Answer:
Increase the concentration of the reactants.
Explanation:
This question seems vague, but to put it simply, the reaction rate decreases with a decrease in temperature, so we need to find a way to increase the reaction rate again. When you lower temperature, the molecules are slower and collide less. So therefore, in other words, we need to find a way to increase the rate of collisions between molecules. When the temperature drops, if we increase the concentration of the reactants, we are able to increase the rate of collisions between molecules. As a result, reaction rate is increased once again.
If the temperature of a chemical change was reduced,the reaction rate could most likely be increased by increasing the concentration of the reactants.
What is a chemical change?Chemical changes are defined as changes which occur when a substance combines with another substance to form a new substance.Alternatively, when a substance breaks down or decomposes to give new substances it is also considered to be a chemical change.
There are several characteristics of chemical changes like change in color, change in state , change in odor and change in composition . During chemical change there is also formation of precipitate an insoluble mass of substance or even evolution of gases.
There are three types of chemical changes:
1) inorganic changes
2)organic changes
3) biochemical changes
During chemical changes atoms are rearranged and changes are accompanied by an energy change as new substances are formed.
Learn more about chemical change,here:
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Separation units often use membranes, absorbers, and other devices to reduce the mole fraction of selected constituents in gaseous mixtures. Consider a mixture of hydrocarbons that consists of 62 percent (by volume) methane, 28 percent ethane, and 10 percent propane. After passing through a separator, the mole fraction of the propane is reduced to 1 percent. The mixture pressure before and after the separation is 100 kPa. Determine the change in the partial pressures of all the constituents in the mixture.
Answer:
See explanation
Explanation:
We first obtain the mole fraction of propane at the start and end;
0.01 = x/0.62 + 0.28 + x
0.01[0.62 + 0.28 + x] = x
0.01[0.9 + x] =x
9 * 10^-3 + 0.0.1x = x
9 * 10^-3 = x - 0.0.1x
9 * 10^-3 = 0.99x
x = 9 * 10^-3/0.99
x = 9.09 * 10^-3
After
For methane
0.62/ 0.28 + 0.62 + 9.09 * 10^-3 = 0.68
For ethane
0.28/0.28 + 0.62 + 9.09 * 10^-3 =0.31
Change in partial pressure of methane = (0.68 - 0.62) * 100kPa = 6 kPa
Change in partial pressure of ethane = (0.31 - 0.28) * 100kPa = 3 kPa
Change in partial pressure of propane= (0.01 - 0.1) * 100kPa = -9 kPa
1. Write the word equation for the reaction occurring between lead nitrate and sodium chloride. 2. From your answer in 1 write a balance chemical equation showing all state symbols. 3. Then write the ionic equation for the react ion occurring.
Explanation:
Word Equation
Lead Nitrate + Sodium Chloride --> Lead Chloride + Sodium Nitrate
Balanced Chemical Equation
2 NaCl (aq) + Pb(NO3)2 (aq) → PbCl2 (s) + 2 NaNO3 (aq)
Ionic Equation
In an ionic equation, the aqueous species in the reaction are broken up into ions.
2Na⁺ + 2Cl⁻ + Pb²⁺ + 2NO₃⁻ → PbCl2 (s) + 2Na⁺ + 2NO₃⁻
calculate the number of moles of al2o3 that are produced when 3.60 mol fe is produced in the following equation. 2Al+3FeO—> 3Fe+Al2O3
Answer:
5. a
Explanation:
Al+3FeO—> 3Fe+ Al2O3
3.60—>3.60÷3=1.20 (mol)
What is the molarity to the nearest hundredth of a solution made by dissolving 1.71 moles of NaOH in enough water to produce an 875 mL solution? (REMINDER THE VOLUME MUST BE IN L. 1000 ML = 1 L)
Answer:
Explanation:
50 is the volume
Answer: 1.95 mol/l
Explanation: molarity = concentration = amount of substance/volume.
Also v = n/V= 1.71 mol/ 0.875 litres= 1.9542857 mol/l
Needing help please help me
Answer:
18. E. 0%
19. D. 25%
Explanation:
Question 18:
Let's use "B" to represent the dominant allele of "light blue skin", and
"b" for recessive "light green skin".
Squidward => BB - light blue skin
Squidward's bride => bb - light green skin
When they cross, they will have the following offsprings:
(BB) × (bb) - Parent
(Bb) (Bb) (Bb) (Bb) - Offspring
All the offspring would be light green skin. The dominant allele of light green skin will express itself over the recessive allele.
Therefore, the chances of Squidward and his bride having light green skin is 0%
Question 19:
Squidward's son => Bb - light blue skin
Squidward's son's bride => Bb - light blue skin
(Bb) × (Bb) - parent
(BB) (Bb) (Bb) (bb) - offspring
They will have the following offspring:
BB and Bb - light blue - 75%
bb - light green - 25%
Chance of having offspring with light green skin is 25%
Karen has 21 green blocks. The ratio of green blocks to the yellow blocks she owns is 3:1. How many blocks does she own?
