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givi [52]
2 years ago
13

report the elements half life. if we start with 100g of your element (platinum) how long will it take to have 6.26g?

Chemistry
1 answer:
pav-90 [236]2 years ago
5 0

Answer:

did u get the answer yet

Explanation:

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Why is water a polar molecule? ? Why is water a polar molecule? ? 4 following 6 answers 6 Report Abuse Are you sure you want to
anyanavicka [17]
In a covalent bond one atom can attract the shared electrons more strongly than the other atom can. Water or H2O has a covalent bond whose Oxygen atoms attract more electrons that its Hydrogen atom. Since electrons have a negative charge, the Oxygen atom has a partial negative charge and the Hydrogen atom has a partial positive charge. These partial charges are what make water a polar molecule.marrit <span>· 2 years ago</span>
5 0
3 years ago
How many milliliters of ammonium sulfate solution having a concentration of 0.218 M are needed to react completely with 62.6 ml
BartSMP [9]

Answer:

330 mL of (NH₄)₂SO₄ are needed

Explanation:

First of all, we determine the reaction:

(NH₄)₂SO₄  +  2NaOH →  2NH₃  +  2H₂O  +  Na₂SO₄

We determine the moles of base:

(First, we convert the volume from mL to L) → 62.6 mL . 1L/1000 mL = 0.0626L

Molarity . volume (L) = 2.31 mol/L . 0.0626 L = 0.144 moles

Ratio is 2:1. Therefore we make a rule of three:

2 moles of hydroxide react with 1 mol of sulfate

Then, 0.144 moles of NaOH must react with (0.144 .1) /2 = 0.072 moles

If we want to determine the volume → Moles / Molarity

0.072 mol / 0.218 mol/L = 0.330 L

We convert from L to mL → 0.330L . 1000 mL/1L = 330 mL

6 0
3 years ago
The form of heat transfer taking place in the crust of the earth would be ____
Anna [14]
The form of heat transfer taking place in the crust of the Earth would be Convection.
7 0
3 years ago
Read 2 more answers
The molecule shown is a
Pani-rosa [81]

c is the answer a benzene

8 0
4 years ago
Which of these correctly describes the energy that makes the carousel turn
Dmitrij [34]

Answer:

F

Explanation:

A carousel can be made to rotate using different sources of energy.  One may decide to use electric energy, manual effort, water energy or heat energy as in a candle carousel.

When the candle is lit, heat energy is supplied and warm air rises heating up the air near the carousel eventually causing it to start rotating.

Hence heat from the candle leads to a current of warm air that rises up, causing the carousel to start rotating.

8 0
3 years ago
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