4 years ago

What is the common name of H2O

Chemistry

2 answers:

schepotkina [342]4 years ago

8 0

H2O is also know as water

Mrac [35]4 years ago

8 0

H2O is also known as water

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How many grams of KO2 are needed to form 8.0 g of O2?

dem82 [27]

Using the atomic weights, K = 39, O=16 so KO2= 39+32=71. So K=39/71= 0.549 of KO2 and O2=32=0.45KO2 and O2=8g and 0.45KO2=8g so KO2=8/0.45=17.77g. So to check, K=0.549 x 17.77g=9.76 and so K+O2= 9.76+8g=17.76.

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4 years ago

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What is the number of moles in 15.0 g AsH3?

pentagon [3]

We are given with the mass of Arsine ( $AsH_{3}$

The mass of arsine is 15g

there is a relation between moles, mass and molar mass of any compound which is

$moles=\frac{mass}{molarmass}$

The molar mass of Arsine = atomic mass of As + 3X atomic mass of H

the molar mass of Arsine = 74.92 + 3X 1 = 77.92 g/mol

Let us calculate the moles as

$moles=\frac{15}{77.92}=0.192mol$

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3 years ago

Which of the following does not describe a characteristic of carbon?

anastassius [24]

The characteristic that is not descriptive of C, would be D. It forms bonds with only itself. It forms bonds with almost all other nonmetals, present, like H,O,N, etc.

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3 years ago

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Calculate the percentage of CL in AL(CLO3)3

sweet [91]

Answer:

46.41%

Explanation:

Find the total r.m.m of AL(CLO3)3 put it equals to 100%.....The take 106.5,the total r.m.m of Cl and find the missing which is the percentage by cross multiplication

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3 years ago

El nivel simbólico representa tanto a lo macroscópico como a lo nanoscópico.

alexira [117]

Answer:

verdadero

Explanation:

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