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vladimir1956 [14]
3 years ago
5

Eriq, a chemist, is running tests with four unknown elements. He has found that they all bond the same way, so he knows that the

y are in the same group on the periodic table of elements. The table shows other properties that Eriq observed. A 4-column table with 4 rows titled properties of four unknown elements. The first column titled element number has entries 1, 2, 3, 4. The second column titled melting point has entries 266 K, 172 K, 387 K, 53 K. The third column titled boiling point has entries 332 K, 239 K, 457 K, 85 K. The fourth column titled phase at room temperature has entries liquid, gas, solid, gas. These four elements are most likely in group 15. 16. 17. 18.
Chemistry
2 answers:
Reil [10]3 years ago
4 0

Answer:

in group 17

Explanation:

just took the quiz

kicyunya [14]3 years ago
3 0

Answer:

its group 17.

Explanation:

i got 100% on the quiz

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what is the balanced equation when copper metal is placed in a solution when platnium ii chloride is placed. what is the equatio
koban [17]

Answer:

Cu~+~PtCl_2->Pt~+~CuCl_2

Explanation:

In this case, we can start with the <u>formula of Platinum (II) Chloride</u>. The cation is the atom at the left of the name (in this case Pt^+^2) and the anion is the atom at the right of the name (in this case Cl^-). With this in mind, the <u>formula would be</u> PtCl_2.

Now, if we used <u>metallic copper</u> we have to put in the reaction only the <u>copper atom symbol</u> Cu. So, we have as reagents:

Cu~+~PtCl_2->

The question now is: <u>What would be the products?</u> To answer this, we have to remember <u>"single displacement reactions"</u>. With a general reaction:

A~+~BC->AB~+~C

With this in mind, the reaction would be:

Cu~+~PtCl_2->Pt~+~CuCl_2

I hope it helps!

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kramer

Answer:

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Explanation:

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Calculate the energy provided by a slice of bread containing 2 g of protein, 1 g of fat, and 20 g of carbohydrate. record your a
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 the energy gained by proteins and carbohydrates differs from the energy gained by fats.
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mass of carbohydrates - 20 g 
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energy = 97 kcal
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Lapatulllka [165]

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Explanation:

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ludmilkaskok [199]

Answer:

Attached is the solution to the question

Explanation:

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