Answers
Answer:
the answer is a please check
Related Questions
Iron is extracted from iron oxide in the Blast Furnace: Fe 2 O 3 + 3 CO → 2 Fe + 3 CO 2
a) Calculate the maximum theoretical mass of iron that can be made from 100g
of iron oxide.
b) In the reaction, only 65 g of iron was made. Calculate the percentage yield.
Answers
a. mass of iron = 69.92 g
b. percent yield = 93%
Further eplanationPercent yield is the compare of the amount of product obtained from a reaction with the amount you calculated
General formula:
Percent yield = (Actual yield / theoretical yield )x 100%
An actual yield is the amount of product actually produced by the reaction. A theoretical yield is the amount of product that you calculate from the reaction equation according to the product and reactant coefficients
a.
Reaction
Fe₂O₃+3CO⇒2Fe+3CO₂
MW Fe₂O₃ : 159.69 g/mol
mol Fe₂O₃
[tex]\tt \dfrac{100}{159,69}=0.626[/tex]
mol Fe₂O₃ : mol Fe = 1 : 2
mol Fe :
[tex]\tt \dfrac{2}{1}\times 0.626=1.252[/tex]
mass of Fe(Ar=55.845 g/mol) :
[tex]\tt 1.252\times 55.845=69.92~g[/tex]
b.
actual yield = 65 g
theoretical yield = 69.92 g
percent yield :
[tex]\tt =\dfrac{65}{69.92}=0.93=93\%[/tex]
What could happen if the chemists do not follow the exact formula for medications? (Give examples)
Answers
Answer:
qwe
Explanation:
wqe
2. Which state of matter will take both the volume
and shape of the container that holds it?
A. gas
B. ice
C.liquid
D. Solid
Answers
Answer:
The answer would be C) a liquid.
Explanation:
If you were to pour a glass of water into a rectangular container, the water would fill up the container and be in the same shape as the container. That is becuase water flows and it doesn't harden up or take its own shape until it's frozen. The molecules are not tightly secure to each other so they are able to move freely.
as water cruise to a temperature of zero degrees Celsius and form ice water molecules tend to
A. move faster apart
B. vibrate rapidly
C. flow more randomly
D. gradually expand
Answers
Answer:
B. vibrate rapidly
Explanation:
Mark above answer as BRILLIANT
An experiment was conducted to determine the density of a rock sample. The table shows a partial record of the experiment.
Experimental Record
Mass of Rock
86.59
Volume of Water in the Graduated Cylinder 142.5 mL
?
What information should be recorded in the last row of the table?
Answers
Answer: the density of the rock
55.91g/ml
Explanation:
The density of the rock after it had being placed in the cylinder of water so the calculation should look like this:
Volume of water substract the mass of the rock:
And that is 142.5 ml - 86.59g =
Answer 55.91 g/ml
So the density of the rock is 55.91g/ml
how does sustainable development support in a long term vision
Answers
Explanation:
meet .google .com/sxr-wgwg-vnc
Which statement describes the blood type of a person with the alleles IAi?
It is type AB because I and i are codominant.
It is type AB because A and i are codominant.
It is type A because i is dominant and A is recessive.
It is type A because A is dominant and i is recessive.
Answers
Answer:
I answer this question I think I said the second one
Answer:
yep its the second one
Explanation:
a flask that weighs 450g is filled with 145ml of benzene. the weight of the flask and benzene is found to be 754g. from this information, calculate the density of the benzene.
Answers
Which best describes what is occurring when a door is almost closed and rays of light fan out from the small opening? absorption interference refraction diffraction
Answers
Answer:
The correct answer is Option D (diffraction).
Explanation:
Diffraction has been known as a mechanism through which light rays divide across clusters of darkness and light rather than into the colors of the rainbow. That is the twisting of such an obstacle across the sun. In this case, the challenge has been the door from which the illumination moves and bends.Other alternatives are not relevant to the specified case. So, the alternative above would be appropriate.
Answer: D
Diffraction
Explanation:
E D G E 2 0 2 0
How many H2 and O2 molecules do you need to make exactly 4 water molecules with no leftovers?
Answers
This is because water is H2O which is 2 Hydrogen and 1 Oxygen so if you want to make 4 water molecules, you’ll need 8 hydrogen and 4 oxygen.
