Magnesium and iron are metallic elements. How does a mole of magnesium compare with a mole of iron?a) A mole of iron has more atoms.
b) They both have the same mass.
c) A mole of magnesium has more mass.
d) They both have the same number of atoms.

Answers

Answer 1

Answer: Given a mole each for iron and magnesium, the number of atoms of each element is equal. Iron has a greater mass due to its greater molecular weight. The correct statement among the choices is D.

Answer 2

Answer:

Answer: d) They both have the same number of atoms.

Explanation:

A mole is defined as the amount of substance that contains Avogardro number of the substance. Avogadro's number is given by $6.022* 10^(23)$ .

$1mole=6.022* 10^(23)particles$

According to avogadro's law, 1 mole of every substance weighs equal to its molecular mass and contains avogadro's number $6.023* 10^(23)$

Thus 1 mole of magnesium and iron both contains $6.023* 10^(23)$ particles.

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Hydrocarbons are separated from each other by a process called cracking distillation. a. True b. False

What type of bond is this combination most likely to form?

Answers

Sodium is a group 1 element with atomic number 1. It has 11 electrons. It is soft reactive metal. It has 1 valence electron.

Fluorine is a group 7 element, a hologen with 7 valence electron. It is a most reactive non metal.

When sodium react with fluorine, ionic bond is formed in the resulting compound sodium fluoride.

One sodium and fluorine each totaling 2 atoms are enough to make the bond.

As the bond is formed, both atoms have octet structure. That is they each have 8 electrons on their outermost shells.

The positive charge on sodium indicates that sodium had lost 1 electron to fluorine atom.

The negative charge on fluorine ion indicates that fluorine atom had gained 1 electron from sodium atom to form negative ion.

The name of the compound is sodium fluoride with formula NaF.

brainliest please <3

Which ion is the only negative ion produced by an Arrhenius base in water?(1) NO3– (3) OH–
(2) Cl– (4) H–

Answers

The correct answer is option 3. It is the hydroxide ions that is produced by an Arrhenius base in water. According to Arrhenius, acid-base reactions are characterized by acids which forms hydronium ions in water and bases which dissociates in aqueous solution to form hydroxide ions.

What did Thomson’s model of the atom include that Dalton’s model did not have?

Answers

Thomson's model included Protons and Electrons. His model is referred to as 'Plum Pudding' because of it.

Answer: subatomic particles: negative charges (electrons) distributed in a mass of positive charge.

Explanation:

1) John Dalton's model depicted the matter as the combination of tiny, indivisible particles, called atoms.

According to this model, atoms can not be created, destroyed, or divided into smaller particles.

2) When it was discovered that all forms of matter contained negative particles, by multiple experiments with cathode ray tubes, those particles where named electrons.

3) J.J. Thompson could determine that the mass of those negative charges was much smaller that the mass of the smallest atom (hydrogen). Concluding that existed smaller particles than the atom. Hence, Dalton's model was wrong: atoms was divisible into smaller subatomic particles.

4) Then J.J Thompson proposed the plum pudding model, in which the electrons (plums) are embeded into a uniform positive mass (pudding).

A saturated solution of NaNO3 is prepared at 60.°C using 100. grams of water. As this solution is cooled to 10.°C, NaNO3 precipitates (settles)out of the solution. The resulting solution is saturated. Approximately how many grams of NaNO3 settled out of the original solution?
(1) 46 g (3) 85 g
(2) 61 g (4) 126 g

Answers

The answer is 46 g

The explanation :

According to the attached curve of the relation between the temperature and the grams in solutions:

-we can see from the curve that the grams of NaNO3 at 60°C = 126 g

-and the grams of NaNO3 at 10°C = 80 g

-so, To get the grams of NaNO3 settled out of the original solution, we will subtract the grams of NaNO3 at 10°C - the grams of NaNO3 at 60°C

126 g - 80 g = 46 g

∴ the correct answer is 46 g

The answer is (1) 46g. This is related to the solubility curve of the NaNO3. The solubility of NaNO3 under 60 ℃ is 126 g. And the solubility under 10 ℃ is 80 g. So the NaNO3 precipitates is 126-80=46 g.

Which reactants would lead to a spontaneous reaction? Mn2+ and Al
Mn and Al3+
Al and Mn
Mn2+ and Al3+

Answers

The reactants that would lead to a spontaneous reaction are Mn2+ and Al3+. Al and Mn are not because they are stable reactants. Mn and Al3+ are not because Mn is stable. Mn2+ and Al are not because Al is stable.

Answer:

ITS B

Explanation:

I took the test on edge

Which low-energy state of condensed matter is characterized by structural rigidity and resistance to changes of shape or volume?

Answers

Solid is the low energy state of condensed matter is characterized by structural rigidity

Final answer:

The low-energy state of condensed matter characterized by structural rigidity and resistance to shape or volume changes is the solid state. This is due to its atomic structure, where molecules are organized in a rigid lattice, allowing the solid to maintain its shape and resist deformation.

Explanation:

The low-energy state of condensed matter that is characterized by structural rigidity and resistance to changes of shape or volume is defined as a solid. Going back to its atomic structure, atoms in a solid are in close contact and the forces between them allow the atoms to vibrate but not to change positions with neighbouring atoms. Basically, this atomic regulation in a solid form leads to its characteristic rigidity and resistance to shape or volume alterations.

Molecules in a solid, unlike in a liquid or gas, are organized into a lattice formation and retain this pattern despite external forces. This allows the solid state to resist deformation, maintain its shape, and have fairly constant volume. The ability of solids to resist compression is also due to their lattice structure, where atoms are at a relatively fixed distance apart, and under compression, the atoms would be forced into one another.