Answer:
The ratio of f at the higher temperature to f at the lower temperature is 5.356
Explanation:
Given;
activation energy, Ea = 185 kJ/mol = 185,000 J/mol
final temperature, T₂ = 525 K
initial temperature, T₁ = 505 k
Apply Arrhenius equation;
[tex]Log(\frac{f_2}{f_1} ) = \frac{E_a}{2.303 \times R} [\frac{1}{T_1} -\frac{1}{T_2} ][/tex]
Where;
[tex]\frac{f_2}{f_1}[/tex] is the ratio of f at the higher temperature to f at the lower temperature
R is gas constant = 8.314 J/mole.K
[tex]Log(\frac{f_2}{f_1} ) = \frac{E_a}{2.303 \times R} [\frac{1}{T_1} -\frac{1}{T_2} ]\\\\Log(\frac{f_2}{f_1} ) = \frac{185,000}{2.303 \times 8.314} [\frac{1}{505} -\frac{1}{525} ]\\\\Log(\frac{f_2}{f_1} ) = 0.7289\\\\\frac{f_2}{f_1} = 10^{0.7289}\\\\\frac{f_2}{f_1} = 5.356[/tex]
Therefore, the ratio of f at the higher temperature to f at the lower temperature is 5.356
Balance the following reaction _Na+_O2=Na2O
Which element is considered a malleable substance?
a) sulfur b) radon c) hydrogen d) gold
Answer:
Gold
hope this helps :)
Answer: Gold
Explanation: Gold is called a heavy metal because of its high density, which comes from the fact that each of its atoms is individually very heavy. ... In contrast, gold atoms slide past each other relatively easily, which makes the metal soft and malleable.
A sample of 7.34 g of solid calcium hydroxide is added to 34.5 mL of 0.380 M Aqueous hydrochloric acid.Write the balanced chemical equation for the reaction. Physical states are optional.
Answer: [tex]Ca(OH)_2(s)+2HCl(aq)\rightarrow CaCl_2(aq)+2H_2O(l)[/tex]
Explanation:
A double displacement reaction is one in which exchange of ions take place. The salts which are soluble in water are designated by symbol (aq) and those which are insoluble in water and remain in solid form are represented by (s) after their chemical formulas.
A double displacement reaction in which one of the product is formed as a solid is called as precipitation reaction.
The balanced chemical equation is:
[tex]Ca(OH)_2(s)+2HCl(aq)\rightarrow CaCl_2(aq)+2H_2O(l)[/tex]
Which will have the MOST kinetic energy?
A} A puck traveling at 10 mph C} A puck traveling at 40 mph
B} A player traveling at 10mph D}A player traveling at 40 mph
Answer:
should be B
because the player has more mass than the puck
Explanation:
What happens to matter when it’s burned?well mayb its distroying the matter
True or False: The ocean is an example of a carbon reservoir (carbon sink).
True
False
Answer:
A TRUEEEEEEEE
Explanation:
A container of water and an equal-sized container of oil are heated at the same rate. After several minutes, the temperature of the oil has risen 20 degrees C, but the temperature of the water has only increases by 8 degrees C. What explains this?
Question 6 options:
Heat moves from the water to the oil.
It takes more energy to increase the temperature of water than to increase the temperature of oil
The water contains more atoms, so it has more thermal energy
More heat was added to the oil than to the water.
Answer: It takes more energy to increase the temperature of water than to increase the temperature of oil.
Explanation:
yes
What can you conclude about the above reaction? * (1 Point)
•It needs air
•It releases heat.
•It releases light
•It absorps heat
A student burned her magnesium sample according to the procedure and obtained a light gray product. Since the crucible looked dirty anyway, she skipped the steps to convert the Mg3N2 contamination to MgO, weighed the gray sample, and calculated the mass of her product. Was her resulting mass likely to be higher or lower the expected
Answer:
The resulting mass will be higher than expected
Explanation:
We have to keep this in mind; When magnesium is being burnt in air, two reactions are taking place. The first one is;
2Mg(s) + O2(g) ------> MgO(s) -------1
And
3Mg(s) + N2(g) -------> Mg3N2(s) ---------2
Now, if the steps that should be taken to convert Mg3N2 to MgO are not taken, the reaction is much quicker but a higher mass of solid is obtained than what was expected.
