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3 years ago

How many sig figs are in 6.0395? Please no links-

Chemistry

1 answer:

kirza4 [7]3 years ago

6 0

Answer:

5 significant figures

Explanation:

<em>The zeros as considered when they are in between or after numbers greater than zero. </em>

Ex1: 0.005 = 1 significant figure

Ex2: 0.0050 = 2 significant figure

Ex3: 0.05500= 4 significant figure

Ex4: 5.00 = 1 significant figure

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3 years ago

A 20g sample of iron at a temperature of 120oC is placed into a container of water. There are 300 milliliters of water in the co

galben [10]

Answer:

30.63 °C will be the final temperature of the water.

Explanation:

Heat lost by iron will be equal to heat gained by the water

$-Q_1=Q_2$

Mass of iron = $m_1=20 g$

Specific heat capacity of iron = $c_1=0.444 J/g^oC$

Initial temperature of the iron = $T_1=120^oC$

Final temperature = $T_2$ =T

$Q_1=m_1c_1\times (T-T_1)$

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Density of water = 1 g/mL

Mass of water= $m_2=300 mL\times 1 g/mL = 300 g$

Specific heat capacity of water= $c_2=4.184 J/g^oC$

Initial temperature of the water = $T_3=30^oC$

Final temperature of water = $T_2$ =T

$Q_2=m_2c_2\times (T-T_3)$

$-Q_1=Q_2$

$-(m_1c_1\times (T-T_1))=m_2c_2\times (T-T_3)$

On substituting all values:

we get, T = 30.63°C

30.63 °C will be the final temperature of the water.

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3 years ago

True or false : rust formation is not a chemical property of iron

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Answer:

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2 years ago

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For something to be considered a polar bond, what does the electronegativity difference have to be at a minimum?

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Answer: A bond in which the electromagnetically difference between the atoms is between 0.4 and 1.7 is called a polar covalent bond.

Explanation:

There you go.... your welcome

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3 years ago