2 years ago

Is FeS iron (ll) sulfide or iron (lll) sulfide?

Chemistry

1 answer:

Amiraneli [1.4K]2 years ago

4 0

Answer:

the valence of S is -2. For FeS to be neutral the valence of Fe used must be +2

and since Iron (II) has its valency 2, FeS will be Iron (II) Sulfide.

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What 2 instruments are commonly used to measure air pressure?

levacccp [35]

<span>I think it is the barometer and aneroid barometer</span>

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2 years ago

A pan containing 40 grams of water was allowed to cool from a temperature of 91.0C. If the amount of heat repressed is 1,300 jou

Vinvika [58]

Answer:

83°C

Explanation:

The following were obtained from the question:

M = 40g

C = 4.2J/g°C

T1 = 91°C

T2 =?

Q = 1300J

Q = MCΔT

ΔT = Q/CM

ΔT = 1300/(4.2x40)

ΔT = 8°C

But ΔT = T1 — T2 (since the reaction involves cooling)

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Collect like terms

8 — 91 = —T2

— 83 = —T2

Multiply through by —1

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3 years ago

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Answer:

Land that gains weight can rise slowly.

Explanation:

7 0

2 years ago

How many kilojoules are equivalent to 10 joules?

miss Akunina [59]

1 Kj ------------- 1000 J
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3 years ago

Give the Unabbreviated electron configuration for barium

Shalnov [3]

Answer:

Ba: 1s² 2s²2p⁶ 3s²3p⁶ 4s²3d¹⁰4p⁶ 5s²4d¹⁰5p⁶ 6s²

Step-by-step explanation:

Step 1. Locate barium in the Periodic Table.

It's in Period 6, Group 2: Element 56 (highlighted blue in the Periodic Table below).

Step 2. Add 54 electrons to the energy levels

You add then in the order shown in the diagram below.

The complete electron configuration is:

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3 years ago