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Setler [38]
3 years ago
6

Imagine that small pieces of the metals copper, magnesium and iron are placed in three test tubes labeled A, B, and C, respectiv

ely. If enough aqueous HCl is added to each tube to completely submerge the metal pieces, predict the products that will form in each test tube.
Chemistry
1 answer:
Marizza181 [45]3 years ago
8 0
A) Cu

Cu + 2HCl --> CuCl2 + H2(g)

Products predicted: Copper(II) choloride and hydrogen gas


B) Mg

Mg + 2HCl --> MgCl2 + H2

Products predicted: magnesium chloride + hygrogen gas

C) Fe

Fe +2 HCl -> FeCl2 + H2, or
2Fe +6 HCl -> 2FeCl3 + 3H2

Products predicted: Iron(II) chloride, iron (III) chloride and hydrogen gas.

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Nitella [24]

Answer:

Gill's

Explanation:

Fish's have many characteristics that differ from humans, and one of them is the gills.

3 0
3 years ago
) How many moles are there in 2.00 x 10^19 molecules of calcium phosphate?
Tamiku [17]

Answer:

\huge 3.322 \times  {10}^{ - 5}  \:  \: moles  \\

Explanation:

To find the number of moles in a substance given it's number of entities we use the formula

n =  \frac{N}{L} \\

where n is the number of moles

N is the number of entities

L is the Avogadro's constant which is

6.02 × 10²³ entities

From the question we have

n =  \frac{2.00 \times  {10}^{19} }{6.02 \times  {10}^{23} }  \\  \\  = 3.322 \times  {10}^{ - 5}  \:  \: moles

Hope this helps you

4 0
2 years ago
If the change of enthalpy of this reaction when proceeding left to right is +14 kcal, which chemical equation is correct?
bagirrra123 [75]

Answer:

N₂O₄ + 14 kcal ⇄ 2NO₂.

Explanation:

Since the sign of ΔH determines either the reaction is exothermic or endothermic:

+ve, the reaction is endothermic.

-ve, the reaction is exothermic.

∵ The change of enthalpy of this reaction when proceeding left to right is + 14 kcal (+ ve sign).

∴ The reaction is endothermic, the heat is a part of the reacatnts in the reaction.

So, the reaction is:

N₂O₄ + 14 kcal ⇄ 2NO₂.

7 0
3 years ago
Is gold a compound or an element
timurjin [86]
Gold is an element (Au) you can identify it on a periodic table
3 0
3 years ago
Convert 150 g/L to the unit g/mL.
inn [45]
The correct answer is C 0.15 g/mL.
4 0
3 years ago
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