what are two factors about particles that enable them to form solutions (SCIENCE)
Answer:
temperature and whether or not they are polar or non-polar.
A chemist prepares a solution of iron(III) bromide (FeBr3) by measuring out 41.1 mg of FeBr3 into a 50. mL volumetric flask and filling to the mark with
distilled water.
Calculate the molarity of Br- anions in the chemist's solution
Be sure your answer is rounded to 2 significant digits.
Answer: The molarity of [tex]Br^-[/tex] anions in the chemist's solution is 0.0084 M
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
moles of [tex]FeBr_3[/tex] = [tex]\frac{\text {given mass}}{\text {Molar mass}}=\frac{0.0411g}{295.6g/mol}=0.00014mol[/tex]
Now put all the given values in the formula of molality, we get
[tex]Molarity=\frac{0.00014\times 1000}{50}=0.0028[/tex]
As 1 mole of [tex]FeBr_3[/tex] gives = 3 moles of [tex]Br^-[/tex]
0.0028 moles of [tex]FeBr_3[/tex] gives = [tex]\frac{3}{1}\times 0.0028=0.0084 moles[/tex] of [tex]Br^-[/tex]
Thus the molarity of [tex]Br^-[/tex] anions in the chemist's solution is 0.0084 M
Consider the model of the nitrogen atom which electron configuration matches the model
Answer:
1s², 2s², 2p³
Explanation:
The atomic number of Nitrogen is seven. So it contains seven protons and seven electrons in neutral form. Also, the electronic configuration cited above contains seven electrons among which two electrons are present in first shell and five electrons are present in valence shell respectively.
For neon, determine the moles and mass contained in a 29.9−L volume at a pressure of 481.1 torr at a temperature of 300.0 K.
Answer:
.7689 mol
15.516 g
Explanation:
Use the Ideal Gas Law, PV = nRT.
Make sure to use the correct ideal gas constant R. You can either put R in torr, or you can change the pressure to atm. I've just used the torr ideal gas constant.
481.1 torr * 29.9 L = n 62.364 LTorr/molK * 300 K
14384.89 = 18709.2n
n = .7689 mol
The molar mass of neon (remember that neon gas = Ne, it's not diatomic) is 20.18 g/mol from the periodic table.
.7689 mol * 20.18 g/mol = 15.516 g
An ice freezer behind a restaurant has a freon leak, releasing 41.60 g of C2H2F3Cl into the air every week. If the leak is not fixed, how many kilograms of fluorine will be released into the air over 6 months? Assume there are 4 weeks in a month. mass of fluorine leaked over 6 months:
The compound diborane can be used as a rocket propellant. What is the percent composition of boron in diborane (B2H6)? A. 22% B. 25% C. 39% D. 75% E. 78%
Answer: E. 78%
Explanation:
Diborane (B2H6), a chemical compound made up of approximately 78% Boron and 22% Hydrogen.
Answer:
E
Explanation:
#edmentumgang
When balanced, which equation would have the coefficient 3 in front of any of the reactants? Zn + HCl ZnCl2 + H2 H2SO4 + B(OH)3 B2(SO4)3 + H2O Fe + AgNO3 Fe(NO3)2 + Ag C2H4O2 + O2 CO2 +H2O
Answer:
b
Explanation:
i got it right on edge
To balance a reaction means to make the number of atoms the same on both the reactants and products side. The steps for balancing is as follows:-
Balance the Metal firstThen balance the HydrogenBalance the oxygen at lastAccording to the question, there are third reactions. the reaction third has the 3 coefficient before the compound.
The balanced reaction is as follows:-
[tex]3H_2So_4 + 2B (OH)_3------->B_2(So_4)_3 + 6H_2O[/tex]
Hence the correct compound is[tex]3H_2SO_4[/tex].
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please help quick im on a test and i only got an few mins left
What Is the Reactivity Series? ...
How Do Glow Sticks Glow? ...
How Do You Get Different Coloured Fireworks? ...
What Is an Alloy? ...
Answer:
hey
Explanation:
Answer:
I'm really not sure
Explanation:
So there's the answer
Explain the difference between layers and band.
