Answer:
ndcuffaStuff that restrains you from something or someone basicially handcuffs or shackles
Explanation:
Answer:
a limitation or restriction.
OR
stiffness of manner and inhibition in relations between people.
Five liters of air at -36 c is warmed to 89c. what is the new volume if the pressure remains constant?
Answer:
Explanation:
The altitude is irrelevant, except as needed to define the pressure. In this example all three parameters of the Ideal Gas Laws are changing. We set up the equation to solve for the desired final volume. Start with the Ideal Gas Law:
P
⋅
V
=
(
n
⋅
R
⋅
T
)
where the number of moles of gas and the gas constant do not change.
(
P
V
T
)
1
=
(
P
V
T
)
2
Rearrange for the desired
V
2
, Temperatures must be in ‘K: 298 & 283.
(
P
1
V
1
T
1
)
×
T
2
P
2
=
V
2
V
2
=
P
1
×
V
1
×
T
2
T
1
×
P
2
V
2
=
730
×
855
×
283
298
×
605
=
980
L
“Change” in volume is
980
–
855
=
125
L
15.How can a pure sample of barium sulphate be otained from barium carbonate?
Answer:
Barium carbonate powder is stirred add pulp in the entry, the vitriol that the adds solubility then reaction that makes the transition is filtered and is obtained the barium sulfate filter cake and liquid after the transition.
Calculate the molarity of the two solutions.
The first solution contains 0.350 mol of NaOH in 1.05 L of solution.
molarity:
The second solution contains 14.3 g of NaCl in 879 mL of solution.
molarity:
1. 0.33 M
2. 0.278 M
Further explanationMolarity is a way to express the concentration of the solution
Molarity shows the number of moles of solute in every 1 liter of solute or mmol in each ml of solution
[tex]\large{\boxed {\bold {M ~ = ~ \frac {n} {V}}}[/tex]
Where
M = Molarity
n = Number of moles of solute
V = Volume of solution
1. 0.350 mol of NaOH in 1.05 L of solution.
n=0.35
V=1.05 L
Molarity :
[tex]\tt M=\dfrac{0.35}{1.05}=0.33[/tex]
2. 14.3 g of NaCl in 879 mL of solution.
mol NaCl(MW=58.5 g/mol) :
[tex]\tt mol=\dfrac{mass}{MW}\\\\mol=\dfrac{14.3~g}{58.5~g/mol}=0.244[/tex]
Molarity :
[tex]\tt M=\dfrac{0.244}{0.879~L}\\\\M=0.278[/tex]
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Hsnsgehsndgd
How do I cook eggs? Please tell me
Which two factors often determine the type of rock that is formed by a process?
A.The type of material that is present at the beginning of the process
B.The amount of time the process of rock formation takes
C.The season in which the rock formation process ends
D.Whether the process takes place north or south of the equator
Answer:
A and B
Explanation:
Trust me I just did it on a p e x
Answer: he’s correct it’s d and b for me but it’s the same answers
Explanation:
I need help plz before 12:18 because my teacher did she was going to Fall me
Answer:
You are right, it is the Engineer
Explanation:
You are asked to write observations about a 100g sample of Nitrogen-16 before it decays , but you running late. In order to make observations, you require at least 5g of material Can make observations you are 57 seconds late to the lab?
Answer:
You can not make the observation in the lab
Explanation:
We must know the amount of Nitrogen-16 that remains after 57 seconds before we can make our conclusion.
Hence, from;
N/No = (1/2)^t/t1/2
Where;
N = amount of Nitrogen-16 present after 57 seconds
No = 100g of Nitrogen-16 originally present
t = 57 seconds
t1/2 = half life of Nitrogen-16 which is 7.13 seconds
Substituting values;
N/100 = (1/2)57/7.13
N/ 100 =(1/2)^8
N/100 = 1/256
256N = 100
N = 100/256
N = 0.39 g
You can not make the observation because you need at least 5g of Nitrogen-16 and only 0.39 g is left after 57 seconds.
The minimum amount of sample required has been 5 grams, while the remaining sample has been 0.39 grams. Thus, it has not been possible to make the observations.
The half life can be defined as the time required for the sample to reduce to half of its initial concentration. The half life can be given as:
Amount remained = Initial amount [tex]\rm \times\;\dfrac{1}{2}^\dfrac{time}{Half-life}[/tex]
The half life of nitrogen 16 has been 7.13 second.
The initial concentration of the sample has been 100 grams.
