All categories

2 years ago

See pic pls dont take a long time pls

Chemistry

2 answers:

REY [17]2 years ago

6 0

Drifte cook is right

IgorLugansk [536]2 years ago

3 0

Answer
The group of students is incorrect. Boiling water is NOT a chemical change. The group incorrectly identified it as a chemical change because the water changed to steam and bubbles.

Boiling water is a physical change to steam and bubbles but it is still water. The steam puts itself into the air as evaporation. The opposite of evaporation is condensation, when water vapor condenses back into tiny droplets of water.

A chemical change is when something changes and becomes a new substance or property, like burning wood.

A physical change is when the appearance or form of the substance changes but the kind of substance doesn’t, just like the boiling water.

You might be interested in

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

nikitadnepr [17]

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

Learn more about:

number of moles

brainly.com/question/13981579

#learnwithBrainly

6 0

3 years ago

How many grams are in 1,000 Lutheran of C2H4

Marianna [84]

Answer:

28.05316 grams

Explanation:

7 0

3 years ago

Which of the following elements are already balanced in this equation? FeS₂ + Cl₂ → FeCl₃ + S₂ Cl₂

Anuta_ua [19.1K]

Fe and S are already balanced in this equation

<h3>Further explanation</h3>

Balanced indicates that the number of elements in question has the same number of atoms both on the left side (the number on the reactants side) and on the right side (the number on the product side)

Even though one of the elements is said to be balanced, the chemical equation as a whole cannot be said to be balanced, because the chemical equation has several components of the constituent elements.

To balance chemical equations, a coefficient in front of the compound is usually added either in the reactants or products

Reaction

FeS₂ + Cl₂ → FeCl₃ + S₂Cl₂

From this equation, it can be shown that: the Fe and S elements are balanced because the numbers are equal both on the left and right, while the Cl elements are not yet balanced

Fe, left=1, right=1 ⇒ balanced

S, left=2, right=1 ⇒ balanced

Cl, left=2, right=5⇒ not balanced

For balanced equations:

2FeS₂ + 5Cl₂ → 2FeCl₃ + 2S₂Cl₂

8 0

3 years ago

What is surface tension

Dmitriy789 [7]

Surface tension is a property of the surface of a liquid that allows it to resist an external force. It is revealed, for example,
<span>in floating of some objects on the surface of water, even though they are denser than water, and in the ability of some </span>
<span>insects (e.g. water striders) and even reptiles (basilisk) to run on the water surface. This property is caused by cohesion </span>
<span>of like molecules, and is responsible for many of the behaviors of liquids..</span>

4 0

3 years ago

Read 2 more answers

Which conversion factor do you use first to calculate the number of grams of CO2 produced by the reaction of 50.6 g of CH4 with

zlopas [31]

Answer:

This is the conversion factor, we have to use:

44 g / 1mol

Explanation:

The reaction for the methane combustion is:

CH₄ + 2O₂ → CO₂ + 2H₂O

First of all we use this conversion factor to determine the moles of methane, we used.

50.6 g . 1 mol / 16 g = 3.16 mol

So ratio is 1:1, then 3.16 mol of methane will produce 3.16 moles of CO₂

To calculate the grams of produced dioxide:

3.16 mol . 44 g / 1mol = 139.04 g

5 0

3 years ago