This higher mass of solid obtained owes to the fact that Mg3N2 from reaction 2 was not converted to MgO leading to contamination of the product.
For each element write the Noble gas notation
1. Oxygen
2. Calcium
3. Hydrogen
4. Copper
5. Neon
6. Cesium
Answer:
neon is the Noble gas but I have not studied this much
How much DNA can be extracted from an onion
how many molecules of sugar are in 4.67 miles of sugar?
Would you expect the amount of heat (q, in J) released or absorbed for the dissolution of 4 g of NH4NO3(s) in 50.0 g of water to be greater than, less than, or equal to, the amount of heat released or absorbed for the dissolution of 2 g of NH4NO3(s) in 50.0 g of water
Answer:
Greater
Explanation:
This is because , 4 g of NH4NO3(s) contains more number of moles than 2 g of NH4NO3(s). Since the amount of heat (q, in J) released or absorbed for the dissolution is measured in kJ/mol, the higher the number of moles , the higher the amount of energy released. Since 4 g of NH4NO3(s) contains more number of moles than 2 g of NH4NO3(s), it will thus release or absorb more heat. So, the amount of heat is greater.
Since 4 g of NH4NO3(s) contains more moles than 2 g of NH4NO3(s), it will thus absorb more heat showing that the amount of heat is greater.
Balancing chemical reactionFrom the given information, we are to determine whether the amount of heat released or absorbed is greater or lesser.
From the question, 4 g of NH4NO3(s) contains more moles than 2 g of NH4NO3(s).We must also know that the higher the number of moles of a compound, the higher the amount of energy releasedSince 4 g of NH4NO3(s) contains more moles than 2 g of NH4NO3(s), it will thus absorb more heat showing that the amount of heat is greater.
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Help plzzz Convert 6.1 ks to s.
Answer: 6100 seconds
Explanation: 6.1 Kiloseconds = 6100 Seconds
Converting 6.1 Kilo seconds is 6100 seconds.
What are seconds?The unit of time measurement used by the International System of Units (SI) is the second (s or sec). Any specific period of time that is used to measure or represent duration on a regular basis is referred to as a unit of time.
The second is the fundamental unit of time in the International System of Units and by extension. There are different units of time. They are hour, second, and minute. 1 minute is equal to 60 seconds. 60 minutes into one hour, and 24 hours equals one day.
The unit can be converted into different units as 1 ks equals 1000 seconds. To convert a unit first determine the unit, then match the unit which others, and then know the units.
Thus, the 6.1 Kilo seconds is 6100 seconds.
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Question 3 (5 points)
Potassium chlorate decomposes into potassium chloride and oxygen gas according to
the following equation:
2 KCIO3 --> 2 KCl + 3 02
Use the equation above to answer the questions that follow:
How many grams of oxygen will be produced from the decomposition of 425 g of
potassium chlorate?
Do not put the answer in scientific notation. Do not include the substance as part of
your unit. Units should be all lowercase letters and singular (not plural) and no
spaces among units. You will choose from the following units:
Answer:
332.918g O2
Explanation:
I'm having some issues with the work however, your final answer should be 332.918g O2
Hope this helped!
2. How might this population suddenly increase? How might this affect the ecosystem? (for tropical savannah.)
Explanation:
it can suddenly increase when more and more people have babies and the infant rate goes up. and how it might affect the ecosystem is the pollution that people give off.
Answer:
Explanation:
Due to less predators in the Savannah/habitat, the population could unexpectedly grow. This will have an impact on the environment because it will give rise to more prey as there will be fewer predators. If too many herbivores are present on one feeding site, competition for food will occur. If there are more plants in an area than normal, it can increase the population of animals that consume the plant. If the population of one animal rises, the population of animals that consume that animal could also rise.