Answer:
28 blocks
Explanation:
Amount: 21 + y
Ratio: 3:1
Total Ratio: 4
1 = yellow blocks
say if 3 is to 1 then 21 is to how many?
21 ÷ 3
= y = 7
= 21 + 7
= 28 blocks
( or you can use the practical method using your fingers )
QUICK HURRY FIRST ANSWER GETS BRAINLIST!!!! Why is it important to add coefficients to the
reaction equation to make it balanced? (Hint: your
answer should talk about the law of conservation of mass)
I need help I tried many times and I don’t get it
Answer: ummm what is this cause I don't get it either
Explanation:
i need help with this to lol
What does the prefix “geo” mean?
Please Help
I will give you Brainlist
Which of the following is a part of the kinetic-molecular theory?
(PLEASE HELP)
Your answer:
Most of the volume of a gas is occupied by gas particles.
The particles of a gas are in constant, random motion.
The average kinetic energy of a gas is dependent upon the identity of the gas.
Gases have indefinite shape and indefinite volume.
Attractive forces between gas molecules must be accounted for with a gas law calculation.
Answer:
2)The particles in a liquid are moving past one another constantly.
3)The particles in gas move freely in all directions.
4)The particles in a solid vibrate in a fixed position.
6)The particles in a gas have few attractions between them.
7)The particles in all states of matter are always moving.
Explanation:
I can determine the molar mass of an element by looking on the Answer under the atomic mass for the element.
Answer:
YES that is the molar mass can be found as the atomic mass of a single atom, BUT when you get to larger molecules your molar mass will be a combination of atomic masses.
Explanation:
Methanol, CH3OH, is the simplest of the alcohols. It is synthesized by the reaction of hydrogen and carbon monoxide. Write chemical reactions. If 500 mol of CO and 750 mol of H2 are present, which is the limiting reactant?
Answer:
The limiting reactant is H₂
Explanation:
The reaction of hydrogen (H₂) and carbon monoxide (CO) to produce methanol (CH₃OH) is the following:
2H₂(g) + CO(g) → CH₃OH(g)
From the balanced chemical equation, we can see that 1 mol of CO reacts wIth 2 moles of H₂. So, the stoichiometric ratio is:
2 mol H₂/1 mol CO = 2.0
We have 500 mol of CO and 750 mol of H₂, so we calculate the ratio to establish a comparison:
750 mol H₂/500 mol CO = 1.5
Since 2.0 > 1.5, we have fewer moles of H₂ than are needed to completely react with 500 moles of CO. In fact, we need 1000 moles of H₂ and we have 750 moles. So, the limiting reactant is H₂.
Fluorine gas reacts with aqueous iron (II) iodine to produce iron (II) fluoride and iodine liquid What is the balanced chemical equation for this reaction?
Answer:
F₂ (g) + FeI₂ (aq) → FeF₂ (aq) + I₂ (l)
Explanation:
Our reactants are:
F₂ → Fluorine gas, a dyatomic molecule
FeI₂ → Iron (II) iodine
Our products are:
I₂ → Iodine
FeF₂ → Iron (II) fluoride
Then, the reaction is:
F₂ (g) + FeI₂ (aq) → FeF₂ (aq) + I₂ (l)
We see it is completely balanced.
three ways how travelers should be considerate towards other travelers when using public transport
The three ways in which travelers should be considerate when using public transport include the following:
Use of headphonesUsing a handkerchief when sneezingNot stepping on people by being aware and vigilantWhat is a Public transport?This is the type of transport which is available to the general public such as trains, buses etc.
It is best to be considerate when using it by applying the following methods mentioned above to prevent disturbance and conflict.
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Is the water found in the watershed clean and safe for drinking?
(No plagiarism & will give brainliest)
A sample of nitrogen occupies a volume of 3.0 L at 0 ℃ and 1.21 atm pressure. To which temperature (in ℃) should the gas be cooled in order to halve its volume while maintaining a constant pressure?
Answer:
Thegas should be cooled to -136.5°C.
Explanation:
Volume of a gas is directly proportional to its temperature on the kelvin scale. This is called Charles' law.
Initially, the gas had a volume of 3.0 L at 0°C(273 K).
We have to have the temperature at which the volume of the gas will be 1.5 L.
Let V1=3 L, T1=273 K, V2=1.5 L, T2=?
By Charles' law,
V1/T1=V2/T2
T2
=(V2×T1)/V1
=(1.5 L×273K)/3L
=136.5 K
=(136.5-273)°C
= -136.5 °C
In the graphic,
X represents which element?
31
x
15
Answer:
B. X represents phosphorus
Explanation:
In an isotope symbol, you write the mass number above the atomic number. So the 31 represents the mass of the protons and neutrons of the element added together, and the 15 represents the atomic number or the total number of protons in the nucleus.
