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expeople1 [14]
3 years ago
13

PLEASE HELP !!!! This is a models of chemistry question

Chemistry
1 answer:
lora16 [44]3 years ago
7 0

Answer:

The 2.8 hrs one i think???

hope this helps

Explanation:

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What is the equilibrium constant of pure water at 25C?
Tomtit [17]

Answer:

In pure water, at 25C, the [H3O+] and [OH-] ion concentrations are 1.0 x 10-7 M. The value of Kw at 25C is therefore 1.0 x 10-14. Although Kw is defined in terms of the dissociation of water, this equilibrium constant expression is equally valid for solutions of acids and bases dissolved in water.

Explanation:

5 0
3 years ago
What is erosion? what are the four agents of erosion​
Savatey [412]

Answer:

Erosion is the transportation of sediment at the Earth's surface. 4 agents move sediment: Water, Wind, Glaciers, and Mass Wasting (gravity).

Explanation:

3 0
3 years ago
What is the percent yield if 0.3 mol ba(no3)2 and 0.25 mol na3po4 react to produce 0.095 mol ba3(po4)2?
Lyrx [107]
The chemical reaction is expressed as:

3Ba(NO3)2 + 2Na3PO4 = Ba3(PO4)2 + 6NaNO3

To determine the percent yield, we need to determine the theoretical yield of the reaction from the given amounts of the reactants. We do as follows:

0.3 mol 3Ba(NO3)2 ( 2 mol Na3PO4 / 3 mol Ba(NO3)2) = 0.2 mol Na3PO4

Therefore, the limiting reactant would be Ba(NO3)2 since it is consumed completely in the reaction.


Theoretical yield = 0.3 mol 3Ba(NO3)2 ( 1 mol Ba3(PO4)2 / 3 mol Ba(NO3)2) = 0.1 mol Ba3(PO4)2

Percent yield = actual yield / theoretical yield = 0.095 mol Ba3(PO4)2 / 0.1 mol Ba3(PO4)2 x 100 = 95% 
4 0
3 years ago
Igneous rock can _____ to form metamorphic rock.
Ne4ueva [31]

Hello,

Question- Igneous rock can _____ to form metamorphic rock.


A. melt


B. harden


C. heat up


D. weather

Answer- Your answer is C. Heat up

Why- Any rock can become any rock igneous metamorphic or even condemnatory just by heating up but when it melts it becomes lava and the rock cycle starts all over again.

Important- If my answer was enough to help uou please mark me as Brainliest, Leave a thanks, and Rate my answer 5 stars thank you and have the best day ever!

3 0
4 years ago
Read 2 more answers
Hook was the first to discover cells in a cork. true or false?
aliina [53]
True, Robert Hooke was the first person to discover cells inside a cork.
5 0
3 years ago
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