Given H2 you need 4 because 4•2 is 8 and for O2 you need 2 because 2•2 is 4.
I hope this makes sense.
The number of H2 and O2 molecules needed should be 4 and 2.
Calculation of the number of H2 and O2 molecules:We know that the water i.e. H2O that comprise of 2 hydrogen and 1 oxygen so in the case when we have to make 4 water molecules so it needed 8 hydrogen and 4 oxygen
So for H2 it needs 4 and for O2 it needs 2
Therefore, The number of H2 and O2 molecules needed should be 4 and 2.
Learn more about oxygen here: https://brainly.com/question/24136784
is this anwser correct
Answers
Answer:
Yes. It is definitely correct
All objects contain matter which statement is true? A. Matter is usually measured in milliliters B. The shape of an object is what gives it matter. C. Matter is a measurement of how big an object is. D. As matter is added to an object, its weight increases
Answers
Answer:
D. As matter is added to an object, its weight increases
Explanation:
Balance the following chemical equation
Answers
I need help please???
Answers
Answer:
the answer is the 2nd option
Explanation:
distance is divided by rime
On a hot day, the wood gate on the side of my house gets stuck and I have to push very hard to get it open and shut. Describe *on the molecular level* why this is happening. Use these terms in your answer: kinetic energy, molecules
Answers
Answer:
Well rust just because the rain and wind sun whatever its meatal it stayed outside too long!
Explanation:
I really dont kno but i hope im right
WILL GIVE BRAINLYEST and 20 points!!!!!!!
explain that atoms of elements combine to make compounds
explain why there are many, but limited, combinations of elements to make compounds
demonstrate with atomic models how atoms can combine in many ways
Answers
Answer:
Explanation:
Any substance that contains only one kind of an atom is known as an element. Because atoms cannot be created or destroyed in a chemical reaction, elements such as phosphorus (P4) or sulfur (S8) cannot be broken down into simpler substances by these reactions.
Example: Water decomposes into a mixture of hydrogen and oxygen when an electric current is passed through the liquid. Hydrogen and oxygen, on the other hand, cannot be decomposed into simpler substances. They are therefore the elementary, or simplest, chemical substances - elements.
Each element is represented by a unique symbol. The notation for each element can be found on the periodic table of elements.
The elements can be divided into three categories that have characteristic properties: metals, nonmetals, and semimetals. Most elements are metals, which are found on the left and toward the bottom of the periodic table. A handful of nonmetals are clustered in the upper right corner of the periodic table. The semimetals can be found along the dividing line between the metals and the nonmetals.
Answer:
give him brainlyest my gye
Explanation:
sulfur (S) = 32, and of oxygen (O) = 16.
8. The relative formula mass of a sulfate, ZSO
is 159.5. The relative atomic mass (A) of
What is the relative atomic mass
of element Z?
A
63.5
B 32.5
C 15.5
Answers
Answer:
It should be 115.5 amu but you didnt type that as an answer choice so...
Explanation:
Bruh all you had to do was add oxygen and sulfur and subtract from the total to get your answer :D.
What process is required for minerals to crystallize from magma
Answers
Answer:
Chemical differentiation
Explanation:
The process by which minerals crystallize out of magma is termed chemical differentiation. Some times, it is referred to as magmatic differentiation.
Minerals have different properties and at certain environment, it comfortable for the settle out of magma. Some minerals can crystallize out at very high temperature. Some will form at medium temperature whereas, some are low temperature minerals. Based on the properties of the minerals in a melt, a minerals will differentiate at various temperature and pressure regimes.is the valency of carbon 2 or 4
Answers
Answer:
4
explanation:Carbon has four valence electrons and here a valence of carbon is four.
Answer:
4
Explanation:
needs four electrons to complete its orbit
Lithium is not nearly as abundant as sodium. If sodium ion batteries that function as lithium ion ones were developed, do you think sodium cobalt oxide would still work as the electrode material?
Answers
Answer:
No, sodium cobalt oxide would not work as the electrode material
Explanation:
Sodium is a much larger cation than lithium. Remember that ion size is a very important consideration when developing a battery. The ions to be substituted must be nearly of the same size if one ion is to replace the other in a crystal.
Since sodium ions are larger than lithium ions, sodium cobalt oxide would not work as the electrode material in Lithium ion batteries.
why water can be consider as an acid as well as base .explain briefly
Answers
Complete and balance each of the following equations for gas evolution reactions HCl(aq)+ZnS(s)>
Answers
2HCl(aq) + ZnS(s) ⇒ ZnCl₂(aq) + H₂S(g)
Further explanationEqualization of chemical reactions can be done using variables. Steps in equalizing the reaction equation:
1. gives a coefficient on substances involved in the equation of reaction such as a, b, or c, etc. 2. make an equation based on the similarity of the number of atoms where the number of atoms = coefficient × index (subscript) between reactant and product 3. Select the coefficient of the substance with the most complex chemical formula equal to 1Reaction
HCl(aq) + ZnS(s) ⇒ ZnCl₂(aq) + H₂S(g)
1. give equation
aHCl(aq) + bZnS(s) ⇒ ZnCl₂(aq) + cH₂S(g)
2. make an equation
H, left=a, right=2c⇒a=2c(eq 1)
Cl, left=a, right=2⇒a=2⇒c=1(from eq 1)
Zn, left=b, right=1⇒b=1
So the equation :
2HCl(aq) + ZnS(s) ⇒ ZnCl₂(aq) + H₂S(g)
If I have 7 electrons, 7 protons, and 7 neutrons what is my mass?
Answers
Answer:
14. The protons and neutrons count, but the electrons do not.
Explanation:
im in the middle of a chem test and i literally have no clue what is happening
Answers
Answer:
No question so I'm just taking the points
Indicate the answer choice that best completes the statement or answers the question.
The crust and upper mantle make up Earth's
O a. lithosphere Ob. asthenosphere
O d. continents
Oc. core
Question 2
Question 3
Question 4
Question 5
Question 6
Question 7
Question 8
Question 9
Question 10
Question 11
Question 12
Question 13
Question 14
Question 15
Question 16
Question 17
Question 18
Question 19
Question 20
LO
Answers
Answer: lithosphere
Explanation:
continents are a part of lithosphere.
core is a structure of earth
The radioactivity of U-235 is of low intensity. Why then were the people of Hiroshima exposed to high intensity radiation in the days and months after the atomic bomb was dropped?
Answers
Answer:
Explanation:
What occurred then is as a result of nuclear fission. This occurs as the Uranium-235 split into two smaller nuclei while releasing high energy neutrons. These neutrons bombard existing U-235 in the atmosphere and this reaction continue in a spontaneous manner until a chain reaction is formed of U-235, whose fall out fills the environment. This process was what led to people been exposed to high intensity radiation in the days and months after the atomic bomb was dropped.
Scientists Hydia, Christian, and Trynatie took 100 frogs. They kept 50 of the frogs at 35 degrees C. They kept 50 of the frogs at 25 degrees C. Then they measured how fast each frog's heart beat. What was changed or different BEFORE the experiment began?
Answers
Answer: Temperature was kept as an independent variable to observe the changes in the heart beat.
Explanation:
Independent variable can be defined as the variable which can be changed to induce change in an dependent variable which is the outcome of the experiment.
According to the given situation, the temperature in which the frogs were kept changed to observe the changes in the rate of heart functioning. So, the temperature is the independent variable which changed before the experiment began.
Please answer it!! Would appreciate a lot!!
Answers
Answer:
1 acid
2 neutralization
3 H+ , OH-
4 metal
5 alkali
Plants and animals can build up or break down rock by increasing weathering, erosion, and
deposition. true or false
Answers
Answer:
false
Explanation:
Weathering describes the breaking down or dissolving of rocks and minerals on the surface of the Earth. Water, ice, acids, salts, plants, animals, and changes in temperature are all agents of weathering.
A teacher attaches two slinky springs to a fixed support. The springs are moved, as shown in the image. Wave A wave B What property of the wave does the teacher change in the movement of each slinky? amplitude,frequency, speed, or wavelength
Answers
Answer:
a changes more because it going higher
Explanation:
Answer:
They will be the same because amplitude doesn't affect speed. A physics teacher attaches a slinky to the wall and begins introducing pulses with different wavelength. The denser the medium at the compression, the greater the amplitude of the wav
Explanation:
