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NNADVOKAT [17]
2 years ago
6

Which of the following properly lists the metals in order from decreasing to increasing ease of oxidation?

Chemistry
2 answers:
Sloan [31]2 years ago
6 0
I know it is either B or D, since I know that K will oxidize in water, and Ag will have a tougher time oxidizing.  I am going to lean towards D for my answer.
lora16 [44]2 years ago
6 0

Answer is: D. Ag < Cu < Cr < K.

Reactivity series is an empirical progression of a series of metals, arranged by their reactivity from highest to lowest (alkaline metals have highest reactivity and Noble metals lowest reactivity):

K > Ba > Sr > Na > Ca > Mg > Be > Al > Mn > Zn > Cr> Fe > Cd > Co > Ni > Sn > Pb > H(in acids) > Cu > Hg > Ag.

Metal higher in the reactivity series will displace another and it will be oxidized.

For example, potassium is more reactive than silver.

Chemical reaction: K + AgCl → KCl + Ag.

Potassium is oxidized (from oxidation number 0 to +1) and silver is reduced (from oxidation number +1 to 0).

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Which feature of four different marine fossils makes the fossil organism most similar to the present-day organism with four limb
zvonat [6]
I found the rest of the exercise on the internet and these are the options.
"-Undifferentiated vertebrae throughout the body.
-One neck vertebra allowing up and down movement.
-Many neck vertebrae that allow for greater mobility.
<span>-Two neck vertebrae allowing up and down and sideways movement."

The correct answer would be the third. - "</span>Many neck vertebrae that allow for greater mobility." The <span>present-day organism with four limbs has a neck with several vertebrae that allow movements of rotation (mostly because of only two vertebrae at the top of the neck), and side way movements, as well as back and forth movements.</span>
6 0
3 years ago
How many atoms are in 45.22 moles of strontium​
AleksandrR [38]

Answer:

272.31× 10²³ atom of strontium

Explanation:

Given data:

Number of moles of strontium = 45.22 mol

Number of atoms = ?

Solution:

The given problem will solve by using Avogadro number.

It is the number of atoms , ions and molecules in one gram atom of element, one gram molecules of compound and one gram ions of a substance.  The number 6.022 × 10²³ is called Avogadro number.

1 mole = 6.022 × 10²³ atoms

45.22 mol × 6.022 × 10²³ atom / 1 mol

272.31× 10²³ atom

7 0
2 years ago
1. At room temperature, air is usually a (solid, liquid, gas).​
kirza4 [7]
At room temperature the air is Gas
3 0
2 years ago
The entropy of an exothermic reaction decreases. This reaction will be spontaneous under which of the following temperatures?
kakasveta [241]

Answer:Low temperatures

Explanation:

∆G= ∆H-T∆S

If ∆H is negative (exothermic reaction), then in order to maintain ∆G<0 which is the condition for spontaneity; T must decrease. This is because, decrease in T will keep the difference of ∆H and T∆S at a negative value in order to satisfy the above stated condition for spontaneity.

3 0
3 years ago
Read 2 more answers
PLEASE ANSWER IM ON A TIME LIMIT PLEASEEEE: Comparative investigations: collecting data for blank
jarptica [38.1K]

Observation, I think

6 0
2 years ago
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