Answer:
[tex]molar \: mass \: of \: FeSO _{4}.7H _{2}0 = (56 + 32 + (16 \times 4) + (7 \times 18)) \\ = 278 \: g \\ \\ (278 \times 1000) \: mg \: of \: FeSO _{4}.7H _{2}0 \: contains \: (56 \times 1000) \: mg \: of \: Fe \\ 250 \: mg \: of \: FeSO _{4}.7H _{2}0 \: contain \: ( \frac{250 \times 56 \times 1000}{278 \times 1000} ) \\ = 50.35 \: mg \: of \: Fe[/tex]
The mass of Fe delivered by 250 mg Iron sulfate heptahydrate has been 50.35 mg.
The molar mass of the compound has been the sum of the mass of each element present in the compound. The given compound is iron sulfate heptahydrate. The compound has molar mass 278 grams.
1 mole of compound has been consisting of 1mole of iron.
278 grams Iron sulfate = 56 grams Fe
278,000 mg Iron sulfate = 56,000 mg Fe.
The mass of iron in 250 mg compound can be given as:
278,000 mg Iron sulfate = 56,000 mg Fe
[tex]\rm 250\;mg \;Iron\;sulfate\;=\;\dfrac{56,000}{278,000}\;\times\;250[/tex]
250 mg Iron sulfate tablet = 50.35 mg Fe.
The mass of Fe delivered by 250 mg Iron sulfate heptahydrate has been 50.35 mg.
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A science teacher gave a student a sample of a clear liquid labeled "unknown
substance." Which property would best help the student determine the
sample's identity?
A. The sample's boiling point
B. The sample's mass
C. The sample's volume
D. The sample's weight
Answer:
A. The sample's boiling point
Explanation:
Because by knowing boiling point we easily find a substance for example if given clear liquid boiling point is 100 c° we immediately know this is water.
Moreover boiling point is a fixed quantity for a substance.
What are some properties we can use to describe matter
Answer:
melting point, hardness, odor, temperature
A gas occupies 1.00cm^3 at STP. What volume does it occupy at 710.0 mm Hg and 55.0°C
Answer:
Final volume is 1.29cm³
Explanation:
Using combined gas law:
P₁V₁/T₁ = P₂V₂/T₂
Where P is pressure, V volume and T absolute temperature of 1, initial state and 2, final state of a gas.
We can solve the volume of the gas:
P₁ = 1atm at STP
V₁ = 1cm³
T₁ = 273.15K at STP
P₂ = 710mmHg * (1atm / 760mmHg) = 0.9342atm
V₂ = ?
T₂ = 55.0°C + 273.15K = 328.15K
Replacing:
1atm*1cm³/273.15K = 0.9342atm*V₂/328.15K
1.29cm³ = V₂
Final volume is 1.29cm³
Which term is defined as the region in an atom where an electron is most likely to be
located?
1.
nucleus
2.
orbital
3.
quanta
4.
spectra
Answer:
"2.Orbital." I think
Explanation:
Risk*
HURRY ANSWER NOW AND I GIVE BRAINLY!!! HURYYY
1. A student left a sealed jar of water outside her home. Water can be a solid, liquid, or gas. When she put it outside, the water was a solid. Twelve hours later, the water had changed phase and was a liquid. What happened to the water molecules?
Answer:
A. "before the student left, the molecules we're moving in place. After, the molecules we're moving around each other.
Explanation:
Hope this helps. Please mark as brainliest if it did. :)
what does newton’s first law of motion explain
Answer:
Newton's first law states that, if a body is at rest or moving at a constant speed in a straight line, it will remain at rest or keep moving in a straight line at constant speed unless it is acted upon by a force.
PLEASE HELPPP!!!!!! ASAP!!!!
Which of the following best describes cations? Question 19 options: A) They're negatively charged because they lost an electron. B) They're positively charged because they gained an electron. C) They're positively charged because the number of electrons remained the same. D) They're positively charged because they lost an electron.
Answer:D
Explanation:trust me bro
Answer:
D
Explanation: I took the test
¿Cuál es el % en masa de una disolución de 1800 gr. De agua de jamaica si se le agregaron 120 gr. De azúcar?
A common organic compound is analyzed and found to contain 40.00% carbon, 6.71%, and 53.29%. Determine the empirical formula
A)
CH2O
B)
C₂H₂O₃
C)
C6HO8
D)
C6H12O6
Answer: CH2O I just did the question
Explanation:
Empirical formula is the simplest whole number ration of elements in a compound. Molecular formula is n times where n is integers 1,2,... Therefore, the empirical formula that is 40.00% carbon, 6.71% hydrogen, and 53.29% oxygen is CH[tex]_2[/tex]O.
What is empirical formula?Empirical formula gives the proportion of the element that is present in a compound. It does not give information about the actual number or the arrangements of the atoms.
