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9966 [12]
2 years ago
12

7. If you constructed graphs, what trends do they indicate in your data?

Chemistry
1 answer:
lisabon 2012 [21]2 years ago
4 0
A tend line I believe (I am going off the other guy cause they are right.)
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Choose the best tool for each scenario.
Mama L [17]

Answer:

a) Graph

b) Weight balance or gas syringe  or upside-down measuring cylinder

Explanation:

a) Identifying a trend in temperature change over time - The best tool for this scenario is to represents the temperature daily, weekly, monthly or annually on graph to interpret the fluctuation in temperature owing to local seasonal changes and weather conditions

b) Measuring the mass of a product of a chemical reaction - If the product is solid or liquid then the balance is used to measure the mass. If the product is a gas, then  gas syringe  or upside-down measuring cylinder is used.

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4. All of the following are examples of natural causes of air pollution
erma4kov [3.2K]

Answer:

factory emissions

Explanation:

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3 years ago
Please show steps Thanks
Debora [2.8K]

Answer:

chuma ya ndoshi.............

Explanation:

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2 years ago
Calculate the mass of Iron in 40g of Fe203​
Nat2105 [25]

Answer:

   ‏‏‎ ‎

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7 0
2 years ago
During our phase changes lab, where did we place the thermometer?
IrinaK [193]

The thermometer must be <u>in contact with the ice/water only</u>

Explanation:

In this experiment in the lab, the aim is to measure the specific latent heat of fusion of water.

The specific latent heat of fusion of a substance is the amount of heat energy required to completely melt a certain amount of the substance, mathematically:

\lambda = \frac{Q}{m}

where

Q is the heat supplied to the substance

m is the mass of the substance

In this experiment, the aim is to measure the specific latent heat of fusion of water. In order to do that, a mix of ice/water is heated with a certain amount of heat Q, and then it is evaluated the amount of mass m that undergoes melting.

An important precaution that must be taken in this experiment is that the temperature of the water/ice mixture remains constant and equal to the melting point of ice (otherwise, part of the heat supplied to the mixture is used to increase the temperature of the water, resulting in an inaccurate measure of Q). Therefore, a thermometer must be used to check constantly the temperature, and this thermometer must be placed inside the ice/water mixture only (It should not touch the saucepan, whose temperature can be higher).

So, the correct answer is

in contact with the ice/water only

Learn more about specific heat:

brainly.com/question/3032746

brainly.com/question/4759369

#LearnwithBrainly

3 0
3 years ago
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