Answer:
Fe₃PO₄
Explanation:
They have given the total mass of the compound, the mass of iron and the mass of phosphorus. So we can find the mass of oxygen.
Mass of oxygen = 12.17 - (7.77 + 1.44) = 2.96g
So we can now find the empirical formula.
Element - mass - Mr - Mass÷Mr - Ratio - Simplest Ratio
Fe - 7.77g - 55.8 - [7.77÷55.8] - [0.14÷0.05] - 2.8 = 3
P - 1.44g - 31 - [1.44÷31] - [0.05÷0.05] - 1
O - 2.96g - 16 - [2.96÷16] - [0.19÷0.05] - 3.8 = 4
[The simplest ratio was obtained by dividing the answer of mass÷mr with the smallest value. Phosphorus had the smallest value of mass÷mr=0.05, so all other answer were divided by 0.05]
Emperical formula = Fe₃PO₄
Choose one metal from the reactivity series that will react safely with dilute sulphuric acid
Please can someone answer quickly
Answer:
Zinc (Zn) will safely react with dilute sulphuric acid.
Explanation:
If correct please give brainliest
Stay safe and healthy
Thank You
predict the product 1-bromo propane is treated with sodium metal
When 1-bromo propane is reacted with sodium metal, the propane and sodium bromide are formed.
Propane and sodium bromide are produced when the 1-bromo propane is reacted with sodium metal. The Bromine which is present in the 2-bromopropane is removed through hydrogenation and combines with the sodium metal which results in the production of propane and sodium bromide.So we can conclude that propane and sodium bromide are produced when the 1-bromo propane is reacted with sodium metal.Learn more about 1-bromo propane here: https://brainly.com/question/25597694
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A quantity of gas has a volume of 250L at 40°C. If the gas is heated to 120°C, what will the new volume be? Which law describes this change?
Answer:
706 L
Explanation:
P1V1 = P2 V2 3 atm 250.0 mL = 1 atm X
T1 T2 290 K 273 K
706 mL = X
List THREE reasons why acidic soil can be a general problem to a natural ecosystem.
Answer:
Ok the poprtion would look like this : x 23
----------- = ----------
230 100
Explanation:
So for the last fill in it could be 52.9 or 60
i hope i got it correct lol pretty sure i did
draw the lewis structure for co with an arrow representing the dipole moment. refer to figure 10.10 to estimate the percent ionic character of the co bond.
The formation of molecule can easily be shown by drawing Lewis dot structure. Since atom's Lewis dot structure has three dots. Therefore, in below given ways, we can have Lewis dot structure of CO.
What is Lewis dot structure?Lewis dot structure is a way to represent the valence electron of an element in the form of dot. These are mainly beneficial in understanding the chemical formula of covalent compound.
Carbon contains four valence electrons, whereas oxygen has six. Carbon has five electrons but oxygen has seven electrons if just one link is established among carbon and oxygen atoms.
The solitary connection formed in between two atoms is insufficient to form an octet on every atom. A triple bond is required to finish the octet of the each atom in CO. The six electrons shared by these two atoms create a triple bond. The dipole moment arrow will point between carbon to oxygen.
Therefore, in above given ways, we can have Lewis dot structure of CO.
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Cells of the immune system are able to respond to the
presence of invading organisms because they
recognize the
A) antigens present on the invaders
B) antibodies present in invading pathogens
C) DNA pattern in the nuclei of viruses
D) antibiotics released from microbes
Answer:
A) antigens present on the invaders
Explanation:
Antigens are substances (usually proteins) on the surface of cells, viruses, fungi, or bacteria. Nonliving substances such as toxins, chemicals, drugs, and foreign particles (such as a splinter) can also be antigens. The immune system recognizes and destroys, or tries to destroy, substances that contain antigens
Which statement concerning simple sugars and amino acids is correct
Answer:
Is there be suppose a file with this?
Explanation:
Mercury is an environmental pollutant that is produced by the burning of
fossil fuels and can be toxic to wildlife and humans. What does this show
about the impact of chemicals on the environment?
A. The harm chemicals could have on the environment outweighs the
benefits that people get from the chemicals.