The concentration of sample remained after 57 seconds has been:
Amount remained = 100 [tex]\rm \times\;\dfrac{1}{2}^\dfrac{57\;sec}{7.13\;sec}[/tex]
Amount remained = 0.39 grams.
The amount of sample remained after 57 seconds has been 0.39 grams.
The amount of sample required for the analysis has been 5 grams, after 57 seconds only 0.39 grams of sample has been remaining. Thus, the student will not be able to made analysis of nitrogen-16.
For more information about the sample decay, refer to the link:
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4. Which form of asexual reproduction describes the process of a cell dividing to
produce a copy?
Answer:
Mitosis
Mitosis is a method of cell division in which a cell divides and produces identical copies of itself.
Explanation:
When 80.0 mL of a 0.812 M barium chloride solution is combined with 40 mL of a 1.52 M potassium sulfate solution, 10.8 g of barium sulfate precipitates. What is the % yield of this reaction
Answer:
76.1%
Explanation:
The reaction that takes place is:
BaCl₂ + K₂SO₄ → BaSO₄ + 2KClFirst we determine how many moles of each reactant were added:
BaCl₂ ⇒ 80 mL * 0.812 M = 64.96 mmol BaCl₂ K₂SO₄ ⇒ 40 mL * 1.52 M = 60.8 mmol K₂SO₄Thus K₂SO₄ is the limiting reactant.
Using the moles of the limiting reactant we calculate how many moles of BaSO₄ would have been produced if the % yield was 100%:
60.8 mmol K₂SO₄ * [tex]\frac{1mmolBaSO_4}{1mmolK_2SO_4}[/tex] = 60.8 mmol BaSO₄Then we convert that theoretical amount into grams, using the molar mass of BaSO₄:
60.8 mmol BaSO₄ * 233.38 mg/mmol = 14189.504 mg BaSO₄14189.504 mg BaSO₄ / 1000 = 14.2 g BaSO₄Finally we calculate the % yield:
% yield = 10.8 g / 14.2 g * 100 %% yield = 76.1%how to differ mixture and compound? What are their differences?
Explanation:
"Compound: A substance that is made up of more than one type of atom bonded together.
Mixture: A combination of two or more elements or compounds which have not reacted to bond together; each part in the mixture retains its own properties."
- Libre Texts
Click on the photo to view full solution
What are the respective concentrations (M) of Mg2+and Cl-afforded by dissolving 0.325 mol MgCl2 in water and diluting to 250 mL?A) 0.0013 and 0.0013B) 0.0013 and 0.0026C) 1.30 and.1.30D) 1.30 and 2.60E) 2.60 and 2.60
Answer: D) 1.30 and 2.60
Explanation:
Molarity of a solution is defined as the number of moles of solute dissolved per liter of the solution.
[tex]Molarity=\frac{n\times 1000}{V_s}[/tex]
where,
n = moles of solute
[tex]V_s[/tex] = volume of solution in ml
molarity of [tex]MgCl_2[/tex] = [tex]\frac{0.325\times 1000}{250ml}=1.30 M[/tex]
[tex]MgCl_2\rightarrow Mg^{2+}+Cl^{-}[/tex]
As 1 mole of [tex]MgCl_2[/tex] dissociates to give one mole of [tex]Mg^{2+}[/tex] and two moles of [tex]Cl^-[/tex] ions .
Molarity of [tex]Mg^{2+}[/tex] = 1.30 M
Molarity of [tex]Cl^{-}[/tex] = [tex]1.3 M\times 2=2.60M[/tex]
Which of these elements has the highest first ionization energy?
a) As
b) Ga
c) Bi
d) Cs
e) K
Answer:
Cesium (Cs)
Explanation:
This eliment has an ionization energy of 3,8939
Indicate whether aqueous solutions of each of the following solutes will contain only ions, only molecules, or mostly molecules and a few ions:
a) NH4Cl, a strong electrolyte.
b) Ethanol, CH3-CH2-OH, a nonelectrolyte.
c) HCN, hydrocyanic acid, a weak electrolyte.
Answer:
Following are the solution to the given points:
Explanation:
In point a, the answer is only ions because of [tex]NH_4Cl[/tex] has a strong electrolyte.
In point b, the answer is the only molecules because of ethanol [tex]CH_3CH_2OH[/tex], it has a nonelectrolyte.
In point c, the answer is the few ions because of hydrocyanic acid HCN, which has a weak electrolyte.
(a) Only ions.
(b) Only Molecules.
(c) Few ions.
The explanation is as follows:(a) In this, only ions should be considered as it contains strong electrolyte.
