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3 years ago

Help pls quickly!!!!!

Chemistry

1 answer:

Svetradugi [14.3K]3 years ago

7 0

B is remaining the constant speed for 4 mins

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When a kettle is placed on the stove and water begins to boil, the hotter water at the bottom begins to rise and the

My name is Ann [436]

Answer:

The cooler water is denser

Explanation:

Convection drives the boiling of water placed on a stove in a kettle.

During convection, heat is circulated by density differences in portions of a fluid.

Convection is a form of heat transfer in fluids especially gas and liquid.

In boiling water, the heat is supplied to the base of the stove.
The water at the bottom on heat becomes lighter as the molecules gain more kinetic energy.
The colder part of the water on top sinks to replace the less dense on below.
This exchange sets up convection cells in the kettle.

3 0

2 years ago

Read 2 more answers

WHY is there a difference between how an electrolytes and non electrolytes affect collegiative properties?

natulia [17]

<span>Colligative properties are dependent upon the number of molecules or ions present in solution. Therefore, 1 mole of Na2SO4 will produce 3 moles of ions and so it will have 3 times as much of an effect as 1 mole of sugar, which is not an electrolyte and can't dissociate to an appreciable extent.</span>

4 0

3 years ago

Which of the following molecules has a bent shape?

poizon [28]

A, because the shape of it forms and arc much like a H2O molecule.

4 0

2 years ago

Using the appropriate starting material, (1) show the synthetic steps of the modified Kiliani-Fischer chain extension synthesis

sashaice [31]

Answer:............

Explanation:

Download doc

3 0

3 years ago

(CO2) (O2) (He) (N2) (CH4) (Imagine these are balloons with the specified gas inside)

valentina_108 [34]

Answer:

Highest speed: He

Lowest speed: CO2

Explanation:

The rms speed (average speed) of the molecules/atoms in an ideal gas is given by:

$v=\sqrt{\frac{3RT}{M}}$

where

R is the gas constant

T is the absolute temperature of the gas

M is the molar mass of the gas, which is the mass of the gas per unit mole

From the equation, we see that at equal temperatures, the speed of the molecules in the gas is inversely proportional to the molar mass: the higher the molar mass, the lower the speed, and vice-versa.

In this problem, we have 5 gases:

(CO2) (O2) (He) (N2) (CH4)

Their molar mass is:

CO2: 44 g/mol

O2: 16 g/mol

He: 4 g/mol

N2: 14 g/mol

CH4: 16 g/mol

The gas with lowest molar mass is Helium (He): therefore, this is the gas with greatest average speed.

The gas with highest molar mass is CO2: therefore, this is the gas with lowest average speed.

8 0

3 years ago