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beks73 [17]
2 years ago
9

Jason noticed that his flashlight stopped working. He solved the problem by using the scientific method. Arrange the steps he fo

llowed in the correct order in the flowchart.
1.He suspects that the batteries could be dead.


2.He notices that his flashlight stopped working.


3.He replaces the batteries in the flashlight with new batteries.


4.His flashlight works again.He writes a note to himself to buy extra batteries.
Chemistry
2 answers:
Alika [10]2 years ago
5 0

Answer:the answer is 2. he noticed that his flashlight stopped working

1. he suspected that the batteries could be dead

3. he replaces the batteries in the flashlight with new batteries

4.his flashlight works again. he writes a note to himself to buy extra batteries

Explanation:

gulaghasi [49]2 years ago
4 0
The first part of the scientific method is the observation. Therefore, 2. is the first step.

The second step is the hypothesis. Therefore, 1. is next.

The third step is the experiment. Therefore, 3. is next.

The final step is the conclusion. Therefore, 4. is last.

The order is:
2.
1.
3.
4.
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Write an equation between the carbonate and the acid​
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Answer:

In general an acid reacts with a carbonate or hydrogen-carbonate to produce a salt, carbon dioxide gas and water.

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2 years ago
One of the reactions that occurs in a blast furnace, in which iron ore is converted to cast iron, is Fe2O3 + 3CO → 2Fe + 3CO2 Su
solong [7]

Answer:

89.55~\%~of~Fe_2O_3~in~the~sample

Explanation:

The first step in this reaction is the<u> converstion from Kg</u> of Fe <u>to</u>  <u>grams</u> of Fe_2O_3.

1.19x10^3~Kg~Fe~\frac{1000g~Fe}{1~Kg~Fe}~\frac{1~mol~Fe}{55.84~g~Fe}~\frac{1~mol~Fe_2O_3}{2~mol~Fe}~\frac{159.68~g~Fe_2O_3}{1~mol~Fe_2O_3}~\frac{1~Kg~Fe_2O_3}{1000~g~Fe_2O_3}

X~=~1.7x10^3~Kg~Fe_2O_3

Then we can calculate the <u>percentage</u> of  Fe_2O_3 in the sample:

\%~Fe_2O_3~=~\frac{1.7x10^3~Kg~Fe_2O_3}{1.9x10^3~Kg~Sample}*100

89.55~\%~of~Fe_2O_3~in~the~sample

3 0
3 years ago
Pls help!<br> the chemical that is responsible for stopping reaction is called the ____
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Answer:

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8 0
2 years ago
How many molecules are present in 187 grams of XeF4
PtichkaEL [24]

There are 5.43 x 10²³ present in  187 grams of XeF₄

<h3>Further explanation  </h3>

The mole is the number of particles(molecules, atoms, ions) contained in a substance  

1 mol = 6.02.10²³ particles

Can be formulated

N=n x No

N = number of particles

n = mol

No = Avogadro's = 6.02.10²³

Moles can also be determined from the amount of substance mass and its molar mass

\tt n(mol)=\dfrac{mass(m)}{MW}

mass of XeF₄ = 187 g

mol XeF₄ (MW=207,2836 g/mol) :

\tt mol=\dfrac{187}{207,2836 g/mol}=0.902

Number of molecules :

\tt N=0.902\times 6.02\times 10^{23}\\\\N=5.43\times 10^{23}

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3 years ago
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