Answer:
18.18C
Explanation: Write whats below to show your work :D
m=55
C=0.45
Q=450zj
ch.temp=?
Q=mct
450 = (55)(.45)T
450 = 24.75
/24.75 = /24.75 (cancels out)
18.18 is the answer
Hope this helps! did it with my teacher.
A sample of an unknown compound is vaporized at 130°C . The gas produced has a volume of 1280mL at a pressure of 1.00 atm and it weighs 4.03g
Assuming the gas behaves as an ideal gas under these conditions, calculate the molar mass of the compound. Round your answer to 3 significant digits.
Calculate the enthalpy change for the photosynthesis of gluclose
Answer:
jhdgafhgafhagfhafg
Explanation:
A mixture of NO2 and N2O4 gas is at equilibrium in a closed container. These gases react with the equation 2NO2 ⇌ N2O4. What will happen if the size of the container is increased?
Answer:
Equilibrium will shift leftwards towards NO2.
Explanation:
Hello there!
In this case, according to the Le Cha telier's principle, it is possible to realize that the increase of the volume turns out in the shift towards the most of the gaseous moles are in; in such a way, for the given chemical reaction, we can notice how NO2 (reactant side) has the most of the moles (2 moles in comparison to 1 mole of N2O4); and therefore, by increasing the volume, the equilibrium will shift to it, it means leftwards.
Best regards!
1120 KG car is traveling with a speed of 40 M/S find its energy
Answer:
252 Joules
Explanation:
I thin k this is right, im so sorry if not!! :)
what happened to the sound as vibration of an object increase in strength
Answer:
A.The sound becomes louder.
And
C.The sound waves get further.
Explanation:
Louder the sound it will travel long.
3.
The color of the powdered form of a mineral is called
O fracture
O cleavage
O luster
O streak
Answer:
D. Streak.
Explanation:
A mineral, in simple terms, can be defined as a solid inorganic substance that occurs in a pure form with a specific crystal structure. A mineral is identified based on its physical properties which include luster, color, streak, crystal shape, etc.
The color of the powdered form of a mineral is called a streak. A streak is a useful property in distinguishing sulfide and oxide minerals. To check the color of a mineral, it is rubbed against the surface of a ceramic streak plate or a piece of unglazed ceramic. In its finely powdered form, a mineral is easy to identify.
Therefore, option D is correct.
How many moles of hydrogen are needed to react with 0.234 mol oxygen according to this equation? 2H2 + O2 -> 2H2O
The number of moles of hydrogen to be 0.468.
The balanced chemical equation :
2H₂ + O₂ → 2H₂O
This implies that 2 moles of hydrogen and one mole of oxygen are required to produce 2 moles of water.
or
Thus molar ratio of ( H₂ : O₂)= 2 : 1.
So, it requires double the moles of oxygen to get the required moles of water.
Number of moles of oxygen= 0.234 mol
So following the molar ratio concept:
We will get:
The number of moles of hydrogen to be 0.468.
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After you compute the
of titrant
NaOH, you will copy that value into the row of the
data table for the
of analyte HCI.
Answer:
The first one is moles and so is the second one.
Explanation:
Answer:
1) Moles
2) Moles
Explanation:
On Edge
Can someone please help with this !!!!
What is the total number of atoms in ammonium hydroxide?
I will give Brainliest! :)
Answer:Ammonia is a compound that contains one nitrogen atom and three hydrogen atoms. Ordinarily having a characteristic of a pungent and gaseous compound.
Elemet: Hydrogen, Symbol: H, # of Atoms:5
Elemet:Nitrogen, Symbol: N, # of Atoms:1
Elemet:Oxygen, Symbol: O, #of Atoms:1
Explanation:
The number of atoms presennt in one mole of ammonium hydroxide is 6.02 * 10^23 atoms.
What is the mole?The mole refers to the amount of a substance that can be used as a reference. According to Avogadro, one mole of a substance contains 6.02 * 10^23 atoms, molecules, ions etc.
In that case, we can say that the number of atoms presennt in one mole of ammonium hydroxide is 6.02 * 10^23 atoms.
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What is the pigment that absorbs light energy and make glucose?
Answer: chlorophyll
Explanation: Photosynthetic cells contain chlorophyll and other light-sensitive pigments that capture solar energy.
