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navik [9.2K]
4 years ago
5

Marcie is hiking in the mountains and she discovers an interesting shiny rock.As she picks it up she wonders whether it could be

a mineral or whether it's just a rock. She notes that it is solid and naturally occurring with a definite chemical composition, but that it has no definite crystal structure
Chemistry
1 answer:
pogonyaev4 years ago
3 0

Answer:

Marcie pick up a rock

Explanation:

A rock is a natural occuring no living thing that has a definite structure from the physical characteristics Marcie saw in the rock she picked it tends to rock because unlike minerals rocks has definite structure.

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-<br> Which image shows in nonrenewable resource?
laiz [17]

Answer:

It is the stove

Explanation: I know because I learned this last year

3 0
2 years ago
For the following galvanic cell, represented in line notation, determine what balanced half-reactions occur at each electrode. (
Alex787 [66]

Answer:

Anode (oxidation): Cr(s) ⇒ Cr³⁺(aq) + 3 e⁻

Cathode (reduction): Ag⁺(aq) + 1 e⁻ ⇒ Ag(s)

Explanation:

Let's consider the notation of a galvanic cell.

Cr(s) | Cr³⁺(aq) || Ag⁺(aq) | Ag(s)

On the left, it is represented the anode (oxidation) and on the right, it is represented the cathode (reduction).

The half-reactions are:

Anode (oxidation): Cr(s) ⇒ Cr³⁺(aq) + 3 e⁻

Cathode (reduction): Ag⁺(aq) + 1 e⁻ ⇒ Ag(s)

To have the global reaction, we have to multiply the reduction by 3 (so the number of electrons gained and lost are the same) and add both half-reactions.

Global reaction: Cr(s) + 3 Ag⁺(aq) ⇒ Cr³⁺(aq) + 3 Ag(s)

6 0
3 years ago
When a chemist titrates a standard solution of 168.61 mL of hydrochloric acid (HCl) with 0.104 M sodium hydroxide (NaOH) , she f
ch4aika [34]
The conc of NaOH is 0.104M which means that 1000mL solution contains 0.104mol of NaOH, so the amount of moles used in the titration will be
\frac{0.104mol}{1000mL} * 259.4mL = 4.00* 10^{-7} mol
The reaction of NaOH and HCl is one to one so the moles of HCl that were titrated will also be 4.00* 10^{-7} mol
The Molarity is therefore
\frac{4.00* 10^{-7} mol}{168.61 mL} * 1000mL = 2.38* 10^{-6} M
4 0
3 years ago
Using the molecular weight (258 g/mol) determine the amount of mmol of (3S)-2,2,- dibromo-3,4-dimethylpentane required.
Varvara68 [4.7K]

The question is incomplete, the complete question is;

With all of this data in hand, we can now set up our reaction. To begin we are going to use 0.7 g of (35)-2.2-dibromo-3,4-dimethylpentane. Question #7: Using the molecular weight (258 g/mol) determine the amount of mmol of (3S)-2,2,- dibromo-3,4-dimethylpentane required. Round to the tenths place

Answer:

2.70 mmols

Explanation:

Given that;

Mass of (3S)-2,2,- dibromo-3,4-dimethylpentane = 0.7 g

Molar mass of (3S)-2,2,- dibromo-3,4-dimethylpentane = 258 g/mol

From,

Number of moles = mass/molar mass

Number of moles of (3S)-2,2,- dibromo-3,4-dimethylpentane = 0.7g/258 g/mol = 2.7 ×10^-3 moles

Therefore;

Number of moles of (3S)-2,2,- dibromo-3,4-dimethylpentane = 2.70 mmols

8 0
4 years ago
Someone pls help me I will make you brain
I am Lyosha [343]

Answer:

i think b or c

Explanation:

one of the 2. (btw i use flvs to so i dont blame u for being confused)

5 0
2 years ago
Read 2 more answers
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