Answer:
Foliation is developed by stress and fire while layering is developed by the embedding of fine and coarse deposits. Foliation is caused due to an alteration of minerals from pressure and heat while layering is developed by seasonal changes
Explanation:
Banding occurs when two different mineral compositions alternate in thin layers (typically 1 mm to 1 cm). The two types of layers typically contain the same minerals, but in different proportions, giving the rock a striped appearance. A foliation is defined by its banding.
What is foliation rocks?There are two major types of metamorphic rock textures: foliated and nonfoliated. Foliation in rock is caused by the parallel alignment of Platy minerals (such as Muscovite, Biotite, and Chlorite), Needle-like minerals (such as Hornblende), or Tabular minerals (e.g., feldspars). Because of the parallel alignment, the granite easily splits into thin sheets or layers. Foliation can be found in both aphanitic and phaneritic metamorphic rocks. A few foliated rocks also have bands.A banded rock has alternating thin layers of two different mineral compositions, with thicknesses ranging from 1 mm to 1 cm. The same minerals are found in both types of strata, but in varying amounts, giving the rock a striped appearance. A foliation is defined by its banding.To learn more about foliation, refer to:
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Which of the following is an example of a mixture?
A. NaCl
B. CO2 + H2 + O2
Ос. Са
D. C6H1206
Reset Selection
Answer:
B.
Explanation:
CO2 + H2 + O2 - are 3 individual substances.
Which of these is an example of interactions between the atmosphere and hydrosphere? (3 points) formation of snow cracking of rocks due to heat destruction of houses by wind uprooting of trees during tornadoes
Answer:
A. formation of snow
Explanation:
The formation of snow is an example of interactions between the atmosphere and hydrosphere.
As snow formation takes place when water vapor converted into liquid through condensation in the clouds. As water droplets rises high in clouds, cooler air present in atmosphere allow to lower the temperature and water droplets form ice or snow.
Hence, the correct option is A.
Answer:
A:formation of snow
Explanation:
fill in the blank
_______ is a gaseous state of matter that contains appreciable numbers of electrically charged particles.
Diamond is harder than graphite. This is a _______ observation.
Chemistry is defined as the study of _______.
Answer:
1. plasma; 2. qualitative; 3. matter;
Explanation:
PLASMA is a gaseous state of matter that contains appreciable numbers of electrically charged particles.
Diamond is harder than graphite. This is a QUALITATIVE observation.
Chemistry is defined as the study of MATTER.
Plasma is a gaseous state of matter that contains appreciable numbers of electrically charged particles.Diamond is harder than graphite. This is a qualitative observation.Chemistry is defined as the study of matter.
What is matter?Matter in chemistry, is defined as any kind of substance that has mass and occupies space that means it has volume .Matter is composed up of atoms which may or not be of same type.
Atoms are further made up of sub atomic particles which are the protons ,neutrons and the electrons .The matter can exist in various states such as solids, liquids and gases depending on the conditions of temperature and pressure.
The states of matter are inter convertible into each other by changing the parameters of temperature and pressure.Matter is always conserved according to law of conservation of matter.
Learn more about matter,here:
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What happens to the motion of the atoms in a spoon after is placed in hot soup?
Answer:
they move faster
Explanation:
Answer:
They move faster.
How many moles of neon (Ne) gas have a volume of 2.2 L and a pressure of
0.83 atm at 283 K?
(The universal gas constant is 0.0821 L.atm/mol.K.)
O A. 13 mol
O B. 0.11 mol
O C. 42 mol
O D. 0.079 mol
Answer:
D. 0.079 mol
Explanation:
This question involving the number of moles of neon (Ne) gas can be solved using the ideal gas law, also called the general gas equation.
The formula for the general gas equation is:
PV = nRT
Where;
P = pressure (atm)
V = volume (Litres)
n = amount of substance (mol)
R = ideal gas constant
T = temperature (K)
In this question, P is given as 0.83atm, V = 2.2L, R = 0.0821 L.atm/mol.K, T= 283K, n = ?
We calculate 'n' by making it the subject of the formula i.e.
PV= nRT
Divide both sides by RT, we have;
n = PV/RT
Hence, we input our values
n = 0.83 × 2.2 / 0.0821 × 283
n= 1.826 / 23.2343
n = 0.07859
Hence, n is approximately 0.079 mol
how can the hemlock woolly upset natural ecosystem?
