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vampirchik [111]
3 years ago
9

20 ml of an approximately 10% aqueous solution ofethylamine, ch3ch2nh2, is titrated with 0.3000 maqueous hcl.which indicator wou

ld be most suitablefor this titration? the pkaof ch3ch2nh3+is 10.75.
Chemistry
1 answer:
S_A_V [24]3 years ago
5 0

phenolphthalein would be most suitable
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PLEASE HELP: You have been given 2.42 moles of beryllium sulfide (BeS), determine the mass in grams of beryllium sulfide that yo
Alecsey [184]

The mass in grams of the given beryllium sulfide is 99.2 g. The correct option is the second option - 99.2 g BeS

<h3>Calculating mass of a compound </h3>

From the question, we are to determine the mass of the given beryllium sulfide.

From the given information,

Number of moles of beryllium sulfide (BeS) given = 2.42 moles

Using the formula,

Mass = Number of moles × Molar mass

Molar mass of BeS = 41 g/mol

Then,

Mass of BeS = 2.42 × 41

Mass of BeS = 99.22

Mass of BeS ≅ 99.2 g

Hence, the mass in grams of the given beryllium sulfide is 99.2 g. The correct option is the second option - 99.2 g BeS

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2 years ago
What is a chemical formula?
Mashcka [7]

Answer:

A chemical formula is a way of presenting information about the chemical proportions of atoms that constitute a particular chemical compound or molecule, using chemical element symbols, numbers, and sometimes also other symbols, such as parentheses, dashes, brackets, commas and plus and minus signs.

Explanation:

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How many moles of hydrogen atoms are contained in one mole of<img src="https://tex.z-dn.net/?f=C_%7B6%7DH_%7B12%7D" id="TexFormu
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The number of moles of hydrogen atoms contained in 1 mole of c6h12 is 12.

<h3>What is hydrogen made of?</h3>

Hydrogen can be produced from various domestic resources such as fossil fuels, biomass, and the electrolysis of water by electricity. The environmental sustainability and energy efficiency of hydrogen depends on how hydrogen is produced.

Hydrogen is the simplest element. Each hydrogen atom has only one proton. Hydrogen is also the most abundant element in the universe. Stars like the Sun are mainly made of hydrogen. The sun is essentially a giant sphere of hydrogen and helium gas.

Some facts about hydrogen:

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  • Fuel cells are a clean way to generate electricity.

Fuel cell vehicles are very similar to traditional gasoline vehicles

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1 year ago
Aqueous lead (II) nitrate, Pb(NO3)2 undergoes a double displacement reaction with aqueous sodium chloride, NaCl, in which a prec
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Answer:

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