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3 years ago

Which of the following is an indication of a chemical reaction?

Chemistry

1 answer:

Salsk061 [2.6K]3 years ago

8 0

Answer:

Explanation:

A chemical reaction is usually accompanied by easily observed physical effects, such as the emission of heat and light, the formation of a precipitate, the evolution of gas, or a color change.

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How does temperature relate to density? A- As temperature increases density increases. B- As temperature decreases density decre

SVEN [57.7K]

Answer:

The answer is c

Explanation:

8 0

2 years ago

Determine the vapor pressure (atm) of rubbing alcohol (isopropanol) at 20.0 °C. The normal boiling point of isopropanol is 82.3

jeyben [28]

Here we apply the Clausius-Clapeyron equation:
ln(P₁/P₂) = ΔH/R x (1/T₂ - 1/T₁)

The normal vapor pressure is 4.24 kPa (P₁)
The boiling point at this pressure is 293 K (P₂)
The heat of vaporization is 39.9 kJ/mol (ΔH)
We need to find the vapor pressure (P₂) at the given temperature 355.3 K (T₂)

ln(4.24/P₂) = 39.9/0.008314 x (1/355.3 - 1/293)
P₂ = 101.2 kPa

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3 years ago

HELP ME!!ILL GIVE U BRAINLIESTT!!!!!

Elodia [21]

It’s the nerves but I’m not 100% sure if I’m correct

6 0

3 years ago

`Silver salts have antimicrobial properties--they can kill bacteria by interfering with certain proteins. Silver nitrate used to

Lostsunrise [7]

Answer:

3.6 × 10²⁴ atoms of O

Explanation:

Let's consider the molecular formula of silver nitrate: AgNO₃.

We can establish the following relations:

1 mol of AgNO₃ has 6.02 × 10²³ molecules of AgNO₃ (Avogadro's number).
1 molecule of AgNO₃ has 3 atoms of oxygen.

The atoms of oxygen in 2.0 moles of silver nitrate are:

$2.0molAgNO_{3}.\frac{6.02\times10^{23}moleculeAgNO_{3} }{1molAgNO_{3}} .\frac{3atomO}{1moleculeAgNO_{3}} =3.6\times10^{24}atomO$

3 0

3 years ago

Help help like rn pls!!!!

Dominik [7]

Answer:

1.T

2.T

3.T

4.F

5.F

6.T

7.T

8.F

9.T

10.T

11.F

12.S

13.T

maaf kalo salah

7 0

3 years ago