Answer:
i think it will increase the rate of chemical reaction as pressure is directly proportional to the reactivity of gas.
In the past mining companies were not made responsible for the clean-up of any of
the mine sites. As a result, abandoned mines had a severe impact on the
environment in Ontario. Which of these is not a result of these mining practices?
a)
Chemical reactions producing sulphuric acid decrease soil and water ph in the
area.
b)
Acid leaching dissolves metals found in the soil thus allowing them to enter
the water system.
c)
Heavy metals which are left tailing ponds can dissolve and enter the water
system.
d)
Old and inefficient mining smokestacks contaminate the soils around
abandoned mine sites.
Find the 5 number summary for the number of chapters in the Old Testament. (Recall that the 5-number summary is the minimum, lower quartile, median, upper quartile, and maximum.)
Hey, I am doing this project right now too. Did you end up figuring out the answer to this? I do not understand this at all. Message me back pls!
In the equation 2KCIO3 → 2KCI + 302, how many moles of oxygen are produced when 12.61 mol of
KCIO3 decompose completely?
Select one:
O a. 19
Ob. 8.4
O c. 6.3
O d. 13
PLEASE I AM BEGGING PLEASE HELP ME
Answer:
A 19
Explanation:
2 mole of KClO3 produces 3 mole of O3
2 : 3
1 : 3/2
12.61 : 3/2 × 12.61
12.61 : 18.9
12.61 mole of KClO3 produces 18.9mole of O2.
Which element's total number of electrons is equal to the number of core
electrons in iron (Fe)?
The Periodic Table
O A. Potassium (K)
B. Argon (Ar)
C. Krypton (Kr)
D. Sodium (Na)
Answer:
i belive its b
Explanation:
Which of the following is best described by the term macroscopic?
A. Water in the liquid phase boils to become a gas.
B. Water molecules in the solid phase are tightly held together.
C.H2O
D. Water is composed of two hydrogen atoms and one oxygen atom.
Answer:
A
Explanation:
Since macroscopic means visible to the naked eye without a microscope it would be A. This is because we can see active phase changes in real time without any magnification like water boiling or ice melting.
Answer:
a is the correct answer
Explanation:
The overall process of photosynthesis has the balanced chemical equation 6CO, +6H,0 CH.0, 60, What does this tell you about the relative amounts of carbon
dioxide and water consumed in this process?
A. For every six moles of carbon dioxide consumed, one mole of water is consumed
B. For every mole of carbon dioxide consumed, one mole of water is consumed
C. For every gram of carbon dioxide consumed, one gram of water is consumed
D. For every six grams of carbon dioxide consumed, one gram of water is consumed.
Answer:
(C)
Explanation:
Because of the physics of it.
According to the overall equation of photosynthesis as follows: 6CO2 + 6H2O = C6H12O6 + 6O2, for every mole of carbon dioxide consumed, one mole of water is consumed.
What is photosynthesis?Photosynthesis is the process by which plants and other photoautotrophs convert light energy into chemical energy.
Photosynthesis makes use of carbon dioxide and water to produce glucose and oxygen as follows:
6CO2 + 6H2O = C6H12O6 + 6O2
This chemical equation suggests that for every mole of carbon dioxide consumed, one mole of water is consumed.
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What is the concentration of a solution when 50.0 mL of 0.436 M NH ₄NO ₃ is diluted to a new volume of 250.0 mL
Answer:
0.0872 M
Explanation:
Use the equation M1V1 = M2V2
0.436(50.0) = (x)(250.0)
21.8 = 250x
0.0872 = x
250 g H 2 SO 4 completely reacted with aluminum?
2AI(s) + 32504(aq)- AI2 (504) 3(aq) + 3H 2 (9)
0.85g
450g
290g
870g
Answer: 290 g of aluminium sulphate is produced.
