Ask question

Ask question

All categories

2 years ago

6

Which would be best categorized as heat transfer by convection?

2 answers:

Tasya [4]2 years ago

8 0

Answer:

B) Noodles rising and falling in a pot of boiling water

Explanation:

Noodles rising and falling in a pot of boiling water. Convection is the movement caused within a fluid by the tendency of hotter and therefore less dense material to rise, and colder, denser material to sink under the influence of gravity, which consequently results in transfer of heat.

USATestprep

serg [7]2 years ago

6 0

The answer is noodles rising and falling in a pot of boiled water
The option is D)

You might be interested in

Write the balanced chemical reaction for the following nitrogen cycle reactions. These reactions are mediated by bacteria and pl

Leto [7]

Answer:

Nitrification is a biological process by which ammonia is oxidized to nitrites ( $NO_{2} ^{-}$ ) and then to nitrates ( $NO_{3} ^{-}$ ) by action of specialized bacteria in nature (such as <em>nitrosomonas</em> and <em>nitrobacter</em>).

Explanation:

This two-step process utilizes molecular atmospheric oxygen and ammonia and ammonium components of soil and nature.

<em>(a.) Ammonia and ammonium compounds to nitrite</em>

$NH_{4} ^{+} + O_{2}$ → $NO_{2} ^{-} + 4H^{+}$

$2NH_{3} ^{+} + 3O_{2}$ → $2NO_{2} ^{-} + 2H^{+} + 2H_{2} O$

<em>(b.) Nitrite to nitrate</em>

$2NO_{2} ^{-} + O_{2}$ → $2NO_{3} ^{-} + energy$

<em>(c.) The reverse process involves reduction of nitrates to molecular nitrogen, called denitrification (with succinic acid in the equation below).</em>

$4NO_{3} ^{-} + 10H^{+} + (CH_{2})_{2}(COOH)_{2}$ → $2N_{2} +4CO_{2} + 8 H_{2} O$

( $NO$ and $N_{2}O$ is an intermediate product in this process.)

4 0

2 years ago

If 15.5 mL of 0.225 M aqueous magnesium chloride is added to 37.5 mL of 0.250 M aqueous lead(II) nitrate, then what mass of lead

Evgen [1.6K]

Answer:

B. 0.971 g

Explanation:

When MgCl₂(aq) reacts with Pb(NO₃)₂(aq), PbCl₂(s) and Mg(NO₃)₂(aq) are produced:

MgCl₂(aq) + Pb(NO₃)₂(aq) →, PbCl₂(s) + Mg(NO₃)₂(aq)

Thus, we need to find imiting reactant finding moles of each reactant:

<em>Moles MgCl₂:</em>

15.5mL = 0.0155L * (0.225 mol / L) = 3.49x10⁻³ moles

<em>Moles Pb(NO₃)₂:</em>

37.5mL = 0.0375L * (0.250mol / L) = 9.38x10⁻³ moles

As the ratio of the reactants is 1:1, the moles of PbCl₂ are 3.48x10⁻³ moles.

We need to convert thes moles to mass using molar mass of PbCl₂ (278.1g/mol), thus:

3.48x10⁻³ moles * (278.1g/mol) =

0.968g of PbCl₂ are precipitate

Thus, right answer is:

<h3>B. 0.971 g</h3>

4 0

2 years ago

When did man-made acid rain first become a problem?

kvv77 [185]

<span>First identified in 1872 in Sweden

</span>

5 0

2 years ago

xxTIMURxx [149]

Answer:

HBr

Explanation:

Acids have Hydrogen as their first/leading element.

3 0

2 years ago

How do you know where something fits on the electromagnetic spectrum? I currently have the Hz but do I need to convert that into

natulia [17]

Answer:

can oxygen exist as a liquid and solid

3 0

1 year ago