Answer :]
A.)Calculate the mass of ammonium sulfate that would be obtained by reacting with ammonia acid.
Correct me if i'm wrong :]
does hot ice have to be cold or hot?
Answer:
hot
Explanation:
You'll need to boil the solution, though, to reduce the amount of water so that it is concentrated enough to form crystals. Cook your solution over low to medium heat for about an hour. You want to reduce it down to 1 cup or less.
The number of moles of Cr deposited by passing 1,5 F electricity in following reaction Cr+3e–– ›cr is
The number of moles of Cr deposited by 1.5 F of electricity is 0.5 moles
What is electrolysis?The term electrolysis has to do with thee deposition of a solid when a direct current is passed through its solution.
Given the reaction; Cr3+(aq) + 3e ––›Cr(s)
If 3F of electricity is required to deposit 1 mole of Cr
1.5F of electricity is required to deposit 1.5F * 1 mole/3F
= 0.5 moles
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Give the postional isomers of 2 halopropane
(CH3)2CH
Give the positional isomers of 2 halopropane
(CH3)2CH
answer:
is in file download it
Heat that flows by conduction is the transfer of thermal energy between substances in contact. What must occur for this to happen? A. The two systems must be the same temperature.
B. The two systems must not be touching each another.
C. One system must have higher kinetic energy than the other system.
D. The thermal energy of one system must be the same as the thermal energy of the other system.
Answer:
c. one must have a higher kinetic energy than the other system
Given the unbalanced equation which represents aluminum metals reacting with an acid:
Al + H+ → Al+3 + H₂
What is the total number of moles of electrons lost by 1 mole of aluminium?
There are three number of electrons lost by 1 mole of aluminium because aluminum has +3 charge on it.
What is cation?When an atom loses electron, positive charge appears on the atom this is called cation. In this reaction we can see that aluminium has +3 charge which means that it loses 3 electrons.
So we can conclude that There are three number of electrons lost by 1 mole of aluminium because aluminum has +3 charge on it.
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a mole of pennies would fill up how many 32oz cups?
Answer:
4 cups?
Explanation:
okay so if i fail the first time do i repeat the class? or can my teacher still pass me even if i pass the class but fail the test?
Answer:
It depends on what type of test your speaking of, is it a state exam?
If you are passing a class and fail a test you will still pass. If you fail a class you do not need to take it again if you don't want to but you would have to take another class instead.
What reaction is 2KCLO3 2KCI + 3O2
Answer: Decomposition
Explanation:
chemistry can someone solve this?
eimetchuinsumuleavtubronAnswer:
Explanation:
what type of solution forms when 25g of NaCI are dissolved in 100g of water at 30 degrees c
An unsaturated solution is formed when 25g of NaCI are dissolved in 100g of water at 30 degrees Celsius.
What is an unsaturated solution?A solution is formed as a result of the dissolution of a solute in a solvent.
However, based on the capacity of the solvent to take in more solute, a solution can be of three types namely;
Unsaturated solutionSaturated solutionSupersaturated solutionAn unsaturated solution is a solution whose solvent can dissolve more solute at a particular temperature.
According to this question, 25g of NaCI are dissolved in 100g of water at 30°C, hence, the solvent can take in more solute at 30°C.
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Chemistry B Semester Exam
An unknown substance has a boiling point of 174°C. Which statement is true about this unknown substance? (1 point)
-It has a lower boiling point than water, and it likely has stronger electrostatic forces between its molecules
than water.
-It has a higher boiling point than water, and it likely has stronger electrostatic forces between its molecules
than water.
-It has a lower boiling point than water, and it likely has weaker electrostatic forces between its molecules
than water.
-It has a higher boiling point than water, and it likely has weaker electrostatic forces between its molecules
than water.
Answer:
See below
Explanation:
Boiling point of water is 100 C
this substance is higher boiling point and the molecules are likely with higher e-static forces
The unknown substance has a higher boiling point than water, and it has stronger electrostatic forces between its molecules than water. Therefore, option B is correct.
Boiling point is a measure of the temperature at which a substance changes from a liquid to a gas phase. Substances with higher boiling points generally have stronger intermolecular forces, such as hydrogen bonding or stronger dipole-dipole interactions.