Number of gram atoms in compound = percentage of that element ÷Molar mass of that element
Molar mass of carbon=12
Molar mass of hydrogen =1
molar mass of oxygen=16
C= 40.00%÷24=1.66
H= 6.71%÷1=6.71
O=53.29%÷/16=3.33
The atomic ratio is1.66:6.71:3.33. Dividing by smallest whole number, the Whole number ratio is C:H:O is 1:2:1. Empirical formula corresponding to this whole number is CH[tex]_2[/tex]O.
Therefore, the empirical formula that is 40.00% carbon, 6.71% hydrogen, and 53.29% oxygen is CH[tex]_2[/tex]O.
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What is the conversion for 2.0 m x 5.0 m =
What is the ability for a substance to flow
The ability for a substance to flow is fluidity.
Which substances show flowing?Only liquid and gaseous substances have the ability to flow from one point to other as they have weak intermolecular force in it.
Fluidity is the quantity which gives idea about the ability of that substance to flow. At normal conditions at room temperature, any substance has the tendency to distort its shape in order to flow or take the shape of the container it is enclosed in.
Hence the ability for a substance to flow is fluidity.
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One piece of matter is divided into two pieces of matter. Identify the mass of the two new pieces combined.
A. It's the same as the original piece
B. It is greater than the original piece
C. It is less than the original piece
D. It cannot be measured
PLEASE HELP!! THANK YOU
Answer:
A. It's the same as the original piece
Explanation:
The piece of matter is the same as that of the original piece.
When the mass of the two new pieces are combined, it the same as the single and whole one.
Mass is the amount of matter contained within a substance.
When the whole is broken into two and there is no mass loss, the mass is retained when they are brought together again. In most cases mass is always conserved even physical changes.HELP HELP HELP HELP HELP HELP HELP
What is the conversion for 2.0 m + 3.33 m + 4 m =
Answer:
933/100
9.33m
....... . . . . .. .. .
Calculate the number of atoms in 3.21 mole of Mg?
Answer:
1.93 × 10²⁴ atomsExplanation:
The number of atoms in a substance can be found by using the formula
N = n × Lwhere n is the number of moles
N is the number of entities
L is the Avogadro's constant which is
6.02 × 10²³ entities
From the question we have
N = 3.21 × 6.02 × 10²³
We have the final answer as
1.93 × 10²⁴ atomsHope this helps you
When sodium atoms (Na) and chlorine atoms (CT) join to make sodium chloride, or table salt, they form an ionic bond, Using this information, which pair of elements is most likely to form an ionic bond? O potassium (K) and fluorine (F) aluminum (AI) and aluminum (AD O sulfur (S) and oxygen (O) O calcium (Ca) and neon (Ne)
Answer:
D I'm pretty sure.
Explanation:
I'm taking the quiz right now and D makes the most sense.
Answer:
d
Explanation:
explain how transferring energy into or out of a substance changes the molecules kinetic energy and changes their freedom of movement
Answer:
Transferring energy into or out of a substance changes its temperature, which changes the molecules' freedom of movement. Claim 2: Transferring energy into or out of a substance changes the molecules' kinetic energy, which changes their freedom of movement.
simple device that makes climbing easier
Answer:
inclined plane ; is that device.
What are two uses of carbon?
[tex] \huge\sf{ \pink{{\purple{\fbox{ \blue{\fbox{\pink{ANSWER}}}}}}}} [/tex]
Carbon fibre is finding many uses as a very strong, yet lightweight, material. It is currently used in tennis rackets, skis, fishing rods, rockets and aeroplanes.Impure carbon in the form of charcoal (from wood) and coke (from coal) is used in metal smelting. It is particularly important in the iron and steel industries.[tex]{\huge{\underline{\small{\mathbb{\blue{HOPE\:HELPS\:UH :)}}}}}}[/tex]
Use dimensional analysis to convert 74.9 dry quarts to liquid quarts.
Answer:
87.2 liquid quarts (US)
How many molecules are in 50.00 grams of sucrose, C12H22O11
Answer: Well take this for an example and see if it helps with 50 grams of sucrose
Explanation:
Explanation:
And we have to calculate the number of moles of sucrose present in a
lb
mass of sucrose:
Moles of sucrose
=
454
⋅
g
342.30
⋅
g
⋅
m
o
l
−
1
=
1.33
⋅
m
o
l
.
Now it is a fact that in a
mole
of stuff there are
6.022
×
10
23
individual items of stuff.........
So
1.33
⋅
m
o
l
×
6.022
×
10
23
⋅
m
o
l
−
1
≅
8
×
10
23
individual
sucrose molecules
Look at the picture. If one of the lightbulbs breaks or is removed, what will happen to the other lightbulb?
2 bulbs and a battery in a single loop of wire.
Question 2 options:
It will stay on
It will go off
It will change colors
It will burn out
HERES ANOTHER FOR YOU GUYS! :)
Answer:
It will go off.
