Answer:
0.0800 (on CK-12)
Explanation:
Given grams of CuCl2/molar mass of CuCl2
27.2g/134.45g=0.2023...
Next,
0.2023mol/2.50L = 0.0800
The molality of the copper(II) chloride (CuCl₂) solution is 0.081 mol/kg
MolalityMolality is a measure of the number of moles of solute in a solution corresponding to 1 kg or 1000 g of solvent
First, we will determine the number of moles of CuCl₂ present
Using the formula,
[tex]Number\ of\ moles = \frac{Mass}{Molar\ mass}[/tex]
Mass of CuCl₂ = 27.2 g
Molar mass of CuCl₂ = 134.45 g/mol
∴ Number of moles of CuCl₂ present = [tex]\frac{27.2}{134.45 }[/tex]
Number of moles of CuCl₂ present = 0.2023 mole
Now, for the molality of the solution
Volume of solvent (water) = 2.50 L
Since the density of water = 1kg/L
Then, mass of the solvent (water) = 2.50 kg
[tex]Molality = \frac{Number\ of\ moles}{Mass\ of\ solvent}[/tex]
∴ Molality of the solution = [tex]\frac{0.2023}{2.50}[/tex]
Molality of the solution = 0.081 mol/kg
Hence, the molality of the solution is 0.081 mol/kg
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How to take off acrylic nails at home with acetone?.
Based on the two starting amounts of Cu and HNO₃, the amount of NO₂ produced should be 0.0944 moles.
Calculate the concentration (in molarity) of the gas if that gas were confined to the 250 mL of space in the flask.
The concentration (in molarity) of the gas if that gas were sealed to the 250 mL of space in the flask is 0.3776 M.
How do we calculate the molarity?Molarity of any substance is defined as the number of moles of solute present in per liter of the solution and it will be represented as:
M = n/V, where
n = moles = 0.0944mol
V = volume = 250mL = 0.25L
On putting values, we get
M = 0.0944 / 0.25 = 0.3776 M
Hence required molarity is 0.3776 M.
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Learning Task 1: In your notebook, write the appropriate tempo for the following actions. Then, demonstrate the action in front of your parents/guardians. 1. a man walking 4. a jet flying 2. a rabbit hopping 5. a horse running 3. a turtle crawling
A tempo is a speed or rhythm, at which the action is performed or the activity is done. A man walking is a moderate tempo and a turtle is a slow tempo.
What are the types of tempo?Tempo is the speed or rate at which an action or activity is conducted. It can be moderate, fast, or slow in action.
A slow tempo is a speed that is slow in general speed and is not immediate in action like turtle crawling is a slow tempo as it crawls very slowly.
A moderate tempo is the action that is intermediate between slow and the fast tempo and is a regular movement like a man walking.
A fast tempo is a fast action or activity performed by someone quick and effective like a rabbit hopping, a horse running, and a jet flying.
Therefore, the tempo can be slow, moderate, or fast.
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CH4 + 2O2 → CO2 + 2H2O, ΔH = -890 kJ/mol How many kJ would be released with 1 water
Answer:
Explanation:The enthalpy change for the reaction CH4(g) + 2O2(g) arrow CO2(g) + 2H2O(l) is -891 kJ/mol.
Which statement is true of the following reaction? upper h subscript 2 plus upper o subscript 2 right arrow upper 2 h superscript plus, plus upper o superscript 2 minus. it is balanced for oxidation state and for number of atoms. it is not balanced for oxidation state or for number of atoms. it is not balanced for oxidation state but is balanced for number of atoms. it is balanced for oxidation state but is not balanced for number of atoms.
Answer:
B) It is not balanced for oxidation state or for number of atoms
Explanation:
I got this question correct on my Edge quiz, so I know that this is the right answer.
The reactant side has 2 oxygen atoms, while the product side only has 1. This means the mass isn't balenced. In addition, the oxidation (charge) on the reactant side is 0, while it's -2 on the product side. This means the oxidation nor mass is balenced.
Hope that helps you!
Answer:
b
Explanation:
What does homeostasis refer to
Answer:
Homeostasis, as currently defined, is a self-regulating process by which biological systems maintain stability while adjusting to changing external conditions.
Explanation:
What is the difference between saturated and unsaturated solutions in amounts (from 1/6)
Answer:
saturated compounds have a large amount of solute in them, unsaturated solutions do not
The vapor of a nitrogen oxide with a mass of 1.08 g occupies 22.4 L at 0oC and pressure 7.60 Torr. What is the proper chemical name of this nitrogen oxide
The proper chemical name of the nitrogen oxide compound having a mass of 1.08 g is dinitrogen pentoxide, N₂O₅
How to determine the mole of the nitrogen oxideVolume (V) = 22.4 L Pressure (P) = 7.6 torr Temperature (T) = 0 °C = 0 + 273 = 273 KKGas constant (R) = 62.364 torr.L/Kmol Number of mole (n) =?Using the ideal gas equation, the number of mole of the nitrogen oxide can be obtained as follow:
PV = nRT
Divide both side by RT
n = PV / RT
n = (7.6 × 22.4) / (62.364 × 273)
n = 0.01 mole
How to determine the molar mass of the compound Mass = 1.08 gMole = 0.01 mole Molar mass =?Molar mass = mass / mole
Molar mass = 1.08 / 0.01
Molar mass = 108 g/mol
Comparing the molar mass of the compound with the molar mass of nitrogen oxide compounds, only dinitrogen pentoxide (N₂O₅) has a molar mass of 108 g/mol.
Thus, the name of the compound is dinitrogen pentoxide
CheckMolar mass of N₂O₅ = (14×2) + (16×5)
Molar mass of N₂O₅ = 28 + 80
Molar mass of N₂O₅ = 108 g/mol
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1 mole of H20 has the same mass as 1 mole of 02 true or false.
1.-A mixture of aluminum metal and chlorine gas reacts to form aluminum chloride (AlCl3): 2Al(s) +
3Cl2(g) → 2AlCl3(s). How many moles of aluminum chloride will form when 5 moles of chlorine gas react
with excess aluminum metal?
The number of mole of aluminum chloride, AlCl₃ produced when 5 moles of chlorine gas, Cl₂ reacts is 3.33 moles
Balanced equation2Al(s) + 3Cl₂(g) → 2AlCl₃(s)
From the balanced equation above,
3 moles of Cl₂ reacted to produce 2 moles of AlCl₃.
How to determine the moles of AlCl₃ producedFrom the balanced equation above,
3 moles of Cl₂ reacted to produce 2 moles of AlCl₃.
Therefore,
5 moles of Cl₂ will react to = (5 × 2) / 3 = 3.33 moles of AlCl₃.
Thus, 3.33 moles of AlCl₃ were obtained from the reaction.
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What is the total number of atoms in 0. 26mol of glucose, (C6H12O6)
Answer:
the answer is 6 atoms
Question 1 (1 point)
What are examples of wetlands?
Choose all that apply.
Question 1 options:
estuaries
wet meadows
marshes
bogs
Question 2 (1 point)
Estuaries are the place where rivers flow into the sea, and the freshwater they contain meets and mixes with salty seawater.
Question 2 options:
True
False
Question 3 (1 point)
_________ are special features or body parts that living things use to help them survive in a biome.
Question 3 options:
rivers
habitats
biomes
adaptations
Question 4 (1 point)
Freshwater biomes depend on the ___________.
Question 4 options:
water cycle
nitrogen cycle
phosphorus cycle
carbon cycle
Question 5 (1 point)
River plants have to cope with moving water. Plants, like eelgrass, have short wide leaves so they don't get washed away.
Question 5 options:
True
False
Answer: Q1: Wet meadows, & Marshes
Q2: True
Q3: Habitats
Q4: Water cycle
Q5: True
Hope this helps & have a blessed day. :)
A sample of thulium-171 has a mass of 0.4055 g and is radioactive. How much of this sample if left after 6 half-lives
Answer:
6.336 mg
Explanation:
.4055 x (1/2)^6 = .006336 gm
The ai for sodium for adults is ______ milligrams per day.
