The oxygen atom is smaller than the sulfur atom because _____(1) the outer electrons of oxygen are more effectively screened from the nuclear charge than are sulfur’s outer electrons. (2) the outer orbitals of oxygen are located closer to the nucleus than those of sulfur. (3) the oxygen atom is larger than the sulfur atom. (4) the outer electrons of oxygen are less effectively screened from the nuclear charge than are sulfur’s outer electrons. (5) the outer orbitals of oxygen are located farther away from the nucleus than those of sulfur.

Answer:

H20

Explanation:

peroxide would also eat bacteria along with the water

Final answer:

The primary intermolecular forces which act between a molecule of hydrogen peroxide (H2O2) and an iron(III) cation (Fe3+) are ion-dipole attractions. These arise due to the polar nature of the H2O2 molecule and the charged state of the Fe3+ ion.

Explanation:

The kind of intermolecular forces that act between a hydrogen peroxide molecule and an iron(III) cation chiefly involve ion-dipole attractions, which are a type of intermolecular force. This occurs due to the polar nature of the hydrogen peroxide molecule (H2O2) and the charged iron(III) ion (Fe3+).

The O-H bonds in the hydrogen peroxide molecule are polar as oxygen exhibits a higher electronegativity than hydrogen, meaning that it has a tendency to draw electrons closer to itself. This results in a dipole with partial negative charge residing at the oxygen end of the molecule, and a partial positive charge at the hydrogen end. Meanwhile, the iron(III) ion has a positive charge. This makes for a strong ion-dipole interaction between the two.

It's important to remember that intermolecular forces are the attractions between molecules which are crucial to their physical properties, while intramolecular forces are those that keep a single molecule intact. Further, although the term 'hydrogen bond' may suggest a bond between hydrogen and other atoms, it is, in fact, an intermolecular attraction force which is stronger than others like dipole-dipole attractions and dispersion forces.

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Answer: iron atoms

Explanation:

According to avogadro's law, 1 mole of every substance weighs equal to the molecular mass and contains avogadro's number of particles.

contains= 2 atoms of iron

contains=  atoms of iron

thus 0.32 moles of contains=  atoms  of iron

Thus the sample would have iron atoms.

Answer:

a) NaHCO3 = 0.504 M

b) H2SO4 = 1.325 M

c) NaCl = 0.610 M

Explanation:

Step 1: Data given

Moles = mass / molar mass

Molarity = moles / volume

a. 19.5 g NaHCO3 in 460.0 ml solution

Step 1: Data given

Mass NaHCO3 = 19.5 grams

Volume = 460.0 mL = 0.460 L

Molar mass NaHCO3 = 84.0 g/mol

Step 2: Calculate moles NaHCO3

Moles NaHCO3 = 19.5 grams / 84.0 g/mol

Moles NaHCO3 = 0.232 moles

Step 3: Calculate molarity

Molarity = 0.232 moles / 0.460 L

Molarity = 0.504 M

b. 26.0 g H2SO4 in 200.0 mL solution

Step 1: Data given

Mass H2SO4 = 26.0 grams

Volume = 200.0 mL = 0.200 L

Molar mass H2SO4 = 98.08 g/mol

Step 2: Calculate moles H2SO4

Moles H2SO4 = 26.0 grams / 98.08 g/mol

Moles H2SO4 = 0.265 moles

Step 3: Calculate molarity

Molarity = 0.265 moles / 0.200 L

Molarity =1.325 M

c. 15.0 g NaCl dissolved to make 420.0 mL solution

Step 1: Data given

Mass NaCl = 15.0 grams

Volume = 420.0 mL = 0.420 L

Molar mass NaCl = 58.44 g/mol

Step 2: Calculate moles NaCl

Moles NaCl = 15.0 grams / 58.44 g/mol

Moles NaCl = 0.256 moles

Step 3: Calculate molarity

Molarity = 0.256 moles / 0.420 L

Molarity =0.610 M

Answer:

Molarity= 4M

Explanation:

n= CV

24= C×6,

C= 24/6 = 4M

Answer:4M

Explanation:

Number of moles=24

Volume=6L

Molarity=number of moles ➗ volume

Molarity=24 ➗ 6

Molarity=4M

Answer:

3grams

Explanation:

The reaction for the production of Magnesium dioxide will be

Mg + O2  → MgO

we have 5g of MgO (molar mass 40g)

no of moles of MgO = 5/40 = 0.125

Using unitary method we have

1 mole of Mg require 1 mole of MgO

0.125 Mole of MgO = 0.125mole of Mg

n = given mass /molar mass

0.125 = mass / molar mass

mass = 0.125* 24 = 3grams

Final answer:

To produce 5 grams of magnesium oxide, you would theoretically need approximately 3.013 grams of magnesium, based on the mole ratio and molecular weights of magnesium and magnesium oxide.

Explanation:

To calculate the amount of magnesium needed to produce magnesium oxide, we first need to understand the balanced chemical equation for the reaction: Mg + 1/2O2 → MgO. This equation shows that a mole of magnesium (24.31 g) reacts with half a mole of oxygen (8 g) to produce a mole of magnesium oxide (40.31 g). Therefore, if we want to produce 5g of magnesium oxide, we'll need: (5 g MgO * 24.31 g Mg) / 40.31 g MgO = 3.013 g Mg, approximately which is the theoretical amount of magnesium needed.

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Answer:

The glass cup falling from the counter

Explanation:

the glass isn't changing in any chemical way. it's still made of the same material, just broken apart.

Final answer:

Physical changes involve the alteration of the state or appearance of matter, without changing the composition. An example is solid wax turning into liquid wax when heated, or steam condensing inside a cooking pot.

Explanation:

The question asks for an example of a physical change. Physical changes involve alterations in the state or appearance of matter, without changing its composition. For example, solid wax turning into liquid wax when heated is a physical change. The wax is still the same substance, it's just in a different state. Similarly, steam condensing inside a cooking pot is also a physical change. The water vapor turns back into liquid water, but it's still water. These are distinguished from chemical changes, which transform one substance into a different substance.

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