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3 years ago

Which of these is a mixture?? A.) salad B.) potassium C.) water D.) sugar

2 answers:

8 0

Salad would be a mixture because it is not chemically combined, if needed you could physically take it apart. So your answer would be A.)

vladimir2022 [97]3 years ago

5 0

The answer would be salad

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34. Which statement describes what occurs in the

Rudik [331]

Answer:

3 Both mass and charge are conserved.

Explanation:

The equation of the reaction is;

Cu(s) + 2Ag+ (aq) → Cu2+ (aq) + 2Ag(s)

A redox reaction is an acronym for oxidation-reduction reaction. This refers to a reaction in which the oxidation number of one specie is increased while the oxidation number of the other specie is decreased.

This means that one specie looses electrons while the other specie gains electrons. Here, Cu(s) looses electrons while Ag+(aq) gains electrons from left to right in the reaction.

In a redox reaction, both mass and charge are conserved. This means that the total mass and charge on the reactants side is the same as the total mass and charge on the products side.

5 0

2 years ago

Wood is A)element B)compound C)mixture

Dvinal [7]

I believe it’s a COMPOUND

7 0

3 years ago

?cobalt has a density of 8.90 g. what volume would 17.8 g of Cobalt occupy?

Airida [17]

Answer:

Explanation:

Given parameters:

Density of cobalt = 8.9gcm⁻³

Mass of cobalt = 17.8g

Solution

Density can be defined as the mass per unit volume of a substance:

Density = $\frac{mass in g}{volume in cm^{3} }$

The unknown in the problem is Volume:

Volume = $\frac{mass}{Density}$

Volume = $\frac{17.8}{8.9}$ = 2cm³

5 0

3 years ago

What factors could have affected your results?

AleksandrR [38]

Answer:

See below

Step-by-step explanation:

heat gained by metal + heat lost by water = 0

m₁C₁ΔT₁ + m₂C₂ΔT₂ = 0

C₁ = -(m₂C₂ΔT₂)/(m₁ΔT₁)

The factors determining C₁ are

mass of water
temperature change of water (T_f - Ti)
mass of metal
temperature change of metal (T_f - Ti)

Any factor that makes the numerator higher or the denominator lower than what you thought, will give a calculated C₁ that is too high (and vice versa).

The major sources of uncertainty are probably in determining the temperatures, especially the initial and final temperatures of the metal. However, you will have to decide what the principal factors were in your experiment.

For example, did the metal have a chance to cool during the transfer to the calorimeter? How easy was it to determine the equilibrium temperature, etc?

Factors Affecting the Calculation of Specific Heat Capacity

Too Low Too high

Water Water

Mass less than thought Mass more than thought

Ti lower Ti higher

T_f higher T_f lower

Metal Metal

Mass more than thought Mass less than thought

Ti higher Ti lower

8 0

3 years ago

Volcano help! *I GIVE THANKS!*

Pani-rosa [81]

A volcanic eruption occurs when the pressure in a magma chamber becomes so great it is released like a valve. Magma is released through the volcano's cone in an eruption of lava rocks (bombs) and ash. A volcanic cone develops over centuries as flowing lava from the active volcano cools to form layers of rock.
Hope this works,
Ahawk

5 0

3 years ago