Answer:
Explanation:
The average atomic mass (sometimes called atomic weight) of an element is the weighted average mass of the atoms in a naturally occurring sample of the element. Average masses are generally expressed in unified atomic mass units (u), where 1 u is equal to exactly one-twelfth the mass of a neutral atom of carbon-12.
What is the mass, in grams, of 0.0490 mol of iron(III) phosphate
Answer:
m = 7.39 g.
Explanation:
Hello!
In this case, since the molar mass of iron (III) phosphate is 150.82 g/mol based on its molecular formula (FePO₄), we can compute the mass in grams of 0.0490 moles of this compound by setting up the following dimensional analysis:
[tex]m=0.0490mol*\frac{150.82g}{1mol} \\\\m=7.39 g[/tex]
Best regards!
Which characteristic is used to classify metamorphic rocks as foliated or non-foliated?
Answer: d. Arrangement of grains
Explanation:
Edge:)))
Why do you think it rains more in west Ferris than in east Ferris
Answer:
This idea helps students explain why more rain forms over West Ferris than East Ferris. ... Therefore, when students explain that water vapor condenses higher in the atmosphere, they are actually explaining that water vapor condenses high in the troposphere, which is relatively low in the atmosphere.
Explanation:
If a dog has a mass of 21.3 kg, what is its mass in the following units? Use scientific notation in all of
your answers.
(a) What is the dog's mass in grams?
eBook
x 10
g
Ask
(b) What is the dog's mass in milligrams?
Print
x 10
mg
References
(C) What is the dog's mass in micrograms?
x 10
ug
1. Which of the following elements has the smallest ionization energy
a. arsenic
b. nitrogen
c. bismuth
d. chlorine.
Answer:
chlorine
Explanation:
hope this helps
How many moles are in 60.0 grams of water?
3.33 mol H₂O
General Formulas and Concepts:Math
Pre-Algebra
Order of Operations: BPEMDAS
Brackets Parenthesis Exponents Multiplication Division Addition Subtraction Left to RightChemistry
Atomic Structure
Reading a Periodic TableUsing Dimensional AnalysisExplanation:Step 1: Define
60.0 g H₂O (Water)
Step 2: Identify Conversions
Molar Mass of H - 1.01 g/mol
Molar Mass of O - 16.00 g/mol
Molar Mass of H₂O - 2(1.01) + 16.00 = 18.02 g/mol
Step 3: Convert
Set up: [tex]\displaystyle 60.0 \ g \ H_2O(\frac{1 \ mol \ H_2O}{18.02 \ g \ H_2O})[/tex]Multiply: [tex]\displaystyle 3.32963 \ mol \ H_2O[/tex]Step 4: Convert
Follow sig fig rules and round. We are given 3 sig figs.
3.32963 mol H₂O ≈ 3.33 mol H₂O
butyric acid has a putrid odor like rancid butter. If you got some of this material on your hands, how could you remove the odor
Answer:
The correct answer would be - the easiest way is to wash with some polar solvent or salt solution or soap and water
Explanation:
Butyric acid is a carboxylic acid that has a putrid odor like rancid butter. If an individual touch this chemical will have the same odor on his hand and to get rid of it one should wash his hand with a polar solvent such as methanol, or salt solutions such as like NaHCO3, or soap and water that will form sodium butyrate that has no smell and easily dissolve and remove.
Thus, the easiest way is to wash with some polar solvent or salt solution or soap and water
HURRY HELP 10 POINTS ILL GOVE BRAINLIEST I HAVE TO PASS PICTURE PROVIDED
Answer:
C₃H₄O₄
Explanation:
In order to get the empirical formula of a compound, we have to follow a series of steps.
Step 1: Divide the percent by mass of each element by its atomic mass.
C: 34.6/12.01 = 2.88
H: 3.9/1.01 = 3.86
O: 61.5/16.00 = 3.84
Step 2: Divide all the numbers by the smallest one, i.e., 2.88
C: 2.88/2.88 = 1
H: 3.86/2.88 ≈ 1.34
O: 3.84/2.88 ≈ 1.33
Step 3: Multiply all the numbers by a number that makes all of them integer
C: 1 × 3 = 3
H: 1.34 × 3 = 4
O: 1.33 × 3 = 4
The empirical formula is C₃H₄O₄.
Complete combustion of 3.10 g of a hydrocarbon produced 9.90 g of CO2 and 3.55 g of H2O. What is the empirical formula for the hydrocarbon
Answer: C9H16
Explanation:
molar mass C = 12.011, H = 1.008, O = 15.999, CO2 = 44.01, H2O = 18.00
9.9g CO2 = 0.225 mol, 3.55 g H2O = 0.200 mol
long way
molecules CO2 = 1.355x10^23 —> atoms of C
molecules H2O = 1.204x10^23 —> molecules H2
C:H2 = 1.355/1.204 = 1.125. —> C9H16
short way
molar massesCO2:H2O = 0.225:0.2 = 9:8
–> C9H16
verify
molar mass C9H16 =124
3.1g = 0.025 mol
oxidise C9H16 + 13O2 —> 9CO2 + 8H2O
0.025 mol + 13*0.025 mol (0.35mol) —> 9*0.025 + 8*0.025 —> 0.0.225 + 0.2
What would the mass be, in grams, of 0.89 moles of Cl2?
Answer:
Mass = 63.19 g
Explanation:
Given data:
Number of moles = 0.89 mol
Mass of Cl₂ = ?
Solution:
Formula:
Number of moles = mass/molar mass
Molar mass of Cl₂ = 71 g/mol
by putting values,
0.89 mol = mass/ 71 g/mol
Mass = 0.89 mol × 71 g/mol
Mass = 63.19 g
7. Sometimes, especially in the clinical lab, concentrations will be expressed in percentage rather than molarity. The percentage concentration refers to the number of grams of solute dissolved in 100 ml of solution (eg. a 5 % solution of sucrose contains 5 g of sucrose in 100 ml of water). Normal saline, a solution that is isotonic with human blood, is a 0.85 percent solution of sodium chloride. What is the molar concentration of normal saline
Answer:
The molar concentration of normal saline is 0.15 mol/L.
Explanation:
The mass of NaCl in 0.85% of normal saline is:
[tex] 0.85 \% = \frac{0.85 g}{100 ml} [/tex]
[tex] m_{NaCl} = 0.85 g [/tex]
The molar concentration can be found using the following equation:
[tex] C = \frac{n}{V} [/tex]
So we need to find the number of moles of NaCl in 1 liter of solution.
[tex]m_{NaCl} = \frac{0.85 g}{100 mL}*\frac{1000 mL}{1 L}*1 L = 8.5 g[/tex]
[tex]n = \frac{m_{NaCl}}{M}[/tex]
Where:
M: is the molar mass of NaCl = 58.44 g/mol
[tex] n = \frac{8.5 g}{58.44 g/mol} = 0.15 moles [/tex]
Hence, the molar concentration is:
[tex]C = \frac{0.15 moles}{1 L} = 0.15 mol/L[/tex]
Therefore, the molar concentration of normal saline is 0.15 mole per liter.
I hope it helps you!
A student adds 34.2 mL of water to 72.3 mL of a 7.50 M glucose solution. (i) Will this solution be concentrated or dilute
Answer:
The solution will be dilute
Explanation:
The concentration of a solution is defined as the ratio between an amount of solute (Glucose, in this case) and an amount of solvent (Water in this case).
As the student is adding some water (Solvent), the amount of solute per amount of solvent will decrease. That is, if the concentration decreases,
the solution will be dilute
1. Which compound is composed of the most atoms?
A. H2SO4 B. Li2N C. Mg(OH)2 D. NaF
H₂SO₄ is composed of the most atoms
Further explanationGiven
Compounds of A. H2SO4 B. Li2N C. Mg(OH)2 D. NaF
Required
The most atoms
Solution
Compounds are composed of atoms of the same or different types
The number of atoms can be indicated from the subscript of each of the constituent atoms of the compound
A. H₂SO₄ : 2 atoms H, 1 atom S, 4 atoms O = 7 atoms
B. Li₂N : 2 atoms L, 1 atoms N = 3 atoms
C. Mg(OH)₂ : 1 atom Mg, 2 atoms O, 2 atoms H = 5 atoms
D. NaF : 1 atom Na, 1 atom F = 2 atoms
A 25.0 mL sample of 0.25 M potassium carbonate (K2CO3) solution is added to 30.0 mL of a 0.40 M barium nitrate (Ba(NO3)2) solution. What is the concentration of the excess metal ion after the precipitation reaction is complete
Answer:
0.10M of Ba²⁺ is the concentration of the metal in excess
Explanation:
Based on the chemical reaction:
K₂CO₃(aq) + Ba(NO₃)₂(aq) → BaCO₃(s) + 2KNO₃(aq)
1 mole of potassium carbonate reacts per mole of barium nitrate
To solve this question we need to find the moles of each salt to find then the moles of Barium in excess:
Moles K₂CO₃:
0.025L * (0.25mol / L) = 0.00625moles K₂CO₃ = moles CO₃²⁻
Moles Ba(NO₃)₂:
0.030L * (0.40mol/L) = 0.012 moles of Ba(NO₃)₂ = 0.012 moles of Ba²⁺
That means moles of Ba²⁺ that don't react are:
0.012 mol - 0.00625mol = 0.00575 moles Ba²⁺
In 25 + 30mL = 55mL:
0.00575 moles Ba²⁺ / 0.055L =
0.10M of Ba²⁺ is the concentration of the metal in excessThe concentration of the excess metal ion after the precipitation reaction is complete is 0.1045 M
From the question,
We are to determine the concentration of the excess metal ion after the precipitation reaction is complete
First, we will write the balanced chemical equation for the reaction
The balanced chemical equation for the reaction is
K₂CO₃ + Ba(NO₃)₂ → BaCO₃ + 2KNO₃
This means
1 mole of K₂CO₃ is required to react completely with 1 mole of Ba(NO₃)₂
Now, we will determine the number of moles of each reactant present.
