To filter or trickle through a porous substance

->

never [62]

Answer:

The answer to your question is probably false

7 0

3 years ago

Number of moles in 7.8 x 10(at top of 10 like exponent 23) molecules

Anarel [89]

First you need to know Avogadro's number which is 6.02 times 10^23 molecules in 1 mole of a substance. So now just divide your number by Avagadro's number to get the number of moles.

6 0

3 years ago

Pls answer

Ne4ueva [31]

the distance driven by the car and the time it took to complete the race

Explanation:

To determine the average speed of the winning car in the race, the distance driven by the car and the time it took to complete the race. The average speed is the rate of change of the distance covered by a moving body with time.

it is usually given in m/s or km/hr

Average speed = $\frac{distance covered by a moving body}{time}$

The distance and time will give sufficient information needed to evaluate the average speed.

Learn more:

Average speed of car brainly.com/question/568302

Speed brainly.com/question/8893949

#learnwithBrainly

4 0

4 years ago

Which structure is the arrow pointing to?<br><br> What is the function of this organelle?

S_A_V [24]

The structure the arrow is pointing to is the nucleus and it helps store genetic material (DNA) in living cells.

<h3>What is an organelle?</h3>

Organelle is a specialized structure found inside cells that carries out a specific life process. examples are ribosomes, vacuoles, nucleus etc.

The nucleus is the large membrane-enclosed organelle found in eukaryotic cells which contains genetic material.

The nucleus is located at the center of living cells and it functions to store genetic material called DNA. The DNA is transferred to offsprings for inheritance of traits.

According to this question, a microscopic image of a cell is shown. The arrow pointed to the nucleus of the cell.

Learn more about nucleus at: brainly.com/question/4031640

#SPJ1

6 0

1 year ago

A solution contains [Ba2+] = 5.0 × 10−5 M, [Zn2+] = 2.0 × 10−7 M, and [Ag+] = 3.0 × 10−5 M. Sodium oxalate (Na2C2O4) is slowly a

Jet001 [13]

Answer:

BaC₂O₄, then ZnC₂O₄, then Ag₂C₂O₄

Explanation:

1. Calculate the equilibrium concentrations of oxalate ion

Let [C₂O₄²⁻] = c

(a) Barium oxalate

BaC₂O₄ ⇌ Ba²⁺ + C₂O₄²⁻

E/mol·L⁻¹: 5.0 × 10⁻⁵ c

Ksp = [Ba²⁺][C₂O₄²⁻] = 5.0 × 10⁻⁵c = 1.5 × 10⁻⁸

c = (1.5 × 10⁻⁸)/(5.0 × 10⁻⁵) = 3.0 × 10⁻⁴ mol·L⁻¹

(b) Zinc oxalate

ZnC₂O₄ ⇌ Zn²⁺ + C₂O₄²⁻

E/mol·L⁻¹: 2.0 × 10⁻⁷ c

Ksp = [Zn²⁺][C₂O₄²⁻] = 2.0 × 10⁻⁷c = 1.35 × 10⁻⁹

c = (1.35 × 10⁻⁹)/(2.0 × 10⁻⁷) = 6.8 × 10⁻³ mol·L⁻¹

(c) Silver oxalate

Ag₂C₂O₄ ⇌ 2Ag⁺ + C₂O₄²⁻

E/mol·L⁻¹: 3.0 × 10⁻⁵ c

Ksp = [Ag⁺]²[C₂O₄²⁻] = (3.0× 10⁻⁵)²c = 9.0 × 10⁻¹⁰c = 1.1 × 10⁻¹¹

c = (1.1 × 10⁻¹¹)/(9.0 × 10⁻¹⁰) = 0.012 mol·L⁻¹

2. Decide the order of precipitation

BaC₂O₄ will precipitate when c > 3.0 × 10⁻⁴ mol·L⁻¹

ZnC₂O₄ will precipitate when c > 6.8 × 10⁻³ mol·L⁻¹

Ag₂C₂O₄ will precipitate when c > 0.028 mol·L⁻¹

This happens to be the order of increasing concentration of oxalate ion.

The order of precipitation is

BaC₂O₄, then ZnC₂O₄, then Ag₂C₂O₄

4 0

3 years ago