Explanation:
To calculate the moles :
[tex]\text{Moles of solute}=\frac{\text{given mass}}{\text{Molar Mass}}[/tex]
[tex]\text{Moles of} H_2SO_4=\frac{250g}{98g/mol}=2.55moles[/tex]
The balanced chemical reaction is:
[tex]2Al(s)+3H_2SO_4(aq)\rightarrow Al_2(SO_4)_3(aq)+3H_2(g)[/tex]
According to stoichiometry :
3 moles of [tex]H_2SO_4[/tex] produce = 1 mole of [tex]Al_2(SO_4)_3[/tex]
Thus 2.55 moles of [tex]H_2SO_4[/tex] will require=[tex]\frac{1}{3}\times 2.55=0.85moles[/tex] of [tex]Al_2(SO_4)_3[/tex]
Mass of [tex]Al_2(SO_4)_3=moles\times {\text {Molar mass}}=0.85moles\times 342g/mol=290g[/tex]
Thus 290 g of aluminium sulphate is produced.
Which of the following is a unit of volume of liquids? (4 points) Gram Liters Liters per cubic gram Gram per cubic centimeter
Answer:
Liters
Explanation:
Answer:
Liters
Explanation:
Grams are used to measure weight, and cubic centimeters are used to measure length.
What is the mole ratio of NH3 to N2? 2:4 4:2 4:4 7:2
Answer:
B). 4:2
Explanation:
Mole ratio is described as the ratio between the number of moles present in two compounds that are entailed in a chemical reaction. These ratios are employed as the factors of conversion among the products as well as reactants in various chemical problems.
The chemical equation for the given reaction between NH3(ammonia) and N2(nitrogen) would be as follows:
2 NH3(g) --> N2(g) + 3 H2(g)
Since two moles of ammonia are required to make one mole of nitrogen. Therefore, the ratio of ammonia to nitrogen would be 4:2 or 2:1. Hence, option B is the correct answer.
Answer:
B - 4:2
Explanation:
At a certain temperature, Ke = 3 for the reaction NO3(g) NO(g) + O2(g) Find the direction of thereaction if at some point in time in a 1.0 vessel the following respective concentrations were measured; [NO] = 2.0 mol/L, [O2] = 1.0 mol/L and NO3(g) = 0.75 mol/L.
What precipitate sometimes forms during an acid-base neutralization reaction?
a)
sugar
b) water
c) salt
d) carbon
Answer:
The answer is option C.
Salt
Hope this helps you
A 13.00 g sample of citric acid reacts with an excess of baking soda as shown in the equation.
H3C6H507+3NaHCO3->3CO2+3H20+Na3C6H507
What is the theoretical yield of carbon dioxide? 0.993 g 2.98 g 3.65 g 8.93 g
Answer:2.98
Explanation:
Answer:
D) 8.93 g
Explanation:
MODomy
OCTORS
Question 14 Multiple Choice Worth 5 points)
(07.04 MC)
The final stage of polymerase chain reaction to create a new strand of DNA that binds to the original strand, where special enzymes
attach to primers and attach complementary bases along the strand, is called
annealing
extension
denaturing
hybridization
Question 15/Multiple Choice Worth 5 points)
7
(07.04 MC)
Answer:
hybridization is the correct answer i guess
Answer:
Extension
Explanation:
PCR has three stages: denaturing, annealing, and extension (in this order).
I, myself, took this exam and got the answer correct.
The pH of a substance can only be determined when it is
a) dried in a powder
b) frozen
c) dissolved in water
d) heated
The pH of a substance can only be determined when it is frozen. Hence, option B is correct.
What is pH?pH stands for Hydrogen potentials.
The use of the pH scale is one practical way of quantitatively determining how acidic something is.
If the pH of a solution is less than 7, it is acidic. If the pH is 7, the solution is neutral and if the pH is greater than 7,the solution is basic.
The pH of a substance can only be determined when it is frozen. Hence, option B is correct.
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1. Give IUPAC for the following compound
Answer:
Ethane
Explanation:
Which of the following is an example of an informed opinion?
A. Organic foods are healthier because an online blog said they only use natural pesticides.
B. Horoscopes are accurate because they always get aspects of my personality correct.
C. Feng shul is real because I felt happler when I rearranged my living room.
D. Organic foods are not always healthier because the World Health Organization published data showing many natural pesticides to be more toxic than regular ones.