Explanation:
Since the two bulbs are connected in series with the battery, when one bulb breaks breaks the circuit hence flow of current is stopped from moving to the other bulb
Compare and contrast The two methods of making alcohol
Answer:
The table compares making ethanol by hydration of ethene (ethene and steam) to making ethanol by fermentation (sugar from plant material).
state modern periodic law ?arrange the element of halogen family in the increasing order of their number of Shell ?what type of Bond formation exists between the element of group 1 and 17 and why?
Answer:
Modern periodic law states that the properties of elements are dependent on their atomic numbers and elements show similar properties at regular interval of increasing atomic number.
Question 2 :FluorineChlorineBromineIodineAstatine Question 3 :3. Ionic Bond .
Reason : The elements from Group I are metals ( they lose electrons )
The elements from Group 17 are non-metals ( they Gain electrons
Given the following two quantities: 0.50 mol of CH4 and 1.0 mol of HCl,
a. Which has more atoms?
b. Which has more molecules?
c. Which has the greater mass?
d. Which has the greater volume at the same temperature and pressure (both are gases)?
Answer:
(a) HCl
(b) HCl
(c) HCl
(d) HCl
Explanation:
Given: 0.50 mol of CH₄ and 1.0 mol of HCl
Using stoichiometry we can calculate the answers to parts a, b, c, and d.
Part (a)# of moles × Avogadro's number = # of atoms or molecules
Avogadro's number: 6.02 * 10²³
[tex]\displaystyle 0.50\ \text{mol CH}_4 \cdot \frac{6.02\cdot 10^2^3 \ \text{atoms CH}_4}{1 \ \text{mol CH}_4} = 3.01 \cdot 10^2^3 \ \text{atoms CH}_4[/tex] [tex]\displaystyle 1.0\ \text{mol HCl} \cdot \frac{6.02\cdot 10^2^3 \ \text{atoms HCl}}{1 \ \text{mol HCl}} = 6.02 \cdot 10^2^3 \ \text{atoms HCl}[/tex]HCl has more atoms than CH₄.
Part (b)This is calculated the same way as Part (a); HCl has more molecules than CH₄.
Part (c)Molar mass of CH₄ = 16.04 g/mol
Molar mass of HCl = 36.458 g/mol
[tex]\displaystyle 0.50\ \text{mol CH}_4 \cdot \frac{16.04 \ \text{g CH}_4}{1 \ \text{mol CH}_4} = 8.02 \ \text{g CH}_4[/tex] [tex]\displaystyle 1.0\ \text{mol HCl} \cdot \frac{36.458 \ \text{g HCl}}{1 \ \text{mol HCl}} = 36.458 \ \text{g HCl}[/tex]HCl has a greater mass than CH₄.
Part (d)Assuming STP:
Molar volume of any gas at STP is 22.4 L/mol.
[tex]\displaystyle 0.50\ \text{mol CH}_4 \cdot \frac{22.4 \ \text{L CH}_4}{1 \ \text{mol CH}_4} = 11.2 \ \text{L CH}_4[/tex] [tex]\displaystyle 1.0\ \text{mol HCl} \cdot \frac{22.4 \ \text{L HCl}}{1 \ \text{mol HCl}} = 22.4 \ \text{L HCl}[/tex]HCl has a greater volume than CH₄.
4. Pb +FeSO, - PbSO, +Fe
Reaction Type:
Answer:Fe
Explanation:
What's wrong with the statement "a mug of hot chocolate contains more heat than a glass of cold water."
Answer:
Heat is not something that can be contained since it is not a tangible thing. Heat is a process
Explanation:
The wrong thing in this statement "a mug of hot chocolate contains more heat than a glass of cold water."is: Heat is a process. Heat is not something that can be contained since it is not a tangible thing.
What is Heat ?Heat can be defined as a state or quality of being hot or in a high temperature.
Heat can also be said to be a transfer of kinetic energy from one environment to another, from one medium to another, or from one object to another.
In conclusion, Heat is a process. Heat is not something that can be contained since it is not a tangible thing.
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Balancing Equations
Fe + O2 --> Fe2O3
Answer:
4Fe + 3O2 --> 2Fe2O3
Explanation:
The Princess cruise ship left San Francisco and traveled south for 8 hours at a speed of 30mph. What is the velocity of the ship? Round your answer to the hundreths place
Answer:
v = 300 mph due South.
Explanation:
Given that,
The Princess cruise ship left San Francisco and traveled south for 8 hours at a speed of 30mph.
We need to find the velocity of the ship. It can be calculated by total distance divided by total time taken.
Velocity is a vector quantity i.e. it has both magnitude and direction. On the other hand, the speed has only magnitude (scalar quantity).
In this case it is mentioned that the cruise is travelling south with a speed of 300 mph.
Hence, the velocity is 300 mph in South direction.
what is the y and x axis?
Answer:
x is horizontal
y is vertical
Explanation: