Answer:
La masa atómica del hierro es 55.847 gramos por mol.
Explanation:
Las masas molares de [tex]Fe_{54}[/tex], [tex]Fe_{56}[/tex], [tex]Fe_{57}[/tex] y [tex]Fe_{58}[/tex] son 53.940 gramos por mol, 55.935 gramos por mol, 56.935 gramos por mol y 57.933 gramos por mol, respectivamente. La masa atómica del hierro se determina mediante el siguiente promedio ponderado:
[tex]M_{Fe} = \frac{5.82}{100}\times \left(53.940\,\frac{g}{mol} \right)+\frac{91.66}{100}\times (55.935\,\frac{g}{mol})+\frac{2.19}{100}\times \left(56.935\,\frac{g}{mol} \right)+\frac{0.33}{100}\times \left(57.933\,\frac{g}{mol} \right)[/tex]
[tex]M_{Fe} = 55.847\,\frac{g}{mol}[/tex]
La masa atómica del hierro es 55.847 gramos por mol.
A series stack of alkaline cells produces 4,524 kW of power of each coll contributes 14,5 w, how many cells are in the stock? (Round to the nearest whole
number)
ОА З
B. 66
OC. 312
OD 3,205
PLEASE HELP!!!!!!!!!
Answer:
C. 312
Explanation:
Answer:
C-312
EDGE 2021
Explanation:
2) A container has an unknown quantity of gas at a pressure of 61.6 kPa, a volume of 3.9 liters, and a temperature
of 90 °C, how many moles of gas do I have?
3) A container has 23 moles of gas in a container with a volume of 500 liters and at a temperature of 298 K, what
is the pressure inside the container?
4) A barrel has 19 moles of gas at a pressure of 20.5 atm and at a temperature of 25 °C, what is the volume of the
container that the gas is in?
Answer:
3
Explanation:
What would you se if you looked at a grain of salt
Answer:
I'd imagine it would look like a snowflake pretty much see through and microscopic
Write 134 020 000 in scientific notation.
When convex mirrors are used for security purposes, the images they form
are real images.
A. True
B. False
Answer:false
Explanation:
Giving brainliest pls answer I don't need explanation just answer!!
Mass of NaCl : 5.85 g
Further explanationGiven
5.3 g Sodium carbonate (Na₂CO₃)
Required
Mass of NaCl
Solution
Reaction
Na₂CO₃ + 2HCl ⇒ 2NaCl + H₂O + CO₂
mol of Na₂CO₃ (MW=106 g/mol) :
= mass : MW
= 5.3 g : 106 g/mol
= 0.05
From the equation, mol ratio Na₂CO₃ : NaCl = 1 : 2, so mol NaCl :
= 2/1 x mol Na₂CO₃
= 2/1 x 0.05
= 0.1
Mass of NaCl (MW=58.5 g/mol) :
= mol x MW
= 0.1 x 58.5
= 5.85 g
How would you create a negative charge?
This is kinda confusing for me
Answer:
Um did you post something I don't see nothing
Explanation:
Why do the exceptional configurations taught in this class (only 1 electron moves from an s orbital to a d orbital) happen? (choose all that apply)
Because sublevel overlap results in the d sub level of one energy level being very close to the s sublevel of the next energy level
Because full sub levels are more stable than partially filled sub levels
Because half filled sub levels are more stable than partially filled sub levels
Because electrons want to be in the largest sublevel they can find.
Answer:
Because half filled sub levels are more stable than partially filled sub levels
Explanation:
The reason for the exceptional configuration found in some atomic orbitals is due to the special stability of half-filled sub-levels over partially filled ones.
One of the characteristic thing about filling some atomic orbitals we have to bear in mind that there is a stability conferred on an atom by being partially filled.
The energy needed to remove an electron from a half-filled configuration or inert gas configuration is very great.
This is why when there is a choice to have half-filled orbitals, it is desirous to go for this configuration.
