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3 years ago

9

Which of the following substances are not homogeneous mixtures?

1 answer:

Tanya [424]3 years ago

7 0

Answer: it’s B

Explanation:

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Which of these pH numbers indicates the highest

Korvikt [17]

<span>(1) 5 because it it below 7 and anything below ph 7 is acidic! Hope this helps you!! =')</span>

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By what factor would the average kinetic energy of the particles by increased if the temperature of a substance was increased fr

natita [175]

Average kinetic energy of a particle :
0.5 mv^2 = kT/2
so the kinetic energy = kT/2
assuming the same value of K
T1 = -49 + 273 = 224
T2 = 287 + 273 = 560

E2 / E1 = kT2 / 2 / kT1 / 2
E2 / E1 = T2 / T1
E2 / E1 = 560 / 224 = 2.5
so the average kinetic energy of the particle increases by 2.5

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3 years ago

Perform each of the following unit conversions using the conversion factors given below:

andrezito [222]

1. 1086.04 mmHg

2.70.213 mmHg

3. 95.954 kPa

<h3>Further explanation</h3>

Pressure (P) is the force applied per unit area

Can be formulated :

$\tt P=\dfrac{F}{A}$

P = pressure (SI=Pascal(Pa))

F= force applied (N)

A=area(m²)

The unit of pressure can be expressed in atm, mmHg, or Pascal

$\tt 1.\dfrac{1.429}{1}\times 760=1086.04~mmHg$

$\tt 2)~9,361~Pa=9.361~kPa=\dfrac{9.361}{101.325}\times 760=70.213~mmHg$

$\tt 3)\dfrac{725}{760}\times 1=0.947~atm=\dfrac{0.947}{1}\times 101.325=95.954~kPa$

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2 years ago

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Some chemical reactions can proceed in just one direction . True or False ?

ss7ja [257]

The answer is False. i think

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Mariana [72]

Answer:

the symbol is He

Explanation:

Helium

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