Atoms: SC.8.P.8.7

What is the volume, in liters, of 0.500 mol of CzHg gas at STP?

Svetlanka [38]

Answer:

C.) 11.2 L

Explanation:

8 0

3 years ago

Explain why a fluorescent light bulb is not as hot as an incandescent light bulb.

Jet001 [13]

An incandescent bulb becomes hotter than a fluorescent bulb when turned on because in a regular incandescent bulb, there is tungsten wire where electricity is converts into heat. A regular incandescent light bulb requires 4 times more energy than a fluorescent bulb in order to produce the same amount of light. The conversion is such that for a 75-watt bulb, temperature get raised to approximately 2000 K. For such a high temperature, the radiating energy from the wire have some visible light. In such bulbs, 90% of the electricity get consumed in producing heat and only 10% produces light thus, they are not much efficient source of light.

On the other hand, fluorescent bulbs produce light with less amount of heat. In them, 40% of electricity is consumed in producing light and 60% in heat which is very less as compared to heat produced by a incandescent bulb. This is because when it get turned on, mercury atoms inside the bulb collides with electrons and produce UV light which is then converted into visible light using thin layer of phosphor power present inside the bulb. This produces low amount of heat thus, the bulb stays cooler, the bigger size of bulb also helps in dispersing heat.

Therefore, a fluorescent light bulb is not as hot as an incandescent light bulb.

5 0

3 years ago

Read 2 more answers

A flexible container is put in a deep freeze. Its original volume is 3.00 m3 at 25.0°C. After the container cools, it has shrunk

makvit [3.9K]

The correct answer is 37.5

5 0

3 years ago

Read 2 more answers

What is the volume (in cubic inches) of 3.8 lb of titanium?

makkiz [27]

Given the mass of Titanium = 3.8 lb

Density of Titanium is 4.506 $\frac{g}{cm^{3} }$

We can calculate the volume of Titanium using density and mass.

Converting mass from lb to g:

$3.8lb *\frac{453.6 g}{1 lb} = 1724 g$

Calculating the volume of Titanium using density and mass:

$1724 g * \frac{cm^{3} }{4.506g} =382.6 cm^{3}$

Converting volume from $cm^{3} to in^{3}$ :

$382.6 cm^{3} * \frac{ 1 in^{3} }{16.39cm^{3} } = 23.34 in^{3}$

7 0

4 years ago

An oxide of nitrogen contains 30.45 mass % N.

N76 [4]

An oxide of nitrogen contains 30.45 mass % N, if the molar mass is 90± 5 g/mol the molecular formula is N₂O₄.

<h3>What is molar mass?</h3>

The molar mass of a chemical compound is determined by dividing its mass by the quantity of that compound, expressed as the number of moles in the sample, measured in moles. A substance's molar mass is one of its properties. The compound's molar mass is an average over numerous samples, which frequently have different masses because of isotopes.

<h3>How to find the molecular formula?</h3>

The whole-number multiple is defined as follows.

Whole-number multiple = $\frac{molar mass (g/mol)}{empirical formula mass (g/mol)}$

The empirical formula mass is shown below.

Mw of empirical formula = Mw of N+ 2 x (Mw of O)

= 14.01 g/mol + 2 x (16.00 g/mol)

= 46.01 g/mol

With the given molar mass or the molecular formula mass, we can get the whole-number multiple for the compound.

Whole-number multiple = $\frac{90 g/mol }{46.01 g/mol}$ ≈ 2

Multiplying the subscripts of NO2 by 2, the molecular formula is N(1x2)O(2x2)= N2O4.

To learn more about molar mass visit:

brainly.com/question/12127540

#SPJ4

5 0

2 years ago