I need help
Balance the chemical equation
Answer:
Iwill add 2 for Na and 2 for NaCl so the answer is "C"
S- 2500m
112
VODO
4. Two waves are traveling in the same medium with a speed of 340 m/s. What is the difference in
frequency of the waves if the one has a wavelength of 5.0 m and the other has a wavelength of
0.2 m?
Answer:
1632 Hz
Explanation:
We'll begin by calculating the frequency of each wave. This can be obtained as follow:
1st wave:
Velocity (v) = 340 m/s.
Wavelength 1 (λ₁) = 5 m
Frequency 1 (f₁) =?
v = λ₁f₁
340 = 5 × f₁
Divide both side by 5
f₁ = 340 / 5
f₁ = 68 Hz
2nd wave:
Velocity (v) = 340 m/s.
Wavelength 2 (λ₂) = 0.2 m
Frequency 2 (f₂) =?
v = λ₂f₂
340 = 0.2 × f₂
Divide both side by 0.2
f₂ = 340 / 0.2
f₂ = 1700 Hz
Finally, we shall determine the difference in the frequency of both waves.
This can be obtained as follow:
Frequency 1 (f₁) = 68 Hz
Frequency 2 (f₂) = 1700 Hz
Difference =?
Difference = f₂ – f₁
Difference = 1700 – 68
Difference = 1632 Hz
Which of these actions is an example of erosion caused by gravity?
A.
Constant freezing and thawing water forming a hole in an asphalt road
B.
Pieces of rock breaking off and falling from a mountain top
C.
Chemicals in the air dissolve minerals in a marble statue
D.
Plant roots widening cracks in a large granite rock
Answer:
The answer is a
Explanation:because yes
Answer: The answer is B.
Explanation: The rocks falling off is caused by gravity. Other options don't include effects of gravity; Therefore, B is correct.
What needs to be taken into consideration when increasing either the acid or base concentration in order to increase the buffering capacity of a solution?
The more concentrated the buffer solution, the greater its buffer capacity.
What is an acid?An acid is any substance that in water solution tastes sour, changes blue litmus paper to red, reacts with some metals to liberate hydrogen, reacts with bases to form salts, and promotes chemical reactions.
The more concentrated the buffer solution, the greater its buffer capacity.
If the buffer capacity is 10 times larger, then the buffer solution can absorb 10 times more strong acid or base before undergoing a significant change in pH.
Hence, we need to take this into consideration when increasing either the acid or base concentration in order to increase the buffering capacity of a solution.
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1) If a gas occupies 2.60 liters at a pressure of 1.00 atm, what will be its volume at a
pressure of 3.50 atm?
Use Boyle's Law: P₁V₁ = P₂V₂. Since pressure and volume are inversely related and we're increasing the pressure, we should expect the new volume to be less than 2.60 liters.
Here, P₁ = 1.00 atm, V₁ = 2.60 liters, and P₂ = 3.50 atm; we want to find the new volume, V₂, at P₂. We can modify the equation to solve for V₂:
V₂ = P₁V₁/P₂ = (1.00 atm)(2.60 L)/(3.50 L) = 0.714 L
So the volume of the gas at a pressure of 3.50 atm will be 0.743 L.
4. Write the chemical formula for each of the following:
Calcium oxide - Copper (II) nitrate - Ammonium chloride-
Magnesium sulphate - Copper (1) oxide - Calcium chloride.
Answer:
Calcium oxide: CaO
Copper (II) nitrate: Cu(NO₃)₂
Ammonium chloride: NH₄Cl
Magnesium sulfate: MgSO₄
Copper (I) oxide: Cu₂O
Calcium chloride: CaCl₂
Explanation:
Hello there!
In this case, according the IUPAC rules for naming this inorganic salts, whereas calcium, copper (II), ammonium, magnesium and copper (I) are the cations and oxide, nitrate, chloride and sulfate are the anions, we proceed as follows:
Calcium oxide: CaO
Copper (II) nitrate: Cu(NO₃)₂
Ammonium chloride: NH₄Cl
Magnesium sulfate: MgSO₄
Copper (I) oxide: Cu₂O
Calcium chloride: CaCl₂
Best regards!
Consider the system below at equilibrium at 200oC. 2Cl2 (g) + 2H2O (g) + heat ↔ 4HCl (g) + O2 (g) Which response contains all the stresses listed that will result in a shift of equilibrium so that more HCl is produced when equilibrium is re-established, and no stresses that will not? I. adding some Cl2 II. raising the temperature at constant pressure III. decreasing the volume at constant temperature
Answer:
The answers are in the explanation
Explanation:
Based on Le Châtelier's principle, when a system in equilibrium change a condition, the system will produce a reaction in order to subtract the effect of the initial change.
