6th grade science help me if you can c:

Chemistry

1 answer:

lesya [120]4 years ago

4 0

B. Troposphere, stratosphere, mesosphere, thermosphere

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What is the vocab word for are first to grow in a new or disturbed area

ehidna [41]

Not quite sure what you're asking, but I think what you're looking for is 'Native Species'.

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4 years ago

State of matter

Nina [5.8K]

Answer:

H₂

Explanation:

To solve this question we must find, as first, find the molar mass of the homonuclear diatomic gas using Graham's law. With the molar mass we can identify this gas

Graham's law:

$\frac{V_a}{V_b} =\sqrt{\frac{m_B}{m_A} }$

Where V is the speed of the gases and m the molar mass of those:

As Va is 3.98 times Vb (And mB is molar mass of oxygen gas = 32g/mol)

$3.98 =\sqrt{\frac{32g/mol}{m_A} }$

15.84 = 32g/mol / mA

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As is a homonuclear diatomic gas, the molar mass of the atom is 1.01g/mol. Thus, the gas is:

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3 years ago

A certain solution of methylamine has a pOH of 6.8, while a solution of pyridine has a pOH of 6.0. Which solution has a greater

Liono4ka [1.6K]

Answer:

Pyridine solution has a greater concentration of hydroxide ions.

Explanation:

The pOH of the solution is defined as negative logarithm of hydroxide ion concentration in a solution.

$pOH=-\log [OH^-]$

Higher the value of pOH lessor will be the hydroxide ion concentration and higher the concentration of hydrogen ions in the solution .
Lower the value of pOH higher will be the hydroxide ion concentration and lower the concentration of hydrogen ions in the solution.

1) The pOH of the methylamine = 6.8

$6.8=-\log[OH^-]$