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3 years ago

If a mass of a cube were 48.0g and its volume 24.0 cm3 what would its density be

Chemistry

1 answer:

EastWind [94]3 years ago

5 0

Answer:

<h3>The answer is 2 g/cm³</h3>

Explanation:

The density of a substance can be found by using the formula

$density = \frac{mass}{volume} \\$

From the question

mass = 48 g

volume = 24 cm³

We have

$density = \frac{48}{24} \\$

We have the final answer as

Hope this helps you

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If the kb of a weak base is 1.1 × 10-6 m, what is the ph of a 0.49 m solution of this base?

Elden [556K]

When Kb = 1.1 x 10^-6

∴ Ka = Kw / Kb

= 1.1 x 10^-14 / (1.1 x 10 ^-6)

= 1 x 10^-8

when the reaction equation when we assume the base is B

B + H2O ↔ BH+ + OH-

∴ Ka = [BH+][OH-]/[B]

1 x 10^-8 = X^2 / 0.49

X^2 = 4.9 x 10^-9

∴X = 7 x 10^-5

∴[OH-] = 7 x 10^-5

∴POH = -㏒[OH]

= -㏒7 x 10^-5

= 4.15

∴ PH = 14 - POH

14 - 4.15

= 9.85

8 0

3 years ago

Determine the oxidation number of<br>Sulphur in Sodium thiosulphate

Semenov [28]

The oxidation number of Sulphur = +2

<h3>Further explanation</h3>

General formula for determining Oxidation Numbers :

1. The number of oxidation of single element atoms = 0. Examples of Ar, Mg, Cu, Fe, N₂, O₂, etc. = 0

Group I : +1

Group II : +2

H in compound = +1, except metal hydride compounds (Hydrogen which binds I or II groups) oxidation number H = -1, for example, LiH, MgH₂, etc.

2. Oxidation number O in compound = -2, except OF2 = + 2 and in peroxide (Na₂O₂, BaO₂) = -1 and superoxide, for example KO₂ = -1/2.

3 The oxidation number in a non-filled compound = 0,

The total amount of oxidation in ion = ion charge, Example NO₃⁻ = -1

Sodium thiosulphate - Na₂S₂O₃

Oxidation number Na = +1 ⇒x2 = +2

Oxidation number O = -2 ⇒x3 = -6

Oxidation number Na₂S₂O₃ = 0

2.Na+2.S+3.O=0

2.+1+2.S+3.(-2)=0

2+2S-6=0

-4+2S=0

2S=4

S=+2

4 0

3 years ago

Can a diagram show both qualitative and quantitative data at the same time? Use

worty [1.4K]

Answer:

Results cannot be generalized. Looking at this table, it can be hard to see how the two types of data can be combined. Indeed, while they are fundamentally different quantitative and qualitative data share an important relationship with one another and, when integrated properly, can make each other more useful.

Explanation:

Hope this helps!

3 0

3 years ago

What is the pressure of a sample of gas at a volume of .335 L if it occupies 1700 mL at 850 mm Hg?

dangina [55]

Answer:

Pressure = 4313.43mmHg

Explanation:

P1 = ?

V1 = 0.335L

V2 = 1700mL =1700*10^-3L = 1.7L

P2 = 850mmhg

From Boyle's law, the volume of a fixed mass of gas is inversely proportional to its pressure provided that temperature remains constant.

P = k / v

K = pv. P1V1 = P2V2 = P3V3 =........=PnVn

P1V1 = P2V2

Solve for P1,

P1 = (P2*V2) / V1

P1 = (850 * 1.7) / 0.335

P1 = 4313.43mmHg

The pressure of the gas was 4313.43mmHg

7 0

3 years ago

!Please help! Will give brainliest to correct answer!!

pychu [463]

Answer:

An alcohol thermometer can easily measure the boiling point of a colorless liquid that boils at 100 °C.

A mercury thermometer can easily measure the boiling point of a colorless liquid that boils at 82 °C.

A mercury thermometer can easily measure the freezing point of a colorless liquid that freezes at −50 °C.

or An alcohol thermometer can easily measure the freezing point of a colorless liquid that freezes at −110 °C.

Explanation:

hope it help's ♡´･ᴗ･`♡

7 0

3 years ago

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