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3 years ago

15

Please help me this is due tonight at 9pm WORTH 90 POINTS AND NO LINKS!!!

2 answers:

marysya [2.9K]3 years ago

6 0

Answer:

If the tilt of the axis changed, timezones and the seasons would be at different times in different places. the might also be longer or more intense. but the intensity and duration of these seasopns would greately vary depending on the change.

Explanation:

The tilt in the earl's axis is the reason we have seasons. Certain times of the year our earth is actually closer. this is compunded byu the fact that our orbit around the sun isn't a circle. Its more of an oval. so even without the tilt we are just closer that time of the year.

kogti [31]3 years ago

5 0

(i’m not very good at writing but use this as an idea)

changing the told would mess up the amount a daylight/nighttime because they’d be at a different angle from the sun

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If the initial volume is 55ml and the final volume after some rocks of sandstone are added is 65ml what is the volume of the chi

AfilCa [17]

Answer:

Volume = 10ml

Density = 1/5 g/ml or 0.20g/ml

Explanation:

The rocks are 10ml since the initial volume went up by 10.

Since density = mass/volume, you divide 2 by 10.

D = 2/10

D = 1/5 g/ml or 0.20g/ml

(Unit is g/ml aka grams/millileter)

7 0

3 years ago

What is Keq for the reaction N₂ + 3H2 = 2NH3 if the equilibrium

hram777 [196]

The Keq for the reaction N₂ + 3H2 = 2NH3 if the equilibrium concentrations are Keq = 1.5. The correct option is D.

<h3>What is Keq?</h3>

Keq is the ratio of the concentration of reactant to the concentration of the product.

The balanced equation is

N₂ + 3H₂ = 2NH₃

The equilibrium constant is $\rm \dfrac{[NH_3]^2}{[N_2]\; [H_2]^3}$

The given concentrations of the compounds have been:

Ammonia = 3 M

Nitrogen = 1 M

Hydrogen = 2 M

$\rm \dfrac{9}{1\times 8} = 1.5$

Thus, the correct option is D. Keq = 1.5.

Learn more about Keq

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3 0

2 years ago

Q2. 0.254 g of KHP (204 g/mol) titrated against 20.0 mL of unknown NaOH (40.0 g/mol) solution to get the end point of phenolpht

Vera_Pavlovna [14]

Answer:

<u>Mass concentration (g/L) </u><u><em>= 2.49g/L.</em></u>

Explanation:

No. of moles = $\frac{mass}{molar mass}$

= $\frac{0.254}{204}$ = 0.001245 moles

Concentration of KHP (C1) in litres = n/v

= $\frac{0.001245}{0.02}$ = 0.062 mol/L

We know that:

$C_{1} V_{1}$ = $C_{2} V_{2}$

where c1v1 and c2v2 are the products of concentration and volumes of KHP and NaOH respectively.

Since mole ratio is 1 : 1.

1 mole of NaOH - 40g

0.001245 mole of NaOH = 40 × 0.001245 = 0.0498g

⇒0.0498g of NaOH was used during the titration

<u><em>∴Mass concentration (g/L) = 0.0498g ÷ 0.02L</em></u>

<u><em>= 2.49g/L.</em></u>

3 0

3 years ago

Help me pleaseee. ty if you dooo :))

Lina20 [59]

$\huge \fcolorbox{black}{red}{♛answer♛}$

Hydrogen Fluoride / HF

$\huge\sf\underline{\underline{\red{❥︎ Thanks}}}$

3 0

3 years ago

Which is a major environmental concern for our oceans?

padilas [110]

Plastic pollution is the correct answer

3 0

3 years ago

Read 2 more answers