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3 years ago

How can you use density to separate mixtures like sand and small plastic pellets?

Chemistry

2 answers:

suter [353]3 years ago

8 0

Answer:

Slide a magnet through the mixture. When you take the magnet off, the iron filings are going to be attracted to the magnet and the sand will stay in the bowl

Explanation:

Nady [450]3 years ago

6 0

Answer:

Density can be used to separate the substances that make up a mixture, because each substance in a mixture has its own density. For example, if a mixture of sand and oil is placed in water, the sand will sink to the bottom of the container. The sand is more dense than the water.

Explanation:

Please mark me as brainy if this helps

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Water molecules have unique physical and chemical properties that enable them to perform important functions in living organisms

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Answer: cohesion

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3 years ago

How to calculate the amount of Moles of calcium carbonate<br> Show work

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Answer:

1 moles Calcium Carbonate = 100.0869 gram using the molecular weight calculator and the molar mass of CaCO3. ... How many moles Calcium Carbonate in 1 grams? The answer is 0.0099913175450533.

Explanation:

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4 years ago

As a phase change occurs when energy is removed or added to a system, the temperature of the substance stays constant because

Rashid [163]

Answer:

energy is being used to make or break bonds between molecules

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3 years ago

In a lead-acid battery, the electrodes are consumed. In this battery, Select one: a. the anode is PbO2. b. the cathode is Pb. c.

Gnoma [55]

Answer:

The correct answer is option e.

Explanation:

The lead acid battery consists lead as an anode and lead oxide as a cathode. Both the electrodes are suspended in dilute sulfuric acid which act as an electrolyte.

At anode: Oxidation

$Pb(s)+SO_4^{2-}(aq)\rightarrow PbSO_4(s)+2e^-$

At cathode: Reduction

$PbO_2+SO_4^{2-}(aq)+4H^+(aq)+2e^-\rightarrow PbSO_4(s)+2H_2O$

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4 years ago

Why was the measurement unit for metal content in Experiments 1 and 2 different? In Experiment 1:

olya-2409 [2.1K]

To identify why a metal measurement was different in the experiments look for the variable that was different in the experiment and analyze how this change affected the results.

<h3>What is an experiment?</h3>

An experiment is a procedure that aims at probing or discovering something. For example, you can test if a plant grows faster/slower by using an experiment.

<h3>What causes different results in similar experiments?</h3>

The most common cause for this situation is that one of the factors or variables is slightly different. For example, if I add 50mL of water to a plant rather than 20mL of water every day this might cause different results.

Based on this, if the metal content was different you should analyze if any of the factors changed in this experiment and find out how this change affected the general results.

Note: This question is incomplete because there is limited information about the experiment; due to this, I answered it based on general knowledge.

Learn more about experiments in: brainly.com/question/13270830

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2 years ago

How can you use density to separate mixtures like sand and small plastic pellets?​

How can you use density to separate mixtures like sand and small plastic pellets?