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Lady bird [3.3K]

3 years ago

8

A hypothesis MUST be supported by the results. True or false

1 answer:

Usimov [2.4K]3 years ago

8 0

Answer:

I think this answer is True.

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Which of the following should be classified as a mixture? water air iron helium

Evgesh-ka [11]

Air is a mixture because it is made up of many constituents like oxygen, argon etc. it can be physically separated by fractional distillation. it doesnt have a formula unlike compounds and elements. its composition varies differently with its constituents.

5 0

3 years ago

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An interesting enzyme, whose molecular weight is 56,000 g/mol, is used in catalytic amounts to cleave a membrane protein, whose

Anastaziya [24]

Answer:

65,000 g/mol, 43,000g/mol and 22,000 g/mol.

Explanation:

The explanation can be found in the attachment

4 0

3 years ago

What would happen if a Continental Tropical Front meets a Maritime Polar front?

rewona [7]

Answer:

As soon as a front passes a particular location, the weather could change from a steamy maritime tropical air mass to a dry.

Explanation:

hope this helps

7 0

3 years ago

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A mixture of N2, O2, and Ar has mole fractions of 0.25, 0.65, and 0.10, respectively. What is the pressure of N2 if the total pr

s344n2d4d5 [400]

Answer:

Partial pressure of nitrogen gas is 0.98 bar.

Explanation:

According to the Dalton's law, the total pressure of the gas is equal to the sum of the partial pressure of the mixture of gases.

$P=p_{N_2}+p_{O_2}+p_{Ar}$

$p_{N_2}=P\times \chi_{N_2}$

$p_{O_2}=P\times \chi_{O_2}$

$p_{Ar}=P\times \chi_{Ar}$

where,

$P$ = total pressure = 3.9 bar

$p_{N_2}$ = partial pressure of nitrogen gas

$p_{O_2}$ = partial pressure of oxygen gas

$p_{Ar}$ = partial pressure of argon gases

$\chi_{N_2}$ = Mole fraction of nitrogen gas = 0.25

$\chi_{O_2}$ = Mole fraction of oxygen gas = 0.65

$\chi_{Ar}$ = Mole fraction of argon gases = 0.10

Partial pressure of nitrogen gas :

$p_{N_2}=P\times \chi_{N_2}=3.9 bar\times 0.25 =0.98 bar$

Partial pressure of oxygen gas :

$p_{N_2}=P\times \chi_{O_2}=3.9 bar\times 0.65=2.54 bar$

Partial pressure of argon gas :

$p_{N_2}=P\times \chi_{Ar}=3.9 bar\times 0.10=0.39 bar$

7 0

4 years ago

Which of the following is not equal to 0.1 centimeters?

Anon25 [30]

Answer:

c) 10 millimeters (mm)

Explanation:

The unit conversions are as follows:

1 cm = 10 mm (millimeter)

1 cm = 0.01 m (meter)

1 cm = 0.00001 km (kilometer)

1 cm = 10000 μm (micrometer)

Based on the above conversions:

$0.1 cm = \frac{10 mm*0.1 cm}{1 cm} = 0.1 mm$

$0.1 cm = \frac{0.01 m*0.1 cm}{1 cm} = 0.001 m$

$0.1 cm = \frac{0.00001 km * 0.1 cm}{1 cm} = 0.000001 km$

$0.1 cm = \frac{10000 um*0.1cm}{1 cm} =1000 um$

Therefore, 0.1 cm = 10 mm is incorrect instead it is 0.1 mm

8 0

4 years ago

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