Answer:
Explanation:
Sorry, I don't really know about this. I hope it helps!
How many moles are in 5.34 x 10*21 particles of Nitrogen?
A bone contains 6.25% of Carbon -14 it began with. How old is the bone ?
Answer:
Is there a multiple choice??
Explanation:
pls help
Plot the point (5,9)
Is salt water considered a mixture or a solution?
Answer: Salt water is a solution because it has these two characteristics: it has the same concentration of each of its parts throughout the solution, and it can be separated by some physical process.
Explanation: Literally learning about this in my science class XD
n a volumetric analysis experiment, a solution of sodium oxalate (Na 2C 2O 4) in acidic solution is titrated with a solution of potassium permanganate (KMnO 4) according to the following balanced chemical equation: 2KMnO4(aq) + 8H2SO4(aq) + 5Na2C2O4(aq) → 2MnSO4(aq) + 8H2O(l) + 10CO2(g) + 5Na2SO4(aq) + K2SO4(aq) It required 40.0 mL of 0.0335 M KMnO4 to reach the endpoint. What mass of Na2C2O4 was present initially?
Answer:
mNa₂C₂O₄ = 0.4489 g
Explanation:
This is a problem of stechiometry. in this case, we need to find the mole ratio between the permanganate solution and the oxalate. This can be seen in the balanced reaction which is the following:
2KMnO₄ + 8H₂SO₄ + 5Na₂C₂O₄---> 2MnSO₄ + 8H₂O + 10CO₂ + 5Na₂SO₄ + K₂SO₄
According to this balanced reaction, we have a mole ratio of 2:5 between permanganate and oxalate, so, the first thing to do here is calculate the moles of the permanganate needed to reach the endpoint of this titration:
n = M * V
Replacing we have:
nKMnO₄ = 0.0335 mol/L * 0.040 L = 0.00134 moles
With these moles, and the above mole ratio, we can determine the moles of the oxalate:
2 moles KMnO₄ -------> 5 moles Na₂C₂O₄
0.00134 moles ---------> X
X = 0.00134 * 5 / 2
nNa₂C₂O₄ = 0.00335 moles
Finally, with the molecular mass of Na₂C₂O₄, we can determine the mass of the oxalate:
Molecular weights:
Na: 23 g/mol; C: 12 g/mol; O: 16 g/mol
MMNa₂C₂O₄ = (23*2) + (2*12) + (4*16) = 134 g/mol
mNa₂C₂O₄ = nNa₂C₂O₄ * MM
mNa₂C₂O₄ = 0.00335 * 134
mNa₂C₂O₄ = 0.4489 gHope this helps
How do most animals produce offspring
Answer:
Some animals produce offspring through asexual reproduction while other animals produce offspring through sexual reproduction. Both methods have advantages and disadvantages. Asexual reproduction produces offspring that are genetically identical to the parent because the offspring are all clones of the original parent.
Explanation:
helllppp i have a test!!!!
A compound has a molar absorptivity of 40.9 cm ^ - 1 * M ^ - 1 at 293 nm. If a 1.00 cm cuvette is used, and the absorbance found to be 0.111, what is the concentration of the sample ?
Answer:
0.00271 M
Explanation:
To solve this problem we can use the formula:
A = ε * C * lWhere A is the absorbance, ε is the molar absorptivity, C is the molar concentration and l is the optical path length.
We input the data given by the problem:
0.111 = 40.9 cm⁻¹M⁻¹ * C * 1.00 cmAnd solve for C:
C = 0.00271 MThe study of chemicals is called chemistry.
The correct answer is 0.00271 M
To solve this problem the formula is used as follows:-
A = ε * C * l
The data is given as follows:-
A is the absorbance,ε is the molar absorptivity, C is the molar concentration l is the optical path length.
[tex]0.111 = 40.9 * C * 1.00[/tex]
After solving the equation the value of C is as follows:-
[tex]C = 0.00271 M[/tex]
Hence, the correct answer is 0.00271.
For more information, refer to the link:-
https://brainly.com/question/14698383
42 mole Al= how many atoms?
2.5 × 10²³ atoms Al
General Formulas and Concepts:Math
Pre-Algebra
Order of Operations: BPEMDAS
Brackets Parenthesis Exponents Multiplication Division Addition Subtraction Left to RightChemistry
Atomic Structure
Avogadro's Number - 6.022 × 10²³ atoms, molecules, formula units, etc.Stoichiometry
Using Dimensional AnalysisExplanation:Step 1: Define
42 mol Al
Step 2: Identify Conversions
Avogadro's Number
Step 3: Convert
Set up: [tex]\displaystyle 42 \ mol \ Al(\frac{6.022 \cdot 10^{23} \ atoms \ Al}{1 \ mol \ Al})[/tex]Multiply/Divide: [tex]\displaystyle 2.52924 \cdot 10^{25} \ atoms \ Al[/tex]Step 4: Check
Follow sig fig rules and round. We are given 2 sig figs.
2.52924 × 10²³ atoms Al ≈ 2.5 × 10²³ atoms Al
1) How many moles of water does 6.02 x 1023 molecules
represent?
Answer:
1.00 mol
Explanation:
Step 1: Given data
Molecules of water: 6.02 × 10²³ molecules
Step 2: Calculate the number of moles corresponding to 6.02 × 10²³ molecules of water
In order to convert molecules to moles, we need a conversion factor. In this case, we will use Avogadro's number: there are 6.02 × 10²³ molecules in 1 mole of molecules.
