Which method is used to obtain common salt from rock salt? Why?
how many seconds are there in 15 hours show work
Answer:
54,000 seconds
Explanation:
seconds in 1 hr = 3600
secs in 15 hrs = 3600×15
→ 54000
Essential Question: How is the scientific method used to answer questions?
NO BOTS PLEASE HELP
How many moles are present in 885.46 grams of sodium bicarbonate NaHCO 3 ) ? Molar mass of sodium bicarbonate ( NaHCO 3 )=84.01 g/mol A. 6.3471 x 10^ 24 moles; 0.9877 * 10 ^ - 2 * m * o * l * e * s C. 10.540 moles D 84.007 moles
Answer:
C. 10.540 moles
Explanation:
divide grams by molar mass to get moles
50 PTS!!!!!
What type of chemical reaction is Aerobic Cellular Respiration?
Answer: During aerobic respiration, catabolic reactions convert larger complex organic molecules into ATP, the chemical that drives most physiological processes in the body.
Explanation:
I NEED HELP ASAP !!!!
Answer:
5)A &D 6)B
Explanation:
Mass of Fe is 55.845 u
Mass of Cl is 35.453 u
And their sum is 91.298 u
If the concentration of KMnO4 was 0.0235 M, calculate the number of moles of MnO4- ions that completely reacted with the H2C2O4
The number of moles of KMnO4 is 0.0006 moles.
The equation of the reaction is;
6 H^+(аq) + 2 МnO4^- (аq) + 5 Н2С2O4(аq) → 10 CO2 (g) + 8 H20 (l) + 2 Mn²+ (aq)
We can see that the volume of the titrant used = Final - initial burette reading
= 29.6 mL - 3.4 mL = 26.2 mL
Number of moles of H2C2O4 = 0.139 g/90 g/mol = 0.0015 moles
If 2 moles of MnO4- reacts with 5 moles of H2C2O4
x moles of MnO4- reacts with 0.0015 moles of H2C2O4
x = 2 moles × 0.0015 moles / 5 moles
x = 0.0006 moles
Learn more: https://brainly.com/question/9743981
Hi what is kinematic??
Answer:
Kinematics is a branch of physics concerned with the geometrically possible motion of a body or system of bodies without considering the forces which are involved
Hope it helpsssss.!!!!
how many grams are in 1.35 moles of NH3
non-protein amino acid (A) orithine (B) homocysteine
Answer:
Homocysteine is though to be a non-protein animo acid. however in vintro studies suggest that Homocysteine is likely to be incorporated by inderict
patient requires blood transfusion. what is the next thing to do? discuss
If 2.5 moles of PA react completely, how many
moles of P203 are formed?
Answer:
For every 2 moles of Na used, 2 moles of NaCl are produced.
Explanation:
PLEASE HELP 100 POINTS
identify the type of chemical reaction:
C6H12 + 9 O2 ---> 6 CO2 + 2 H2O
Answer:
Hexenes + Dioxygen = Carbon Dioxide + Water
The reaction type is combustion.
Its reactants are Hexenes - C6H12 and Dioxygen - O2
its products are Carbon Dioxide - CO2 and Water - H2O
Explanation: This was my yesterdays class
Which of the following is not a place where hydrogen can be found on Earth?
A) Natural gas well
B)
Water
Mine
Atmosphere
Answer:
Atmosphere
Explanation:
Natural gas is mainly hydrocarbons like C3H8 and that has hydrogens, water is H2O and had hydrogens, mines have it in the minerals.
Is the formation of sulfur tetrafluoride monoxide endothermic or exothermic?
endothermic means it absorbs energy while exothermic means it releases energy. remember this.
How are oxidation-reduction reactions related to how you use energy?
Answer:
In oxidation reduction reactions, one species gets reduced by taking on electron(s) and another species gets oxidized by losing electrons. The movement of electrons can be used to do work. ... The electron flow can be run through a wire and these electrons can be used to do work (like run a battery). Hope this helps.
convert 8.4 • 10^16 molecules of CO2 to moles
Answer:
0.00000000000000084
Explanation:
A compound has the following percentage composition: 40.0% carbon, 6.72% hydrogen, 53.28% oxygen. What is the amount of carbon moles in 200g of the compound?
Answer:
So we're trying to find the number of carbon moles in the compound. We know that we have 200g of the compound and that 40% of it is Carbon. and 40% of 200 is 80g (change 40% into a decimal and multiply it by 200 and you get 80g)
So 80g of the compound is carbon. In order to find the moles of Carbon, I have to divide the mass by the molar mass of the element.
We know from our periodic table that the molar mass for carbon is 12g/mol
[tex]\frac{80}{12} = 6.67\ mol[/tex]
Therefore we have 6.67 moles of carbon in the compound
Answer:
6.67 moles of carbon in compound
26. Which group in the periodic table contains
an element that can form a blue sulfate
a
compound?
