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rjkz [21]
2 years ago
9

If you place a glass rod over a burning candle, the glass turns

Chemistry
1 answer:
gladu [14]2 years ago
8 0
A. the wax is a both; 1. physical change-solid to liquid.
2. chemical change- burned to CO2 + H20 + heat + carbon as seen as black on the rod
b. the wick is neither; the wick does not change, just provides conduit for wax to flame
c. the glass rod is physical change; the carbon is only deported
HOPE THIS HELPS, IVE ALSO LEARNING BEEN LEARNING THIS RECENTLY
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A solution of rubbing alcohol is 68.6 % (v/v) isopropanol in water. How many milliliters of isopropanol are in a 88.2 mL sample
KonstantinChe [14]


From the information given, the total volume of  rubbing alcohol is 88.2 ml

68.6 % of this volume is isopropanol. 

We will assume 88.2 ml represents 100% volume, so the volume of water will be 31.4 %

The volume of isopropanol is

68.6/100 x 88.2 → 0.686 × 88.2 = 60.505 ml

The volume of isopropanol is 60.5 ml.

Volume of water will be 88.20 - 60.5 = 27.7 ml

(27.7 / 88.2 × 100 = 31.4% )

Adding 60.5 ml of isopropanol to 27.7 ml of water to make up 88.2 ml will give 68.6 % v/v isopropanol to water  solution.



8 0
3 years ago
If you were to place the beaker containing the products of the reaction between copper ii chloride and aluminum on a balance, ho
Allisa [31]
The mass would be same because of the law of conservation which states that the mass of the reactants must equal to the mass of products
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3 years ago
Help ASAP pleaseeee thank you
Artyom0805 [142]
The correct answer is B. balance
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2 years ago
During an investigation, similar glow sticks were placed in two beakers containing water at different temperatures. A record of
allochka39001 [22]

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For a reaction 2A + B 2C, with the rate equation: Rate = k[A]2[B]
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For reaction

2 A + B  ------------> 2 C  

Rate = K [ A ]² [ B ]

<span> the order with respect to A is 2 and the order overall is 3.
</span>
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