3 years ago

What causes the energy transformation that occurs when the brake pads on a bicycle

Chemistry

1 answer:

makkiz [27]3 years ago

5 0

Your answer would be D friction.

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Calculate the partial pressure of the CO2 in the expired air at its peak, assuming 1 atm pressure and a body temperature of 37∘C

kvasek [131]

Answer:

P2= 45.50 atm

Explanation:

If the amount of gas in the tanks remains same we use the equation P1T1=P2T2

40 x 281.15 = P2 x 247.15

P2= 45.50 atm

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3 years ago

Tính nộng độ mol/l của các chất tan trong các dung dịch sau: a) Trong 100ml dung dịch (A) có chứa 0,0365g HCl. (Cho: H=1; Cl=35,

makkiz [27]

Explanation:

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2 years ago

Most of the sulfur used in the United States is chemically synthesized from hydrogen sulfide gas recovered from natural gas well

galben [10]

Answer:

$0.21\ \text{kg/s}$

Explanation:

P = Pressure = $0.48\ \text{atm}=0.48\times 101325\ \text{Pa}$

V = Volume = $450\ \text{L/s}=450\times 10^{-3}\ \text{m}^3/\text{s}$

R = Gas constant = $8.314\ \text{J/mol K}$

T = Temperature = $(264+273.15)\ \text{K}$

The reaction is

$2H_2S+3O_2\rightarrow 2SO_2+2H_2O$

From ideal gas equation we have

$PV=nRT\\\Rightarrow n=\dfrac{PV}{RT}\\\Rightarrow n=\dfrac{0.48\times101325\times 450\times 10^{-3}}{8.314\times (264+273.15)}\\\Rightarrow n=4.9\ \text{mol}$

Moles of $SO_2$ produced is

$\dfrac{2}{3}\times 4.9=3.267\ \text{moles}$

Molar mass of $SO_2$ = 64.066 g/mol

Production rate is

$3.267\times 64.066=209.3\ \text{g/s}=0.21\ \text{kg/s}$

The rate at which sulfur dioxide is being produced $0.21\ \text{kg/s}$ .

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2 years ago

Which of the following shows a chemical reaction in which hydrogen sulfide and oxygen are the reactants and sulfur and water are

Volgvan

Answer:

ok soo

Explanation:

first of all...that's not maths that looks like some type of alien language

4 0

3 years ago

Not the best in chemistry please help

aliya0001 [1]

The answer is B the highest point

3 0

3 years ago

Read 2 more answers