Answer:
129,66 g
Explanation:
Desde,
Número de moles = concentración * volumen
concentración = 2 M
volumen = 875 ml
Número de lunares = 2 * 875/1000
Número de lunares = 1,75 moles
Número de moles = masa / masa molar
masa molar de hidróxido de calcio = 74.093 g / mol
1,75 moles = masa / 74,093 g / mol
masa = 1,75 moles * 74,093 g / mol
masa = 129,66 g
What are thermal plasmas?
What are thermal plasmas?
Answer:
Plasmas that reach a temperature equal to their surroundings.
Explanation:
I'm studying this right now and took a similar test.
Answer:
Plasmas that reach a temperature equal to their surroundings.
Explanation:
how many grams of hydrogen gas are needed to react with 688 grams of oxygen to make water? (3 sig figs)
Answer:
86 g H₂
Explanation:
The reaction between hydrogen gas (H₂) and oxygen gas (O₂) to produce water (H₂O) is described by the following balanced chemical equation:
2 H₂(g) + O₂(g) → 2 H₂O(g)
As we can see, 2 moles of H₂ reacts with 1 mol of O₂. We have to convert the moles to mass by using the molar mass (MM) of each compound:
MM(H₂) = 1 g/mol x 2 = 2 g/mol
2 moles H₂ = 2 mol x 2 g/mol = 4 g
MM(O₂) = 16 g/mol x 2 = 32 g/mol
1 mol O₂ = 1 mol x 32 g/mol = 32 g
Thus, 4 grams of H₂ reacts with 32 g of O₂. The stoichiometric ratio H₂/O₂ is 4 g H₂/32 g O₂. So, we multiply the stoichiometric ratio by the mass of O₂ we have (688 g) to calculate the grams of H₂ we need:
4 g H₂/32 g O₂ x 688 g O₂ = 86 g H₂
A salt lover decided to flavor her meal by adding 2.50 moles of sodium chloride,
better known as table salt, to her French fries. She has just added
g of salt
to her fries.
a) 5.00
c) 146
d) 6.02 x 1023
b) 58.4
Answer: C, 146
Explanation:
NaCl has a molar mass of 58.44 g/mol.
To change moles to g, we do:
2.50 moles × 58.44 g/mol = 146.1 g, so C
If you try to place the compound on the pan over the flame, what could possibly happen? Explain your answer. [2 marks] anyone please help me!!:(
Answer:
it will probably flame up or explode or maybe start boiling
When Na2O is mixed with Mn(NO3)4 it forms NaNO3 and MnO2. We start with 25.0 g
of sodium oxide and 56.1 g of manganese (IV) nitrate.
How many grams of sodium nitrate can be produced?
Need help with this 1 question ASAP POINTS ADDED
Answer:
Atomic number hopefully this will help
Atomic number
Explanation:
because chemical elements are organized by atomic number, from the element with the lowest atomic number, hydrogen, to the element with the highest atomic number (example of it increasing)The partial pressure of fluorine gas in a 2.00 L container is 0.85 atm while the partial pressure in that same 2.00L container of argon gas is 1350 torr. a) What is the total pressure, in atm? b) What is the mole fraction of argon in the container?
Answer: The total pressure, in atm is 2.62
b. The mole fraction of argon in the container is 0.67.
Explanation:
a) According to Dalton's law, the total pressure is the sum of individual pressures.
[tex]p_{total}=p_A+p_B+p_C...[/tex]
Given : [tex]p_{total}[/tex] =total pressure of gases = ?
[tex]p_{F_2}[/tex] = partial pressure of fluorine = 0.85 atm
[tex]p_{Ar}[/tex] = partial pressure of Argon = 1350 torr = 1.77 atm ( 760 torr = 1atm)
putting in the values we get:
[tex]p_{total}=0.85atm+1.77atm=2.62atm[/tex]
b) According to Raoult's law, the partial pressure of a component at a given temperature is equal to the mole fraction of that component multiplied by the total pressure.
[tex]p_{Ar}=x_{Ar}p_{total}[/tex]
where, x = mole fraction
[tex]1.77atm=x_{Ar}\times 2.62atm[/tex]
[tex]x_{Ar}=0.67[/tex]
The mole fraction of argon in the container is 0.67.
During the daytime, we can see things because the sun is giving off
heat energy
light energy
sound energy
electrical energy
Answer:
light energy
.................
