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kotykmax [81]
3 years ago
9

The chemical reaction between iron (Fe) and oxygen (O) results in the loss of electrons from iron. This reaction is an example o

f _____.
A)oxidation
B)respiration
C)combustion
D)sublimation
Chemistry
2 answers:
Afina-wow [57]3 years ago
4 0

Your answer is C (i am only writing this part because i dont wanna explain it bla bla bla bla bla bla bla)

Shkiper50 [21]3 years ago
3 0

Answer:

The answer is C

Explanation:

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What is the molarity of a solution composed
Neporo4naja [7]

Answer:

0.0845 M

Explanation:

First we <u>convert 4.27 grams of potassium iodide into moles</u>, using its <em>molar mass</em>:

  • Molar Mass of KI = 166 g/mol
  • 4.27 g ÷ 166 g/mol = 0.0257 mol

Now we <u>calculate the molarity of the solution</u>, using <em>the number of moles and the given volume</em>:

  • Molarity = moles / liters
  • Molarity = 0.0257 mol / 0.304 L = 0.0845 M
7 0
3 years ago
Carbon burns in the presence of oxygen to give carbon dioxide. Which chemical equation describes this reaction?
Alex73 [517]
Your answer is B.
Because it says that that carbon burns in presence of oxygen (C+O) which is equal ( => ) to Carbon Dioxide (CO_{2})
3 0
4 years ago
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How many moles of oxygen atoms are present in 5 moles of Mg3(PO4)2
Irina18 [472]

How many moles of oxygen atoms are present in 5 moles of Mg3(PO4)2

All you have to do is to create a ratio between the molecule and the oxygen atom.

5 moles of Mg3(PO4)2 (4x2 moles O/1 mole Mg3(PO4)2) = 40 moles of oxygen

5 0
4 years ago
What is spectrophotometry? How can this be useful in identifying drugs?
liq [111]

Answer:

What is spectrophotometry? It is an analytic method that it use substances light absorbance property

How can this be useful in identifying drugs? It possible compare spectra and identify problem substance

Explanation:

The way substances absorb light is unique and because of that it is possible to use spectrophotometry for substances identifying. the model spectra are measured in ideal conditions, so, it is difficult ensure the same conditions and to achieve identical spectra.

I hope I have been helpful

7 0
4 years ago
The formula for calcium oxide is CaO. What are the formulas for magnesium oxide and strontium oxide?
Hunter-Best [27]

Answer:

Formula of magnesium oxide is MgO and formula of strontium oxide is SrO

Explanation:

Ca, Mg and Sr are same group bivalent metals.

Oxygen is a bivalent element

In general, formula of a compound made of a cation M^{x+} and an anion A^{y-} is M_{y}A_{x} for x\neq y

When x = y, formula of the compound becomes MA

As both these metals and oxygen are bivalent therefore formula of magnesium oxide is MgO and formula of strontium oxide is SrO.

8 0
3 years ago
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