Answer:
single-celled organisms
Explanation:
How many grams of Fe can be produced when 6.50 g of Fe2O3 reacts?
Answer:
Mass of Fe produced = 4.468 g
Explanation:
Given data:
Mass of Fe produced = ?
Mass of Fe₂O₃ react = 6.50 g
Solution:
Chemical equation:
2Fe₂O₃ → 4Fe + 3O₂
Number of moles of Fe₂O₃ ;
Number of moles = mass/molar mass
Number of moles = 6.50 g/159.69 g/mol
Number of moles = 0.04 mol
Now we will compare the moles of iron and ironoxide.
Fe₂O₃ : Fe
2 : 4
0.04 : 4/2×0.04 = 0.08 mol
Mass of iron produced:
Mass = number of moles × molar mass
Mass = 0.08 mol × 55.85 g/mol
Mass = 4.468 g
Sonya is studying a nonmetal element. She learns that the element is like other elements in its group because it can bond to form a salt or an acid. She also learns that the element is the most reactive element in its group. Which element is Sonya most likely studying?
-----
sulfur (S)
neon (Ne)
fluorine (F)
iodine (I)
Answer:
I don't know much about chemistry but fluorine us the most reactive halogen and element
Ram has power of 550 watt.What does it mean?
Answer:
for electricity, watts as in back to the future "1.21 jigga watts"!
Explanation:
What type of compound is disulfur dichloride?
a. organic compound
b. acid (ionic compound)
c. covalent compound
d. ionic compound
Answer:
Covalent compound
Explanation:
It is formed by covalent bonds, in which the atoms share a pair of valence electrons
What is the mass of 0.25 mole of sodium?
Student places the ends of the wires The piece of iron shown in the picture which Physical property of iron is being tested in this picture
A. Thermal conductivity
B. Ductility
C. Electrical conductivity
D. Magnetism
Answer: C
Explanation:
Electrical conductivity
What happens in a chemical reaction?
a. Atoms are destroyed.
b. Atoms are created.
c. Molecules are created.
d. Atoms are rearranged.
Please select the best answer from the choices provided
A
B
С
D
Pls help please :((
Answer:
During the reaction, chemical bonds break in the reactants and new chemical bonds form in the products.
Answer:
d. Atoms are rearranged.
Explanation:
What are two ways to make a sugar cube dissolves faster in water
Answer:
put it in a warm water or you put it in an ordinary water
10 The rate of the reaction between hemoglobin (Hb)
and carbon monoxide (CO) was studied at 20°C.
The following data were collected with all
concentration units in u mol/L. (A hemoglobin
concentration of 2.21 u mol/L is equal to
2.21 x 10 mol/L.)
[Hblo [CO),
Initial Rate
(u mol/L) (u mol/L) (u mol/Ls)
2.21
1.00
0.619
4.42
1.00
1.24
4.42
3.00
3.71
(a) Determine the orders of this reaction with
respect to Hb and CO.
(b) Determine the rate law.
(c) Calculate the value of the rate constant.
(d) What would be the initial rate for an
experiment with [Hb]o =3.36 u mol/L
[CO] =2.40 4 mol/L?
Answer:cookie
Explanation:
The charge of an atom is determined by the-
Answer:
electrons? not sure if im right tho
How do trends in the periodic table help predict the properties of an element
What is the orbital notation for Al+3?
O 1s2 2s22p6
O 182 2s2 2p6 352 3p1
O 1s2 2s2 2p6 352 3p5
O 1s2 2s22p6 352 3p6
Help?
What happens in the redox reaction below? Select all that apply.
Na + F + NaF
A- Fluorine loses an electron.
B- Sodium loses an electron.
C- Sodium gains an electron.
D- Fluorine gains an electron.
E- Sodium is oxidized.
A beverage manufacturer wants to increase The solunility of carbon dioxide in its carbonated drinks as beverages produced which action will increase the solubility of CO2 gas the most
A. Decreasing the pressure on it
B. Increasing stirring
C. Decreasing its temperature
D. Increasing its temperature
Answer: C
Explanation:
How many grams of heptane are needed to completely react with 106 g of O2?
Answer:
21.9g
Explanation:
The balanced reaction for the combustion of heptane is;
C7H16 + 11 O2 ------> 7 CO2 + 8 H2O
from the balanced reaction,
1 mole of heptane = 11 moles of O2
converting to mass
100g of Heptane = 484g of O2
xg of Heptane = 106g of O2
x = 106×100/484
x = 21.9g
Therefore, 21.9g of heptane is needed to completely react with 106 g of O2
please don't forget to mark brainliest if helpful
How many grams of sodium hydroxide are present in a 250.0 ml of a 0.600M NaOH solution?
