Answer:
D
Explanation:
chemical properties
I'm not sure abt it but hope that helps
Can somebody answer these questions
I know it this one is easy I had the same one.
If the temperature of 85.0 g of copper changes from 28.0°C to 99.0°C, how much
heat was absorbed? The specific heat capacity of copper is 0.385 J/K:g. Write your
answer to 3 sig figs.
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
What is the molarity of a solution composed
of 4.27 g of potassium iodide (KI) dissolved in
enough water to make 0.304 L of solution?
Answer in units of M.
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:
Molarity = moles / litersMolarity = 0.0257 mol / 0.304 L = 0.0845 M__PbSO4 → __ PbSO3 +__O2
Balance the equation and indicate the type of reaction
What mass of ocean water in grams contains 50.8 g of NaCl?
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]
mass of the ocean water = 1451.42 g
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)?
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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CAN SOMEONE HELP ME PLS I HAVE A FINAL TMMR WITH THESE
write the states of matter and balanced equations
- in the presence of heat gold (ll) acetate decomposes
- aluminum wire is added to a solution of nickel (ll) nitrate
- a solution of sodium phosphate is added to a solution of ammonium chromate
The states of matter and balanced equations are as follows:
Au(C₂H₃O₂)₂ (s) --> Au (s) + 2CO₂ (g) + 3H₂O (g)Al (s) + Ni(NO₃)₂ (aq) --> Al(NO₃)₃ (aq) + Ni (s)Na₃PO₄ (aq) + NH₄CrO₄ (aq) --> NaCrO₄ (aq) + NH₄PO₄ (aq)What is a balanced chemical reaction?Chemical bonds are broken and new bonds are formed during chemical reactions, but atoms in the reactants do not disappear and new atoms do not form products. Chemical reactions do not create or destroy atoms. The same atoms that were present in the reactants are present in the products—they are just rearranged in different configurations. must exist in
The subscript is part of the formula and should not be changed once the reactant and product formulas have been determined. The coefficients indicate the number of each substance involved in the reaction and can be changed to balance the equation.
In the presence of heat Gold (ll) acetate decomposes:
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:
Na₃PO₄ (aq) + NH₄CrO₄ (aq) --> NaCrO₄ (aq) + NH₄PO₄ (aq)
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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?
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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Which molecules do your cells get from food?
(Select two answers)
A) Amino Acid
B) Glucose
C) Oxygen
D) Carbon Dioxide
Answer:
b
Explanation:
mark me brainliest pls
Answer:
b
Explanation:
bc
Are weathering and erosion two different names for the same process? Explain why or why not.PLEASE HELP!
Answer:
While weathering and erosion are similar processes, they are not synonymous. Weathering involves the breakdown of rocks and minerals on Earth, whereas erosion involves the removal of soil and rock materials.
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]
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
Step 4: Calculate the molar mass of the gas
0.982 g of the gas correspond to 0.0171 moles.
M = 0.982 g/0.0171 mol = 57.4 g/mol
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
Answer:
Just use a text book.. So that you get the concept
CHEMISTRY - DOES ANYONE KNOW HOW TO DO THIS QUESTION???
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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g h g jg jh gj h g jhg u iga ff f. f. f f f
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
(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
Which of the following is an electrolyte?
CH4OH
O Ca(NO3)2
O C12H22011
O CH3CH2OH
Answer:
B. Ca(NO3)2
Explanation:
edg 2022
Answer:
b
Explanation:
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
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
why is carbon IV oxide and water removed before liquefication of air?
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!!
Matthew added a sample of sodium chloride to water and
found the poH to be 2,55. What is the pH of the salt solution?
pH
Answer:
11.45
Explanation:
The ph is just 14-pOH so
14-2.55=ph=11.45
What is the molarity of a solution containing 2 moles of sodium hydroxide (NaOH) dissolved in 4.0 L of solution?
Answer:
0.5M
Explanation:
Molarity = Mols/ Liters
so 2/4
0.5 M
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?
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!
please no links and round two decimal places
Answer:
https://vm.tiktok.com/ZMet3FuC2/
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+
Answer:
Explanation:
A. [Ni(en)₃]²⁺ --------- Violet
B. [Ni(H₂O)₆]⁺² -------Green
C. [Ni(NH₃)₅]⁺² ---------Blue .
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
Answer:
4. All correct
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PLEASE HELP! 80 POINTS
Create a VESPR drawing for
NH3
CH20
N3
SO2CI2
BrF5
Answer:
hope it helps you
How many grams of KCl, are soluble in 100 g of water at 60 ºC?
a)15g
b)35g
c)45g
d)90g
45 g
the solubility of KCl in water at 60 degree c is 45.5g per 100g of water
In "The Philosophy of the Manufacturers" by Andrew Ure, the author compares a factory worker to a handmade
worker. The author leads the reader to the idea that the factory worker is better off. Choose evidence (a quote
from the text) to support this idea.
a. Certainly no muscular fatigue to sustain, while it procures for him good, unfailing wages, besides a
healthy workshop gratis.
b. The lot of mankind, have been too little dwelt upon; while, on the other har, it has been accused of
lending itself to the rich capitalists as an instrument for harassing the poor.
c. The principle of the factory system then is, to substitute mechanical science for hand skill, and the
partition of a process into its essential constituents.
"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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What is the importance of a chemical symbol?
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.
can be generally defined as a change in position OA. Mass OB. Force OC. Volume OD. Motion Reset
Answer:
Not sure were to start....
Explanation:
Answer: motion
Explanation: hope this helps you
why is heat or thermal energy considered a form of kinetic energy