Answer:
D. Organic foods are not always healthier because the World Health Organization published data showing many natural pesticides to be more toxic than regular ones.
Explanation:
Informed opinions are ones based off of trustworthy and accurate information.
D is the correct answer because the opinion is based off of accurate and reliable information from the WHO, while the other answer choices are biased opinions from unreliable sources or themselves.
Organic foods are not always healthier because the World Health Organization published data showing it is an example of an informed opinion (Option D).
What is an informed opinion?An informed opinion is a piece of well-sustained information that has a scientific basis to be contrasted.
An informed opinion must be taken onto account over other types of pseudoscientific information.
In conclusion, organic foods are not always healthier because the World Health Organization published data showing it is an example of an informed opinion (Option D).
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Plants can only
cause mechanical weathering.
Please select the best answer from the choices provided
OT
OF
Answer:
Ice wedging, pressure release, plant root growth, and abrasion can all cause mechanical weathering. in the cracks and pores of rocks, the force of its expansion is strong enough to split the rocks apart. This process, which is called ice wedging, can break up huge boulders.
Answer:
f
Explanation:
Which statement best describes how an ionic bond forms?
The transfer of electrons forms strong bonds between ions.
The sharing of electrons forms strong bonds between ions.
The transfer of electrons results in attractive forces between molecules
The sharing of electrons results in attractive forces between molecules
Mark this and return
Save and Exit
Nexus
Submit
Answer:
The transfer of electrons forms strong bods between ions
Explanation:
Explain how energy is conserved between this reaction and the and surrounding environment C3H8+4O2->3CO2+4H2O+ heat (-2218.6)
Answer:
The heat of formation = Heat of formation of the products - Heat of formation of the reactants
= -2323 + 104 = -2219 ≈ -2218.6 kJ/mol.
Explanation:
The law of conservation of energy states that the total energy is constant in any process. Energy may change in form or be transferred from one system to another, but the total remains the same
The heat of formation of C₃H₈ is 3C + 4 H₂ → C₃H₈ [tex]\Delta H^{\circ}_f[/tex] -104 kJ/mol
The heat of formation of O₂ is O₂ (g) → O₂ (g) [tex]\Delta H^{\circ}_f[/tex] 0 kJ/mol
The heat of formation of H₂O is H₂(g) + 1/2 O₂→ H₂O (g) [tex]\Delta H^{\circ}_f[/tex] -286kJ/mol
The heat of formation of CO₂ is C (s) + O₂ (g) → CO₂ (g) [tex]\Delta H^{\circ}_f[/tex] -393 kJ/mol
Therefore, in the given reaction we have;
C₃H₈ + 4 O₂ → 3 CO₂ + 4 H₂O
The heat of formation = Heat of formation of the products - Heat of formation of the reactants
The heat of formation = 3 × (-393) + 4 × (-286) - (-104) = -2219 ≈ -2218.6 kJ/mol.
In order from left to right, what are the coefficients (front numbers) needed to
balance the following equation? CzH6 + O2- CO2 + H20*
Answer:
10CH6 + 10O2 → 10CO2 + 3H20
Explanation:
Calculate the heat of reaction, ∆H°, for the following:
3FeCl2(s) + 4H2O(g) Fe3O4(s) + 6HCl(g) + H2(g)
Answer:
562.76 kJ
Explanation:
∆H° (kJ) is the total of the heats of formation of the products minus the total of the heats of formation of the reactants.
NB: look up the heats of formation of the compounds in the heats of formation reference tables, it is found at the back of most chemistry text
heats of formation of the products (i.e. Fe₃O₄(s) , 6HCl(g) , H₂(g) ) = -1120.9 + 6(-92.3)+ 0 = -1674.7 kJ
heats of formation of the reactants (i.e. 3FeCl₂(s) , 4H₂O(g) ) =3(-423.42) + 4(-241.8) = -2237.46kJ
∆H° = -1674.7 kJ - (-2237.46kJ) =562.76 kJ
In what way does the shape of a molecule affect how the molecule is involved with living systems?