Answer:
The HWA attacks eastern hemlock trees in forests and ornamental hemlock trees found in our residential landscaping. It feeds on the hemlock trees' young twigs by sucking the sap, causing their buds to die and needles to dry out and drop from the plant prematurely i think
hope i helped!!
Latent heat of vaporization is used to (1 Point) (a) overcome the forces of attraction between molecules in solid-state. (b) increase the kinetic energy of molecules in a liquid state. (c) overcome the forces of attraction between molecules in a liquid state. (d) increase the kinetic energy of molecules in the vapour state.
Answer:
Not sure what the answer is
Explanation:
I did this a while ago and dont remember sorry
What is one way in which chemistry affects your everyday life?
A. Refrigerators use energy more efficiently than they did 10 years
ago.
B. Tap water is safe to drink because it is monitored for harmful
substances.
c. Weather forecasts are now more accurate because of radar.
D. Watches are now more accurate because they are digitalized.
Answer: B
Explanation: Water is filtered with a bunch of chemicals which makes it drinkable.
Aluminum hydroxide is often present in antacids to neutralize stomach acid (HCl). If 14.0 g aluminum hydroxide is present in an antacid tablet, determine the theoretical yield of aluminum chloride produced when the tablet reacts with stomach acid. If the actual yield of the aluminum chloride from this tablet is 22.0 g, what is the percent yield?
Answer:
Percent Yield = 91.97%
Explanation:
Aluminum hydroxide Formula: Al(OH)3 Molar mass: 78 g/mol
Stomach acid Formula: HCl Molar mass: 36.46 g/mol
Aluminum Chloride Formula: AlCl₃ Molar mass: 133.34 g/mol
14g Al(OH)3
2Al(OH)3 + Cl2 → 2Al(OH)3Cl
Balanced equation
14/156 = 0.0897 Moles of Al(OH)3
Ratio is 2:1:2 so same ratio for Al(OH)3 to AlCl₃
0.0897 x 266.68 = 23.92grams of AlCl₃
Theoretical yield of aluminum chloride
Actual yield aluminum chloride 22.0 g
Percent yield?
Percent Yield = (actual Yield/Theoretical yield) x 100
Percent Yield = (22/23.92) x 100
Percent Yield = 91.97%
The percent yield of aluminum chloride in the neutralization reaction has been 91.97%.
The balanced reaction for neutralization of stomach acid with aluminum hydroxide has been:
[tex]\rm Al(OH)_3\;+\;3\;HC\l\rightarrow\;AlCl_3\;+\;3\;H_2O[/tex]
The reaction has been determined that 1 mole of aluminum hydroxide forms 1 mole of aluminum chloride. The moles of aluminum hydroxide has been given as:
Moles = [tex]\rm \dfrac{Mass}{Molecular\;mass}[/tex]
Moles of Aluminum hydroxide = [tex]\rm \dfrac{14}{156}[/tex]
Moles of Aluminum hydroxide = 0.0897 mol.
Thus, the aluminum chloride formed has been:
1 mole Aluminum hydroxide = 1 mole aluminum chloride
0.0897 mole aluminum hydroxide = 0.0897 mole aluminum chloride
The mass of Aluminum chloride formed has been:
0.0897 mole aluminum chloride = [tex]\rm \dfrac{Mass}{266.68}[/tex]
Mass of Aluminum chloride = 0.0897 mol × 266.68 g/mol
Mass of Aluminum chloride = 23.92 grams
The %yield can be given as:
%Yield = [tex]\rm \dfrac{Actual\;yield}{Theoretical\;yield}\;\times\;100[/tex]
The theoretical yield = 23.92 grams
The actual yield = 22 grams
% Yield = [tex]\rm \dfrac{22}{23.92}\;\times\;100[/tex]
% Yield = 91.97%.
The percent yield of aluminum chloride in the neutralization reaction has been 91.97%.
For more information about the neutralization reaction, refer to the link:
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How is a muscle mutation potentially linked to the size of our brain?
