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mina [271]
3 years ago
7

Which of the following is not an example of a pure element?

Chemistry
2 answers:
motikmotik3 years ago
8 0
Copper wire is not an example of a pure element because although it's made by pure elements, it's not one itself. It's made by factories.

Have a nice day! :)
Pavlova-9 [17]3 years ago
8 0
B) O2

hopefully that helps lol if u have any more questions like that do be afaid to ask me




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Bingel [31]

Answer: vv

Explanation:

8 0
2 years ago
What is true about empathy?
uysha [10]
I would go with B. Not everyone can learn this skill.
8 0
3 years ago
Which of the following metals will liberate hydrogen from dilute HCL? A. Ag B.Au C.Hg D.Sn​
ollegr [7]

Answer:

ag and au are sure not to react. but hg and sn might or might not

5 0
3 years ago
Calculate the pressure of the CO₂ (g) in the container at 425 K.
Elanso [62]

The pressure of the CO₂ = 0.995 atm

<h3>Further explanation</h3>

The complete question

<em>A student is doing experiments with CO2(g). Originally, a sample of gas is in a rigid container at 299K and 0.70 atm. The student increases the temperature of the CO2(g) in the container to 425K.</em>

<em>Calculate the pressure of the CO₂ (g) in the container at 425 K.</em>

<em />

<em />

Gay Lussac's Law

When the volume is not changed, the gas pressure is proportional to its absolute temperature

\tt \dfrac{P_1}{T_1}=\dfrac{P_2}{T_2}

P₁=0.7 atm

T₁=299 K

T₂=425 K

\tt P_2=\dfrac{P_1\times T_2}{T_1}\\\\P_2=\dfrac{0.7\times 425}{299}=0.995 `atm

<em />

6 0
3 years ago
A piece of neutral litmus paper turned red in some grapefruit juice.  What does this show about the grapefruit juice
Elodia [21]

Answer:

grapefruit juice is an acid

Explanation:

A piece of neutral litmus paper turned red in some grapefruit juice.  What does this show about the grapefruit juice

with litmus paper remember:

E     R          

S     E

ACID

BLUE

acids turn litmus red, bases turn it blue

all citrus fruits :llemons, lime, grapefruit, oranges, etc are called

CITRUS FRUITS because they contain citric acid

7 0
2 years ago
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