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3 years ago

P.S. This is a science question not a chemistry.

Chemistry

1 answer:

Vesnalui [34]3 years ago

3 0

Answer:

B) When the tilt of the Earth causes the sun’s energy/light to be spread out over a larger area, temperatures are ______warmer______ causing _____Summer_______ to occur.

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The temperature of 950 mL of SF6 is changed from 607 K to 525 K. During this, the pressure changes from 66.95 kPa to 16.7 kPa. W

wel

Answer: 250 cause you g

Explanation:

3 0

3 years ago

Read 2 more answers

1. (a) What are the possible interactions<br> between two charged objects?

lord [1]

Answer:

the attractive force between two objects with opposite charges, two objects that are of like charge will repel each other. That is, a positively charged object will exert a repulsive force upon a second positively charged object.

Explanation:

3 0

4 years ago

Atrazine is an herbicide widely used for corn and is a common groundwater pollutant in the corn-producing regions of the United

riadik2000 [5.3K]

Answer:

0.94

Explanation:

Let's assume that the total sample of the soil is 1 cm³; which has a porosity of 0.4 cm³; then the original sample of the soil will be 0.6 cm³

The mass of the soil particles in 1 cm³ of soil + water = 0.75 g

The fraction of the total atrazine can be calculated by the expression;

Total atrazine = $C_w(\frac{g}{mL})*V_w(mL)+C_{(soil)}(\frac{g}{soil})*M_{(soil)}(gsoil)$

Also; $C_{(soil)}(\frac{g}{soil})= K_{oc}(\frac{mL}{gOC})*f_{oc} (\frac{gOC}{gsoil})*C_w(\frac{g}{mL})$

NOTE THAT: $K_{oc}( \frac{mL}{gOC})=K_{oc}\frac{L}{kgOC}$

Total atrazine can now be calculated as:

$C_w*0.4+K_{oc}f_{oc}C_w*0.75$ = $\frac{C_{soil}*M_{soil}}{Total atrazine}$

$=\frac{K_{oc}f_{oc}C_w*M_{soil}}{C_w*0.4+K_{oc}f_{oc}C_w*0.75} = \frac{0.75*K_{oc}f_{oc}}{0.4+K_{oc}f_{oc}*0.75}$

$= \frac{10^{2.52}*0.025*0.75}{0.4+10^{2.52}*0.025*0.75}$

= 0.94

Thus,the fraction of total atrazine that will be adsorbed to the soil = 0.94.

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4 years ago

Balance<br> Sn(s) + HNO3(aq) →SnO2(s) + NO2(g) + H2O(1)

OlgaM077 [116]

Answer:

Sn + 4HNO3 → SnO2 + 4NO2 + 2H2O

Explanation:

7 0

3 years ago

If you take a 15.0-mL portion of the stock solution and dilute it to a total volume of 0.700 L , what will be the concentration

nadezda [96]

Answer:

0.321M would be the concentration of the final solution

Explanation:

In the problem, you are decreasing the concentration of a solution (The stock solution) by the addition of more solvent (This process is known as dilution).

You are increasing the volume of the solution from 15mL to 700mL, that means the solution <em>is diluted:</em>

700mL / 15mL = 46.67 times

Now, to know the concentration of a final solution we need to take the concentration of the stock solution. <em>Assuming the stock solution is 15M:</em>

15M / 46.67 =

<h3>0.321M would be the concentration of the final solution</h3>

4 0

3 years ago