All categories

3 years ago

If you quickly plunge a room-temperature mercury thermometer into very hot water, what will happen to the mercury level?\

Chemistry

1 answer:

jeka57 [31]3 years ago

3 0

The answer is; The mercury level first falls then begin to rise rapidly.

This is because even though glass is not a good thermal conductor, the great heat variation causes the glass to gather heat and expand first even before the mercury is reached by the heat. This increases the volume of the lumen of the glass hence causing the mercury level to drop as the volume of the glass increases.

however, as the heat reaches the mercury, it also begins to expand and the levels stop falling and begin to rise.

You might be interested in

Crude oil is a liquid kind of___________<br><br> what is the answer?

Fantom [35]

<h2>What kind of liquid is crude oil?</h2>

<h3>First, let's get to know what is crude oil.</h3>

crude oil is a naturally occuring petroleum product composed of hydrocarbon deposits and other organic materials. A type of fossil fuel, crude oil is refined to produce usable products including gasoline, diesel, and various other forms of petrochemicals.

<h3>What kind of liquid is crude oil?</h3>

crude oil is a mixture of comparatively volatile liquid hydrocarbons (compounds composed mainly of hydrogen and carbon), though it also contains some nitrogen, sulfur, and oxygen. those elements form a large variety of complex molecular structures, some of which can be readily identified. regardless of variations, however, almost all crude oil ranges from 82 to 87 carbon by weight and 12 to 15 hydrogen by weight.

<h2>What are the uses of crude oil?</h2>

<h3>crude oil has many uses as </h3><h3>the following:</h3>

plastics. plastics requires crude oil for it's production.
clothing materials like T-shirt, and Short pants.
products in your home like furnitures, and kitchenware.
transportation
get high-quality bulk fuels from Kendrick oil.

<h2>so now you know the uses and importance of </h2><h2>crude oil.</h2>

#let's study

5 0

3 years ago

Two atoms with an electronegativity difference of 0.4 form a bond that is_____

Yakvenalex [24]

Answer:

B) Covalent, because electrons are shared.

6 0

3 years ago

Use your understanding of the ideal gas law to identify the correct relationships among the variables. Pressure is . Temperature

MAXImum [283]

Answer:

Pressure is inversely proportional to the volume of a gas at constant temperature and number of moles

Temperature is directly proportional to volume at constant pressure and number of moles

Volume is directly proportional to the number of moles of a gas at constant temperature and pressure

Explanation:

The ideal gas law is derived from a combination of the Boyle's, Charles' and Avogadro's law of gases.

Boyle's law states that at constant temperature, the volume of a given mass of gas (number of moles of gas is constant) is inversely proportional to the pressure exerted by the gas.

V ∝ 1/P (at constant n, T)

Charles'law states that at constant pressure, the volume of a given mass of gas (constant amount, n) is directly proportional to the temperature of the gas; V ∝ T (at constant n, P)

Avogadro’s law states that at constant temperature and pressure, the volume of a given mass of gas is directly proportional to the number of moles of gas present; V ∝ n(at constant T, P)

Combining the three equations gives the following relationship: V ∝ nT/P

By inserting a proportionality constant called the molar gas constant, R, in the relationship above, the ideal gas equation is derived as follows:

V = nRT/P or PV = nRT

5 0

3 years ago

Read 2 more answers

A lightbulb filled with argon gas has a volume of 75 mL at STP. How many moles of argon gas does the lightbulb contain?

Elan Coil [88]

Answer:

0.00335 moles

Explanation:

From the question, Using

PV = nRT................... Equation 1

Where P = pressure, V = Volume, n = number of moles of argon gas, R = Molar gas constant, T = Temperature.

make n the subject of the equation

n = PV/RT............... Equation 2

Given: P = 1 atm (standard pressure), T = 273 K (standard temperature), V = 75 mL = 0.075 dm³

Constant: R = 0.082 atm·dm³/K·mol

Substitute into equation 2

n = (1×0.075)/(273×0.082)

n = 0.075/22.386

n = 0.00335 moles

4 0

3 years ago

What is the expected freezing point of a 0.50 m solution of na2so4 in water kf for water is 1.86°c/m?

Anna007 [38]

Colligative properties calculations are used for this type of problem. Calculations are as follows:<span>

ΔT(freezing point) = (Kf)m
ΔT(freezing point) = 1.86 °C kg / mol (0.50 mol/kg)
ΔT(freezing point) = 0.93 °C
Tf - T = 0.93 °C
<span>T = -0.93 °C</span></span>

4 0

3 years ago

Read 2 more answers