Population growth isn't always good. A population may often grow too big to sustain the climate. Other modifications in limiting variables can cause a population to decline. The population will decrease if a population becomes diseased, and the population of animals that consume the diseased animals will decrease as well. Populations in nature typically balance themselves. Sometimes, they can't always restore a natural balance as man affects populations.
Classify each of the following as elements (E), compounds (C) or Mixtures (M). Write the letter X if it is none of these. ______Diamond (C) ______Sugar (C6H12O6) _______Milk ____Iron (Fe) _____Air ______Sulfuric Acid (H2SO4) _______Gasoline (hydrocarbons) _____Electricity ______Krypton (K) ___Bismuth (Bi) ___Uranium (U) _______Kool-Aid ___Water (H2O) _____Alcohol (CH3OH) ______Pail of Garbage ___Ammonia (NH3) ___Salt (NaCl) ______Energy ______Gold (Au) _______Wood _______Bronze _______Ink ______Pizza ______Dry Ice (CO2) ______Baking Soda(sodium bicarbonate)
Answer:
Diamond - E
Sugar- C
Milk - M
Iron- E
Air- M
Sulfuric Acid- C
Gasoline - M
Electricity- X
Krypton- E
Bismuth - E
Uranium - E
Kool-Aid -M
Water - C
Alcohol - C
Pail of Garbage - M
Ammonia - C
Salt - C
Energy - X
Gold - E
Wood - M
Bronze - M
Ink - M
Pizza - M
Dry Ice - C
Baking Soda - C
Explanation:
An element is the smallest part of a substance that is capable of independent existence. An element cannot be broken down into any other substance. Krypton, Bismuth etc are all elements.
A compound is a combination of two or more elements which are chemically combined together e.g NH3, CO2 etc.
A mixture is any combination of substances that are not chemically combined together. E.g Pizza, milk etc
Which are characteristics of electromagnetic waves? Check all that apply.
travel in straight lines and can bounce off surfaces
travel through space at the speed of light
travel only through matter
travel only through space
can bend around objects
move by particles bumping into each other
move by the interaction between an electric field and a magnetic field
"The characteristics of electro-magnetic travel in straight lines and have the ability to bounce off objects. Traveling at the speed of light can bend around moving objects due to the interplay of an electric and magnetic field."
What is electromagnetic wave?
Electromagnetic waves, or EM waves, are formed when an electric field as well as a magnetic field vibrate together. EM waves, in other terms, are magnetic and electric fields that oscillate.
What is Electromagnetic radiation?
Electromagnetic radiation is made up of electromagnetic field waves that travel over space and convey electromagnetic radiant energy. Radio waves, microwaves, infrared, light, ultraviolet, X-rays, and gamma rays are all examples. The electromagnetic spectrum includes all of these wavelengths.
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How many moles of a gas would be held by a 6 L container of nitrogen gas at 2 atm and 300 Kelvin?
Answer:
I think you would have to multiply 6 times 2, which it equals 12. And then just divide it by 300, and that's your answer. Hope I was able to help!
Explanation: Have a good day!
What is the total pressure in atmosphere (atm) of a gas mixture containing argon gas at 0.28 atm, helium gas at 760 mm Hg, and nitrogen gas at 760 torr?
Answer:
I dont know, sorry!
You have a 95% EtOH stock solution and want a 70% EtOH solution for sterilization purposes. If you want a final volume of 250 mL, how much 95% EtOH must you add, and how much water must you add
Answer:
65.8mL of water and 184.2mL of the 95% EtOH stock solution must be added.
Explanation:
To solve this question we need to find hoy many times the 95% EtOH must be diluted to obtain a 70% EtOH solution. That is:
95% / 70% = 1.357 times the solution must be diluted.
If we want to make 250mL of the diluted solution, the amount of 95% that must be added is:
250mL / 1.357 times =
184.2mL of the 95% solution must be added
And of water:
250mL - 184.2mL = 65.8mL of water
A gas occupies a volume of 50.0 mL at 27°C and 630 mmHg. At what
temperature, in *C, would the pressure be 101.3 kPa if the volume remains constant?
