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Dominik [7]
3 years ago
13

This is Science, if you can answer this, much appreciated :) Both questions a and b, thank you!! I need this asap :)

Chemistry
1 answer:
Andrej [43]3 years ago
7 0
Asap means as soom as possible i blieb
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Josefina and Raul were comparing how sound moves through various mediums and how charge moves through conducting wires. They per
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They found that difference occurs in the speed of both sound and charges occur due to the difference in the type of medium.

Sound and charges needs specific medium for faster movement i.e. sound moves faster in solid as compared to liquid and gas whereas charges moves faster and easily in gold due to lower resistance which is followed by copper. Sound can move from solid, liquid and gases whereas charges move only in solid metal in which free electrons are present. The speed of sound and flow of current are affected due to difference in the arrangement of atoms in solid, liquid and gas.

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Thermal energy is what we call energy that come from ___ of matter
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Thermal energy is a kinetic form of energy that comes from the <u>temperature </u>of matter

Explanation:

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experiment can show the movement of pollutants through the groundwater!

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A mass of 100.0 g of NaCl is added to 100.0 mL of water, but not all of it dissolves. A mass of 59.5 grams of NaCl solid remains
Taya2010 [7]

Answer:

The molarity of the dissolved NaCl is 6.93 M

Explanation:

Step 1: Data given

Mass of NaCl = 100.0 grams

Volume of water = 100.0 mL = 0.1 L

Remaining mass NaCl = 59.5 grams

Molar mass NaCl= 58.44 g/mol

Step 2: Calculate the dissolved mass of NaCl

100 - 59. 5 = 40.5 grams

Step 3: Calculate moles

Moles NaCl = 40.5 grams / 58.44 g/mol

Moles NaCl = 0.693 moles

Step 4: Calculate molarity

Molarity = moles / volume

Molarity dissolved NaCl = 0.693 moles / 0.1 L

Molarity dissolved NaCl = 6.93 M

The molarity of the dissolved NaCl is 6.93 M

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The students in the picture below are using a globe and a lamp to model the Sun and the Earth. If the model Earth acts the same
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The only one that makes sense IF the model behaves as the Earth is D.

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