Since the boiling point of the unknown substance is higher than that of water (which boils at 100°C), it suggests that the unknown substance likely has stronger electrostatic forces between its molecules compared to water.
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A scientist stores a very large number of particles in a container. In order to determine the number of particles, the scientist measures the temperature, pressure, and volume of the container and calculates the moles using the ideal gas law. In order for the calculated value to have the greatest accuracy, the scientist should make sure that (select all the apply)
A the temperature is high
B the volume is high
C the pressure is high
D the ideal gas law is always accurate, the conditions will not matter
When the temperature and the volume of the gas stored in the container are high then the number of the moles will be measured accurately. Thus, options A and B are correct.
What is the ideal gas law?The ideal gas law is the establishment of the relation between the elements like the moles, pressure, temperature, and the volume of the gas containing the particle.
The ideal gas states:
PV = nRT
With an increase in the temperature, the number of particles that collides increases as the kinetic energy increases. The particle of the container is more when the volume of the gas is more.
Therefore, in options A and B high temperature and volume increase the accuracy.
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Which statement is correct abound chemical bonding in BF3 molecule O The molecule is not stable and hardly exist since the number of valence electrons around a central atom in a molecule are less than 8 O The molecule is stable and can exist even though the number of valence electrons around central atom in the molecule are less than 8 The molecule is not stable and hardly exist since the number of valence electrons around an atom in a molecule are more than 8 and covalent bonding is not possible None of the above is correct
The molecule is stable and can exist even though the number of valence electrons around central atom in the molecule are less than 8.
Is BF3 molecule stable or not?BF3 molecule is a stable molecule because all the electrons present in the outermost shell of boron are covalently bonded with fluorine. Boron in BF3, three bonds is the maximum possible because boron only has 3 electrons to share.
So we can conclude that the molecule is stable and can exist even though the number of valence electrons around central atom in the molecule are less than 8.
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For the reaction N2O4(g) 2 NO2(g), Kc = 0.21 at 100 C. At a point during the reaction, [N2O4]=0.12 M and [NO2]=0.55M. Is the reaction at equilibrium? If not, in which direction is it progressing?
The equilibrium constant shows the extent to which reactants are converted into products.
In this case, we must find the reaction quotient as follows;
Qc = [0.55]^2/[0.12] = 2.5
Since the Qc > Kc, it means that the reverse direction is favored in this reaction.
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What is the formula for the carboxylic acid functional group?
OA. -CH3
OB. -COH
0 с. -соон
OD. -CO-
Answer: C
Explanation:
This is a fact.
40 points!!!!!!!!!!!!!!!!!!!!!
Answer:
4.041 moles C₂H₆
Explanation:
To convert from grams to moles, you first need to determine the molar mass of C₂H₆. The molar mass is the combination of the atomic masses times the quantity of each element present in the molecule. The atomic masses usually be found on the periodic table. They represent how much the element weighs per one mole.
Carbon (C) Atomic Mass: 12.01 g/mol
Hydrogen (H) Atomic Mass: 1.008 g/mol
Molar Mass (C₂H₆): 2(12.01 g/mol) + 6(1.008 g/mol)
Molar Mass (C₂H₆): 30.068 g/mol
Now that you have the molar mass, you can multiply this ratio to the given value. Keep in mind that in order to go from grams to moles, the numerical value should be place in the denominator of the molar mass ratio. This allows for the cancellation of the unit 'grams'. The final answer should have 4 significant figures because the given value also has 4 sig figs.
121.5 grams C₂H₆ 1 mole
-------------------------- x ------------------------ = 4.041 moles C₂H₆
30.068 grams
The element __ is the most similar to oxygen in chemical and physical properties.
Answer:
the element air is the most similar to oxygen in chemical. and physical properties
0.58 mol of Mg contains how many atoms? please show work
The number of atoms present in 0.58 mole of magnesium, Mg is 3.49×10²³ atoms
Avogadro's hypothesis1 mole of Mg = 6.02×10²³ atoms
How to determine the atoms in 0.58 mole of Mg1 mole of Mg = 6.02×10²³ atoms
Therefore,
0.58 mole of Mg = 0.58 × 6.02×10²³
0.58 mole of Mg = 3.49×10²³ atoms
Thus, 3.49×10²³ atoms are present in 0.58 mole of Mg
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PLEASE HELP!!!
