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3 years ago

Which element is located in group 2 period 2 on the periodic Table?

Chemistry

2 answers:

AnnZ [28]3 years ago

4 0

Answer:

Berilium is located in period 2 group2

Explanation:

you are welcome

irga5000 [103]3 years ago

4 0

Answer:

Berylium

Explanation:

it has two valence electrons in its outermost shell which makes it belong to the GROUP 2. It's atomic number is 004 which makes its electrons occupy up till the second shell only, this, making it belong to the PERIOD 2.

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A 0.532 mol sample of SO2 gas requires 52.3 s to effuse through a tiny hole. Under the same conditions, how long will it take 0.

scoundrel [369]

Answer:

41.3 s

Explanation:

Let t₁ represent the time taken for SO₂ to effuse.

Let t₂ represent the time taken for Ar to effuse.

Let M₁ represent the molar mass of SO₂

Let M₂ represent the molar mass of Ar

From the question given above,

Time taken (t₁) for SO₂ = 52.3 s

Time taken (t₂) for Ar =?

Molar mass (M₁) of SO₂ = 32 + (16×2) = 32 + 32 = 64 g/mol

Molar mass (M₂) of Ar = 40 g/mol

Finally, we shall determine the time taken for Ar to effuse by using the Graham's law equation as shown below:

t₂ / t₁ = √(M₂ / M₁)

t₂ / 52.3 = √(40 / 64)

t₂ / 52.3 = √0.625

t₂ / 52.3 = 0.79

Cross multiply

t₂ = 52.3 × 0.79

t₂ = 41.3 s

Thus, the time taken for the amount of Ar to effuse is 41.3 s

3 0

3 years ago

Lauryl alcohol is a nonelectrolyte obtained from coconut oil and is used to make detergents. A solution of 8.80 g of lauryl alco

kipiarov [429]

Answer:

The molar mass of lauryl alcohol is approximately 180 g/mol

Explanation:

Step 1: Data given

Mass of lauryl alcohol = 8.80 grams

Mass of benzene = 0.100 kg = 100 grams

Freezing point of Benzene is 5.5 °C

Kf value for benzene = 5.12 °C/molal

Step 2: Calculate the freezing point depression

ΔTf = 5.5 - 3.0 °C = 2.5 °C

Step 3: Calculate molality

⇒ with ΔTf = the freezing point depression = 2.5 °C

⇒ with i = the van't Hoff factor = 1

⇒ with kf = the free point depression constat pf benzene = 5.12°C/m

⇒ with m =the molality = TO BE DETERMINED

molality = ΔTf / kf

molality = 2.5 °C / 5.12 °C /m

molality = 0.488 molal

Step 4: Calculate moles lauryl alcohol

Molality = moles lauryl alcohol / mass benzene

Moles lauryl alcohol = molality * mass benzene

Moles lauryl alcohol = 0.488 m * 0.100 kg

Moles lauryl alcohol = 0.0488 moles

Step 5: Calculate molar mass of lauryl alcohol

Molar mass lauryl alcohol = mass lauryl alcohol/ moles lauryl alcohol

Molar mass lauryl alcohol = 8.80 grams / 0.0488 moles

Molar mass lauryl alcohol = 180 g/mol

The molar mass of lauryl alcohol is approximately 180 g/mol

3 0

3 years ago

How does an atom-88 become a strontium ion with a +2 charge?

Fantom [35]

Strontium atom loses 2 electrons to become an ion with 2 electrons lesser than its atom. Your answer is C.

6 0

3 years ago

The density of seawater is 1.025 g/ml what is the mass of 100,000 ml of seawater in grams

melamori03 [73]

D = m / V

1.025 = m / 100,000 mL

m = 1.025 x 100,000

m = 102,500 g

8 0

3 years ago

In Nuclear chemistry, the key requirement for a chain reaction is that...a. each event must produce more than one particle capab

ahrayia [7]

Cccccccccccccccccccccccc

5 0

3 years ago