Answer:
1500 milligrams
4. In aliens, skin color is a codominant trait. What skin color will the offspring of the following parents have?
Parent 1
Parent 2
Nest
А
B
C
O A Skin color A (pink)
O B. Skin color Byblue)
O C. Skin color (pink with blue spots)
O D. Skin color D (green)
At what temperature would 2. 10 moles of N2 gas have a pressure of 2. 25 ATM and in 25. 0 L tank?
Answer:
About 326 K.
Explanation:
Recall the ideal gas law:
[tex]\displaystyle PV = nRT[/tex]
Where P is the pressure, V is the volume, n is the number of moles, R is the universal gas constant, and T is the temperature.
Because we want to solve for temperature T:
[tex]\displaystyle T = \frac{PV}{nR}[/tex]
Substitute and evaluate. R has a value of 0.08206 L-atm/mol-K:
[tex]\displaystyle \begin{aligned} T & = \frac{(2.25\text{ atm})(25.0\text{ L})}{(2.10\text{ mol})\left(\dfrac{0.08206\text{ L - atm}}{\text{mol - K}}\right)} \\ \\ & = 326\text{ K}\end{aligned}[/tex]
In conclusion, the temperature of the gas will be about 326 K.
What does an-ite or-ate ending in a polvatomic ion mean?
Answer:
An -ite or -ate ending means a polyatomic ion that includes oxygen is in the formula.
ate = one more O than -ite
Explanation:
Example:
NO2 is nitrite
NO3 is nitrate
You can see that the molecules are made of the same elements, however they have more or less of one of the elements (i.e. oxygen).
These suffices are used in oxygen compounds
Take example of Sulphur
SO_2=sulphiteSO_3=sulphateite means 2 and ate means 3
Which property of water contributes most to the ability of fish in lakes to survive very cold winters?.
Answer:
And that means fish must be able to survive down here. This is due to a special property of water: the elasticity of H2O. We know that when the temperature sinks below freezing, water first contracts and then expands as it begins to turn to ice. Ice, being lighter than water, floats.
Explanation:
The property of water that allows fish to survive in a lake that is frozen over is the fact that ice is less dense than liquid water.
30 POINTS How is Gestalt Psychology related to creativity?
Answer:
Gestalt pioneers contribute rich examples of creative thinking and practice in their writings and in their work
Explanation:
Scientists are trying to understand the composition of substances on
different planets. Which best describes how scientists are probably working
on this problem?
O A. Scientists share information with other scientists who approach
the problem in the same way so that they get support for their
observations.
O B. Scientists study the problem in the same way because they have
similar backgrounds and share information with each other.
O C. Scientists with different perspectives approach the problem in
various ways, but they all make observations and look for
patterns.
O D. Scientists with the same perspectives use similar experiments so
that they can compare results and draw the same conclusions.
Answer:
I would say C
Explanation:
The half-life of Co-60 is 5. 3 years. If the initial mass of the sample is 1000g, how much will remain after 15. 9 years
Answer:
125 gm
Explanation:
15.9 / 5.3 = 3 half lives
1000 (1/2)^3 =
Which of these is a structural isomer of butanol?
Answer:
There are three structural isomers of 1-butanol: 2-butanol ), 2-methyl-1-propanol , and 2-methyl-2-propanol . 2-Butanol, or sec-butanol, or sec-butyl alcohol, or s-butyl alcohol, is a four-carbon chain, with the OH group on the second carbon.
Explanation:
You didnt give me a shape or anything so heres your answer hope it helps.
What is the hydroxide ion concentration of a solution with a hydrogen ion concentration of 7.58 × 10-10 M?
what is the number and kind of element of C3H8NCl
There are four kinds of elements i.e carbon, hydrogen, nitrogen, and chlorine. The compound name is allylamine Hydrochloride.
What is an allyl group?An allyl group is a substituent with the structural formula
[tex]H_2C=CH - CH_2R[/tex], where R is the rest of the molecule.