(1) 1
(2)
(3) 11
(4) 17
Answer:
█████████████████
█░░░░░░░░░░░░░░░█
█░░░░░░░░░░░░░░░█
█░░████░░░████░░█
█░░████░░░████░░█
█░░░░░░███░░░░░░█
█░░░░███████░░░░█
█░░░░███████░░░░█
█░░░░██░░░██░░░░█
█░░░░░░░░░░░░░░░█
█████████████████
───█░░░░░░░░░█───
───█░░░░░░░░░█───
───█░░░░░░░░░█───
───█░░░░░░░░░█───
───█░░░░░░░░░█───
───█░░░░░░░░░█───
───█░░░░░░░░░█───
───█░░░░░░░░░█───
───█░░░░░░░░░█───
───█░░░░░░░░░█───
───█░░░░░░░░░█───
█████████████████
█░░░░░░░█░░░░░░░█
█░░░░░░░█░░░░░░░█
█░░░░░░░█░░░░░░░█
█░░░░░░░█░░░░░░░█
Answer:
Option (3) 11
Explanation:
Elements in Group 11 of the periodic table are called Noble Metals.Noble metals have high resistance to oxidation and low chemical reactivity.Noble metal includes Gold (Au), Silver (Ag), Copper (Cu).Copper forms a blue sulfate when reacts with Sulphuric Acid.Formula of Copper Sulfate : CuSO4.Since, Copper belongs to the Group 11 elements of the periodic table hence, option (3) is the right answer.For more information:
https://brainly.com/question/569321
what is the true of lewis base
Answer: To answer your question of what is true of a lewis base, it is true that a lewis base donates electron pairs.
Explanation: A Lewis base is any substance, such as the OH- ion, that can donate a pair of nonbonding electrons. A Lewis base is therefore an electron-pair donor.
Which of the following is a challenge of prosthetic engineering that has been met through tissue engineering?
- Predicting failure
- Biocompatibility
- Strength
- Power
Answer:
Biocompatibility
Explanation:
I’m a genius and it’s the answer :D
Biocompatibility is a challenge of prosthetic engineering that has been met through tissue engineering. Hence, option B is correct.
What is Biocompatibility?Biocompatible materials are used in medical devices, such as menstrual cups, stents, or ventilators.
A biocompatibility problem might happen when some of the materials are trapped in the patient's gingival sulcus.
Tissue engineering is an important field of regenerative medicine for tissue repair (after damaged caused by a disease or an accident, for example).
To offer this possibility, stem cells are important tools owing to their capacity to differentiate into a large number of cells according to the stimuli provided.
Hence, option B is correct.
Learn more about Biocompatibility here:
https://brainly.com/question/16037547
#SPJ2
please help me!! DUE TOMORROW :(
Answer:
It’s in the photo, sorry if it’s really messy!
Explanation:
Please ask if you have any questions!
Please write out the balanced chemical equations for the following
reactions.
**Ensure you write the states of the reactants and products.**
• zirconium chloride reacts with scandium dichromate
Answer: Super idol
Explanation:
chinese malapoks
How many grams of O2 are reacted when 3.5
mols of P203 are formed?
Lithium has an atomic mass of 6.941 amu. Lithium has two isotopes. One isotopes has a mass of 6.015 amu with a relative abundance of 7.49%. What is the mass of the other isotopes?
Explanation:
List the known and unknown quantities and plan the problem. Change each percent abundance into decimal form by dividing by 100. Multiply this value by the atomic mass of that isotope. Add together for each isotope to get the average atomic mass.
Answer:
The atomic mass of second isotope is 7.016
Explanation:
Given data:
Average Atomic mass of lithium = 6.941 amu
Atomic mass of first isotope = 6.015 amu
Relative abundance of first isotope = 7.49%
Abundance of second isotope = ?
Atomic mass of other isotope = ?
Solution:
Total abundance = 100%
100 - 7.49 = 92.51%
percentage abundance of second isotope = 92.51%
Now we will calculate the mass if second isotope.
Average atomic mass of lithium = (abundance of 1st isotope × its atomic mass) +(abundance of 2nd isotope × its atomic mass) / 100
6.941 = (6.015×7.49)+(x×92.51) /100
6.941 = 45.05235 + (x92.51) / 100
6.941×100 = 45.05235 + (x92.51)
694.1 - 45.05235 = (x92.51)
649.04765 = x 92.51
x = 485.583 /92.51
x = 7.016
The atomic mass of second isotope is 7.016
____________________________________________________
(Hope this helps can I pls have brainlist (crown)☺️)
What law of motion corresponds with this statement?
"A rifle kicks."
first law
third law
second law
Answer:
3rd lawl
Explanation:
a rifle kick is when you fire a projectile and you feel a force pushing against your hand. Rifles normally have heavier projectiles so there is more force pushing back against you. example, if you were sitting on a spinny chair with wheeles and your friend is sitting on another, and you push each other while on the chair, you will both go backward, but the lighter person will go back more. for every action, there is an equal and opposite reaction
that is the third law, also said as: "When one body exerts a force on a second body, the second body simultaneously exerts a force equal in magnitude and opposite in direction on the first body."
A cell phone manufacturer recalled some 50 million lithium batteries installed in cell phones because the batteries were at risk of overheating and exploding. The hazardous waste characteristic of the batteries in this example is __________.
Answer:
universal waste
hope it helps
A solution that contains 3 grams of solute dissolved in 100 millimeters of solution is:
a) 3% m / m
b) 3% m / v
c) 10% m / v
Answer:
the answer is correct part another is a part
Explanation:
c part
Convert 1.16 mol of calcium cyanide, Ca(CN)2, to mass.
Convert 23 grams of nitrogen dioxide into moles of nitrogen dioxide.
Answer:
We have to convert the following into moles.
(a) 32 g of oxygen gas = 1 mole
1 gram of oxygen gas = 1/32 mole
Given that 12 g of oxygen gas
No: of moles = given mass / molar mass
= 12 / 32 = 0.375 mole
(b) 18 g of water = 1 mole
1 gram of water = 1/18 mole
Given that 20 g of water
No: of moles = given mass / molar mass
= 20 / 18 = 1.111 mole
(c) 44 g of carbon dioxide = 1 mole
1 gram of CO2 = 1/44 mole
Given that 22 g of carbon dioxide
No: of moles = given mass / molar mass
= 22 / 44 = 0.5 mole
Explanation: