)2 + 2H2O
From the balanced equation above,
The mole ratio of the acid (nA) = 2
The mole ratio of the base (nB) = 1
Step 2:
Data obtained from the question. This include the following:
Volume of base (Vb) = 0.05L
Concentration of base (Cb) =..?
Volume of acid (Va) = 0.072L
Concentration of acid = 0.55 M
Step 3:
Determination of the concentration of the base, Ba(OH)2.
The concentration of the base, Ba(OH)2 can be obtained as follow:
Cava /CbVb = nA/nB
0.55 x 0.072 / Cb x 0.05 = 2/1
Cross multiply to express in linear form
Cb x 0.05 x 2 = 0.55 x 0.072
Divide both side by 0.05 x 2
Cb = (0.55 x 0.072) / (0.05 x 2)
Cb = 0.396M
Therefore, the concentration of the base, Ba(OH)2 is 0.396M
what is the diffrence between displacement ans double displacement reactions write equations for these reactions
Answer:
Single Displacement reaction
In a displacement reaction, a more reactive element replaces a less reactive element from a compound.
Change in colour takes place with no precipitate forms.
Metals react with the salt solution of another metal.
Examples:
2KI + Cl2 → 2KCl + I2
CuSO4 + Zn → ZnSO4 + Cu
Double displacement reaction
In a double displacement reaction, two atoms or a group of atoms switch places to form new compounds.
Precipitate is formed.
Salt solutions of two different metals react with each other.
Examples:
Na2SO4 + BaCl2 → BaSO4 + 2NaCl
2KBr + BaCl2 → 2KCl + BaBr2
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What does the questions “how much?” and “how many?” have in common?
What organelle does the process of cellular respiration?
Answer:
Mitochondria
Explanation:
The mitochondrion is the site of cellular respiration. The first part of cellular respiration (glycolysis) happens in the cytoplasm. The second part of cellular respiration needs oxygen, and it occurs in mitochondria.
How many moles of H2 are needed to produce 18 moles NH3 in the reaction below?
N2 + 3 H2 —> 2 NH3
Answer:
27 moles of H₂
Explanation:
Equation of reaction:
N₂ + 3H₂ → 2NH₃
From the equation of reaction,
3 moles of H₂ is required to produce 2 moles of NH₃
3 moles H₂ = 2 moles of NH₃
X moles of H₂ = 18 moles of NH₃
X = (3 * 18) / 2
X = 27 moles of H₂
27 moles of H₂ is required to produce 18 moles of NH₃
pH of a 0.00072 M HCl solution.
Answer:
3.14
Explanation:
pH=-log(H+)
- Hope that helps! Please let me know if you need further explanation.
Analysis: The limiting reactant(s) appeared to be
because
there is nothing with which it can react
Explanation:
The limiting reactant(s) prevents a reaction from continuing because there is none left.
Why do limiting reactants occur?Identification of the limiting reactant makes it possible to calculate the theoretical yield of a reaction. The reason there is a limiting reactant is that elements and compounds react according to the mole ratio between them in a balanced chemical equation.
How do you get the limiting reactant?The reactant that is consumed first and limits the amount of product(s) that can be obtained is the limiting reactant. To identify the limiting reactant, calculate the number of moles of each reactant present and compare this ratio to the mole ratio of the reactants in the balanced chemical equation.
Learn more about Limiting Reactant(s) here
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1.
__________ are the most organized state of matter.
Solids
Liquids
Gases
2.
States of matter change when ________ is added or removed.
Plasma
Energy
3.
Which state of matter has the most movement of its particles?
Solid
Liquid
Gas
Solids are the most organized state of matter. States of matter change when energy is added or removed. Gas is the state of matter has the most movement of its particles.
What are the states of matter?The states of matter are the different forms of the matter in which it can exist. They are solids, liquids and gases. Solids are the states of matter in which molecules are very near to each other. They have fixed shape and volume. Liquids is the states of matter in which molecules are a little far from each other. They have different shape and fixed volume. Gas is the states of matter in which molecules are a very far from each other. They have different shape and different volume.
There are two more states of matter which are called as Plasma, Bose Einstein Condensate.
