Is the formation of rust on an iron nail a chemical change or a physical change?

Physics

1 answer:

zlopas [31]4 years ago

4 0

Chemical because rust is also called iron oxide (Fe2O3) and it occurs when oxygen bonds with iron atoms

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Your window thermometer shows that the temperature outdoors is 89.3°f. how should you report this temperature to your friend in

SVETLANKA909090 [29]

A) Conversion from Fahrenheit to Celsius:
The relationship between the two scales is the following
$T_f = \frac{9}{5}T_c + 32$
where
$T_f$ is the temperature in Fahrenheit
$T_c$ is the temperature in Celsius

Re-arranging the formula, we find the inverse relationship:
$T_c= \frac{5}{9}(T_f-32)$
and we can use this equation to convert $T_f = 89.3^{\circ}F$ into Celsius:
$T_c = \frac{5}{9}(89.3-32)=31.7^{\circ} C$

(b) Conversion to Kelvin scale:
The conversion between Celsius scale and Kelvin scale is easier:
$T_k = T_c + 273.1$
where $T_k$ is the temperature in Kelvin. Using $T_c = 31.7^{\circ} C$ , we find
$T_k = 31.7 + 273.1 = 304.8 K$

5 0

3 years ago

Please someone help me

beks73 [17]

New substances are formed by chemical reactions. When elements react together to form compounds their atoms join to other atoms using chemical bonds. For example, iron and sulfur react together to form a compound called iron sulfide. Hopefully this will help you decide...

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3 years ago

A current of 0.8 A flows through the motor for 3 minutes. Calculate the total charge in this time.

mixas84 [53]

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