A. It determines the weight of a molecule
B. it determines what elements are in a molecule
C. it determines oxidation states present in a molecule
D. it determines how the molecule functions
There are two characteristics of molecules, one is geometry and other is shape. Shape is excluding lone pair surrounding the central element and geometry is including the lone pair. Therefore, the correct option is option D.
What is VSEPR theory?VSEPR stands for valence shell electron pair repulsions. VSEPR theory is used to predict the shape and geometry of molecules on the basis of valence electrons pairs that are present around the central element of the molecule.
According to VSEPR theory, Lone pair lone pair repulsion is greater than bond pair bond pair repulsion. There are so many limitations of VSEPR theory. There is a repulsion between bond pair electrons and lone pairs present on the central element. The shape of a molecule affect how the molecule is involved with living systems as it determines how the molecule functions.
Therefore, the correct option is option D.
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A reversible reaction has an equilibrium constant of 0.75. If the forward rate constant is 0.62 mol/L/s, what's the reverse reaction rate constant?
A. 0.910
B. 0.827
C. 1.010
D. 1.210
Answer: B.) 0.827
Explanation:
Given the following :
Equilibrium constant (k) = 0.75
Forward rate constant = 0.62 mol/L/s
Backward rate constant =?
The equilibrium constant denited as 'k' is the proportion of the forward rate constant and the reverse rate constant.
Mathematically,
K = [forward rate constant / Reverse rate constant]
k = 0.75 ; forward rate constant = 0. 62mol/L/s
0.75 = [ 0.62mol/L/s ÷ reverse rate constant]
Reverse rate constant * 0.75 = 0.62mol/L/s
Reverse rate constant = (0.62mol/L/s ÷ 0.75)
Reverse rate constant = 0.8266mol/L/s
Reverse rate constant = 0.827mol / L/s
Answer:
0.827
Explanation:
why do synthetic fibers cause soil pollution
Answer:
because they don't decay easily bue to which if we throw on soil than it causes pollution.
Answer:
Explanation:
Sythetic fibres do not have air spaces or pores in them... it chokes the soil and block the pores through which water can flow so the soil is unable to take up air or absorb water.... henc its quality decreases, roots of plats are unable to suck up water, Synthetic fibres take years to decay...therefore causes soil pollution
I really need help!!!
look at the three chemical equations below. How many atoms of each element are in reactants? How many atoms of each element are in the products?
2H2 + O2➔ 2H2O
2Fe203➔ 4Fe+ 3O2
CI2+ 2NaBr➔ 2NaCI+ Br2
would throwing a penny from a higher place have a more impact to the head or it will still feel light.
Answer:
head
Explanation:
Calculate the volume in liters of a 0.00183g / L mercury(1) chloride solution that contains 125 mg of (Hg 2 Cl 2 ) .
Answer: 68.3L
Explanation:
Density = Mass / Volume
Density = 0.00183 g/L
Mass = 125 mg = 0.125g
Volume = Mass / Density = 68.3L
In this lab procedure, the ___ variable is the number of half-life cycles (time) and the ___ variable is the number (or fraction) of (radioactive) Lincolnium nuclei remaining at that time.
Answer:
Independent, Dependent
Explanation:
In the given lab procedure, the number of half-life cycles or the time in which the number of nuclei in radio-active substance turns into its half would be characterized as the 'independent' variable as it directly affects the dependent variable i.e. 'the number(or fraction) of Lincolnium nuclei remaining at that time.' The number of nuclei would be the dependent variable as it bears the change or effect of a change in the independent variable(half-life cycle).
Answer:
Its independent and dependent
Explanation:
On Edge 2021
i’m BEGGING you PLEASE help me :(((
Answer:
C.
Explanation:
Since we are trying to find the amount of moles of oxygen, we use the balanced equation to help us out. Since there are 4 moles of Sb for every 3 moles of oxygen, we must use a conversion to let us get rid of the Sb unit and get our desired unit of moles of oxygen. Therefore, C is our best answer.