What can the period number of an element tell us about that element?
Answer:
All of the elements in a period have the same number of atomic orbitals.
Explanation:
How many kJ are 3,340J?
options:
3,340,000 kJ
334,000 kJ
3.340 kJ
33.40 kJ
How do the ideas of electrolytes and IV fluids relate?
Answer:
Electrolytes, particularly sodium, help the body maintain normal fluid levels in the fluid compartments because the amount of fluid a compartment contains depends on the amount (concentration) of electrolytes in it. If the electrolyte concentration is high, fluid moves into that compartment (a process called osmosis).
Explanation:
Answer:
Electrolytes are minerals in your body that have an electric charge. They are in your blood, urine, tissues, and other body fluids. Electrolytes are important because they help
Balance the amount of water in your body
Balance your body's acid/base (pH) level
Move nutrients into your cells
Move wastes out of your cells
Make sure that your nerves, muscles, the heart, and the brain work the way they should
Sodium, calcium, potassium, chloride, phosphate, and magnesium are all electrolytes. You get them from the foods you eat and the fluids you drink.
The levels of electrolytes in your body can become too low or too high. This can happen when the amount of water in your body changes. The amount of water that you take in should equal the amount you lose. If something upsets this balance, you may have too little water (dehydration) or too much water (overhydration). Some medicines, vomiting, diarrhea, sweating, and liver or kidney problems can all upset your water balance.
Treatment helps you to manage the imbalance. It also involves identifying and treating what caused the imbalance.
hope it's help you plz mark as brain listHow many atoms are in magnesium acetate!? Please I cant answer its and feel free to add me
Answer:
Hey this is your answer 59.05.
Explanation:
C) $18.06 \times {10^{23}}$ D) $24.08 \times {10^{23}}$ Hint: In order to find the number of atoms in 48 g of Mg, use the formula which relates the number of particles/atoms with the Avogadro number and number of moles of the substance and this required formula is: number of atoms = number of moles × Avogadro's number.
Please can I have brainliest :]
CAN SOMEONE PLEASE HELP ME?!
Answer:
no
Explanation:
because
6. Besides hydrogen and the polyatomic ion ammonium, what type of element forms cations: metal, metalloid, non-metal?
Answer: Metals
Explanation:
When an atom accepts an electron negative charge is created on atom and is called as anion.
When atom loses an electron positive charge is created on atom and is called as cation.
The cation is formed by loss of electrons by metals and anions are formed by gain of electrons by non metals.
Thus metals form cations.
Carbon dioxide goes into a plant's leaves when it's photosynthesizing is this an example of diffusion or osmosis or neither?
Answer:
diffusion
Explanation:
plants have stomata at the bottom of their leaves. these allow for CO2 to diffuse in and out of the plant.
Look at the images of Mars below. choose three features from the images and explain why they provide evidence thatt there is or was water on Mars. NEED HELP ASAP. (Will mark Brainlist)
Answer:
Spot (4) Has evidence that there were waves here at some point. It looks as if the sand/surface debris was moved back and forth, creating this pattern in the sand. Spots (5) and (7) show evidence of water erosion. The smooth edges of both hills mean that water once flowed through that area, carrying little pebbles and rocks that gradually shaped and smoothed those mounds. An example for this would be how there are smooth areas in the Grand Canyon where scientists have concluded that some, if not all, of the Grand Canyon was formed by flowing water. "Rapid uplift, cracking, and surface drainage of receding floodwaters provide both the path and the necessary volume of water to quickly carve out Grand Canyon," says scholars on icr.org.
Explanation:
Water Erosion exists.
Concerning the structure of molecules, the biggest factor that affects solubility is
Your answer:
A. polarity
B. tarnish
C. mixiness
Answer:
A
Explanation:
Have a nice day
If you had 3.6 moles of AI(NO3)3, how many grams would you expect to have?
766.7856 g
Molecular weight of Aluminium Nitrate is 212.996 g/mol. 3.6 moles of Aluminium Nitrate is: 212.996 × 3.6 = 766.7856
Liquid hexane e (CH 3 (CH 2 ) 4 CH 3 ) will react with gaseous oxygen (O 2 ) to produce gaseous carbon dioxide (CO 2 ) and gaseous water (H 2 O) . Suppose 2.59 of hexane is mixed with 2.9 of oxygen. Calculate the maximum mass of water that could be produced by the chemical reaction. Be sure your answer has the correct number of significant digits .
Answer:
Explanation:
Hi I'm so sorry hope you have a good day
What is the element that lies in group no 29?
A friend tells you that's after a candle burn there is less matter than before the flame was lit is your friend correct explain why or why not
Answer:
See explanation
Explanation:
The law of conservation of matter states that "matter cannot be created or destroyed. In a physical change, substances can change form, but the total mass remains the same."(Virginia)
Hence, the quantity of matter present before and after the candle burn must remain the same in accordance with this law stated above.
Hence, my friend was not correct.