Choose from the given list of aqueous solutions (A-D).
Solution A has [H3O+] = 3.5×10-5 M.
Solution B has [H3O+] = 3.5×10-4 M
Solution C has [OH-] = 1.3×10-10 M
Solution D has [OH-] = 6.2×10-11 M
Which solution is the least acidic?
Which solution has the highest pH?
Which solution is the most basic?
Which solution is the least basic?
Find pH of all
#A
pH=-log[H+]
pH=-log[3.5×10^{-5}]pH=-log3.5+5pH=4.4#B
pH=-log3.5+4pH=3.4#C
pOH=-log[OH]
pOH=-log[1.3×10^{-10}]pOH=-log1.3+109.8pH=
14-9.84.2#4
pOH=-log6.2+11pOH=10.2pH
14-10.23.8So our answers
solution A is least acidicsolution A has the highest pHsolution A is most basicsolution B is least basicWhich of the following items represents a chemical change?
melting
evaporation
freezing
burning
Consider 2.00 moles of Argon, an ideal gas, at a density of 5.00 g/L and a pressure of 2.00 atm. What is the closest value to the temperature (in K) of this gas?
Answer:
194.73 K
Explanation:
Use the Ideal Gas Law: PV = n RT
R = .082057366 L Atm / k-mole
2 moles Argon weigh in at 79.896 gm
79.896 gm / 5 gm/L = 15.9792 Liters
Ideal Gas Law:
(2)(15.9792) = 2 (.082057366) ( K)
194.73 K
Considering 2.00 moles of Argon, an ideal gas, at a density of 5.00 g/L and a pressure of 2.00 atm, the closest value to the temperature of the gas is approximately 39.01 K.
To find the temperature of the gas, we can use the ideal gas law equation:
PV = nRT
In this formula:
P = pressure (in atm)
V = volume (in L)
n = number of moles
R = ideal gas constant (0.0821 L·atm/mol·K)
T = temperature (in K)
Here it is given that:
P = 2.00 atm
V = 1 L
n = 2.00 moles
R = 0.0821 L·atm/mol·K
Now we can rearrange the equation to solve for T:
T = PV / (nR)
Substitute the given values:
T = (2.00 atm) x (16.00 L) ÷ (2.00 moles x 0.0821 L·atm/mol·K)
Calculate:
T ≈ 39.01 K
Thus, the closest value to the temperature of the gas is approximately 39.01 K.
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What is the mass of a cube that has a density of 45g/ml and a volume of 15 ml?
Answer:
675g
Explanation:
The equation that relates mass, density and volume is:
Density = mass ÷ volume
By rearranging the equation we can find the mass of the cube.
Mass = density × volume
Mass = 45 × 15
∴ Mass = 675 grams
Name one similarity and one difference between visible light and sound.
Answer:
Light and sound both are waves, but sound requires a material medium to travel, and hence cannot travel in empty space while light can travel through vacuum but not through opaque materials. Both undergo refraction, diffraction and interference.
Explanation:
The magnet below is cut in half. What will be the result
the cut pieces will have their own north and south pole
Please help!
Given the equation representing a reaction
Which statement explains the energy term in this reaction?
Answer: 3. Mass is lost due to the conversion of mass to energy.
How many moles of aluminum oxide (Al2O3) are produced by reacting 5 moles of iron oxide (FeO)?
2AI+ 3FeO --> 3Fe + 1Al₂O3
Answer:
1.67 moles Al₂O₃
Explanation:
To find the amount of aluminum oxide produced, you need to start with 5 moles FeO and multiply it by the mole-to-mole ratio displaying the relationship between moles FeO and moles Al₂O₃. This ratio incorporates the coefficients from the equation. Remember, make sure to write the ratio in a way that allows for the cancellation of moles FeO.