There are four kinds of elements i.e carbon, hydrogen, nitrogen, and chlorine. The compound name is allylamine Hydrochloride.
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Help !
let’s see who can share the best answer..
i’ll mark as brainiest
Explanation:
Lemonade is a sweetened lemon-flavored beverage. There are varieties of lemonade found throughout the world. In North America and South Asia, cloudy lemonade dominates. It is traditionally a homemade drink using lemon juice, water, and a sweetener such as cane sugar, simple syrup or honey.
Heavy cream, also called heavy whipping cream, is whipping cream with a milk fat content of between 36 and 40 percent. Whipping cream will double in volume when whipped.
Generally, flour does not dissolve in water as it consists of starch granules, proteins and lipids that are all insoluble in water due to their molecular structure. Instead of dissolving in water, flour will absorb water to form a sticky suspension.
What do you call a solution that uses water as the solvent?.
Zinc reacts with hydrochloric acid according to the following balanced chemical equation:
Zn (s) + 2 HCl(aq) → ZnCl2(aq) + H2(g)
A student needs to react 0. 265 mol Zn with hydrochloric acid. Calculate the minimum number of moles of HCl required,
assuming all the zinc reacts?
Enter your answer to three significant figures. Do not include units.
Answer:
Zinc metal reacts with hydrochloric acid according to the following balanced equation:
Zn(s)+2HCl(aq)→ZnCl2(aq)+H2(g)Zn(s)+2HCl(aq)→ZnCl2(aq)+H2(g)
When 0.122 gg of Zn(s)Zn(s) is combined with enough HClHCl to make 50.9 mLmL of solution in a coffee-cup calorimeter, all of the zinc reacts, raising the temperature of the solution from 21.5 ∘C∘C to 24.2 ∘C∘C.
Explanation:
For each of the following acid-base titration combinations , determine the number of moles of the first substance listed that would be the chemically equivalent amount of the second substance.
a. NaOH with 1.0 mol HCL
b. HNO3 with 0.75 mol KOH
c. Ba(OH) with 0.20 mol HF
d. H2SO4 with 0.90 mol Mg(OH)2
1.0 mol HCl will require 1.0 mol NaOH, 0.75 mol KOH will require 0.75 mol [tex]HNO_3[/tex], 0.20 mol HF will require 0.1 mole [tex]Ba(OH)_2[/tex], and 0.90 mol [tex]Mg(OH)_2[/tex] will require 0.90 mole [tex]H_2SO_4[/tex]
What are mole ratios?It is the ratio of the chemical components in chemical reactions.
The equation for each of the listed reactions is as follows:
NaOH + HCl ---------> NaCl + [tex]H_2O[/tex][tex]HNO_3 + KOH ----- > KNO_3 + H_2O[/tex][tex]Ba(OH)_2 + 2HF ------ > BaF_2 +2 H_2O[/tex][tex]H_2SO_4 + Mg(OH)_2 ---- > MgSO_4 + 2H_2O[/tex]The mole ratio of NaOH and HCl is 1:1, that of [tex]HNO_3[/tex] and KOH is also 1:1, that of [tex]Ba(OH)_2[/tex] and HF is 1:2, and that of [tex]H_2SO_4[/tex] and [tex]Mg(OH)_2[/tex] is 1:1.
Thus, 1.0 mol HCl will require 1.0 mol NaOH, 0.75 mol KOH will require 0.75 mol [tex]HNO_3[/tex], 0.20 mol HF will require 0.1 mole [tex]Ba(OH)_2[/tex], and 0.90 mol [tex]Mg(OH)_2[/tex] will require 0.90 mole [tex]H_2SO_4[/tex]
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what is A reaction in which energy is absorbed called?
Answer:
Endothermic reaction
Explanation:
It is because energy used when bonds break is greater than energy used when bonds form
Would a hurricane more likely remain a hurricane if it reached point A or point B? Explain your answer.
Answer:
Hurricane will stay hurricane.
Explanation:
(B) Water provides energy
(A) it will die if it's on land