Answer:
light energy
Explanation:
heat does not effect how we see
the sun does not have sound
electrical energy does not effect how we see
2) A student performed the titrations done in this experiment. The student pipetted 25mL of solution that contained saturated calcium hydroxide solution and 0.05 M calcium ions into a flask and then titrated it with 0.103 M HCl. It required 2.77mL of HCl to reach the orange-red end point. Calculate the molar solubility of calcium hydroxide in this solution.
Answer:
5.706x10⁻³M
Explanation:
Based on product solubility of Ca(OH)₂:
Ca(OH)₂(s) ⇆ Ca²⁺ + 2OH⁻(aq)
Ksp = 5.5x10⁻⁶ = [Ca²⁺] [OH⁻]²
Where [Ca²⁺] is 0.05M and [OH⁻] is obtained from the reaction with HCl.
The molar solubility, S, will be:
S = [OH⁻]/2
The [OH-] is:
Moles HCl = Moles OH⁻
2.77x10⁻³L * (0.103mol / L) = 2.85x10⁻⁴ moles OH⁻ in 25mL = 0.025L:
2.85x10⁻⁴ moles OH⁻ / 0.025L = 0.0114M = [OH⁻]
And S is:
0.0114M/2 =
5.706x10⁻³MWhich element is more metallic among beriliyum or calcium? Give reason
Which kind of wind is most likely responsible for the movement of this
weather system from Dallas to St. Louis and then to Pittsburgh?
A. Southern polar easterlig
B. Westerlies
C. Northern polar easterlies
D. Trade winds
SUBMIT
Answer: Westerlies
Explanation:
Answer:
B. Westerlies
Explanation:
I got ir right
2. Have you ever seen a natural event that surprised
you? Why was it surprising?
Answer:
I have seen many lightning storms before. However, one of the most surprising ones was when I was at my house. It was around midnight when I awoke from the sound of lightning in the distance. I was also half awake so this could be another reason this was the most surprising, but lightning struck near my area. i could see the light through my curtains and the sound was loud enough to awake everyone in my house, even the deep sleepers. I practically jumped out of bed.
help me with this pleasee
In the reaction shown, how many moles of HCl are needed to react with 2.4 moles of Al?
2 Al + 6 HCI - 2 AlCl3 + 3 H2
оа
7.2
Ob
6.4
Ос
0.8
d
1.3
е
4.8
Answer:
7.2 moles
Explanation:
Since the equation is balanced, we can use a mole ratio. 6 moles of HCl : 2 moles of Al. Thus, to convert, we simply multiply by 3.
Answer:
7.2 moles of HCl
Explanation:
The balanced reaction equation of the reaction is;
2 Al + 6 HCI ---------> 2 AlCl3 + 3 H2
We can see from the reaction equation that;
6 moles of HCl reacts with 2 moles of Al
Hence;
x moles of HCl reacts with 2.4 moles of Al
x = 6 * 2.4/2
x = 7.2 moles of HCl
Obtaining crude oil for refining is an example of
A. Constructive occupation
B. Extractive occupation
C. Manufacturing occupation
D. Tertiary occupation
E. Service occupation
Answer:
B: extractive occupation
#1 Predict the electron and molecule geometry with 6 bonding domains and a single lone pair.
Bad answers will get reported. Correct answers get 50 points and brainliest!
Answer:
According to VSEPR theory the molecule with six binding domains and single lone pair will have the pentagonal bipyramidal geometry. As it is known that six binding domains means six bonds and a single lone pair means one pyramidal bond, so that it does not repel bonds to a higher extent. Hence, total of seven bonds are required which is provided by the pentagonal bipyramidal geometry. The number of electrons of the molecule will be fourteen 2 from each of the 6 binding domains that makes up to 12 and 2 from the lone pair.
Sulfur,Iodine,.Carbon,Hydrogen put these lowest to highest
Answer:
The order is Hydrogen, Carbon, Sulfur, Iodine
Explanation:
According to the periodic table. The order is Hydrogen, Carbon, Sulfur, Iodine. You can search up an image of a periodic table, it will help you.
Which one of the following is NOT a characteristic of living things. *
Organized
Maintain certain internal conditions
Respond
Have feelings
Answer:
3
Explanation:
Chemistry help equations
Answer:
no reaction will occur .
I just got confessed to
but i only like the person 89% out of 100...
what should I do ?
Answer:
:)haha
Explanation:
Answer:
:D
Explanation:
Which properties describe the elements in group 18?
