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zavuch27 [327]
4 years ago
5

About 75% of living matter is made up of which two essential chemicals?

Chemistry
2 answers:
Alina [70]4 years ago
7 0

Answer:

Carbon and oxegyn

Explanation:

lions [1.4K]4 years ago
3 0

calcium,phosphorus,potassium,and sulfer

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The most common compound on earht is:
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What pressure is exerted by 932.3 g of CH4 in a 0.560 L steel container at 136.2 K?
Roman55 [17]
Molar mass CH4 = 16.0 g/mol

* number of moles:

932.3 / 16 => 58.26875 moles

T = 136.2 K

V = 0.560 L

P = ?

R = 0.082

Use the clapeyron equation:

P x V = n x R x T

P x 0.560 =  58.26875 x 0.082 x 136.2

P x 0.560 = 650.76

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3 years ago
How many grams of water can be produce from the complete reaction of excess nitric acid and 33.2 mL of 0.245 M lithium hydroxide
Mariulka [41]

Mass of water produced : 0.146 g

<h3>Further explanation</h3>

Given

33.2 mL of 0.245 M lithium hydroxide

Required

mass of water

Solution

Reaction

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mol LiOH :

= M x V

= 0.245 x 33.2 ml

= 8.134 mmol

From the equation, the mol ratio of HNO₃ : H₂O = 1 : 1, so mol H₂O = 8.134 mmol

mass H₂O :

= mol x MW

= 8.134 x 10⁻³ mol x 18 g/mol

= 0.146 g

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What is ph of a solution that contains 1.32 grams of nitric acid hno3 dissolved in 750 ml of water​
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what is the pOH of the solution? 10.25 is the answer

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