For the equilibrium:
2Cl2 (g) + 2H2O (g) + heat ↔ 4HCl (g) + O2 (g)
I. Adding some Cl₂. Will produce the equilibrium shifts to the right in order to decrease the concentration of Cl₂ and produce more HCl.
II. raising the temperature at constant pressure. As the system requires heat to produce the reaction, the system will shift to the right in order to decrease the heat and produce more HCl
III. decreasing the volume at constant temperature. As the volume decreases, the pressure increases. In the left, there are 4 moles of gas and in the right there are 5. When the pressure increases the system will try to decrease the moles of gas in order to decrease the pressure. THat means the system will shift to the left in order to produce more Cl₂
Can someone help me with this
Answer: A
Explanation:
Answer:
B
Explanation:
BBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBB I LIKE B it's B though gl on the rest.
PLEASE HELP ME PLEASEEE AND QUICK.
NO TROLL ACCOUNT AND POSTING A LINK TO NO WHERE, PLEASE. DONT. UR WASTING MY TIME.
SOMEONE PLEASE BE NICE.
Please answer ALL THREE if u can, thank you so so so so much!!!
Answer:
Eeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeee
Explanation:
A correct statement of Henry's law is: a. The concentration of a gas in solution is inversely proportional to temperature. b. The concentration of a gas in solution is directly proportional to the mole fraction of solvent. c. The concentration of a gas in solution is independent of pressure. d. The concentration of a gas in a solution is inversely proportional to pressure. e. None of these.
Answer:
e. None of these.
Explanation:
Hey there!
In this case, since the Henry's law is defined in terms of pressure, henry's constant and pressure, as shown below:
[tex]C=K_H*P[/tex]
Whereas C is the concentration, KH the Henry's constant and P the pressure, we infer that the concentration of a gas solution is directly proportional to the pressure, which is not the group choices, therefore, the answer is e. None of these.
Best regards!
Which is an application of genetic engineering?
A.
destroying all bacteria
B.
creating synthetic insulin
C.
producing cells from nonliving material
D.
preventing weeds from spreading to farmland
Answer:
B. Creating synthetic insulin
Explanation:
In medicine, genetic engineering has been used to mass-produce insulin, human growth hormones, Follistim (for treating infertility), human albumin, monoclonal antibodies, antihemophilic factors, vaccines, and many other drugs. In research, organisms are genetically engineered to discover the functions of certain genes.
What is the majority of water on earth's surface located.
A. Lakes
B. Rivers
C. Glaciers
D. Oceans
Answer:
oceans
Explanation:
Answer:
D. Ocean
Explanation:
oceans are the majority water on earth's surface located. They hold 97% of earths water.
Using table 3, predict the molecular geometry of the following molecules:
a. The central atom bonded to four substituent atoms and having no lone pair.
b. The central atom bonded to three substituent atoms and having one lone pair.
c. The central atom bonded to two substituent atoms ảnd having
one lone pair.
d. The central atom bonded to two substituent atoms and having no lone pair.
Answer:
see explanations
Explanation:
a. The central atom bonded to four substituent atoms and having no lone pair.
This is an AX₄ geometry => tetrahedron
b. The central atom bonded to three substituent atoms and having one lone pair.
This is an AX₃E geometry => pyramidal
c. The central atom bonded to two substituent atoms ảnd having
one lone pair.
This is an AX₂E geometry => bent angular
d. The central atom bonded to two substituent atoms and having no lone pair.
This is an AX₂ geometry => linear
_______________________________
Based upon the VSEPR Theory there are 6 parent geometry configurations and associated derived geometries.
Parent geometries => Derivatives => Examples
linear => AX₂ (BeCl₂) trigonal planer => AX₃ (BH₃) => AX₂E (Bent) (:SnCl₂)tetrahedral => AX₄ (CH₄) => pyrimidal AX₃E (NH₃) => Bent AX₂E₂ (H₂O)trigonal bipyrimidal => AX₅ (PCl₅) => seesaw AX₄E (:SF₄) => T-shaped AX₃E₂ (ClF₃ (T-shaped) => linear AX₂E₃ (XeF₂)octahedral => AX₆ (SF₆) => sqr pyramid AX₅E (IF₅) => sqr planar AX₄E₂ (XeF₄) pentagonal bipyrimidal => AX₇ (ClF₇)For graphic images of each geometry do an internet search for 'molecular geometry'.
