CHEMISTRY MIDDLE SCHOOL

Which of these substances is the least acidic?

Answers

Answer 1

Answer:

Answer:

Solution A, pOH=1.5

Explanation:

Answer 2

Answer: What are the substances

Related Questions

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What kind of changes cause iron to rust ?
Lewis dot structures explicitly show which of the following about a molecule?The total electron configuration of each atom in the moleculeThe three-dimensional geometry of the atoms in the moleculeThe ionic charge on each atom within the moleculeThe way atoms share electrons to be connected to one another within the molecule
Which organic molecule is digested into simple sugar?

Review the types of elements that create ionic bonds aswell as the types of elements that create covalent bonds.
• N2 • CCl4 • SiO2
• AlCl3 • CaCl2 • LiBr

Answers

Answer:

N2 Covalent

CCl4 Covalent

SiO2 Covalent

AlCl3 Covalent

CaCl2 Ionic

LiBr Covalent

Explanation:

With covalent bonds, there is a sharing of electron pairs between the atoms.

With ionic bonds, there is complete transfer of valence electrons between atoms. Formed by the interaction of a metal with a non-metal.

Where:

Electrons aren't transferred in covalent bonds.

Protons aren't transferred in covalent bonds

Protons aren't shared in covalent bonds

N3-

C4+

Cl-

Si4+ = Metal

O2- = Non-metal

Al3+ = Metal

Li+ = Metal

Ca2+ = Metal

Br 1-, 1+, 5+ = Halogen

N2 = N3- and N3- Covalent

CCl4 = C4+ and Cl- x4 Covalent

SiO2 = Si4+ and O2- x 2 Metal with non metal Covalent

AlCl3 = Al3+ and Cl- x 3 Covalent Though this one is complex as to why because it seems like it should be ionic

CaCl2 = Ca2+ and Cl- x 2 Metal with non-metal Ionic

LiBr = Li+ and Br- Covalent as neither is a non-metal

How many atoms are in 4 Al2(SO3)3

Answers

There are 337.23 × 10²³ atoms in 4 moles of aluminum sulfite Al₂(SO₃)₃.

Explanation:

The questions ask how many atoms are in 4 moles of aluminum sulfite Al₂(SO₃)₃?

To answer this we use the Avogadro's number to devise the following reasoning:

if in 1 mole of Al₂(SO₃)₃ there are 14 × 6.022 × 10²³ atoms

then in 4 moles of Al₂(SO₃)₃ there are X atoms

X = (4 × 14 × 6.022 × 10²³) / 1 = 337.23 × 10²³ atoms

Learn more about:

Avogadro's number

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Select the correct answer.If a silver nitrate solution is added to excess sodium sulfide, this reaction takes place: 2AgNO3(aq) + Na2S(aq) → Ag2S(s) + 2NaNO3(aq).
Suppose you use 0.0150 liter of a 2.50 M solution of silver nitrate. Assuming the reaction goes to completion, how much silver sulfide is produced? Use the periodic table.
A. 1.49 g
B. 4.65 g
C. 9.30 g
D. 18.6 g

Answers

Answer:- B. 4.65 g.

Solution:- The given balanced equation is:

$2AgNO_3(aq)+Na_2S(aq)\rightarrow Ag_2S(s)+2NaNO_3(aq)$

It asks to calculate the mass of silver sulfide formed by when 0.0150 liters of 2.50 M of silver nitrate are used.

Moles of silver nitrate are calculated on multiplying it's liters by its molarity and then on multiplying by mol ratio, the moles of silver sulfide are calculated. These moles are multiplied by the molar mass to convert to the grams.

Molar mass of $Ag_2S$ = 2(107.87)+32.06 = 247.8 g per mol

The dimensional set up for the complete problem is:

$0.0150L((2.50molAgNO_3)/(1L))((1molAg_2S)/(2molAgNO_3))((247.8gAg_2S)/(1molAg_2S))$

= $4.65gAg_2S$

So, the correct choice is B. 4.65 g.

Answer:

that jawn gon be 4.65 g

How does the temperature and pressure change inside the earth, moving downward from the crust to the core?A.
Both temperature and pressure decrease.

B.
Both temperature and pressure increase.

C.
Temperature increases, but pressure decreases.

D.
Temperature decreases, but pressure increases.

Answers

B. Both temperature and pressure increase

Answer:

The answer you're looking for is,

B) Both the temperature and the pressure increase.

The coefficients in the balanced chemical equation are used to determine mole ratios.Write the mole ratios found in the reaction "Making water
H2: _____0
H2;
H20
___02: _
H20

Answers

Answer:

1 mole of HCl or NaOH gives you 1 mole of H2O , then the number of moles in H2O is: [ 1÷1×1 ] = 1 mole.

Explanation:

7. Two teams are competing in a tug-of-war contest. Team A is pulling at 4000N and Team B is pulling at 4900N is the opposite direction. Sketch the forces and show the net force exerted. Which team is winning Is this force balanced or unbalanced?

Answers

Answer:

The Team B is winning. The force is unbalanced.

Explanation:

Step 1: First we must fix a positive sense to the forces exerted. We take as positive the force of 4900 N.

Step 2: Now we must add forces to determine the value of the resulting force ( $F_(r)$ ).

$F_(r)$ = 4900 N - 4000 N = 900 N

Since $F_(r)$ is positive, team B will win the competition.

The resulting force is unbalanced because if it is balanced it should give 0.

Have a nice day!

Final answer:

In the tug-of-war competition, team B is winning because it is exerting a stronger force. The net force is 900N to the left, showing an unbalanced force scenario, which will cause a change in motion or acceleration of the teams towards team B.

Explanation:

Let's visualize this tug-of-war contest as a simple force diagram. To the right, we have team A exerting a force of 4000N, and to the left, we have team B exerting a stronger force of 4900N. In terms of net force, this means we subtract the smaller force (team A's force) from the larger one (team B's force), giving us a net force of 900N in the direction of the stronger force—in this case, to the left, following team B.

This situation represents an unbalanced force scenario because the two forces are not equal in magnitude and do not cancel each other out. As a result, there is a net force leading to an acceleration—according to Newton's Second Law of Motion, any unbalanced force will cause a change in motion or acceleration. So, in this scenario, team B will be winning.