Paul placed an ice cube into a beaker on a hot plate. The ice cube changed from a solid to a liquid and then to a gas. During this process, which property of the ice cube remained unchanged

Answers

Answer 1

Answer: The fact that the ice cube was water/H2O did not change:

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2FeCl3 + MgO -> Fe2O3 + 3MgCl2
Convert 3.00 moles of MgO to moles of Fe2O3

Answers

71.8 g of iron (III) oxide (Fe₂O₃) were produced from 3 moles of magnesium oxide (MgO).

Explanation:

We have the following chemical reaction:

2 FeCl₃ + 3 MgO → Fe₂O₃ + 3 MgCl₂

We see from the chemical reaction that 3 moles of magnesium oxide (MgO) will produce 1 mole of iron (III) oxide (Fe₂O₃).

number of moles = mass / molar weight

mass = number of moles × molar weight

mass of Fe₂O₃ = 1 × 71.8 = 71.8 g

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number of moles

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What is a magnetic reversal

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A change in the Earth's magnetic field resulting in the magnetic north being aligned with the geographic south, and the magnetic south being aligned with the geographic north. Also called geomagnetic reversal.

Convert 43.0 grams of SiH4 to moles

Answers

The number of moles in the 4.30 g of SiH₄ is 1.338 moles.

What are moles?

The mole is a SI unit of measurement that is used to calculate the quantity of any substance.

To calculate the moles

The molar mass of SiH₄ is 32.12 g

The mass of SiH₄ is 43.0 g

$\rm Number\;of \;moles= (mass)/(molar\;mass)\n\n\rm Number\;of \;moles= (43.0)/(32.12) = 1.338\; mol$

Thus, the number of moles in the 4.30 g of SiH₄ is 1.338 moles.

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43.0 grams of SiH4 converts to 1.338 moles.

What takes longer to melt a small quantity or a large quantity?

Answers

Answer:

A large quantity

Explanation:

A large quantity will take much longer to melt compared to a small quantity of the same matter.

The rate of melt of a substance is particularly a function of the nature of the substance and the amount of energy supplied to it.

If we assume that we are dealing with different quantities of the same substance, then the one that has more mass will melt faster because less energy would be required to change its state.

A large quantity of matter will take more time to melt.

Over a long period of time, a group of people were exposed to high degrees of UV radiation from the sun. While no one became sick immediately, doctors did predict that those exposed had an increased risk of cancer in skin cells. Which type of mutation will this exposure cause? A. acquired, harmful B. acquired, neutral C. inherited, beneficial D. inherited, neutral

Answers

Answer:

acquired/harmful

Explanation:

This type of mutation and exposure will cause indefinite problems.

A. because they did not inherit cancer from their family they accuired it from the sun and cancer is harmfull so its A.

How do you do these questions??Please help me!!

Answers

So basically A goes to U, G goes to C, C goes to G, and U goes to A. So for example, the first one is phen.(A A G). You would take the opposites of these numbers as explained before. So the mRNA of that sequence would be UUC.

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