Helpppp meee plzzzzzzz
Calculate the number of formula units in 1.87 mol of NH4Cl
a. 1.13 x 1024 NH4Cl
b. 6.75 x 1024 NH4Cl
c. 1.12 x 1024 NH4Cl
Answer:
1.13 x 10²⁴formula units
Explanation:
Given parameters:
Number of moles of NH₄Cl = 1.87mol
Unknown:
Number of formula units = ?
Solution:
From mole concept;
1 mole of a substance contains 6.02 x 10²³ formula units
Now;
1.87 moles of NH₄Cl 1.87 x 6.02 x 10²³ = 1.13 x 10²⁴formula units
The atomic mass of an atom is the sum of:
A protons and electrons
B protons and neutrons
C electrons and neutrons
Answer:
i think b(proton and neutrons)
A high speed train travels 176 miles in 7 hours. What is the speed of the train
in mph? Enter your answer a just a number without units.
Answer:
25 mph
Explanation:
So we have to find the unit rate, or you could use the DTS triangle, but both say you have to divide, so our equation is:
176 ÷ 7 = 25.14
But I'm going to round that
So the train is traveling at 25 mph
hope this helps:/
What is created by the gravitational pull of the moon?
HURRY PLEASE ! I HAVE LIMIT TIME !
Answer:
Tides . hope this helps
Explanation:
the tidal force causes earth and its water to bulge out on the side closest to the moon
Does solubility have any unit
Answer:
Solubility may be stated in various units of concentration such as molarity, molality, mole fraction, mole ratio, mass (solute) per volume (solvent) and other units. The extent of solubility ranges widely, from infinitely soluble (without limit) ( miscible) such as ethanol in water, to poorly soluble, such as silver chloride in water.
Explanation:
If distance, d, is proportional to time, t, and at time t =2.00 seconds, the distance is 6.20 m, find the distance when t = 3.50 s.
In the experiment, you will heat up 50 grams of cold sand and 50 grams of cold water by adding hot water. Will the kind of material—sand or water—affect the temperature change? State your hypothesis.
Answer:
If sand is much denser than water, then the water will warm up faster than the sand. So yes, the kind of material—sand or water—affects the temperature change.
Explanation:
I put this as my answer :)
Good luck!! <3
Yes, the kind of material, water or sand will affect the temperature change in the experiment.
Heat produces temperature change in a body. This is one of the effects of heat. However, the extent of temperature change due to heat depends on the nature of the material. A material that has a high specific heat capacity does not undergo a large change in temperature when heat is added.
Yes, the kind of material, water or sand will affect the temperature change in the experiment. The temperature change of sand will be much higher than the temperature change in water when the same quantity of heat is added because water has a higher specific heat capacity than sand.
Learn more: https://brainly.com/question/8592296?
PLEASE HELP!!!
How many grams are in 10.11 moles of sucrose?
3. A man rode on his motorcycle for 162 miles. His average speed was 45 miles per hour. How long did his trip take?
5 points
What is the name of the atom pictured here? Use a periodic table if
needed. *
Answer:
There is nothing attached to this question so I unfortunately cannot help you
Explanation:
Can someone plz help me
Answer:
Number 1,2,and 6.
Explanation:
The base of living things and general reactions are number 1,2,6!
Hope this helps :)
Students mixed 20 mL of white glue and 20 mL of water in a cup. They added three drops of food coloring to the mixture. Then, 15 mL of borax solution was stirred into the mixture. Once mixed, the students observed they could take the substance out of the cup and roll it around in their hands. They concluded that –
Hi im here to help!
Answer: a chemical reaction occurred because a new substance was formed with new properties!
Explanation: when u mix glue water and borax it forms into a new substance which is a chemical reaction
The students concluded after mixing the water and glue that;
A chemical change took place because a new substance was formed.
