All categories

3 years ago

Which of the following is an example of heat transfer by conduction?

2 answers:

6 0

Conduction is when heat is transfered because surfaces are touching
convection is transfer through a fluid or gas like water or air

A is convection
B is when you touch the match, conduction
C is convection
D. you aren't touching the fire so convection

B is answer

N76 [4]3 years ago

4 0

C is the answer to the question

You might be interested in

Cryolite (Na3AlF6) is used in the production of aluminum from its ores. It is made by the reaction 6 NaOH 1 Al2O3 1 12 HF 8n 2 N

kap26 [50]

<u>Answer:</u> The mass of cryolite produced in the reaction is 1181.8 g

<u>Explanation:</u>

To calculate the number of moles, we use the equation:

$\text{Number of moles}=\frac{\text{Given mass}}{\text{Molar mass}}$ .....(1)

Given mass of aluminium oxide = 287 g

Molar mass of aluminium oxide = 102 g/mol

Putting values in equation 1, we get:

$\text{Moles of aluminium oxide}=\frac{287g}{102g/mol}=2.814mol$

The given chemical reaction follows:

$6NaOH+Al_2O_3+12HF\rightarrow 2Na_3AlF_6+9H_2O$

By Stoichiometry of the reaction:

1 mole of aluminium oxide produces 2 moles of cryolite

So, 2.814 moles of aluminium oxide will produce = $\frac{2}{1}\times 2.814=5.628mol$ of cryolite

Now, calculating the mass of cryolite by using equation 1:

Moles of cryolite = 5.628 moles

Molar mass of cryolite = 210 g/mol

Putting values in equation 1, we get:

$5.628mol=\frac{\text{Mass of cryolite}}{210g/mol}\\\\\text{Mass of cryolite}=(5.628mol\times 210g/mol)=1181.8g$

Hence, the mass of cryolite produced in the reaction is 1181.8 g

5 0

3 years ago

Can someone helps me

Lorico [155]

Answer:

Letter C is the correct one

6 0

3 years ago

____ ha no nucleus.

Serga [27]

I think its prokaryotes?

7 0

3 years ago

Read 2 more answers

Match each processes with the correct transfer of energy.

Gnesinka [82]

The processes that experience energy loss included the following: FREEZING, CONDENSATION AND DEPOSITION.
Energy loss occurs in these processes because the kinetic energy of the particles decreases as a result of the change in state that they undergo. For instance, for the process of freezing, a substance has to change from the liquid state to the solid state. The amount of kinetic energy that is available to the particles of the liquid is more than that of the solid, thus, the particles are losing some kinetic energy.
The processes that experience energy gains are: SUBLIMATION, EVAPORATION AND MELTING. These processes move from a state of lower kinetic energy to that of higher kinetic energy.

6 0

4 years ago

Why is nitro group called an ambident group?

IrinaK [193]

Answer:

An ambident ("both teeth") group is a group that can attach to another by either of two atoms. A nitro group can bond through either N or O. In organic chemistry, this property gives rise to functional group isomers.

Explanation:

4 0

3 years ago

Read 2 more answers