.How many grams of NaCl required to form a 500ml solution with a molarity of 0.5M , the molar mass of NaCl is 58.5g/mol?
A balloon that can hold 85 L of air is inflated with 3.5 moles of gas at a pressure of 1.0 atmosphere. What is the temperature of the balloon?
Answer:
295.96 K ( = 22.81 degrees C)
Explanation:
PV = n RT R = .082057 L-Atm / (K-Mol) n = 3.5 P = 1 atm V = 85 liters
(1)(85) = 3.5 (.082057)(T)
solve for T = 295.96 K
A sample of 10.5g of Nirtogen reacts with 20.2g of Hydrogen to produce ammonia.
3H2(g)+N2(g)=2NH3(g)
a. What is the theoretical yield of ammonia?
b. What is the limiting reactant?
c. What is the excess reactant?
d. How much is the excess reactant?
e. If 4.1 g of ammonia is actually produced, what is the precent yield?
Answer:
Explanation:
a) The mass of the reactants is 10.5 + 20.2 = 30.7, so the theoretical yield of ammonia is also 30.7 grams (by the law of conservation of mass)
b) The gram-formula mass of diatomic nitrogen is about 28.014 g/mol, so 10.5 grams of nitrogen is 10.5/28.014 = 0.37 moles. In comparison, the gram-formula mass of diatomic hydrogen is about 2.016 g/mol, so 20.2 grams of hydrogen is about 20.2/2.016 = 10.0 moles. Dividing this by 3, we get 3.33 moles. So, nitrogen is the limiting reactant.
c) Hydrogen
d) 0.37 moles of nitrogen is consumed, so (0.37)(3) = 1.11 moles of hydrogen is consumed. This means that 3.33-1.11=2.22 moles of hydrogen are remaining, which has a mass of (2.22)(2.016)=4.47 grams.
e) (actual)/(theoretical) * 100 = (4.1)/(30.7) * 100 = 13%
Easy question
Who is the youngest in ateez
Answer: jongho
Explanation:
Answer:
Choi JongHo
Explanation:
What is the name of this molecule?
H
O A. Propene
• B. Butene
C. Butane
D. Propane
Answer:
D
explaination:
the "prop" stands for three carbons , and this is an alkane so that means it only has single bonds between carbon and hydrogen , hence the name propane
Which of the following statements is correct for precipitation
reaction?
A. All the products must be insoluble.
B. At least one of the products is insoluble.
C. All the reactants must be insoluble.
D. At least one of the reactants must be insoluble.
Answer:
B. At least one of the products is insoluble.
Explanation:
Precipitation reaction :
A chemical reaction occurring in an aqueous solution where two ionic bonds combine, resulting in the formation of an insoluble salt. These insoluble salts formed in precipitation reactions are called precipitates.
What type of heat transfer does not need to travel through matter?.
How/why do acids and bases different from weak acids and bases?
Answer:
Weak acids and bases are less than 100% ionized in aqueous solution
Explanation:
hope this helps
pls mark brainliest
Speed is defined as __________.
A) the change in position and direction over time
B) the change in acceleration over time
C) the change in velocity over time
D) the distance traveled over time
Answer:D)
Explanation: the distance traveled over time
A molecule that is _____ loses electrons, and a molecule that is _____ gains electrons. oxidized; reduced negative; positive reduced; oxidized weak; polar None of the other answer options is correct.
Answer:
Oxidized, and reduced
Explanation:
The acronym LEO, and GER may be helpful, or think of a specific example (such as a copper 2+ ion being reduced into copper).
Loose
Electron
Oxidization
Gain
Electron
Reduction
from this, we know that a molecule which looses electrons is being oxidized, and a molecule that gains electrons is being reduced.
what is after gallium on the periodic table?
Answer:
Germanium or Ge
Explanation:
It is on the perioidic table. Gallium has an atomic number of 31 and Germanium has an atomic number of 32.
Where does most regular lightning occur?