For K₂CO₃Volume = 25.0 mL = 0.025 L
Concentration = 0.25 M
Using the formula
Number of moles = Concentration × Volume
∴ Number of moles of K₂CO₃ present = 0.25 × 0.025
Number of moles of K₂CO₃ present = 0.00625 mole
For Ba(NO₃)₂Volume = 30.0 mL = 0.03 L
Concentration = 0.40 M
∴ Number of moles of Ba(NO₃)₂ present = 0.40 × 0.03
Number of moles of Ba(NO₃)₂ present = 0.012 mole
Since
1 mole of K₂CO₃ is required to react completely with 1 mole of Ba(NO₃)₂
Then,
The 0.00625 mole of K₂CO₃ will react with 0.00625 mole of Ba(NO₃)₂
∴ Only 0.00625 mole of the Ba(NO₃)₂ will react
This means Ba(NO₃)₂ is the excess reactant.
Now, we will determine the number of moles of Ba(NO₃)₂ remaining
Number of moles of Ba(NO₃)₂ remaining = 0.012 mole - 0.00625 mole
Number of moles of Ba(NO₃)₂ remaining = 0.00575 mole
Now, for the concentration
Using the formula
[tex]Concentration = \frac{Number\ of\ moles}{Volume}[/tex]
Volume = Total volume of the solution = 0.025L + 0.03L
Volume = 0.055 L
∴ Concentration of the excess metal ion = [tex]\frac{0.00575}{0.055}[/tex]
Concentration of the excess metal ion = 0.1045 M
Hence, the concentration of the excess metal ion after the precipitation reaction is complete is 0.1045 M
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If a steel container holds 3.50 moles of hydrogen gas and 3.50 moles of helium gas, and the total pressure is 4.00 atm., what is the partial pressure of each of the gases
Answer:
1. Partial pressure of H₂ = 2 atm
2. Partial pressure of He = 2 atm
Explanation:
The following data were obtained from the question:
Mole of H₂ = 3.50 moles
Mole of He = 3.50 moles
Total pressure (Pₜ) = 4 atm
Partial pressure of H₂ =?
Partial pressure of He =?
Next, we shall determine the mole fraction of each gas this can be obtained as follow:
Mole of H₂ = 3.50 moles
Mole of He = 3.50 moles
Total mole = Mole of H₂ + Mole of He
Total mole = 3.50 + 3.50
Total mole = 7 moles
Mole fraction of H₂ = mole of H₂ / Total mole
Mole fraction of H₂ = 3.5/7
Mole fraction of H₂ = 0.5
Mole fraction of He = mole of He / Total mole
Mole fraction of He = 3.5/7
Mole fraction of He = 0.5
1. Determination of the partial pressure of H₂.
Mole fraction of H₂ = 0.5
Total pressure (Pₜ) = 4 atm
Partial pressure of H₂ =?
Partial pressure of H₂ = Mole fraction of H₂ × Pₜ
Partial pressure of H₂ = 0.5 × 4
Partial pressure of H₂ = 2 atm
2. Determination of the partial pressure of He.
Total pressure (Pₜ) = 4 atm
Partial pressure of H₂ = 2 atm
Partial pressure of He =?
Total pressure (Pₜ) = Partial pressure of H₂ + Partial pressure of He
4 = 2 + Partial pressure of He
Collect like terms
Partial pressure of He = 4 – 2
Partial pressure of He = 2 atm
3.25 x 10^24 molecules of dinitrogen pentoxide would be how many moles?