(b) In this, only molecules should be considered as it contains non-electrolyte.
(c) In this, few ions should be considered due to hydrocyanic acid HCN, that contains weak electrolyte.
Therefore we can conclude that
(a) Only ions.
(b) Only Molecules.
(c) Few ions.
Learn more: brainly.com/question/17127206
which of the following is the best definition for volume
a. solids are the only matter with volume
b. all energy has volume
c. volume is the three-dimensional size of an object
d. gases do not have volume
Answer:
C
Explanation:
I hope that helps!!! it kinda gave you the answer though
Which of thes statements about heating up land and water is true
Answer:
b its radiant energy that heats up the earth.
Explanation:
Answer:
The answer is D
Explanation:
Heat from the Earth's core and radiation from the Sun is transferred to the surface of the Earth by conduction. The warm land and water radiates infrared, some of which is absorbed by the atmosphere, adding to its thermal energy.
What would the isotope symbol (in hyphen notation) look like for an atom that has a mass number of 204 and an atomic number of 82?
O a
Lead-82
ob
Thallium-204
Ос
Lead-204
Thallium-82
Od
HELP ASAP
Answer:
[tex]\boxed {\boxed {\sf C. \ Lead-204}}[/tex]
Explanation:
One way of writing an isotope is hyphen notation or:
element name - mass numberWe know the mass number (protons and neutrons) is 204. We can automatically eliminate choices A and C, because they claim the mass number is 82.
Now we must find the element name. We know the atomic number or number of protons is 82. Look on the periodic table for the element with atomic number 82, which is lead.
Therefore,
element name = Lead mass number = 204The isotope notation in hyphen notation is: Lead-204
What is the empirical formula for a compound that has 57.5%
Na, 40.0% 0, and 2.5% H?
a
Naz(OH)4
b
Na(OH)2
С
Na(OH)
d
Naz(OH)
Answer:
c
Explanation:
use %composition given to calculate emperical 4mular
The empirical formula of the compound having 57.5% Na, 40.0% O, and 2.5% H is NaOH (Option C)
Data obtained from the questionNa = 57.5%O = 40%H = 2.5%Empirical formula =?How to determine the empirical formulaDivide by their molar mass
Na = 57.5 / 23 = 2.5
O = 40 / 16 = 2.5
H = 2.5 / 1 = 2.6
Divide by the smallest
Na = 2.5 / 2.5 = 1
O = 2.5 / 2.5 = 1
H = 2.5 / 2.5 = 1
Thus, the empirical formula of the compound is NaOH
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The net ionic equation for the dissolution of zinc metal in aqueous hydrobromic acid is ________.
Answer:
[tex]Zn(s)+2H^+(aq)\rightarrow Zn^{2+}(aq)+H_2(g)[/tex]
Explanation:
Hello!
In this case, since writing the net ionic equation implies the complete molecular equation, we should start by:
[tex]Zn(s)+2HBr(aq)\rightarrow ZnBr_2(aq)+H_2(g)[/tex]
Next, we represent the ionization of the aqueous species:
[tex]Zn(s)+2H^+(aq)+2Br^-(aq)\rightarrow Zn^{2+}(aq)+2Br^-(aq)+H_2(g)[/tex]
Whereas the spectator ions, those at both reactants and products are cancelled out so the net ionic equation is obtained:
[tex]Zn(s)+2H^+(aq)\rightarrow Zn^{2+}(aq)+H_2(g)[/tex]
Best regards!
What is the energy of an X-ray with a frequency of 6.35 x 108 Hz?
Answer:
3x10 16hz 16 small above 10
Explanation:the frequency of any wave is (wave speed)/(wavelength)
The speed of light is 3x10 m/s. that's 30 million quartz
PLEASE HELP!’
DUE IN 10 MINS
Answer:
The products are SnPO4 and LiC2H3O2
Explanation:
The reactants are LiPO4 + Sn(C2H3O2)2
This is a double replacement reaction
So what you do is switch the elements the other way around.
To do that, all you have to do switch Sn with PO4 since Sn is a cation and PO4 is an anion.
Then you switch Li with C2H3O2 because Li is a cation and C2H3O2 is an anion.
After that, check the charges. PO4 has -3 charge
So just leave Sn the way it is without a subscript.
In word form, the product would be Tin(III) Phosphate
C2H3O2 has a -1 charge Li has a +1 charge
So leave both of them the way it is without any subscripts.
In word form, the product would be Lithium Acetate
The term "cycle" is used in Water Cycle because ?
