Why is it dangerous to not have the right grade motor oil for the climate you drive in?

Chemistry

2 answers:

IgorLugansk [536]3 years ago

6 0

Answer:

When temperature increases the viscosity of the oil decreases and flows too freely through the engine.

When temperature decreases the viscosity of the oil increases and does not flow fast enough through the engine.

Explanation:

When liquids flow they experience a drag in their forward movement. This drag force is called viscosity which acts in the opposite direction to the flow of the liquid.

As temperature increases the kinetic energy of the liquid particles also increases which then reduces the drag force or viscosity. Similarly as temperature decreases the kinetic energy of the liquid particles also decreases which then increases the drag force or viscosity.

Roman55 [17]3 years ago

5 0

Actually its the second and fourth one for sure! If you just put one it only gives parcel credit. ;-;

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It is possible to make a model of a fission chain reaction with mousetraps and table tennis balls, with the balls placed on an a

konstantin123 [22]

Answer:

The table tennis balls represent neutrons that are released when the nucleus splits and cause other nuclei to split

Explanation:

Nuclear fission is defined as the separation of a nucleus into two smaller nuclei.

It takes a neutron to set off a nuclear fission reaction. When that occurs, neutrons are released and those neutrons in turn are what set off other nuclear fissions. This is defined as a Nuclear Fission Chain Reaction. In the model, the one tennis ball that will be thrown will be modeled as the starting neutron that sets of the initial (first) fission. The mouse traps with tennis balls represent the other nucleuses waiting to be struck by the one tennis ball. Once the initial tennis ball strikes the first mouse trap, that mouse trap will release its tennis ball hitting others and continuing the cycle.

It can also be modeled as such:

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2 years ago

What weight (in grams) of h2so4 would be needed to make 750.0 ml of 2.00 m solution?

frosja888 [35]

Answer:

I think the answer should be 147

Explanation:

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1 year ago

Which element has a larger atomic radius than sulfur? chlorine cadmium fluorine oxygen

zhuklara [117]

Answer:

Cadmium has larger atomic radius than sulfur.

Explanation:

Down a period, atomic radii decrease from left to right due to the increase in the number of protons and electrons across a period: when a proton is added the pull of the electrons towards the nucleus is larger, so the size of the atom decreases.

Hence, you can compare the elements that belong to a same period and predict that the atom with lower atomic number (number of protons) will haver larger atomic radius. With that:

Oxygen and fluorine are in the period 3, being oxygen to the left of fluorine, so oxygen is larger than fluorine.

Sulfur and chlorine are in the period 4, being sulfur to the left of chlorine, so sulfur is larger than chlorine.

Now see whan happens down a group. Atomic radius increases from top to bottom within a group due to electron shielding. That permits you to compare the size of the elements in a group:

Fluorine and chlorine are in the same group (17), with chlorine directly below fluorine, so the atomic radius of chlorine is larger than the atomic radius of fluorine.

Sulfur and oxygen are in the same group (16), with sulfur directlly below oxygen, so sulfur the atomic radius of sulfur is larger than the atocmi radius of oxygen.

So far, you can rank the atomic radius of sulfur, chlorine, fluorine, and oxygen, in increasing order as:

O < F < Cl < S, concluding that O, F, and Cl have smaller atomic radius than S.

Cadmiun, Cd, is to the left and below sulfur, so both electron shielding (down a group) and increase of the number of protons (down a period) lead to predict the cadmium has a larger atomic radius than sulfur.

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2 years ago

Find the concentration of H+ ions at a pH = 11 and

Black_prince [1.1K]

Explanation:

the pH of the solution defined as negatuve logarithm of $H^+$ ion concentration.