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wlad13 [49]
3 years ago
6

Please help it is very easy and hard for me to figure out where the words go will give brainliest !!! And this isn't even chemis

try it's the only science option so..

Chemistry
1 answer:
GrogVix [38]3 years ago
8 0

Answer:

In the explanation

Explanation:

First of all, make sure you re-read the lesson carefully and memorize the definitions. pls

forces are push and pull.

And just give an example of like someone pushing a sofa into the living room (push).

Another example of pull is pulling a door knob to open a door.

And ANOTHER example can be pushing a tissue box or anything.

Forces can be balanced and unbalanced, that is correct.

When the netforce is equal to 0 then it is balanced, if not then it’s unbalanced.

Balanced which results a netforce equals to 0, there is no change in motion.

Unbalanced which causes in the object's motion changing (For example an tug of war, some guy pulls 10N to the right and the other person 5N to the left, obviously the netforce will be 5N to the right; Unbalanced force)

Last two boxes, maybe add examples as I mentioned? And add another example from ur textbook or something.

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11 electrons , 11 protons , 12 neutrons.
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In ironmaking, iron metal can be separated from iron ore (Fe2O3) by heating the ore in a blast furnace in the presence of coke,
mel-nik [20]

The limiting reactant is iron ore, the theoretical yield of iron metal is 701.344 kg, and the theoretical yield of carbon dioxide is 413.292 kg.

<h3>Stoichiometric problem</h3>

From the equation of the reaction:

2 Fe_2O_3(s) + 3 C(s) --- > 4 Fe(s) + 3 CO_2(g)

The mole ratio of iron ore to carbon is 2:3.

Mole of 1000 kg of iron ore = 1000000/159.69

                                          = 6,262 moles

Mole of 120 kg carbon = 120000/12

                                 = 10,000 moles

Thus, it appears that the carbon is in excess while the iron ore is limited in availability.

The mole ratio of the iron ore and the iron produced is 1:2. Thus, the equivalent number of moles of iron produced will be:

              6,262 x 2 = 12,524 moles

Mass of 12,524 moles of iron = 12,524 x 56

                                                = 701,344 g or 701.344 kg

Thus, the theoretical yield of iron is 701.344 kg.

The mole ratio of the iron ore and the carbon dioxide produced is 2:3. The equivalent mole of carbon dioxide produced will be:

         6,262 x 3/2 = 9,393 moles

Mass of 9,393 moles carbon dioxide = 9,393 x 44

                                                         = 413,292 or 413.292 kg

The theoretical yield of carbon dioxide is, therefore, 413.292 kg.

More on stoichiometric problems can be found here: brainly.com/question/14465605

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3 0
2 years ago
The reaction 2no2 ? 2no + o2 follows second-order kinetics. at 300 °c, [no2] drops from 0.0100 m to 0.00650 m in 100.0 s. the ra
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For a second order kinetics, the reaction rate expression would be

-r = -dCa / dt = kCa^2    where k is the reaction constant and Ca is the concentration of reactant A.

Integrating this from Cao to Caf, will have the expression,

1/Caf - 1/Cao = kt

Substituting the given values and calculating for k,

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3 years ago
Blake is eliminating contributing factors to ensure accuracy in his results. Which step of the scientific method is he performin
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C

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Calculate the number of moles of solute present and the number of grams
nekit [7.7K]

Answer:

The answer is: 18 moles and 1341, 72 grams of KCl

Explanation:

The molarity is defined as the moles of solute ( in this case KCl) in 1 liter of solution:

1L solution-----3 moles of KCl

6L solution-----x= (6L solutionx 3 moles of KCl)/1 L solution= <em>18 moles of KCl</em>

<em></em>

We calculate the weight of 1 mol of KCl:

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1 mol KCl----- 74, 54 g

18 mol KCl----x= (18 mol KCl x 74, 54 g)/1 mol KCl=<em>1341, 72 g</em>

6 0
4 years ago
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