Plasma have highest energy and Bose Einstein Condensate have lowest energy.
Therefore, Solids are the most organized state of matter. States of matter change when energy is added or removed. Gas is the state of matter has the most movement of its particles.
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Addition of _____________ to pure water causes the least increase in conductivity
organic molecules
because organic molecules does not dissociate in water
How many carbon and hydrogen atoms are there?
Answer:
13 carbon and 24 hydrogen
Explanation:
There are 24 hydrogen atoms.
There are 13 carbon atoms.
Which of these conclusions is correct about P and Q in the diagram?
P represents the land and Q represents the ocean.
P represents the ocean and Q represents the land.
P represents the land and Q represents the atmosphere.
P represents the atmosphere and Q represents the ocean.
Answer:
P represents the atmosphere and Q represents the ocean.
Explanation:
what happens when light is not spread out
Answer:
Spreading out a wave over a larger area just causes the wave strength to weaken, but does not cause gaps to form. Therefore, if you look at photons as waves, spatial gaps never form in light as it travels through free space, no matter how dim it gets.Spreading out a wave over a larger area just causes the wave strength to weaken, but does not cause gaps to form. Therefore, if you look at photons as waves, spatial gaps never form in light as it travels through free space, no matter how dim it gets
Explanation:
How killers cover up their crimes
Answer:
They hide their evidence and destroy any if absolutely necessary. You also would need to wear gloves, so you dont put your identity everywhere. Also, you need to flee and just forget that what you did, did not happen. And hope you dont get arrested xD
Explanation:
HELP PLEASE I WILL GIVE 100 PONTS
All of the following properties of a solution would decrease if you increased the concentration of solute, EXCEPT which?
A. freezing point
B. boiling point
C. vapor pressure
D. they would all decrease
Answer:
boiling point
Explanation:
Ideal Stoichiometry
Barium oxide has a replacement reaction with lithium. Calculate the mass of Barium oxide needed to react with 34.67 g of lithium.
*equation needed and thorough explanation please*
A- 340.5
B- 383.0
C- 455.0
D- 256.8
Answer:
the answer is 383.0
hope it is helpful
1. Calculate the molarity of 35g of calcium chloride (CaCl2) that is dissolved in 850ml of water. (Calculate moles first)
a. 0.27M
b. 0.38M
c. 0.32M
d. 0.80M
2. Calculate the molarity of 90g of copper sulfate (CuSO4) when dissolved in 5 L of water.
a. 0.112M
b. 2.8M
c. 0.56M
d. 0.50M
3. What is the molarity of NaOH if 0.70 moles are dissolved in 250 ml of water?
a. 175,000M
b. 2.8M
c. 0.175M
d. 4M
4. How many moles of Lithium oxide (Li20) are in 2 L of solution with a molarity of 2.0M?
a. 1 mole
b. 2 moles
c. 0.2 moles
d. 4 moles
5. How many moles of NaCl are in 7.5 L of 0.5M?
a. 3.75 moles
b. 15 moles
c. 0.066 moles
d. 2.5 moles
Answer:
yo I got same question do u know it
Whats the answer to 7/2 × 1/5?
Answer:7/10
Explanation:multiply top and bottom
What Newton’s law is this a example of:
When a bullet is fired from a rifle through a small explosion. The rifle shooting the bullet is pushed backwards after the explosion.
Answer:
Newton's third law
Explanation:
every action has an equal and opposite reaction.
ILL GIVE YOU BRAINLIST * have to get it right * !!! Although individual body systems can perform specific functions, they depend on one another and work together for the good of the entire organism.
Which of the following provides the best evidence that the digestive system and the muscular system work together to carry out their functions?
Do liquids have higher coefficients of expansion than solids do
Answer: yes they do.
Explanation:
I'm tryna get more points because my other account got blocked for the next 48 hours.
(Don't be mad at me please)
Leon made a study chart about human-induced changes to
the environment.
Which headings best complete the chart?
Environmental Changes Caused by Humans
X: Habitat Destruction
Y: Pollution
Y
Results from
introducing harmful
substances into the
Results from natural areas
being cleared and replaced
by human development
© X: Long-Term Changes
Y: Short-Term Changes
X: Short-Term Changes
Y: Long-Term Changes
0 X: Pollution
Y: Habitat Destruction
environment
Example: deforestation
Example: oil spill
The question was not well arranged above. It has been arranged in the answer below.