Answer:
because cycle is a prosess that goes through multiple stages
Explanation:
.
What is the mass number of an atom that consists of 20 protons, 20 neutrons, and 18 electrons?
Answer:
C)a mass number of 38
Explanation:
yes
Sodium carbonate reacts with silver nitrate according to the following balanced equation: Na2CO3 (s) + 2 AgNO3 (aq) → Ag2CO3 (s) + 2 NaNO3 (9) If 3.60 g of Na2CO3 is allowed to react with 5.14 g of AgNO3, what mass of Na2CO3 will remain at the end of the reaction?
a) 2.01 g
b) 1.54 g
c) 0.423 g
d) 0.0150 g
e) 0g
Answer:
a) 2.01 g
Explanation:
Na₂CO₃ (s) + 2AgNO₃ (aq) → Ag₂CO₃ (s) + 2NaNO₃First we convert 0.0302 mol AgNO₃ to Na₂CO₃ moles, in order to calculate how many Na₂CO₃ moles reacted:
0.0302 mol AgNO₃ * [tex]\frac{1molNa_2CO_3}{2molAgNO_3}[/tex] = 0.0151 mol Na₂CO₃So the remaining Na₂CO₃ moles are:
0.0340 - 0.0151 = 0.0189 moles Na₂CO₃Finally we convert Na₂CO₃ moles into grams, using its molar mass:
0.0189 moles Na₂CO₃ * 106 g/mol = 2.003 g Na₂CO₃The closest answer is option a).
explain how to convert the moles to litters and litters to moles
17. Which of the following represent the correct net ionic equations from the double replacement reaction of
calcium nitrate and potassium phosphate?
a. Caaq) + PO43- (aq) → CaPO4(s)
b. Q Ca2+ (aq) + 3 PO43- (aq) → Caz(PO4)3(S)
c. 3 Ca2+ (aq) + 2 PO.3(aq) → Caz(PO4)2(S)
d. 2 NO3(aq) + Ca2+
+ Ca(NO3)2(S)
Answer:
D. 2 NO3(aq)+Ca2+
Explanation:
Reaction of calcium nitrate and potassium phosphate produce calcium phosphate and potassium nitrate. The net ionic equation for this is written as : [tex]3 Ca^{2+} (aq) +2PO_{4} ^{3-} (aq) \rightarrow Ca_{3}(PO_{4} )_{2} (s)[/tex]. Thus option C is correct.
What is double displacement reaction?
In a double displacement reaction, two species or groups in reactant side are displaced in the products.
In a balanced chemical equation, all the reactants have to be in proper stochiometric ratio and the states of all species are mentioned in brackets.
In an ionic equation all the ions and charges are balanced both side and the number of each elements on both side too. The net ionic equation represents the formation of a solid product from its ions.
The balanced molecular equation and complete ionic equation are written for the given reaction below:
[tex]3 Ca (NO_{3})_{2} (aq)+ 2K_{3} PO_{4} (aq) \rightarrow Ca_{3}(PO_{4} )_{2} (s) + 6 KNO_{3}(aq)[/tex]
[tex]3 Ca^{2+} (aq) +6 NO_{3}^{-} + (aq)+ 6K^{+} + (aq) 2PO_{4} ^{3-} (aq) \rightarrow Ca_{3}(PO_{4} )_{2} (s) + 6 NO_{3}^{-} (aq)+ 6K^{+} (aq)[/tex]
Now when the same species on both side is cancelled, then the net ionic equation is written as:
[tex]3 Ca^{2+} (aq) +2PO_{4} ^{3-} (aq) \rightarrow Ca_{3}(PO_{4} )_{2} (s)[/tex]
Therefore, the correct et ionic equation is option c.
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Help please! I’ll give brainliest!
Which gas law is represented by the following equation: V1/T1 = V2/T2
1 point
Gay-Lussac's law
Boyle's law
Avogadro's law
none of these
Charles's law
Answer:
Charles's law
Explanation:
The chemical equation given is that of Charles's law;
The law states that "the volume of a fixed mass of a gas varies directly as its absolute temperature if the pressure is constant"
mathematically;
v ∝ T ( P, n constant)
So;
V1/T1 = V2/T2
V and T are volume and temperature values
1 and 2 are initial and final states
How many different elements are involved in the chemical reaction shown?
2Fe2O2 + 3C --> 4Fe+3CO2
Answer:
3
Explanation:
fe is iron ,O is oxygen and C is carbon
pls help I I alot of HELP
Answer:
They need more oxhygen to fraction to incresse
Explanation: