Answers
Answer:
1. The final temperature of the metal is 111 °C.
2. The change in the temperature of the water is 6.2 °C
3. The change in the temperature of the metal is 40.6 °C.
Explanation:
From the question given above, the following data were obtained:
Initial temperature of metal (Tₘ₁) = 70.4 °C
Initial temperature of water (Tᵥᵥ₁) = 23.6 °C
Equilibrium temperature (Tₑ) = 29.8 °C
1. Determination of the final temperature of metal.
We'll begin by calculating the change in temperature of the metal. This can be obtained as follow:
Initial temperature of metal (Tₘ₁) = 70.4 °C
Equilibrium temperature (Tₑ) = 29.8 °C
Change in temperature of metal (ΔTₘ) =?
ΔTₘ = Tₘ₁ – Tₑ
ΔTₘ = 70.4 – 29.8
ΔTₘ = 40.6 °C
Finally, we shall determine the final temperature of the metal. This can be obtained as follow:
Initial temperature of metal (Tₘ₁) = 70.4 °C
Change in temperature of water (ΔTₘ) = 40.6 °C
Final temperature of metal (Tₘ₂) =?
40.6 = Tₘ₂ – 70.4
Collect like terms
40.6 + 70.4 = Tₘ₂
111 = Tₘ₂
Tₘ₂ = 111 °C
Thus, the final temperature of the metal is 111 °C
2. Determination of the change in the temperature of the water.
Initial temperature of water (Tᵥᵥ₁) = 23.6 °C
Equilibrium temperature (Tₑ) = 29.8 °C
Change in temperature of water (ΔTᵥᵥ) =?
ΔTᵥᵥ = Tₑ – Tᵥᵥ₁
ΔTᵥᵥ = 29.8 – 23.6
ΔTᵥᵥ = 6.2 °C
Therefore, the change in the temperature of the water is 6.2 °C
3. Determination of the change in the temperature of the metal.
The change in the temperature of the metal is 40.6 °C.
Please solution 1 above for explanation.
Answer:
29.8 C
6.2 C
-40.6 C
:)
Explanation:
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write the states of matter and balanced equations
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Answers
The states of matter and balanced equations are as follows:
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Au(C₂H₃O₂)₂ (s) --> Au (s) + 2CO₂ (g) + 3H₂O (g)
Aluminum wire is added to the solution of nickel (ll) nitrate:
Al (s) + Ni(NO₃)₂ (aq) --> Al(NO₃)₃ (aq) + Ni (s)
A solution of sodium phosphate is added to the solution of ammonium chromate:
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Cathode: 2 Ag+ (aq) + 2 e- → 2 Ag (s). Anode: 2 H+ (aq) → H2 (g) + 2 e-.
What is cathode ?
A cathode is an electrode in an electrical circuit from which electrons flow out. It is usually made of metal and is negatively charged. Cathodes are commonly used in electronic devices such as batteries, lamps, and vacuum tubes. In a battery,
the cathode is the terminal which provides a negative charge and is usually connected to the negative terminal of the battery. In a vacuum tube, the cathode is the source of electrons which flow through the tube to the anode, which is the positive terminal.
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Matthew added a sample of sodium chloride to water and
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pH
Answers
Answer:
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Explanation:
The ph is just 14-pOH so
14-2.55=ph=11.45
A 0.982-g sample of an unknown gas exerts a pressure of 700 mm Hg in a 450-cm3 container at 23oC. Calculate the molar mass of this gas. [1cm3 = 1mL; 1000mL = 1L]
Answers
Answer:
57.4 g/mol
Explanation:
Step 1: Convert 450 cm³ to L
We will use the conversion factors 1 cm³ = 1 mL and 1000 mL = 1 L.
450 cm³ × 1 mL/1 cm³ × 1 L/1 mL = 0.450 L
Step 2: Convert 23 °C to Kelvin
We will use the following expression.
K = °C + 273.15 = 23 + 273.15 = 296 K
Step 3: Calculate the number of moles of the gas
We will use the ideal gas equation.
P × V = n × R × T
n = P × V / R × T
n = 700 mmHg × 0.450 L / (62.4 mmHg.L/mol.K) × 296 K = 0.0171 mol
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0.982 g of the gas correspond to 0.0171 moles.
M = 0.982 g/0.0171 mol = 57.4 g/mol
can be generally defined as a change in position OA. Mass OB. Force OC. Volume OD. Motion Reset
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Answer:
Not sure were to start....
