3 years ago

The colour imparted to a flame by calcium ion?

Chemistry

1 answer:

igor_vitrenko [27]3 years ago

7 0

I not sure, but i know that is soft yellow no white not yellow.

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If I have 3.5 moles of C, and excess Fe2O3 , how many moles of Fe can I produce?

Wittaler [7]

Answer:

3.5 moles Fe

Explanation:

From the equation, Reaction of 2 moles of Fe₂O₃ with 1 mole of C produces 1 mole of Fe. When excess Fe₂O₃ is used, the only liming factor is C.

The ratio of amount of C used to the amount of Fe produced is 1:1

Therefore, if 3.5 moles of C are used, 3.5 moles of Fe are also produced.

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3 years ago

Doesn't have to be a detailed explaination

vodomira [7]

Answer:

it is 1e-0

Explanation:

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2 years ago

If the density of a 45.0 cm3 block of wood is 0.65 g/ml what is the mass of the wood?

wlad13 [49]

Answer:

$\boxed {\tt mass=29.25 \ grams}$

Explanation:

The density formula is mass over volume.

$d=\frac{m}{v}$

Rearrange the formula for the mass, m. Multiply both sides of the formula by v.

$d*v=\frac{m}{v}*v$

$d*v=m$

Mass can be found by multiplying the density and volume. The density is 0.65 grams per milliliter and the volume is 45.0 cubic centimeters.

A cubic centimeter is equal to a milliliter.

Therefore, 45 cubic centimeters also equals 45 milliliters.

$d= 0.65 \ g/mL\\v= 45 \ mL$

Substitute the values into the formula.

$0.65 \ g/mL * 45 \ mL=m$

Multiply. Note the milliliters, or mL will cancel out.

$0.65 \ g * 45=m$

$29.25 \ g=m$

The mass of the wood is 29.25 grams.

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3 years ago

You’ll soon make two pieces of ice with the approximate shapes shown in the image. Both pieces of ice have the same mass and vol

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Is there an image? I'll stay to help you.

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3 years ago

1. What is the difference between charging by conduction and charging by induction?

telo118 [61]

Answer:a

Explanation:

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