3 years ago

Is it always possible to identify something as an element compound pure substance or mixture

1 answer:

7 0

Is it always possible to identify something as an element, compound, pure substance or mixture just by looking at it?

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A .......... notifies you that danger is present if the directions are not followed.

maksim [4K]

Answer:

A. Warning

Explanation:

Out of all said choices, the best choice would be warning since it would fit the sentence the most.

"A Warning notifies you that danger is present." compared to:

"A Hazard notifies you that danger is present."

"A Safety notifies you that danger is present."

"A Danger notifies you that danger is present."

5 0

2 years ago

NaCl + H2O → NaOH + Cl2 + H2 How many grams of chlorine gas, Cl2 are given off if 7.5 grams of sodium chloride, NaCl, are decomp

german

Yes BC ther is a equal amount of sodiam

3 0

3 years ago

If 3.0 liters of 0.50 m nacl (aq) is mixed with 9.0 liters of 0.2777 m nacl (aq), what is the final concentration of the resulti

Svetradugi [14.3K]

First, we shall calculate the total number of moles present in the final solution.
Number of moles in 0.50 m NaCl = molarity * volume = 0.50 * 3.0 = 1.5 moles.
Number of moles in 0.2777m NaCl = molarity * volume = 0.2777 * 9.0 = 0.24993 moles
Total number of moles = 1.5 + 0.24993 = 1.74993 moles

Second, we shall calculate the total volume of the final solution.
Total volume = 3 + 9 = 12 litres.

The molarity = total number of moles / total volume = 1.74993 / 12 = 0.1458 m

3 0

3 years ago

Match each group on the periodic table with its description. HELP ME PLS

Artist 52 [7]

Very reactive nonmetals.

3 0

2 years ago

What has mass and takes up space? A. matter B. weight C. volume D. space

spayn [35]

Answer:

Matter is anything that has mass and takes up space.

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