Yes cause elements never undergo a chemical interaction and stay
1 x 10 - 15 / 4.2 x 10 - 7
Due to order of operations you have to do do the multiplication and division first, from left to right.
So start with 1.0 x 10. This = 10.
Then you have to skip over the subtraction for now. Multiply 15 by 4.2. This equals 63. Then multiply this by 10, so 630.
Then rewrite the equation. It's 10 - 630 - 7. Then just subtract. 10 - 630 = -620.
-620 - 7 = -627. (Two subtracts make an add)
-627 is your answer
The statement is false because the retention factor is affected by temperature, amount of material, or time.
Chromatography is a method of separation which involves the use of two phases; a stationary phase and a mobile phase.
The stationary phase is usually the adsorbent column while the mobile phase is the eluting solvent containing the mixture.
The retention factor is the ratio of the distance moved by the mixture to be separated to the distance moved by the solvent alone.
The retention factor depends on the degree of interaction between the mobile phase and the stationary phase. This interaction may be affected by temperature, amount of material, or time.
In summary, the retention factor, Rf, is affected by temperature, amount of material, or time because it depends on the interaction of the mobile phase and the stationary phase.
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First the population slowly increase but then decreases due to unavailability of food resources.
<h2>Factors that effects increase in population</h2><h2 /><h3>Food resources</h3>
Populations slowly increase and decrease based on food resources because there is a competition for food between two organisms which feed on the similar type of food. First the population of both organisms increases due to availability of sufficient food.
<h3>Carrying capacity</h3>
But when the population reaches beyond the carrying capacity the population of both organisms starts decreasing due to unavailability of food so that's why we can say that first the population slowly increase but then decreases due to unavailability of food resources.
Learn more about carrying capacity here: brainly.com/question/14645317
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One milliliter is equivalent to one centimeter cubed. Therefore,
7,120 mL = 7,120 cm³
One decimeter is equal to ten centimeters,
1 dm = 10 cm
Cubing both sides,
1 dm³ = 1000 cm³
x dm³ = 7,120 cm³
Cross multiplying and solving for x, we get
7.12 dm³ = 7,120 mL
