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3 years ago

Describe differences between conduction and convection give examples

Chemistry

1 answer:

nevsk [136]3 years ago

4 0

Explanation:

Both conduction and convection are both forms of heat transfer from one place to another.

In conduction, there must be contact between two bodies for the process to take place but in convection, the matter moves to transfer heat.
Conduction mostly occurs in solid substances whereas convection occurs mostly in fluids.
Heat transfer in conduction is quite slow compared to convection which is much faster.

Example of conduction is heating of iron pot when cooking

Example of convection is the refrigerating system.

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A substance is a liquid at room temperature and dissolves well in water. It also conducts electricity. What type of bonds does i

kolbaska11 [484]

Ionic, covalent, molecular

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3 years ago

What is the mass, in grams, of

DIA [1.3K]

Answer:

The answers to your question are below

Explanation:

a) 6.85×1020 H2O2 molecules

H2O2 MW = 32 + 2 = 34 g

34g -------------------- 6.023 x 10²³ molecules

x ------------------- 6.85 x 10 ²⁰

x = (6.85 x 10 ²⁰)(34)/ 6.023 x 10²³

x = 0.038 g

3.3×1022 SO2 molecules

MW SO2 = 32 + 32 = 64g

64 g -------------------- 6.023 x 10²³ molecules

x -------------------- 3.3×1022 SO2 molecules

x = (3.3×1022 SO2)(64) / 6.023 x 10²³

x = 3.51 g

5.5×1025 O3 molecules

MW = 16 x 3 = 48g

48 g ----------------- 6.023 x 10²³ molecules

x ------------------ 5.5×1025 O3 molecules

x = (5.5×1025 )(48) / 6.023 x 10²³

x = 4383 g

9.30×1019 CH4 molecules

MW = 12 + 4 = 16 g

16 g -------------------- 6.023 x 10²³ molecules

x -------------------- 9.30×1019 CH4 molecules

x = (9.30×1019)(16) / 6.023 x 10²³

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4 0

3 years ago

Why do you think the molarity relationship is so important to the chemist?

Oksana_A [137]

There are two big advantages of using molarity to express concentration. The first advantage is that it's easy and convenient to use because the solute may be measured in grams, converted into moles, and mixed with a volume.

The second advantage is that the sum of the molar concentrations is the total molar concentration. This permits calculations of density and ionic strength

5 0

3 years ago

Calculate the energy of a photon with a frequency of 9.78 x 1021 Hz.

Alex_Xolod [135]

Answer:

9.98538 kilohertz

Explanation:

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3 years ago

Given the following values of pKa, determine which is the weakest base of the answers listed. Acid pKa HClO2 1.95 HClO 7.54 HCOO

professor190 [17]

Answer:

HClO 7.54

Explanation:

Hypochlorous acid (HClO) is a weakest acid because the pKa value of Hypochlorous acid is very high among the options given in the activity. pKa is a method which is used in order to identify the strength of an acid. The higher the value of pKa of a liquid, lower the strength of an acid while lower the value of pKa of chemical, higher the strength of an acid. In the options, HClO2 is a strong acid due to high lower pKa value.

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4 years ago