If you have 100.0 grams of carbon and 100.0 grams or iron, which sample will contain more atoms

Answers

Answer 1

Answer: first you need to solve for the number of moles in each.
1 mole of anything = atomic mas of that element (g)

Carbon has an atomic mass of 12.0107
1 mole of Carbon = 12.0107 g

Iron has an atomic mass of 55.845
1 mole of Iron = 55.845 g

now convert each from grams to moles
(grams of Carbon cancel and you are left with moles of carbon)
100.0 g Carbon x 1 mol Carbon = 8.326 mol Carbon
12.0107 g Carbon

(grams of Iron will cancel and you are left with moles of iron)
100.0 g Iron x 1 mol Iron = 1.791 mol Iron
55.845 g Iron

now we can use avogadro's number to solve for the amount of atoms in each
1 mol = 6.02x10^23 atoms

8.326 mol Carbonx 6.02 x 10^23 atoms = 5.012 x 10^24 atoms Carbon
1 mol Carbon

1.791 mol Iron x 6.02 x 10^23 atoms = 1.078 x 10^24 atoms Iron
1 mol Iron

5.012 x 10^24 atoms Carbon > 1.078 x 10^24 atoms Iron

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How many primary oxygen systems are there? One Five Three Ten

Answers

The answer is three.
There are three type types of oxygen therapy system. The Compressed Oxygen Cylinders or commonly known as green tanks, the Oxygen Concentrators, and the Liquid Oxygen Systems. The type of oxygen system you need varies on the amount oxygen you need.

When ________ are added to an atomic nucleus, energy is produced and this is called a fusion reaction.a. protons
b. neutrons
c. protons or neutrons
d. protons, neutrons or electrons

Answers

When neutrons are added to an atomic nucleus, energy is produced and this is called a fusion reaction. The answer is letter B. To be exact, two nuclei combine to produce a more stable nucleus. The positive charge on both nuclei result in a large electrostatic energy barrier to fusion.

The correct answer is c because the nuc are combing more protns and neutrons. The answer suposed to be protons and neutrons NOT PROTONS OR NEUTRONS?!!

5. Which quantities must be conserved in all chemical reactions?

Answers

In every chemical reaction, the number of atoms of each component reactant, mass, and energy must be conserved.

Law of conservation in chemical reactions

The law of conservation in chemistry states that atoms, matter, mass, and or energy in chemical reactions can neither be created nor destroyed but may be converted from one form to another.

Following this law, the quantities that must be conserved in chemical reactions are:

atoms
mass/matter
energy

More on the law of conservation in chemical reactions can be found here:brainly.com/question/20081187

#SPJ2

In a chemical reaction, the quantities that must be conserved is Matter ( The law of conservation states matter cannot be created nor destroyed.) If the matter is conserved that means the reactants mass is the same as the product. So if matter is conserved, mass is conserved. Another quantity that must be conserved is the number of particles.
Hope this helps! :)

The most common fuel for nuclear fission reactors is:a) coal
b) krypton
c) uranium-235
d) none of the above

Answers

C. Uranium-235

Thus, your answer.

(I took this on a quiz I had, known as a Quick Check to INCA students.)

XD

c) uranium-235 is the correct answer

Which elements combine by forming an ionic bondA) Sodium and potassium
B) Sodium and oxygen
C) carbon and oxygen
D) Carbon and sulfur

Answers

Answer:

B) Sodium and oxygen

Explanation:

Ionic bond: This type of bond is formed when there is a complete transfer of electrons from one element to another element. Ionic bond is the bond which is formed between the two oppositely charged ions and are held by the strong electrostatic attraction. This is formed between the atoms which have high differing electronegativities. In this bonding one element is always a metal and another is a non-metal.

Thus,

Out of the options, B involves a metal and a nonmetal which is sodium and oxygen respectively. Thus, they can form a ionic bond on combining.

A) represents 2 metals, C) and D) represents 2 nonmetals and thus, they cannot form an ionic bond.

Ionic bonds will always form between Non-Metals and Metals.

So the only NM + M is B

Magnesium reacts with hydrochloric acid (HCl) as follows. mc025-1.jpg How many milliliters of hydrogen gas are produced by the reaction 0.020 mol of magnesium with excess of hydrochloric acid at STP? 0.448 mL 0.45 mL 448 mL 450 mL