Explanation:
Answer: motion
Explanation: hope this helps you
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B:insect
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A. water lily
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Answer:
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Answer:
Because when they unfreeze and are cooled they would block pipes of the air liquefaction plant and make the air colder, hope this helps!!
You have three solutions of nickel complex ions, one is blue, one is violet, and one is green. Match the complex ion with the correct solution color.
A. [Ni(en)3]2+
B. [Ni(H2O)6]2+
C. [Ni(NH3)5]2+
Answers
Answer:
Explanation:
A. [Ni(en)₃]²⁺ --------- Violet
B. [Ni(H₂O)₆]⁺² -------Green
C. [Ni(NH₃)₅]⁺² ---------Blue .
In "The Philosophy of the Manufacturers" by Andrew Ure, the author compares a factory worker to a handmade
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c. The principle of the factory system then is, to substitute mechanical science for hand skill, and the
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Answers
"Certainly no muscular fatigue to sustain, while it procures for him good, unfailing wages, besides a healthy workshop gratis."
What idea does the quote supports?The concept that factory workers have it better than handcrafted workers is supported by this textual quotation since it implies that factory work is less physically taxing and offers better pay and working conditions.The author is suggesting that factory worker is in better position than hand worker.This is beneficial for the worker, as it means they can work for longer periods of time without experiencing the same level of exhaustion.Finally, the quote states that a factory provides a "healthy workshop gratis" which means that the factory provides a healthy and clean working environment for the worker without any additional costs. This is beneficial for the worker, as it means they can work in a safe and healthy environment, which is not always the case for hand workers.To know more about healthy workshop conditions quote, check out :
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__PbSO4 → __ PbSO3 +__O2
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Answer:
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Explanation:
mark me brainliest pls
Answer:
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Answer:
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edg 2022
Answer:
b
Explanation:
What is the molarity of a solution composed
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enough water to make 0.304 L of solution?
Answer in units of M.
Answers
Answer:
0.0845 M
Explanation:
First we convert 4.27 grams of potassium iodide into moles, using its molar mass:
Molar Mass of KI = 166 g/mol4.27 g ÷ 166 g/mol = 0.0257 molNow we calculate the molarity of the solution, using the number of moles and the given volume:
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Answer:
Chemical symbols are used to standardize the 'language of chemistry' and to identify elements and atoms in a chemical formula easily. Chemical symbols consist of one or two letters, most often derived from the name of the element.
Explanation:
Answer:
Explanation:
A chemical symbol is a notation of one or two letters representing a chemical element. Its used to identify elements and atoms in a chemical formula easily. Chemical symbols consist of one or two letters, most often derived from the name of the element.
If the temperature of 85.0 g of copper changes from 28.0°C to 99.0°C, how much
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answer to 3 sig figs.
Answers
Answer:
2320 J
Explanation:
We'll begin by calculating the change in temperature of the copper. This can be obtained as follow:
Initial temperature (T₁) = 28.0 °C
Final temperature (T₂) = 99.0 °C
Change in temperature (ΔT) =?
ΔT = T₂ – T₁
ΔT = 99 – 28
ΔT = 71 °C
Finally, we shall determine the heat absorbed by the copper. This can be obtained as follow:
Mass of copper (M) = 85 g
Change in temperature (ΔT) = 71 °C
Specific heat capacity (C) = 0.385 J/K.g
Heat (Q) absorbed =?
Q = MCΔT
Q = 85 × 0.385 × 71
Q = 2320 J
Thus, the heat absorbed is 2320 J
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Answers
Answer:
1451.42 g
Explanation:
Let assume that the mass of ocean water comprises 3.5%
NaCl = 3.5%
[tex]3.5 = \dfrac{50.8}{mass \ of \ ocean \ water } \times 100[/tex]
[tex]mass \ of \ ocean \ water = \dfrac{50.8}{3.5 } \times 100[/tex]
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b)35g
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d)90g
Answers
45 g
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PLZ HELP ASAP
Approximately how many grams of potassium chloride(KCI) are required to prepare 600. mL of a 2.50 M solution ?
A) 103 g
B) 112 g
D) 125 g
Answers
(B)
Explanation:
2.50 M KCl = (2.50 mol KCl/L)(0.600 L) = 1.50 mol KCl
molar mass of KCl = 74.5513 g KCl/mol
1.50 mol KCl × (74.5513 g KCl/mol) = 112 g KCl
If hydrogen diffuses at the rate of 10 cm³ per second from a given apparatus under given conditions of temperature and pressure, calculate under same conditions: a) the volume of oxygen (O₂) which diffuses in 20 seconds
Answers
Answer:
Volume of O₂ = 200cm³
Explanation:
Rate of diffusion of gas is directly and inversely proportional to the volume and time taken for the gas to diffuse completely.
Volume
R = -----------
time
let R₁ represent the rate at which the given volume of hydrogen gases diffuses and R₂ represent the rate at which the the volume of the oxygen gas diffused.
V₁, V₂, T₁ and T₂ follows the same process
If the two gases diffuses at the same rate, then;-
R₁ = R₂
V₁ V₂
---------- = ------------
T₁ T₂
V₂
10 = ----------------
20
V₂ = 20•10
V₂ = 200cm³
Therefore, the volume of oxygen that could diffuse in 20 seconds is 200cm³
An experiment requires 65.00 g of sodium chloride. Sodium chloride is available at a price of $179.0 per 5.000 kg sodium chloride. What is the cost of the sodium chloride in the experiment (reported to the hundredths place because we're working with dollars)?
Answers
Answer: on
Explanation:5
The price of sodium chloride per 5 kg is 179 dollars. The experiment requires 65 g of NaCl. The price of65 g or 0.065 kg is 2.3 dollars.
What is sodium chloride?Sodium chloride is an ionic compound formed by the combination of sodium metal and chlorine atom. Sodium metal has extra one electron in its valance shell and chlorine needs one more electron into its valence shell. Hence sodium donates its valence electron to chlorine forming NaCl.
NaCl is used as the table salt in food. It is a very important compound in our daily diet. Similarly NaCl is industrially important for many reaction especially in electrochemical processes.
It is given that, the price of 5 kg of NaCl = $179
required mass of NaCl = 65 g = 0.065 Kg
then , price of 0.065 kg = (0.065 × 179 /5) = $2.31
Therefore, the cost of NaCl in the experiment is 2.31 dollars.
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Hello!
please help me!
The nerve gas phosgene decomposes according to COC12(g) - CO(g) + Cl2(g), K = 0.32 at 1000 K. If
the initial concentration of phosgene is 0.015 M. what are the equilibrium concentrations of all gases?
Answers
Answer:
[tex][CO]=[Cl_2]=0.01436M[/tex]
[tex][COCl_2]=0.00064M[/tex]
Explanation:
Hello there!
In this case, according to the given chemical reaction at equilibrium, we can set up the equilibrium expression as follows:
[tex]K=\frac{[CO][Cl_2]}{[COCl_2]}[/tex]
Which can be written in terms of x, according to the ICE table:
[tex]0.32=\frac{x^2}{0.015M-x}[/tex]
Thus, we solve for x to obtain that it has a value of 0.01436 M and therefore, the concentrations at equilibrium turn out to be:
[tex][CO]=[Cl_2]=0.01436M[/tex]
[tex][COCl_2]=0.015M-0.01436M=0.00064M[/tex]
Regards!
Choose the correct statement. At a higher temperature……………..
1.Energies of particles increase
2.Rate of reaction increases
3.Particles collide more frequently
4.All correct
Answers
Answer:
4. All correct
Mark me brainliest and thenks :)))
What is the molarity of a solution containing 2 moles of sodium hydroxide (NaOH) dissolved in 4.0 L of solution?
Answers
Answer:
0.5M
Explanation:
Molarity = Mols/ Liters
so 2/4
0.5 M
A chemist morning commute is 40.2 kilometers. Given an average speed pf 60.5 mph, how many minutes will it take him to arrive at work?
Answers
A chemist morning commute is 40.2 kilometers. Given an average speed pf 60.5 mph, 0.66 minutes will it take him to arrive at work.
What is average speed ?The overall distance the object covers in a given amount of time is its average speed. A scalar value represents the average speed. It has no direction and is indicated by the magnitude.
If you know how far something has travelled and how long it took to get there, you can calculate its average speed. Speed is calculated as follows: speed = distance * time.
Distance = speed × time
40.2 = 60.5 × time
time = 40.2 / 60.5
= 0.66 minutes
Thus, A chemist morning commute is 40.2 kilometers. Given an average speed pf 60.5 mph, 0.66 minutes will it take him to arrive at work.
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please no links and round two decimal places
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Answer:
https://vm.tiktok.com/ZMet3FuC2/
20. A compound's empirical formula is C,H,O. If the molecular mass of the compound is
162.2g, what is the molecular formula?
NO LINKS PLEASE THIRD TIME IM POSTING THIS ITS DUE IN 8min
Answers
Answer:
Just use a text book.. So that you get the concept