A. The stratosphere
B. The troposphere
C. The Mesosophere
Answer:
the troposphere because we are living in atmosphere when the atmosphere next troposphere the sudden flashes of light and discharge resulting atmosphere condition sound waves of trambeling
thank you
Which is best supported by the data in the chart
Answer:
B
Explanation:
a. Two possible Lewis electron-dot diagrams for CO2 are shown above. Explain in terms of formal charges why diagram Z is the better diagram.
b. Identify the hybridization of the valence orbitals of the C atom in the CO2 molecule represented in diagram Z.
The carbon atom is SP hybridized while the oxygen atom is SP2 hybrized.
What are resonance structures?The term resonance structures are those structures that can be used to explain the bonding in a molecule. Sometimes, a single structure is insufficient in explaining the structure of a compound.
Now looking at the two sturctures, Z is better because there are mo formal charges which make the molecle less stable unlike in X. In the CO2 molecule, the carbon atom is SP hybridized while the oxygen atom is SP2 hybrized.
Learn kire about hydridization of atoms: https://brainly.com/question/5637463
2C₂H₂(g) + 5O₂(g) —> 4CO₂(g) +2H₂O(g)
b. How many moles of H₂O are produced when 64.0g C₂H₂ burns in oxygen?
Calculate the volume occupied by 56. 5 g of argon gas at stp.
Answer:
39.95 hope this helps
Explanation:
what is the molarity of a solution that contains 1.25 moles of K2SO4 dissolved into water to make 1.5 liters of solution?
Answer: 0.8 M
Explanation:
molarity = (moles of solute)/(liters of solution) = 1.25/1.5 = 0.8 M
The diagram below shows the different phase transitions that occur in matter.
Three bars are shown labeled Solid, Liquid, and Gas. They are connected by arrows labeled 1 to 6. Arrow 1 points from liquid to gas; arrow 2 from solid to liquid, arrow 3 from solid to gas, arrow 4 from gas to liquid, arrow 5 from liquid to solid, and arrow 6 from gas to solid.
Which arrow would most likely represent the phase change that occurs when silver is poured into a mold and cools to become a solid bar?
1
3
4
5
Answer:
# 5
Explanation:
The question describes silver being "poured" into a mold and cools to become a solid bar. This is the phase of liquid to solid. When a element cools down below it's freezing points to become a solid.
Liquid to Solid Definition:
Freezing, or solidification, is a phase transition in which a liquid turns into a solid when its temperature is lowered to or below its freezing point. All known liquids, except helium, freeze when the temperature is low enough.
According to the brønsted–lowry definition of acids-base reaction, acids have the ability to.
Answer:
gain, or accept, a hydrogen cation
Explanation:
Hope this helps! :)
2. How many grams of CaCl₂ are needed to prepare 125 mL of a 2.00 M solution of aqueous CaCl₂(aq)?
(M, molarity)
Answer:
The solution contains 0.50 mol or 55 g of CaCl2.
Explanation:
Please Hurry!!!!
What happens during reduction?
Loss of electrons
Gain of electrons
Loss of protons
Gain of protons
Answer:
The answer is Gain of electrons
Explanation:
Oxidation is the process of losing an electrons, while reduction is the process of gaining them.
Answer:
Gain of electrons
2.00 L of 0.800 M NaNO3 must be prepared from a solution known to be 2.50 M in concentration.How many mL are required? Plus don't send me virus links!!!! pls explain how to do it
Answer:
1.36 × 10³ mL of water.
Explanation:
We can utilize the dilution equation. Recall that:
[tex]\displaystyle M_1V_1= M_2V_2[/tex]
Where M represents molarity and V represents volume.
Let the initial concentration and unknown volume be M₁ and V₁, respectively. Let the final concentration and required volume be M₂ and V₂, respectively. Solve for V₁:
[tex]\displaystyle \begin{aligned} (2.50\text{ M})V_1 &= (0.800\text{ M})(2.00\text{ L}) \\ \\ V_1 & = 0.640\text{ L} \end{aligned}[/tex]
Therefore, we can begin with 0.640 L of the 2.50 M solution and add enough distilled water to dilute the solution to 2.00 L. The required amount of water is thus:
[tex]\displaystyle 2.00\text{ L} - 0.640\text{ L} = 1.36\text{ L}[/tex]
Convert this value to mL:
[tex]\displaystyle 1.36\text{ L} \cdot \frac{1000\text{ mL}}{1\text{ L}} = 1.36\times 10^3\text{ mL}[/tex]
Therefore, about 1.36 × 10³ mL of water need to be added to the 2.50 M solution.
