is this loki on fairy tail because with blond hair and with glasses or without glasses (he has no glasses anymore)

Can someone tell me what is an ore?

viktelen [127]

Naturally occurring solid material from which a metal or valuable mineral can be extracted profitably.

3 0

3 years ago

Need Help with these 2. Will give Brainliest!!

Klio2033 [76]

Answer:

1. b

2. a

Explanation:

1. The density of an object represents the mass per unit volume of the object. A density of 0.45 g/mL means that 1 mL of the object weighs 0.45 g, 1.000 g/mL means 1 mL weighs 1 g, etc.

<u>A density of 35,885 g/mL means that 1 mL of the object weighs 35,885 g. This is a ridiculously high amount of weight for an object with a volume of 1 mL and seems not reasonable. It is highly unlikely that such a substance exists in nature.</u>

2. <u>Considering the fact that only rock would sink in water of all the substances from a - d, it thus means that rock would have the greatest density.</u> Oil, oxygen, and ice will all float on water, meaning that they are less dense than water.

8 0

3 years ago

PLEASE HELP : Craft the correct formulas of the following pairings using correct oxidation numbers (from round 1). Remember that

finlep [7]

Compounds provided below

$\\ \tt\hookrightarrow Al(OH)_3$

$\\ \tt\hookrightarrow KCl$

$\\ \tt\hookrightarrow Ag_2S$ (AgS also possible but unstable)

$\\ \tt\hookrightarrow Ca(CH_3COO)_2$

$\\ \tt\hookrightarrow (NH_4)_2CO_3$

$\\ \tt\hookrightarrow Fe(PO_4)_2$

$\\ \tt\hookrightarrow Na_2O$

$\\ \tt\hookrightarrow Pb(CrO_7)_4$

5 0

2 years ago

Methane and oxygen react to form carbon dioxide and water. what mass of water is formed if 0.80 g of methane reacts with 3.2 g o

Charra [1.4K]

1.8 g

<h3>Further explanation</h3>

<u>Given:</u>

0.80 g of methane reacts with 3.2 g of oxygen to produce 2.2 g of carbon dioxide.

<u>Question:</u>

What mass of water is formed?

<u>The Process:</u>

Methane and oxygen react to form carbon dioxide and water. Remember this, the chemical activity that uses oxygen to produce light and heat is also called the combustion process.

In any chemical reaction, the sum of the masses of the reactants is equal to the sum of the masses of the products. That's right, this is called conservation of the masses.

Let us write the word equation of the chemical reaction and then solve the problem following the law of the conservation of mass.

$\boxed{ \ Methane + Oxygen \rightarrow Carbon \ dioxide + Water\ }$

$\boxed{ \ 0.80 \ g \ + \ 3.2 \ g \rightarrow 2.2 \ g \ + \ m_{Water}? \ }$

$\boxed{ \ m_{reactants} = m_{products} \ }$

$\boxed{ \ 0.80 \ g \ + \ 3.2 \ g = 2.2 \ g \ + \ m_{Water} \ }$

Rewrite by rearranging as follows:

$\boxed{ \ 2.2 \ g \ + \ m_{Water} = 0.80 \ g \ + \ 3.2 \ g \ }$

$\boxed{ \ 2.2 \ g \ + \ m_{Water} = 4.0 \ g \ }$

$\boxed{ \ m_{Water} = 4.0 \ g - 2.2 \ g \ }$

Thus the mass of water formed is 1.8 g.

The balanced equation with state symbols is:

$\boxed{ \ CH_4_{(g)} + 2O_2_{(g)} \rightarrow CO_2_{(g)} + 2H_2O_{(l)} \ }$

<u>Notes:</u>

The French scientist Antoine Laurent Lavoisier represented his essential contribution by declaring the law of conservation of mass as one of the fundamental laws in chemistry.
The law of the conservation of the mass states that in a chemical reaction the sum of the masses of the reactants is equal to the sum of the masses of the products. $\boxed{\boxed{ \ m_{reactants} = m_{products} \ }}$

<h3>Learn more</h3>

Flammability as one of the chemical properties brainly.com/question/1767022
Carbon atoms can form four covalent bonds brainly.com/question/3064597
About the solution as a homogeneous mixture brainly.com/question/637791

Keywords: methane and oxygen, react to form carbon dioxide and water, combustion, to produce, the conservation of mass, the word equation, the balanced equation, Lavoisier

3 0

3 years ago

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How does a best fit line take into account errors in reading and recording data from the experiment?

marin [14]

Answer:

Answer below!

Explanation: Mean -- add all of the values and divide by the total number of data points.

Error -- subtract the theoretical value (usually the number the professor has as the target value) from your experimental data point.

Percent error -- take the absolute value of the error divided by the theoretical value, then multiply by 100

7 0

3 years ago

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