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3 years ago

How many moles are in 987 grams of Ra(OH)2

Chemistry

2 answers:

ra1l [238]3 years ago

7 0

Molar mass Ra(OH)2 = 260 g/mol
Moles = 987 g / 260 = 3.80 moles

Ket [755]3 years ago

5 0

Answer:

3.84mol

Explanation:

How many moles are in 987 grams of Ra(OH)2

the elements in the compound are as follows

radium

oxygen

and hydrogen

to get the the mole, we say the ratio of mass of the compound to the molecular mass(g/mol)

molecular mass= 223 + 16 * 2 + 1 * 2 =257 g/mol

mass=987g is defined as the quantity of matter in a body

mol=987/257

mol=3.84mol

mol has to do with the amount of a substance.

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Answer:

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2 years ago

The half-life of a strontium isotope is 25 years. How much of this particular isotope will remain after 100 years if the startin

Phoenix [80]

Answer:

1 gram

Explanation:

Half life = 25 years

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2 years ago

He molecular formula mass of this compound is 180 amu . what are the subscripts in the actual molecular formula?

mezya [45]

I can't actually answer this one if the empirical formula is not given. Luckily, I've found a similar problem from another website. The problem is shown in the picture attached. It shows that the empirical formula is CH₂O. Let's calculate the molar mass of the empirical formula.

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Then, let's divide this to the molar mass of the molecular formula.
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2 years ago

What is the best place to find detailed information about a hazardous chemical used in your work area

azamat

Answer:

MSDS -- Material Safety Data sheet

Explanation:

The full form of MSDS is Material Safety Data sheet. A Material Safety Data Sheet is a document which contains the information related to the potential hazards (fire or reactivity and environmental and health ) and includes how to work or use the chemical product safely.

It is regarded as an essential starting point for development of the complete health as well as safety program. MSDS also contains other information such as the use of the chemical, its storage and also handling and the emergency procedures that are related to the hazards of the material.

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2 years ago

Question: convert 22.63 miles of oxygen to volume very urgent

Stels [109]

Answer:

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Explanation:

From the question given above, the following data were obtained:

Number of mole of O₂ = 22.63 moles

Volume of O₂ =?

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With the above information, we obtained the volume occupied by 22.63 moles of O₂ as follow:

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2 years ago