2 Al + 3 FeO ---> 3 Fe + 1 Al₂O₃
5 moles FeO 1 mole Al₂O₃
-------------------- x ---------------------- = 1.67 moles Al₂O₃
3 moles FeO
How many grams are there in 9.6 x 1025 molecules of H2? Round your final answer to two decimal places.
Answer:
there are 310.64 grams in 9.40×10²⁵ molecules of H₂.
Explanation:
Amount of moles of H₂= (9.6 × 10²⁵ atoms × 1 mole) ÷ 6.023 × 10²³ atoms
amount of moles of H₂ = 155.32 moles
On the other hand, molar mass is the amount of mass that a substance contains in one mole. In this case, the molar mass of H₂ is 2 .
Then the mass that 155.32 mole of compound contains is calculated as:
155.32 moles × 2 = 310.64 grams
Finally, there are 310.64 grams in 9.40×10²⁵ molecules of H₂.
Moles of H_2
[tex]\\ \rm\Rrightarrow \dfrac{No\:of\: molecules}{Avagadro\:no}[/tex]
[tex]\\ \rm\Rrightarrow \dfrac{9.6\times 10^{25}}{6.023\times 10^{23}}[/tex]
[tex]\\ \rm\Rrightarrow 1.594\times 10^{2}[/tex]
[tex]\\ \rm\Rrightarrow 159.39mol[/tex]
Mass
[tex]\\ \rm\Rrightarrow Moles\times molar\:mass[/tex]
[tex]\\ \rm\Rrightarrow 159.39(2)[/tex]
[tex]\\ \rm\Rrightarrow 318.78g[/tex]
In the following acid-base reaction
H₂O is the _
HCI(g) + H₂O(l) →H3O*(aq) + Cl-(aq)

Answer: base
Explanation:
The water accepted another hydrogen ion, making it a base.
In the given acid-base reaction, H₂O (water) is the base because it accepts a proton (H+) from the hydrogen chloride (HCl) molecule and forms hydronium ion (H₃O+) by gaining an extra proton.
What is an acid- base reaction ?An acid-base reaction is a chemical reaction in which an acid reacts with a base to form a salt and water. In such a reaction, the acid donates a proton (hydrogen ion) to the base, which accepts the proton. The transfer of a proton from the acid to the base leads to the formation of the conjugate base of the acid and the conjugate acid of the base.
In general, an acid is a substance that donates a proton (H+) and a base is a substance that accepts a proton. When an acid and a base react, the resulting products are a conjugate acid-base pair, where the acid is the product that has gained a proton and the base is the product that has lost a proton.
In the given acid-base reaction, H₂O (water) is the base because it accepts a proton (H+) from the hydrogen chloride (HCl) molecule and forms hydronium ion (H₃O+) by gaining an extra proton.
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describe a weather station that will be used to collect weather data it should collect data that are needed to make forecasts. explain what data are needed how the station would be powered and any other relevant information . Then sketch it out
(please draw a sketch arigato)
The weather station is a place which contain instrument that collect data of atmospheric pressure, wind, humidity, etc to forecast weather. The weather station is powered by solar power.
What is a weather station?A weather station is a place that measure atmospheric conditions, on the basis of temp., pressure, wind speed, etc conditions.
They can be based either in land or sea. They are necessary to forecast any disaster, so we can prepare for the disaster.
Thus, the weather station is a place which contain instrument that collect data of atmospheric pressure, wind, humidity, etc to forecast weather. The weather station is powered by solar power.
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You have now identified whether crabs are able to see plankton they eat near the ocean floor. Based on your answer, explain how this information can be used to help the Australian Institute of Marine Biology further to understand the environment of the ocean floor (what other organisms live at the bottom? How are these able to see their food/ attract food to survive?
They are able to find out more organisms which are present at the bottom of the sea due to their accomplishment.
How this information can be used to help to understand the environment of the ocean floor?This information can be used to help the Australian Institute of Marine Biology further to understand the environment of the ocean floor because they are able to see the seas floor and can find out other creatures as well.
So we can conclude that they are able to find out more organisms which are present at the bottom of the sea due to their accomplishment.
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