CHEMISTRY MIDDLE SCHOOL

What makes up soil besides rock particles,minerals,air,and water?

Answers

Answer 1
Answer: decayed organic material

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Heterogeneous materials are always mixtures. Are homogeneous materials always pure substances? Explain.

Answers

A homogeneous material is not always a pure substance.
For example, a solution is a homogeneous mixture, but it is not a pure substance. Salty water is homogeneous, but it is not a pure substance. There are two ingredients: salt, and water. 

¿cual es el volumen de un vaso con agua?

Answers

8 oz. o 237 ml.

Eso sí que es.

nose ni me importa solo quiero puntos perdon :v  XD

Select all of the characteristics that define matter. A.) Matter has mass. B.)Matter has volume (takes up space). C.)Atoms and compounds are made out of matter. D.) All matter has the same density.

Answers

Explanation:

Matter is defined as the substance that has mass and occupies space.

This means every matter will have mass and every matter will also have volume as it occupies space.

Every matter is made up of number of atoms as these atoms are the small sub-units that combine together and constitute a matter.

Hence, the statement atoms and compounds are made out of matter is not true.

As density is mass present in per unit volume. Therefore, every matter will vary in density.

Thus, we can conclude that characteristics that define matter are as follows.

  • Matter has mass.
  • Matter has volume (takes up space).

Answer:

The answer to your question is: a, b and c

Explanation:

A.) Matter has mass. this option is correct, matter is formed by mass.

B.)Matter has volume (takes up space). this option is correct, matter takes up space.

C.)Atoms and compounds are made out of matter. This option is correct, all atomsand compounds are made out of matter.

D.) All matter has the same density. This optio is wrong, matter of different elements or compounds have different density.

when you look at the ground, you seem to be at rest. Why is this? Why does someone in space see you moving in a circle?

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Gravitation law is the reason to it

What reactions are involved in making plastic bags and what are the molecules that make up a plastic bag like?

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Plastic bags are made up of plastic film, non-woven fabric, or plastic textile. The molecules that are present in plastic bags are polymers. Polymers are large molecules made up of repeating units called monomers.
I know this isn't much, but I hope it helps! :)

Which element melts at room temperature?

Answers

A melting element at room temperature consist of francium.

~Evie
Francium is an element that melts at room temperature. Francium is a highly reactive element, and only contains one valence electron, which is very ironic in my opinion. 
Other Questions
Hat is the structural formula for butene
Name and Title:Include your name, instructor's name, date, and name of lab.Objectives(s):In your own words, what is the purpose of this lab?Hypothesis:In this section, please include the predictions you developed during your lab activity. These statements reflect your predicted outcomes for the experiment.Procedure:The materials and procedures are listed in your virtual lab. You do not need to repeat them here. However, you should note if you experienced any errors or other factors that might affect your outcome. Using your summary questions at the end of your virtual lab activity, please clearly define the dependent and independent variables of the experiment.Data:Record the elements present in each unknown astronomical object. Be sure to indicate “yes” or “no” for each element.Hydrogen Helium Lithium Sodium Carbon NitrogenMoon One Moon Two Planet One Planet Two Conclusion:Your conclusion will include a summary of the lab results and an interpretation of the results. Please answer all questions in complete sentences using your own words.Using two to three sentences, summarize what you investigated and observed in this lab.Astronomers use a wide variety of technology to explore space and the electromagnetic spectrum; why do you believe it is essential to use many types of equipment when studying space?If carbon was the most common element found in the moons and planets, what element is missing that would make them similar to Earth? Explain why. (Hint: Think about the carbon cycle.)We know that the electromagnetic spectrum uses wavelengths and frequencies to determine a lot about outer space. How does it help us find out the make-up of stars? Why might it be useful to determine the elements that a planet or moon is made up of?
Which gas law has the assumptions of a fixed amount and volume of a gas?Boyle’s lawGay-Lussac’s lawAvogadro’s lawCharles’s lawcorrect answer is gay lussacs law
In general, what is the effect of tempature on the solubility of a gas