2 years ago

Do you think we can use flame tests to identify unknown metals in a mixture?

1 answer:

4 0

Flame tests are used to identify the presence of a relatively small number of metal ions in a compound. Not all metal ions give flame colors. For Group 1 compounds, flame tests are usually by far the easiest way of identifying which metal you have got.

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You are walking in a clear-cut section of forest a few days after a heavy rainstorm. A nearby stream is very muddy and has many

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the storm knocked down trees creating a dam blocking the path for water to move

Explanation:

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3 years ago

You take the mass of the empty detergent container and find that is 390 g. It’s volume is 300.0ml what it’s density

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390g/300.0ml = 1.3 g/ml

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4 years ago

The movement of food substances from the stems to growing tissues and storage tissues is called:

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Transportation is the movement of food substances (sugars) from the stems to growing tissues and storage tissues.
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3 years ago

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In order to produce an electric current in a coil of wire , a magnet field through the coil must be

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magnet field must also be around the same coil to produce current

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3 years ago

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What is the percent of nitrogen in dinitrogen pentoxide?

Lostsunrise [7]

Answer: D.) 25.9%

Explanation:

Dinitrogen pentoxide chemical formular : N2O5

Calculating the molar mass of N2O5

Atomic mass of nitrogen(N) = 14

Atomic mass of oxygen(O) = 16

Therefore molar mass :

N2O5 = (2 × 14) + (5 × 16) = 28 + 80 = 108g/mol

Percentage amount of elements in N205:

NITROGEN (N) :

(Mass of nitrogen / molar mass of N2O5) × 100%

MASS OF NITROGEN = (N2) = 2 × 14 = 28

PERCENT OF NITROGEN : (28/108) × 100%

0.259259 × 100%

= 25.925%

= 25.9%

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3 years ago