17.4. A gas is found to have a density of 8.00 g/L. Find the volume of the gas in a balloon that
has a mass of 24 grams.
A. 192 liters
B. 3 liters
C. 0.3 liters
D. 32 liters
what is the answer?
Answer:
3 litersExplanation:
The volume of a substance when given the density and mass can be found by using the formula
[tex]volume = \frac{mass}{density} \\[/tex]
We have
[tex]volume = \frac{24}{8} = 3 \\ [/tex]
We have the final answer as
3 litresHope this helps you
How do humans influence genetic outcomes in artificial selection and what impacts does this have on society?
Answer:
In artificial selection, humans have the capacity to influence certain characteristics of organisms by selective breeding. One can choose desired parental traits determined by genes, which are then passed on to offspring.
Which equation represents a double replacement reaction? A) 2Al(s) + 6HCl(aq) → 2AlCl3(aq) + 3H2(g) B) 2Al(s) + 3Cl2(g) - 2AlCl3(s) C) 2AlCl3(s) + 2Al(s) + 3Cl2(g) D) AlCl3(aq) + 3KOH(aq) - Al(OH)3(s) + 3KCl(aq)
Answer:
D) AlCl₃(aq) + 3 KOH(aq) → Al(OH)₃(s) + 3 KCl(aq)
Explanation:
Which equation represents a double replacement reaction?
A) 2 Al(s) + 6 HCl(aq) → 2 AlCl₃(aq) + 3 H₂(g)
No, this is a single replacement reaction, in which Al replaces H in its acid.
B) 2 Al(s) + 3 Cl₂(g) → 2 AlCl₃(s)
No, this is a synthesis reaction, in which two simple substances combine to form a compound.
C) 2 AlCl₃(s) → 2 Al(s) + 3 Cl₂(g)
No, this is a decomposition reaction, in which a compound decomposes into simple substances.
D) AlCl₃(aq) + 3 KOH(aq) → Al(OH)₃(s) + 3 KCl(aq)
Yes, this is a double replacement reaction, in which both reactants exchange their cations and anions.
how many molecules are in 4.08 moles of CCL4
What is the final volume of a 3.5M NaOH solution if the original solution was 20mL of a 7.00M NaOH solution
Answer:
0.04 L (or 40 mL)
Explanation:
The dilution equation is: [tex]M_{s} V_{s} = M_{d} V_{d}[/tex]
[tex]M_{s}[/tex] = the molarity of the sock solution
[tex]V_{s}[/tex] = the volume of the sock solution
[tex]M_{d}[/tex] = the molarity of the diluted solution
[tex]V_{d}[/tex] = the volume of the diluted solution
We are given the original, or stock, solution, which is [tex]M_{s} = 7.00 M NaOH[/tex], and [tex]V_{s} = 0.02 L (20 mL)[/tex]. We are also given the final molarity, which is: [tex]M_{d} = 3.5 M NaOH[/tex].
So, plugging our given into the dilution equation, results in:
[tex]7.00 M * 0.02 L = 3.5M * V_{d}[/tex] (divide both sides by 3.5 M, in order to get [tex]V_{d}[/tex] by itself).
[tex]\frac{7.00 M * 0.02 L}{3.5M} = V_{d}[/tex]
[tex]V_{d} = 0.04 L (or 40 mL)[/tex]
So, the final volume of a 3.5 M NaOH solution, with an original solution of 20 mL of a 7.00 M NaOH solution, is 0.04 L (or 40 mL)
Hopefully this helped. Good luck!
4. The following occurs when heat energy is removed: Gas --A-> Liquid-B--> Solid.
What would be the phase change for A and B respectively?
A. Condensation, freezing
C. Condensation, melting
B. Melting, evaporation
D. Sublimation, deposition
Answer: The phase change for A and B respectively is condensation, freezing.
Explanation:
A process in which gaseous state of a substance converts into liquid state is called condensation.
For example, conversion of steam into water.
A process in which liquid state of a substance converts into solid state is called freezing.
For example, conversion of liquid water into ice.
Thus, we can conclude that the phase change for A and B respectively is condensation and freezing.
Condensation and freezing would be the phase change for A and B respectively.
What is Freezing?This is the process in which a liquid becomes solid and is mostly caused by exposure to cool temperatures.
Gaseous substances also have the ability to become liquids through the process known as Condensation. This therefore makes option A the most appropriate choice.
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