Answer:
T2+500k - 273 = 223 *C
Explanation:
Aqueous hydrochloric acid will react with solid sodium hydroxide to produce aqueous sodium chloride and liquid water . Suppose 14. g of hydrochloric acid is mixed with 6.55 g of sodium hydroxide. Calculate the minimum mass of hydrochloric acid that could be left over by the chemical reaction. Round your answer to significant digits.
Answer:
8.02 g of HCl could be left over by the chemical reaction
Explanation:
We propose the reaction:
HCl(aq) + NaOH (s) → NaCl (aq) + H₂O (l)
Ratio is 1:1. First of all, we determine the moles of reactants:
14 g . 1mol / 36.45g = 0.384 mol of acid
6.55 g. 1mol / 40g = 0.164 mol of base
If a determined mass of HCl, could be left; this means that the acid is the excess reagent.
For 0.164 moles of NaOH, we need 0.164 moles of HCl.
As we have 0.384 moles, (0.384 - 0.164) = 0.220 moles of acid are left over in the reaction. We convert the moles to mass:
0.220 mol . 36.45 g /1mol = 8.02 g
magnesium and copper react with dilute acids to make salts and hydrogen gas
True
False
Answer:
True
Explanation:
magnesium and copper react with dilute acids to make salts and hydrogen gas
Natural gas is a mixture of many substances, primarily CH4, C2H6, C3H8, and C4H10. Assuming that the total pressure of the gases is 1.48 atm and that their mole ratio is 94 : 4.0 : 1.5 : 0.50, calculate the partial pressure in atmospheres of each gas:
Answer:
SEE EXPLANATION
Explanation:
We have the mole ratio as; 94 : 4.0 : 1.5 : 0.50
This implies that the total number of natural gas is; 94 + 4.0 + 1.5 + 0.50 = 100 moles
Recall that partial pressure = mole fraction * total pressure
For CH4 = 94/100 * 1.48 atm = 1.39 atm
For C2H6 = 4/100 * 1.48 atm = 0.0592 atm
For C3H8 = 1.5/100 * 1.48 atm = 0.0222 atm
For C4H10 = 0.5/100 * 1.48 atm = 0.0074 atm
The_____ point of water is 100°C
Answer:
Boiling
Explanation:
three molecules of oxygen react with four molecules of hydrogen to produce water molecules write a balanced chemical equation
Answer:
ExpC
H
4
+
2
O
2
→
C
O
2
+
2
H
2
O
This is the balanced reaction equation for the combustion of methane.
Explanation:
The Law of Conservation of Mass basically states that matter can neither be created nor destroyed. As such, we must be able to show this in our chemical reaction equations.
If you look at the equation above, you'll see an arrow that separates the reaction equation into two parts. This represents the direction of the reaction.
To the left of the arrow, we have our reactants.
To the right of the arrow, we have our products.
The quantity of each individual element in the left must equal the quantity of each individual element in the right.
So if you look below, you'll see the unbalanced equation, and I'll try to explain how to balance the reaction.
C
H
4
+
O
2
→
C
O
2
+
H
2
O
Our reactants in this equation are
C
H
4
and
O
2
.
Our next step is to break these down into individual atoms.
We have:
1 C atom, 4 H atoms & 2 O atoms.
If you're confused by this, look to see the little number to the bottom right of each element, the subscript, and it tells you how many of each atom are in the molecule. Make sense?
Now we look to the other side of the equation.
Here we see our products are
C
O
2
+
H
2
O
Again, we break these down into individual atoms again.
We have:
1 C atom, 2 H atom, 3 O atom
6. The human arm, a bat's wing, a whale's flipper, and a horse's
foreleg are examples of
A. Analogous Structures
B. Homologous Structures
C. Vestigial Structures
D. Fossils
I
How does an atom become a positively charged ion?
18 gm glucose is dissolved in 90 gm of water. The relative lowering of vapour pressure is equal to
Answer:
0.02
Explanation:
Molecular mass of water= 2×1+1×16=18g
=2×1+1×16=18g
For 90g178.2g water nₐ =5
Molecular mass of glucose 6×12+12×1+6×16=180g
For 18g glucose nb =0.1
Now, X B = 0.1 / 0.1 + 5=0.0196 ~0.02