Answer:
I found on internet may be it helps
Explanation:
Here, we provide a general review of recent studies into the genetic basis of human brain evolution. The insights gleaned from these studies can be broadly divided into three categories: (i) positive selection on protein-coding regions of the genome that lead to changes in the sequences of existing proteins; (ii) duplication and deletion of genes; and (iii) evolutionary changes in non-coding regions of the genome, especially those in cis-regulatory sequences that lead to altered gene expression .
Choose the correct coefficients to balance the following equation: __CaCO3 + __HC; Produces __CaCl2 + __CO2 + __H2O
Answer:
CaCO3 + 2HCl = CaCl2 + CO2 + H2O
Explanation:
CaCO3 + HCl = CaCl2 + CO2 + H2O
Error in equation should be HCl on left hand side not HC
Left Side
Ca = 1
C = 1
O = 3
H = 1
Cl = 1
Right Side
Ca = 1
C = 1
O = 3
H = 2
Cl = 2
So we'll try and balance the Chlorine
CaCO3 + 2HCl = CaCl2 + CO2 + H2O
Left Side
Ca = 1
C = 1
O = 3
H = 2
Cl = 2
Right Side
Ca = 1
C = 1
O = 3
H = 2
Cl = 2
Yay it worked
Question 1 of 23
The diagram below shows two mugs of coffee mug A and mug B). Both mugs have the same temperature, but mug A contains 30 ml, while mug B contains 5
thermal energy in both mugs?
B
30°C
30°C
.ll Lisa ko
30 ml
5 ml
O Mug A has more thermal energy than mug B
O Mug A has less thermal energy than mug B
O Mug A and B have the same thermal energy
Previous Question
Flag for re
Answer:
mug A has more thermal energy
Explanation:
What are the following equations for each:
1. Ratio of product concentrations reactant concentrations at equilibrium.
2. Ratio of partial pressures of products to partial pressures of reactants (for gas phase reactions only) at equilibrium
3. Ratio of products reactants for the reaction of a weak base with water at equilibrium.
4. The thermodynamic equilibrium constant, calculated from thermodynamic data, not concentrations.
5. The autoionization constant for water (= 1.0 x 10-14).
6. Ratio of products reactants for the reaction of a weak acid with water at equilibrium
Answer: thats alot of reading
Explanation:
I know the correct answer is either a or d. Can anyone explain which one it is and why? CH3C ≡ CCH2CH2Cl is named: a. 1-chloro-3-pentyne b. 5-chloro-2-pentene c. 1-acetylenyl-3-chloropropane d. 5-chloro-2-pentyne
Answer:
D.
Explanation:
CH₃C≡ CCH₂CH₂Cl
Since there are 5 carbons so the suffix used is "pent"
There is a triple bond so its alkyne
So the compound becomes 2-pentyne (2 because the triple bond is with the 2nd carbon)
Then,
The functional group of chlorine is attached with 5th carbon So the compound becomes
5-chloro,2-pentyne
Why is burning fossil fuels negative
Answer:
it causes alot of harm to the earth.
Explanation:
earthquakes
an so on
What is the Log(10^-4)
Answer:
-4
Explanation:
[tex]log 10^{-4} = -4 log 10[/tex]
log 10 = 1
Therefore -4 log 10 = -4 x 1 = -4
At what temperature does the solid start meltin
-20°C
0°C
20"
80°C
Answer:
0 C.
Explanation:
What is the potential energy of the bowling ball as it sits on top of a building?
Answer:
Potential energy is the amount of energy calculated from an object's height off the ground.
Explanation:
Potential energy = Mass x Height x Gravity
how many moles of hydrogen will react with 40g oxygen
Answer: 2.5 moles
2H2 + O2 = 2H2O
This implies that 2 moles of oxygen is needed to react with one mole of oxygen to form 2 moles of water
It also implies that
2 moles of hydrogen requires 32 grams of oxygen
? moles of hydrogen would require 40 g of oxygen
2 x 40/32 = 2.5 moles
What are some lessons from
past epidemics that we can
apply to our current coronavirus pandemic?
Answer:
The 1918 influenza pandemic and 2002-2003 SARS outbreak suggests social distancing measures, communication, and international cooperation are the most effective methods to slow down the coronavirus.
Explanation:
Which of the following is the conjugate base of HPO 2?
O A. H2P04
B. PO 3
C. H3PO4
O D. HAP04
Answer:
A. H2P04
Explanation:
