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.
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
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...
How many grams of sodium hydroxide are present in a 250.0 ml of a 0.600M NaOH solution?
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.
Which can not be chemically broken down into simpler substances
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:
A chemical equation is shown:
Al + O2 A1203
According to the law of conservation of mass, how many atoms of oxygen exist in the products of this reaction?
6
5
3
2
Answer:
Well the answer of 1 and 3 is WRONG based on the 1 star review and the answer of 3 is wrong too I just took a test with this question.
Explanation:
Sorry...
Answer:
it's 6
Explanation:
I just took the test and got it right
What are the products of photosynthesis
Answer:Glucose, Oxygen and Water
Explanation:
Answer:
Hello i have don this... : )
Explanation:
It is oxygen and glucose
Have a good day im 100% sure this is... i forgot but it is before or after the asexual and sexual lessons
I added a meme for no reason you will only get it if you have read heroes of Olympus
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
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:
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
how many molecules of HCI would react with 1 mol of MgO?
Answer:
C.
Explanation:
MoleculesHcl = (1 molMgO/1)(2molHCL/1molMGO)(6.02x10^23/1molHCL) = 1.204x10^24
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 7.28 g sample of chromium metal was heated to produce chromium oxide. The weight of the compound was 10.63 g. What is the percent chromium in this compound?
Answer:
68.48%
Explanation:
The percent mass of an element in a compound tells us about the amount of such element contributed to the total compound.
In this case, 7.28 g sample of chromium metal was heated to produce chromium oxide with weight of 10.63 g. The percent mass of chromium in chromium oxide can be calculated by using the formula:
%mass of Cr = mass of Cr/mass of Chromium oxide × 100%
%mass of Cr = 7.28/10.63 × 100
%mass of Cr = 0.6848 × 100
%mass of Cr = 68.48%
substance in which two or more atoms are bonded together.
molecule(s)
two or more atoms touching means they are connected as molecules which also make up compounds
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:
A sample from one of Earth's oceans has a salinity of 34. What is the concentration of dissolved salts in this sample of seawater when expressed in ppmppm
Answer:
Concentration of dissolved salts = 34,038.76 ppm
Explanation:
Given:
Salinity of ocean water = 34
Find:
Concentration of dissolved salts
Computation:
Salinity of ocean water = 34 g/l
1g/l = 1001.14 ppm
Concentration of dissolved salts = 1001.14 ppm x 34
Concentration of dissolved salts = 34,038.76 ppm
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
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
Pls pls pls pls pls pls help
In addition to how much force Earth exerts on the object, which features of an object affect its weight? edginuity
Answer:A
Explanation:
Describe how simple distillation is used to separate water from an aqueous solution of sodium
sulfate.
Answer:
hbyiy
Explanation:
Why do we get hot when we exercise?
Does water take up space (have volume)? Yes or no
Answer:
Yes
Explanation:
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
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:
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
Please help I need a answer to both
Hi , I’m really sorry because I just have the first question... so here it is :
So it is 0.52 mol .
Have a nice day .
What element has 2 occupied principals of energy levels