B. People cannot control the negative effects of chemicals on the
environment.
C. All chemicals that people introduce into the environment are
harmful.
D. The beneficial effects people get from chemicals may have
unintended harmful effects on the environment,
Which of these questions can be answered using science?
What is the best career?
Does water exist on Venus?
Should the use of automobiles be stopped?
Which is the most interesting subject to study?
Answer:
B. Does water exist on Venus?
Explanation:
The first question, " which is the best career " isn't answered by science since it's subjective. different individuals will have different views, but I believe, whatever field a particular person like is the best field career. The third question is a " computer and technology " related question along with It being subjective while the forth
the question, just like the up to two questions, it's also subjective but the second question is in fact understandable by science.
Answer:
Does water exist on Venus?
Explanation:
This answer would be answered using science because venus is another planet and we don't have access to it, the only way we would know would be if scientists traveled there and explored it.
9. Any body of rock or sediment in which
water can flow and be stored is called a(n)
a. well.
b. aquifer.
c. sinkhole.
d. artesian formation.
Answer:
It's option b) Aquifer.
look at the chemicals listed below and answer the questions . iron
water
sand
oxygen
gold
carbon dioxide
helium
carbon
rust
seawater
1. Name the two metals
2.Name a gas that is not an element
3.Name a mixture
4.Name a non metallic element that is a solid .
Answer:
1. gold and rust
2. carbon dioxide
3. sea water
4. carbon
Answer:
1. Gold and Iron
2. Helium
3. Seawater
4.Rust
Explanation:
Through meiosis and sexual reproduction, children that are produced from parents are almost
guaranteed to be unique. Explain how events in meiosis and reproducing through sexual reproduction dramatically increase the genetic variability of a person.
Answer:
Mitosis: Cell division in Asexual Reproduction. 2 Daughter cells exactly like the parent. Heredity is passed to offspring: 100% DNA from 1 parent. Meiosis: Cell division in Sex Cells during Sexual Reproduction.
Explanation:
What happens to the molecules of a gas when the gas is heated?
A.
The gas becomes a liquid.
B.
The molecules collide less frequently.
C.
No change occurs with regard to the molecules.
D.
The average speed of the molecules increases.
Answer:
the correct answer is D because the heat causes the molecules to speed up
What pressure in atmospheres is equal to 45.6 K PA
Answer:
0.450037
Explanation:
Divide kPa by 101.325 as that is 1 atmospheric.
Hope that helps
Answer:
One atmosphere is equal to 101.33 kilopascal
So to change 45.6 kPa to atm, you would divide it by 101.33 kPa
[tex]\frac{45.6}{101.33} = 0.45 \ atm[/tex]
0.45 atmospheres
Tell me What is an element?
Answer:
Any substance that cannot be decomposed into simpler substances by ordinary chemical processes.
Another definition:
An element is the simplest pure substance which can neither be split nor built up from other simpler substances by chemical reaction
How much energy is needed to convert 15.0 g of ice at -5.0 oC into water at 50.0 oC?
Using thermodynamics
[tex]\\ \sf\longmapsto Q=mc∆T[/tex]
[tex]\\ \sf\longmapsto Q=0.015(328)(4184)[/tex]
[tex]\\ \sf\longmapsto Q=20585.28J[/tex]
Consider the van deemter equation. why does increasing the flow rate reduce the contribution of longitudinal diffusion to total plate height?
Answer:
Why does increasing the flow rate reduce the contribution of longitudinal diffusion to total plate height? Increasing the flow rate decreases the time the solute resides in the column, resulting in less diffusional broadening.
Explanation:
The main-group elements are the forty-four elements that occupy groups 1A-8A of the periodic table. Main-group elements are important because of their high natural abundance both in the Earth's crust and in the human body and are commercially valuable. Review the families containing main group elements. Identify all the characteristics that apply to the elements in family IA.
Answer:
The answer is a,b, and c. This is for the USA tesprep videos
Explanation:
The characteristics that apply to the elements in the family are they are highly reactive, they are shiny, soft metals and the element form +1 ions when forming compounds. Thus option a, b and c is correct.