List the following atoms in order of increasing electronegativity: O, AI, Ca
Answer:
CA, AI, O
Explanation:
Look at a periodic table and locate each element. Note their electronegativity levels.
What is some of the evidence used by Galileo to support Copernicus’s model and disprove Aristotle and Ptolemy’s?
Each planet spins in an epicycle.
Planets appear to move backward.
Jupiter has moons orbiting it.
The religious and cultural beliefs supported this model.
Answer:
Hey sorry if i took too long but I believe it is A
Explanation: sorry if im wrong
hope this helps
Answer:
It is A
UW
Explanation:
PLEAE HELP ASAP WILL MARK BRAINLYLIST! Question 2 the answers are under 2
Answer:
Alkali Metals
Explanation:
They're the most reactive elements in group one.
If you 0.123 moles of CO2 is placed at 300.1 K and 2.91 atm pressure. Determine its volume.
show with work
Answer:
1.04 L
Explanation:
A mystery element "X” has two stable isotopes X-50 which occurs 40% of the time
and X-60 which occurs 60% of the time. What is the average mass of element "X"?
A-50 amu
B-54 amu
C-56 amu
D-60 amu
Answer:
probaly C
Explanation:
I'm not sure on this one...
Which type of macromolecule is the sugar fructose? It ends in "ose" which is a clue.
O lipid
O nucleic acid
O carbohydrate
protein
Answer:
C) Carbohydrate
Explanation:
Sugar is a carbohydate
Carbohydrate is a type of macromolecule is the sugar fructose.
What is carbohydrate?A carbohydrate is a biomolecule consisting of carbon, hydrogen and oxygen atoms. Carbohydrates, or carbs, are sugar molecules which is a main nutrient found in foods and drinks.
Your body breaks down carbohydrates into glucose that provides energy to the body so we can conclude that carbohydrate is type of macromolecule is the sugar fructose.
Learn more about macromolecules here: https://brainly.com/question/3680582
Which event is fast change that occurs as a result of plate tectonics?
A. Hurricane
B. Volcanic eruption
C. Formation of an ocean basin
D. Convection current
Answer: B. Volcanic eruption
Explanation:
A volcano is firmed when molten rocks is formed to the surface of the Earth. Volcanoes release molten rocks, ash, and gases to the Earth's surface.
Volcanoes are agents of change as the eruptions lead to the formation of new landforms and also destroy several things that they come in contact with.
Volcanic eruptions also occurs due to plate tectonics. Other events that happen due to plate tectonics also include earthquakes, and tsunamis.
Answer:B
Explanation:
The three states of matter most common on Earth are solids, liquids, and gases. Which sequence the states order from least particle motion to most?
In solids the particles are closely packed and have least particle motion. Particles in liquids have some space to move than in solids. In gas phase, all the particles are far apart and they are free to move anywhere. Hence, the order based on particle motion is solid < liquid < gas.
What is particle motion?In all states matter is made of particles called atoms. These atoms can move within the allotted space and this mobility is affected by the temperature and kinetic energy.
In solids, particles are closely packed as a chain and no space to move apart. The strong intermolecular force make them hold. In liquid phase, there is small space that's why particle can flow in liquids.
In gas phase, particles are far apart and free to diffuse in the atmosphere. The kinetic energy of atoms in gas phase is higher than in other two phases. Hence the order of particle motion is solid < liquid < gas.
Find more on particle motion :
https://brainly.com/question/11155407
#SPJ2
What element has 2 occupied principals of energy levels
Describe how simple distillation is used to separate water from an aqueous solution of sodium
sulfate.
Answer:
hbyiy
Explanation:
Pls pls pls pls pls pls help
what type of reaction is 2 Al2O3(s) → 4 Al(s) + 3 O2(g)
Answer:
Decomposition or cracking
Explanation:
Given reaction:
2Al₂SO₃ → 4Al + 3O₂
This reaction is a decomposition or cracking reaction.
In such a reaction, two or more products are formed from a single reactant; e.g;
A → B + C
The breakdown of a compound into component individual elements or other compounds falls into this type of reaction.
Why do we get hot when we exercise?
which two geologic events occur very slowly as a result of tectonic forces and movement.
A. Destruction of forests
B. Seafloor spreading
C. Glacier formation
D. Mountain range formation
PLZZ HELPP!!!
Answer:
mountain range formation, and seafloor spreading
Explanation:
I TOOK THE TEST!!
and it was right