5.40 mol N₂O₅
General Formulas and Concepts:Math
Pre-Algebra
Order of Operations: BPEMDAS
Brackets Parenthesis Exponents Multiplication Division Addition Subtraction Left to RightChemistry
Atomic Structure
Using Dimensional AnalysisAvogadro's Number - 6.022 × 10²³ atoms, molecules, formula units, etc.Explanation:Step 1: Define
3.25 × 10²⁴ molecules N₂O₅
Step 2: Identify Conversions
Avogadro's Number
Step 3: Convert
Set up: [tex]\displaystyle 3.25 \cdot 10^{24} \ molecules \ N_2O_5(\frac{1 \ mol \ N_2O_5}{6.022 \cdot 10^{23} \ molecules \ N_2O_5})[/tex]Multiply: [tex]5.39688 \ mol \ N_2O_5[/tex]Step 4: Check
Follow sig fig rules and round. We are given 3 sig figs.
5.39688 mol N₂O₅ ≈ 5.40 mol N₂O₅
To what temperature must an ideal gas at 27 o C be cooled to reduce its volume by 1/3
Answer:
28 oc
Explanation:
can you make energy with ionized particles? yes or no and how
please help this is due today which ones are reactive and which arent?
Answer:
I' really don't know I'm sorry
When color changes from yellow to brown, what has happened?
Answer:
its a diffrent color :)
Explanation:
The diagram shows four different locations in an atom.
2
Nucleus
3
7
4
Which locations are likely to have subatomic particles with the LEAST mass? (3 points)
a
1 and 2
b
2 and 3
с
1 and 4
Od
3 and 4
The locations with subatomic particles with the least mass are locations 1 and 4.
An atom is usually divided into two main regions:
The nucleus: This is shown in the diagram with the numbers 2 and 3, and contains protons and neutrons.The outer region: This region includes everything outside the nucleus, and in this region, it is expected to find electrons.The three sub-particles previously mentioned (neutrons, protons, and electrons) differ not only in their location but also in their mass. Indeed, electrons have a lower mass if compared to neutrons and protons.
Based on this, the outer region (locations 1 and 4) has sub particles with the least mass.
Learn more about atom in: https://brainly.com/question/13981855
Answer:
1 and 4
Explanation:
took the test
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Gaseous butane CH3CH22CH3 reacts with gaseous oxygen gas O2 to produce gaseous carbon dioxide CO2 and gaseous water H2O. What is the theoretical yield of carbon dioxide formed from the reaction of 3.49g of butane and 17.1g of oxygen gas
Answer:
10.56 g
Explanation:
C4H10(g) + 13/2O2 (g) -------> 4CO2(g) + 5H2O(l)
Number of moles of butane = 3.49g/ 58 g/mol = 0.06 moles
1 mole butane yields 4 moles of CO2
0.06 moles of butane = 0.06 × 4/1 = 0.24 moles of CO2
Number of moles of oxygen = 17.1g/32g/mol = 0.53 moles of oxygen
6.5 moles of oxygen yields 4 moles of CO2
0.53 moles of oxygen yields 0.53 × 4/6.5 =0.33 moles of CO2
Butane is the limiting reactant
Theoretical yield of CO2 = 0.24 moles × 44g/mol = 10.56 g
Which ball has the greatest potential energy?
Ball A
Ball B
Ball
All of the balls have the same amount of potential energy
a ______ is a single kind of matter that has a specific composition.
Answer:
SUBSTANCE
Explanation:
hope that help you thanx
which of the following is a strong acid?
A, HCI (hydrochloric acid)
B, HF (hydrofluoric acid)
C, NaOH (sodium hydroxide)
D, NH3 (ammonia)
Answer:
A) HCI( hydrochloric acid)
Explanation:
HCI is a strong acid because it has more number of hydrogen ions whereas acetic acid contains less number of hydrogen ions so its a weak acid
Write out an example of a single replacement reaction involving silver and zinc.
Answer:
whats zinc?
Explanation:
I need to fix the equations
Answer:
try looking the equations or find a calulator for those type of eqautions
Explanation:
What are the amount of moles in 12.15 grams of Magnesium?
Draw the Lewis structures for three resonance forms of the nitrate ion, NO−3 . Include electron lone pairs, and any formal charges.
Answer:
See explanation
Explanation:
The nitrate ion is a polyatomic ion. It means that the nitrate ion contains more than one atom. These atoms are one nitrogen atom and three oxygen atoms.
However, we can not fully describe the bonding in the nitrate ion using one structure. I have shown three resonance structures that describe the bonding in the nitrate ion in the image attached to this answer.
When does a chemical bond form between two atoms? Select one :
O a. When attractive forces are greater than repulsive forces.
O b. When potential energy is lowest for the pair.
O c. When potential energy is greatest for the pair .
O d. When repulsive forces are greater than attractive forces.