What are main group elements?Main group elements are defined as any of the element belonging to the s and p blocks of the periodic table.
They are most abundant element in universe and on earth.
This elements and their compound are one of the most important economical elements.
They are very good conductor of heat and electricity.
Thus, the characteristics that apply to the elements in the family are they are highly reactive, they are shiny, soft metals and the element form +1 ions when forming compounds. Thus option a, b and c is correct.
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Kingdom:
Domain:
I am made of many cells. My cells have
an organized nucleus, I have two
parents and eat food.
Guess Who?
please help
Answer:
SORRY IM LATE! at least i saw it.
Explanation:
Kingdom is Eucaryota
domain is eucarya
Which term describes the small, somewhat circular pattern of wind?
A Easterlies
B Trade Winds
C polar winds
D convection cells
Answer:
its D, convection cells
Sulfur reacts with oxygen to form sulfur dioxide (SO2(g), Delta. Hf = â€"296. 8 kJ/mol) according to the equation below. Upper S (s) plus upper O subscript 2 (g) right arrow upper S upper o subscript 2 (g). What is the enthalpy change for the reaction? Use Delta H r x n equals the sum of delta H f of all the products minus the sum of delta H f of all the reactants. â€"593. 6 kJ â€"296. 8 kJ 296. 8 kJ 593. 6 kJ.
The enthalpy of this reaction is -296. 8 kJ/mol.
The equation of the reaction is;
S(s) + O2(g) -----> SO2(g)
Recall that the enthalpy of the reaction can be obtained from the formula;
ΔHrxn = ΔHf(products) - ΔHf(reactants)
We know that;
ΔHf S(s) = 0 KJ/mol
ΔHf O2(g) = 0 KJ/mol
ΔHf SO2(g) = -296. 8 kJ/mol
Hence;
ΔHrxn = -296. 8 kJ/mol - [0 KJ/mol + 0 KJ/mol]
ΔHrxn = -296. 8 kJ/mol
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A scientist tested a series of solutions to determine their pH, and recorded the results in this table.
Substance pH
A 9
B 12
C 11
D 14
According to this data, which solution would be most effective at neutralizing a strong acid?
Substance A
Substance B
Substance C
Substance D
Answer:d
Explanation:
5. How many grams of calcium carbonate (CaCO3) are needed to maker 1 liter of 2-molar solution?
029
O 100.19
O 50.19
O 200.2g
Answer: Molar masses 40.8 and 100.1
Explanation:
how many moles are there in 1 mole of argon?
the atomic mass of argon is 39.948. That means that one mole of argon weighs 39.948 grams (39.948 g/mol).
Which chemical reaction occurs between steps 1 and 5?
What is the chemical formula for nitrogen monoxide?
Answer: the formula is NO
where is the atomic mass on the periodic table
Explanation:
At the upper left is the atomic number, or number of protons. In the middle is the letter symbol for the element (e.g., H). Below is the relative atomic mass, as calculated for the isotopes found naturally on Earth. At the very bottom is the name of the element (e.g., hydrogen).
What is released when a bond between two atoms breaks?
A. Electrical energy
B. Chemical energy
C. Intermolecular force
D. Intramolecular force
an ideal gas is allowed to expand from 3.20L to 27.2L at constant temperature. By what factor does the volume increases
Answer:
Explanation:
This is just a ratio question. Factor of increase = 27.2 / 3.20 = 8.50
Look at the diagram. Which shows the correct arrangement of electrons in a hydrogen chloride molecule?
Answer:
D............................
There are two types of chemical compound one is covalent compound and another is ionic compound, covalent compound formed by sharing of electron and ionic compound formed by complete transfer of electron. The correct representation is option D.
What is chemical Compound?Chemical Compound is a combination of molecule, Molecule forms by combination of element and element forms by combination of atoms in fixed proportion.
Covalent bond is present in molecule HCl. Hydrogen has 1 electron in its outermost shell. Chlorine has 7 electrons in its valence shell. So one one electron from each element is shared between them to form a covalent bond.
Therefore, the correct representation of arrangement of electrons in a hydrogen chloride molecule is option D.
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