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sukhopar [10]
3 years ago
10

Which of the following is an example of positive acceleration? Q A boy running from his house around the block and ending up bac

k home. A car slowing down as he turns left around a curve. A track star speeding up as he sprints to the finish line. A horse standing in a pasture.
Chemistry
1 answer:
Natalija [7]3 years ago
8 0
The answer is A track star speeding up as he sprints to the finish line.
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Determine the mass of KNO3 that dissolves in 100 grams of water at 40°C to produce a saturated solution
velikii [3]
From a solubility curve the solubility of KNO3 at 40°C is about 63 g / 100 g of water.


That means that 100 g of water at 40°C can dissolve 63 g of KNO3.


A saturated solution is one that cannot dissolve more solute, because it already has reached the greatest concentration that it can hold.


Then, the mass of KNO3 that dissolves in 100 g of water is about 63 g.
5 0
3 years ago
List the advantages and disadvantages of restricting antibioticuse
vlada-n [284]

Answer:

Advantages - less chances of developing resistant strains, less cost, less side effects, allowing the body to mount immune response

Disadvantages - inadequate/incomplete cure leading to complications, longer stay in the hospital

Explanation:

3 0
3 years ago
Use the exponential term in the Arrhenius equation to explain how temperature affects reaction rate.
WINSTONCH [101]

The Arrhenius equation describes the relation between the rate of reaction and temperature for many physical and chemical reactions

It is an expression that provides a relationship between the rate constant (of a chemical reaction), the absolute temperature.

The Arrhenius equation,

k = zpe^{\frac{- Ea}{RT} }, where

k is the rate constant,

z is the collision factor,

p is the steric factor,

Ea is the activation energy,

R = 8.3245 \frac{J}{mol. K} is the ideal gas constant, and,

T is the temperature.

The activation energy by definition, is the minimum energy (or threshold energy) required for two particles of reactants upon collision to form products.

The Arrhenius equation could also be written as:

⇒ k = Ae\frac{-Ea}{RT}, where

⇒ A = zp, the Arrhenius factor.

Taking the neutral logarithm of both parties, we get:

⇒ In k = \frac{-Ea}{RT}\frac{(1)}{(T)} + In A,

Assuming that, A is independent of temperature, when T is increased, the equilibrium constant k will also increase and therefore, the rate of the reaction will also increase.

To learn more about Arrhenius equation here

brainly.com/question/9786461

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2 years ago
A student makes a list of all the soil layers in a temperate region Which layer would be located farthest from the surface of th
Novay_Z [31]

Answer: Bedrock

Explanation: Bedrock is the lowest layer of rock

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3 years ago
How does the composition of water molecule affect its charge
kolezko [41]
It is make the molecule polar.
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3 years ago
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