We are told that the students mixed 20 mL of white glue and 20 mL of water in a cup. These two reactants are different and we are told that 15 mL of borax solution was stirred into the mixture.
Now, the three reactants are different and they combined to form a substance that they could roll around their hands.
For them to be able to roll the product around their hands means that a new substance was formed.
In conclusion, we can say a chemical change took place as 3 different substances combined to form a new product which is not reversible like physical change.
Read more about chemical change at; https://brainly.com/question/11987405
1.) How many significant figures are in the following number 0.001040 nm
A.) 3
B.) 2
C.) 5
D.) 6
(If you can pls explain how you got the answer, ty!)
Each time the boy breathes, he exhales 0.02231 moles of gas at STP. How many liters of gas does he exhale?
Answer:
The number of liters) the boy exhales is 0.499744 liters
Explanation:
The given parameters of how the boy breathes;
The number of moles of gas the boy exhales, n = 0.02231 moles
The condition in which the boy exhales the gas = STP = Standard Temperature and Pressure
The molar volume of a gas at STP, [tex]V_m[/tex] = 22.4 L per mole
Therefore, the volume of gas the boy exhales, 'V', is give as follows;
V = n × [tex]V_m[/tex]
By substituting the known values, we have;
V = 0.02231 moles × 22.4 L/mole = 0.499744 L
The volume of gas (the number of liters) the boy exhales, V = 0.499744 L.
6. A student is writing a formula for Magnesium Nitrite. He knows nitrite is a polyatomic ion with a charge of -1.
Magnesium is an ion with a charge of +2. He concludes that he will need 2 nitrite ions to balance the charge
across the compound. Thus he writes the final formula as MgN,O2. Explain what he has done wrong.
Answer:
See explanation
Explanation:
First of all, the student has not represented the formula of the nitrite ion correctly. The formula of the nitrite ion is represented as NO2^- whereas the student wrote N,O2.
Then, the charge on magnesium ion has been correctly designated as +2 while the charge on the nitrite ion is correctly designated as -1. Now, the ions can exchange valencies (without signs and we now write them as subscripts) to yield Mg(NO2)2.
I need help ASAP!! I tried every answer but it’s saying there all wrong !
Determine the number of moles in each of the following:
45.2 g Ag
67.1 g Cr
53.9 g Mn
Determine the number of grams in each of the following:
1.56 mol K
2.5 mol Ba
110 mol He
Determine the mass in grams of each of the following:
5.04 x 1024 atoms N
2.01 x 1024 atoms Ca
8.32 x 1021 atoms Sn
Determine the number of particles contained in each of the following:
50.3 g Cu
145g Si
0.67 g Cl
Answer:
1.) 0.4190298901807947
2.) 1.290481401489745
3.) 0.981105098945202
Determining grams in each of the following
1.) 60.993348000000005
2.) 343.3175
3.) 440.28622000000007
Explanation:
I hope a few of these answers help! :)
An element gains 3 electrons to become stable. What is the new ion's charge?
+3
-3
+5
-5
What makes the periodic table arrangement so unique and useful?
Convert the following Grams: 0.200 moles of H2S
Answer:
6.82 g H₂S
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 TableStoichiometry
Using Dimensional AnalysisExplanation:
Step 1: Define
0.200 mol H₂S
Step 2: Identify Conversions
Molar Mass of H - 1.01 g/mol
Molar Mass of S - 32.07 g/mol
Molar Mass of H₂S - 2(1.01) + 32.07 = 34.09 g/mol
Step 3: Convert
Set up: [tex]\displaystyle 0.200 \ mol \ H_2S(\frac{34.09 \ g \ H_2S}{1 \ mol \ H_2S})[/tex]Multiply: [tex]\displaystyle 6.818 \ g \ H_2S[/tex]Step 4: Check
Follow sig fig rules and round. We are given 3 sig figs.
6.818 g H₂S ≈ 6.82 g H₂S
