3 years ago

PLEASE HELP ME!!

Chemistry

1 answer:

Mama L [17]3 years ago

5 0

Answer:

Explanation:

3 CARBON ATOMS 8 HYDROGEN

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Solve. List your answer in scientific notation and use sig figs.<br> (3.2 x 10^-4)/(1.4 x 10^8)

son4ous [18]

0.00032 / 140000000
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3 years ago

BRAINLIESTTT ASAP!! PLEASE HELP ME :)

tatyana61 [14]

Answer:

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Explanation:

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3 years ago

A lead–tin alloy of composition 30 wt% Sn–70 wt% Pb is slowly heated from a temperature of 150°C (300°F).(a) At what temperature

Novay_Z [31]

Answer:

a) 231.9 °C

b) 100% Sn

c) 327.5 °C

d) 100% Pb

Explanation:

This is a mixture of two solids with different fusion point:

$Tf_{Pb}=327.5 C$

$Tf_{Sn}=231.9 C$

<u>Given that Sn has a lower fusion temperature it will start to melt first at that temperature. </u>

So the first liquid phase forms at 231.9 °C and because Pb starts melting at a higher temperature, that phase's composition will be 100% Sn.

The mixture will be completely melted when you are a the higher melting temperature of all components (in this case Pb), so it will all in liquid phase at 327.5 °C.

At that temperature all Sn was already in liquid state and, therefore, the last solid's composition will be 100% Pb.

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4 years ago

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Margaret [11]

Answer: I believe/don't believe hummingbirds are attracted to the color red because ... (Enter your reasons)

Explanation:

Hypothesis are always different, up to you to choose believe or not believe depending on your position.

:) Hope this helped.

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scZoUnD [109]

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