I. Escribe el tipo de reacción al que pertenece cada una de las siguientes reacciones: a. P4(s) + 3 O2 (g) → 2 P2O3 (g) b. CaCO3 (s) → CaO (s) + CO2 (g) c. Cu (s) + AgNO3 (ac) → CuNO4 (ac) + Ag (s) d. Pb(NO3)2 (ac) + NaI (ac) → PbI2 (s) + 2 NaNO3 (ac) e. FeCl3 + 3 NH4(OH) → Fe(OH)3 + 3 NH4Cl f. N2 + 3 H2 → 2NH3 g. Zn + 2HCl → H2 + ZnCl2 h. 2HgO → 2Hg + O2 i. 2H2(g) + O2 → 2H2O(l) j. 2H2O(l) → 2H2(g) + O2(g) k. Mg(s) + Cu(NO3)2 (ac) → Mg(NO3)2 (ac) + Cu(s) l. 2Na + 2H2O – > 2NaOH + H2 m. H2O + CO2 – > H2CO3 n. 2KClO3 – > 2KCl + 3O2 o. NaCl + LiNO3 – > NaNO3 + LiCl
When one evaporates a pure substance, what would be seen after this evaporation?
Answer:
3
I would like to understand the temperature at which a substance will vaporize when dissolved in a liquid. I have researched this online for hours, but haven't found a conclusive answer. Is it the boiling point of the dissolved substance? I'm attempting to find the temperature at which caffeine vaporizes when dissolved in water or other vegetable glycerin.
Explanation:
I hope this helps a little bit
When an atom loses an electron, the resulting charge on the atom is ____
Answer:
Positive
Explanation:
The atom will gain a positive charge by losing an electron
Answer:
cation
Explanation:
ANYONE HELP MEE!! ASAP!
Answer:
The energy of the molecules in the apple decreased.
Explanation:
A.
whats on the right side ?
Answer:
B) Products
Explanation:
Answer:
B. products
Explanation:
PLEASE ANSWER MY QUESTION
https://brainly.com/question/22082435
1 poin
2) Iron is found in the Earth as iron
oxide (Fe203). Iron oxide is reduced
to produce iron. Balance the equation
for the reaction: ...Fe2O3 + ..... →
.....Fe + .....CO2
Your answer
duehrneidudbeneisubebekeidbdbbe
An experiment was conducted in order to determine the enthalpy change that occurs when 1.0 mole of ice at 0 degrees Celsius melts and becomes 1.0 mole of water at 0 degrees Celsius. The enthalpy change associated with this process is referred to as the heat of fusion of ice. In the experiment a 9.68g sample of ice at 0 degrees Celsius was added to the coffee cup calorimeter containing 278.25 mL of distilled water. The temperature of the water was 22.485 degrees Celsius before The ice was added. The lowest temperature that was recorded after the ice had melted was 19.050 degrees Celsius.
A) find the amount of heat lost or gained by the water in the calorimeter.
B) in this experiment the ice melted and then the temperature of the water produced by the ice increased from 0 degrees Celsius to 19.050 degrees Celsius. Calculate the amount of heat absorbed by the melted ice as it’s temperature increased from 0.000 degrees Celsius to 19.050 degrees Celsius
C) calculate the heat that was gained by the ice during melting process
D) calculate the heat of the fusion of ice
E) is the reaction endothermic or exothermic?
F) energy was transferred from one system to another during this experiment. Identify the two interacting systems and outline the direction of energy flow.
G) was energy conserved in the process? Justify your answer.
Answer: 1
Explanation:
Experiment on enthalpy change.
The enthalpy is a hydrodynamic system that is made to collect the internal energy. The product is of pressure and volume. The experiment was conducted to see the enthalpic change that occurred at a 1.0 mole of ice at 0 degrees.
The answer is 9.68 grams.
The enthalpy change linked with the process is called as a fusion of heat of the ice. The temperature of the water was 278.25 ml hat of distilled water and the calorimeter consisted of 278.35 ml of water.The enthalpy change linked with this process is referred to as the heated fusion of ice. In the experiment a 9.68g sample.Learn more about the experiment was conducted.
brainly.com/question/17376718.
What drives the flow of energy in cycling of matter in the atmosphere
Need done fast please! 41 points
Heat energy provided during phase change is used to:
increase kinetic energy
break intermolecular bonds
break intramolecular bond
decrease kinetic energy
Answer:
I'm not exactly sure but I think it's the first one if I'm wrong tell me so I know and I don't know how I can get points back but if I can figure it out I will tell me if I'm wrong