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kvasek [131]
2 years ago
7

The ________________and ______________ of magma cause igneous rocks to form.

Chemistry
1 answer:
LekaFEV [45]2 years ago
6 0

Answer:

The solidifying/cooling and crystallizing of magma causes igneous rocks to form.

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The law of conservation of mass states that in a chemical reaction, mass is neither created nor destroyed. that means, the total
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Well all reactions need energy to start it. The light is the energy that the reaction requires to start it. Sunlight also has no mass in the first place so laws of conservation of mass don't apply to it.

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What value was there in predicting the properties for gaps in Mendeleev's table?
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helped discover elements down the line

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A beaker contains 2.06 mol of copper, and beaker b contains 222 grams of silver. which beaker contains the larger mass? which be
svet-max [94.6K]
Part (a): The masses
From the periodic table:
molar mass of copper = 63.5 grams
This means that:
mass of 2..06 moles = 2.06 * 63.5 = 130.81 grams
comparing this mass with the 222 grams of silver, we will find that the mass of silver is greater.

Part (b): The atoms:
number of moles = mass / molar mass
number of moles of silver = 222 / 107.8 = 2.059 moles
each mole contains Avogadro's number of atoms.
Since number of moles of copper is slightly larger than nuber of moles of silver, this means that the number of atoms in the copper sample would be more.
6 0
3 years ago
In the compound Al2O3, aluminum has an oxidation number of 3, while oxygen's oxidation number is ________.
Svetach [21]

Answer:

The oxidation number of Oxygen is -2.

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3 years ago
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A student decides to conduct an investigation to determine the boiling points of water and ethanol. The student will heat sample
Oxana [17]

The aspect of the experiment that is missing from the experimental design for the determination of the boiling points of water and ethanol is deciding on the appropriate equipment.

The correct option is C.

<h3>What are experiments?</h3>

Experiments are scientific procedures that are designed to test a hypothesis in order to prove or disprove the hypothesis.

Also, experiments are done to make discoveries as well as to repeat or confirm a fact.

In designing an experiment, the following components of the experimental design are necessary:

  1. determining the procedure
  2. determining what data to collect
  3. deciding on the appropriate equipment
  4. deciding on the number of trials to perform

For example, in an experiment to determine the boiling points of water and ethanol, appropriate equipment such as a thermometer is needed.

Learn more about experiments at: brainly.com/question/17274244

#SPJ1

Complete question:

A student decides to conduct an investigation to determine the boiling points of water and ethanol. The student will heat samples of water and ethanol, and measure the temperature at which the samples boil. The student will conduct the investigation three times. Which aspect is missing from the experimental design?

determining the procedure

determining what data to collect

deciding on the appropriate equipment

deciding on the number of trials to perform

8 0
11 months ago
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