6.02 × 10²³ molecules × 1 mol/6.02 × 10²³ molecules = 1.00 mol (we keep 3 significant figures)
formula for trichlorine tetroxide
When 20g of hydrogen gas will react with 20g of chlorine gas, what is the mass of hydrogen chloride formed?
Answer:
40g
Explanation:
equation; H2 + Cl2 ---- 2HCl
mole ratio; 1 mole 1 mole 2 moles
before reaction;20g 20g 0g
after reaction; 20g 20g 40g
En la ecuación: Fe2O3 + CO = Fe + CO2.
El agente reductor es:
a)oxido ferrico
b)dióxido de carbono
c)monóxido de carbono
d)hierro
Answer:
English please
Explanation:
Help!!
Which set of Earth components is arranged in order from solid to liquid to gas?
hydrosphere, atmosphere, lithosphere
hydrosphere, lithosphere, atmosphere
lithosphere, atmosphere, hydrosphere
lithosphere, hydrosphere, atmosphere
Answer:
Lithosphere, Hydrosphere, atmosphere
The set of Earth components that is arranged in order from solid to liquid to gas is D. lithosphere, hydrosphere, atmosphere
Lithosphere refers to the solid, outer part of the Earth. It is also known as the Rocky part of the Earth. It consists of the top part of the upper mantle and the brittle crust.Hydrosphere simply refers to the water on the Earth, underground and those that are in the air. This can be seen in ocean, seas, rivers, etc.Atmosphere refers to the layers of gases that can be found on Earth.ut contains gases like nitrogen, oxygen, etc.Read related link on:
https://brainly.com/question/19541638
Four moles of CO2
a mass of how many grams
Answer: = 17.6
Explanation:
Molar mass of CO2 = 44 g mol-1
Mass of 1 mole of CO2 = 44 g
Mass of 0.4 mole = 44 x 0.4
= 17.6g
Answer:
the answer is 17.6 that's what I got
HELP PLS ILL GIVE BRAINLIEST AND 40 POINTS!!!
According to the information in the table, what comparison can Molly make about the densities of sugar and corn starch?
Density is mass divided by volume (D = M/V)
Select one:
A. Corn starch is more dense than sugar.
B. Sugar is more dense than corn starch.
C. Sugar is more dense than baking soda.
D. Both sugar and corn starch are more dense than salt.
Answer:
A.? I think it is A hope it helps
please fill this formula
A 18.5 gram sample of metal was added to a graduated cylinder that had
an initial volume of 45.50 mL. The water level raised to 54.10 mL. Using
this information, calculate the density of the metal. *
Answer:
[tex]d=2.15g/mL[/tex]
Explanation:
Hello there!
In this case, since the density of the metal is computed as shown below:
[tex]d=\frac{m}{V}[/tex]
We need to calculate the volume of the solid by subtracting the final volume and the initial volume of water:
[tex]V=54.10mL-45.50mL\\\\V=8.60mL[/tex]
Thus, we obtain:
[tex]d=\frac{18.5g}{8.60mL}\\\\d=2.15g/mL[/tex]
Best regards!
What causes radiation?
Answer:
It can come from unstable atoms that undergo radioactive decay, or it can be produced by machines. Radiation travels from its source in the form of energy waves or energized particles. There are different forms of radiation and they have different properties and effects
Please help me fast What is the Molarity of 100g of Vit. C (C6HBO6) with 2.5L of water?
Can someone help me out with the question
What happens to the total number of carbon atoms on Earth? Does the total get larger, does it get smaller, or does it stay the same?
Answer:
It stays the same.
Explanation:
What happens as elevation increases?
Answer:
As altitude increases, the amount of gas molecules in the air decreases the air becomes less dense than air nearer to sea level.
Explanation:
Which has a greater volume, 100mL of alcohol or 100mL of water? Prove your answer.
Answer water
Explanation:
a. How many moles of hydrogen would be needed to produce 12 moles of ammonia
8 moles and I hope that this helps
Two liquids X and Y boil at 110°C and 140°C respectively. Which of them has higher
vapour pressure at 50°C? Why?
Answer:
X
Explanation:
Liquid X has higher vapor pressure because the greater the temp the weaker and the lower the temp the stronger/faster... :)
6. What is a solution an example of?
A) element
B) heterogeneous mixture
(C)compound
D) homogeneous mixture
Answer:
solution is a homogeneous mixture of two or more component
Answer:
B) heterogeneous mixture
Explanation:
What is Magnesium phosphide cation and Anion
Answer:
Magnesium Phosphide has a formula of Mg3P2 . Magnesium is a metal cation with a charge of Mg+2. Phosphorus is a nonmetal anion with a charge of P−3. In order to bond ionically the charges must be equal and opposite
Explanation:
Which process occurs during transpiration?
A.
During transpiration, water vapor precipitates from plants.
B.
During transpiration, water vapor evaporates from plants.
C.
During transpiration, water vapor condensates from plants.
D.
During transpiration, water vapor collects from plants.
E.
During transpiration, water vapor is absorbed by plants.
Answer:
It should be B
Explanation:
because I just searched it up if I'm wrong I'm wrong
Answer:transpiration just took the test
Explanation:
100%
Hot, molten rock deep below Earth’s surface is called lava mantle rock parent rock magma
Answer:
I think it is Magma
Pls help me I will give you 10 points