Question:
Leon made a study chart about human-induced changes to the environment.
Environmental Changes Caused by Humans
X Y
Results from introducing harmful substances into the environment
Example: oil spill
Results from natural areas being cleared and replaced by human development
Example: deforestation
Which headings best complete the chart?
X: Habitat Destruction
Y: Pollution
X: Long-Term Changes
Y: Short-Term Changes
X: Short-Term Changes
Y: Long-Term Changes
X: Pollution
Y: Habitat Destruction
Answer:
X: Pollution
Y: Habitat Destruction
Explanation:
From the above question, Leon gave us two variables, X and Y.
The human induced changes were divided into two.
1. Results from introducing harmful substances into the environment
Introducing harmful substances into the environment is also called pollution. And we can represent this as X which is the first variable.
2. Results from natural areas being cleared and replaced by human development.
This description given in number two above whereby land areas are been cleared and replaced by human development has a negative effects on the environment because the vegetation which includes the trees are been cut down and living organisms(animals) will go extinct gradually. This act affect the balance of the ecosystem and it can be referred to as the destruction of the habitat of living organisms
Therefore, the correct headings best complete the chart is :
X: Pollution
Y: Habitat Destruction
Answer:
what the top person said
Explanation:
☺
Explain on any two materials that you would expect to use for the wheelchair (both back support and
arm support) with less generation of heat during the hot summers.
Answer:
In the backrest use materials where it is easy to clean and where they do not absorb fluids, in this way it would be cooler, such as an ecological leather simulator.
And in the armrest as well, but in both areas we must not rule out that if or if it should have even a minimum of padded surface so that the patient or the person who spends most of the day in the wheelchair does not suffer from joint pain.
Explanation:
Some wheelchair factories also implement modern chairs where they are made of stainless steel structures lined with padded material with perforated fabrics that allow breathing and aeration of body areas that have contact with the fabric.
Answer the questions using the drop-down menus.
Which is the independent variable in this experiment?
Which is the dependent variable in this experiment?
Which is a controlled variable in this experiment?
In the experiment to measure the heat absorbed by a material placed in
the Sun, we have;
The independent variable is either the angle of insulation or the type of materialThe dependent variable is the temperature of the materialThe controlled variable is the type of material when the angle of insulation is the independent variable and vice versaWhat differentiates the given experimental variables?The possible experiment is with regards to the factors that influence energy from the Sun
The factors investigated are;
The type of material and the angle of lighting (insulation) affects the absorption of heat
The independent variable is the variable that is the cause of the effect
measured in the experiment.
It is the variable that the researcher has control over or controls and
varies during the experiment to produce the measured effect.
In the above experiment, the independent variable are either ;
The angle of insulation or the type of material respectivelyThe dependent variable is the variable that is under test or that is being measured.
In the above experiment the dependent variable is the temperature of the material which can be measuredThe controlled variable is the variable that remains the same or is held
constant during the experiment and can be used as reference to
compare the dependent variable.
In the experiment, the controlled variable are either;
The type of material when the angle of insulation is the independent variable or vice versaLearn more about independent and dependent variables here:
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Answer:
angle of light
temperature of material
type of material
Explanation:
E d g e 22 !
Which answer gives both a positive impact and a negative impact associated with the effects of nitrogen- and phosphorus-enhanced fertilizers?
A- increased algal blooms and damage to drinking water
B- increased plant growth and damage to drinking water
C- increase in denitrifying bacteria and increase in plant growth
D- increase in a limiting resource and increase in denitrifying bacteria
Answer:
The answer is B
Explanation:
Answer:
Which answer gives both a positive impact and a negative impact associated with the effects of nitrogen- and phosphorus-enhanced fertilizers?
1. increased algal blooms and damage to drinking water
Right Answer 2. increased plant growth and damage to drinking water
3. increase in denitrifying bacteria and increase in plant growth
4. increase in a limiting resource and increase in denitrifying bacteria
Explanation:
