All categories

2 years ago

What do the red arrows represent

Chemistry

1 answer:

Viefleur [7K]2 years ago

6 0

Answer:

There are three forces acting on the skateboard. One of these forces is the weight of the rider. Another is the force of gravity on the board itself. The third is the force of the ground pushing up on the skateboard.

You might be interested in

An organic compound was synthesized and found to contain only c, h, n, o, and cl. it was observed that when a 0.150 g sample of

Alexandra [31]

The composition is 25.1 % C, 4.22 % H, 9.79 % N, 49.7 % Cl, 11 % O.

We must calculate the masses of C, H, N, Cl, and O from the masses given.

Mass of C in 150 mg X =138 mg CO₂ × (12.01 mg C/44.01 mg CO₂) = 37.66 mg C

Mass of H in 150 mg X = 56.6 mg H₂O × (2.016 mg H/18.02 mg H₂O) = 6.332 mg H

Mass of N in 200 mg X = 23.8 mg NH₃ × (14.01 g N/17.03 g NH₃) = 19.58 mg N

Mass of N in 150 mg X = 19.58 mg N × (150 mg X/200 mg X) = 14.68 mg N

Mass of Cl in 125 mg X = 251 mg AgCl × (35.45 mg Cl/143.32 mg AgCl) = 62.08 mg Cl

Mass of Cl in 150 mg X = 62.08 mg Cl × 150 mg /125 mg X) = 74.50 mg Cl

Mass of O in 150 mg X = (150 – 37.66 -6.332 -14.68 – 74.50) mg = 16.8 mg

% C = 37.66 mg/150 mg × 100 % = 25.1 %

% H = 6.332 mg/150 mg × 100 % = 4.22 %

% N = 19.58 mg/200 mg × 100 % = 9.79 %

% Cl = 62.08 mg/125 mg × 100 % = 49.7 %

% O = 16.8 mg/150 mg × 100 % = <u>11 %</u>

TOTAL = 100 %

4 0

3 years ago

Question 25 of 26

denis-greek [22]

Answer:

Total mass of leaked fluorine in six months= 0.405 kg

Explanation:

From the given,

Leaked mass of freon = 35.12 gm

Molecular mass of freon = $C_{2}H_{2}F_{3}Cl = (2\times 12)+(2\times1)+(3\times19)+(1\times35.5)=118.5g/mol$

Total weeks per month = 4

Fluorine released into the air in total weeks = $6/times4=24$

3 molecules of fluorine is present in the freon $C_{2}H_{2}F_{3}Cl$

${\tex Mass\,leak\,rate\,of\,fluorine}\,= \frac{Mass\,of\,fluorine\,in\,freon}{Molecularmass\,of\,freon}\times leak\,rate$

$\frac{19\times 3}{118.5}\times 35.12=16.8gm/week$

Total mass of fluorine leaked in six months = $24\times16.9=405.6gm= 0.405 kg$

6 0

3 years ago

A 16.42 mL volume of 0.1327 M KMnO4 solution is needed to oxidize 25.00 mL of a FeSO4 solution in acidic medium. What is the con

statuscvo [17]

The concentration of the FeSO4 solution in molarity would be 0.4356

The concentration can be derived first by writing out the balanced equation of the reaction:

$5Fe^2^++MnO^4^-+8H^+--->5Fe^3^++Mn^2^++4H_2O$

From the balanced equation: for every 1 mole of KMnO4, 5 moles of FeSO4 is needed for complete oxidation.

Recall that: mole = molarity x volume

Mole of KMnO4 needed = 0.1327 x 0.01642

= 0.002179 mole

1 mole KMnO4 = 5 mole FeSO4

0.002178 mole = 5 x 0.002178/1

= 0.01089 moles of FeSO4

Molarity of FeSO4 = mole/volume

= 0.01089/0.025

= 0.4356 M

More on the calculation of molarity of solutions can be found here: brainly.com/question/16587536

6 0

3 years ago

How can water change? I or change into a If 1-Heat causes water toi 2-Water that goes into the alr is called tral air makrs wate

Fofino [41]

1 - evaporate

2 - steam / water vapor

3 - condense

4 - ice

5- ocean/bodies of water

6 - water cycle

4 0

3 years ago

Hydrogen may not be advantagous as a fuel because-------

sergeinik [125]

Answer:

Hydrogen may not be advantageous as a fuel because...

- Its expensive

- Its difficult to store

- Its highly flammable

- Its dependent on fossil fuels

Explanation:

Its expensive - Not only is hydrogen gas expensive, but it also takes a lot of work to free from other elements. It is both expensive and time-consuming to produce.

Its difficult to store - Moving hydrogen is not an easy task. Moving anything more than small amounts of hydrogen was also very expensive, making it impractical.

Its highly flammable - When exposed to the atmosphere, hydrogen could potentially form explosive mixtures.

Its dependent on fossil fuels - Hydrogen energy itself is renewable. However, the process of separating it from oxygen uses non-renewable sources such as coal and oil.

~Hope this Helps!~

7 0

3 years ago