Elements strontium and beryllium sboth form a bond with fluorine with similar chemical formulas the similartiy in their formulas is due to:_________
Answer:
having the same number of valence electrons
Explanation:
When 20.00 mL of an unknown monoprotic acid is titrated with 0.125 M NaOH, it takes 15.00 mL to reach the endpoint. What is the molarity of the unknown acid?
Answer:
About 0.0940 M.
Explanation:
Recall that NaOH is a strong base, so it dissociates completely into Na⁺ and OH⁻ ions. Because the acid is monoprotic, we can represent it with HA. Thus, the reaction between HA and NaOH is:
[tex]\displaystyle \text{HA}_\text{(aq)} + \text{OH}^-_\text{(aq)} \longrightarrow \text{H$_2$O}_\text{($\ell$)} + \text{A}^-_\text{(aq)}[/tex]
Using the fact that it took 15.00 mL of NaOH to reach the endpoint, determine the number of HA that was reacted with:
[tex]\displaystyle \begin{aligned} 15.00\text{ mL} &\cdot \frac{0.125\text{ mol NaOH}}{1\text{ L}} \cdot \frac{1\text{ L}}{1000\text{ mL}} \\ \\ &\cdot \frac{1\text{ mol OH}^-}{1\text{ mol NaOH}} \cdot \frac{1\text{ mol HA}}{1\text{ mol OH}^-}\\ \\ & = 0.00188\text{ mol HA}\end{aligned}[/tex]
Therefore, the molarity of the original solution was:
[tex]\displaystyle \left[ \text{HA}\right] = \frac{0.00188\text{ mol}}{20.00\text{ mL}} \cdot \frac{1000\text{ mL}}{1\text{ L}} = 0.0940\text{ M}[/tex]
In conclusion, the molarity of the unknown acid is about 0.0940 M.
I have 0.445 L of a 1.8 M NaCl solution. If I boil away some water until the volume of the solution reaches 0.250 L, what will the new molarity of the solution become?
Answer:
3.2 M
Explanation:
M1V1=M2V2
1.8*.445=.801
.801/.25=3.204
Molarity = M2 = 3.2 M
how many sulfer is in h2s
Answer:
H2S is a hydride of sulfur while SO2 is an oxide of sulfur.
Explanation:
A sample of CH3OH(g) is placed in the previously evacuated vessel with a pressure of P1 at 600 K. What is the final pressure in the vessel after the reaction is complete and the contents of the vessel are returned to 600 K
For a sample of CH3OH(g) is placed in the previously evacuated vessel with a pressure of P1 at 600 K, the final pressure in the vessel is
Pt=3P1
What is the final pressure in the vessel after the reaction is complete and the contents of the vessel are returned to 600 K?Generally, the Chemical reaction is given as
CH3OH----->CO +2H2
Therefore, The pressure P1 doubled at the product side of the reaction
In conclusion, the final pressure in the vessel at 600k
Pt=P1+P2
Pt=3P1
Read more about Chemical reaction
https://brainly.com/question/16416932
PLEASE HELP NEED ANSWER QUICK
An evacuated cylinder has a volume of 50 liters. If 20 liters of nitrogen gas and 20 liters of oxygen gas are pumped into this evacuated cylinder, how much of the cylinder is filled with the two gases? (3 points)
Only 80 percent because only 40 out of 50 liters are used.
The entire container because gases will expand to fill it.
Only 80 percent because of the low molecular weight of the two gases.
The entire container because of the low molecular weight of the two gases.
Answer: The entire container because gases will expand to fill it.
Explanation:
An atom of which element reacts with an atom of hydrogen to form a bond with the greatest degree of polarity?
A. carbon
B. fluorine
C. nitrogen
D. oxygen
Which term describes this reaction?
O addition
O condensation
O elimination
O substitution
Answer:
addition
Explanation:
I really don't know why