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Alex787 [66]
3 years ago
15

Which is a chemical property of iron?

Chemistry
2 answers:
Marta_Voda [28]3 years ago
7 0
I believe it would be the first option. It forms iron oxide (rust) when exposed to moisture and air.
AleksAgata [21]3 years ago
7 0

The answer is A, It forms iron oxide (rust) when exposed to moisture and air. Every other option describes a physical property of iron.


I hope this helped xoxox

- Lauren

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What is the primary reason that atomic radius decreases as you move from left to right across the periodic table even through th
Anika [276]

Answer:

As you move across a period the electrons are being added to the same shell. But, protons are being added as well. This makes the nucleus more positively charged and, increasing protons has a greater effect than electrons. So, there is a greater nuclear attraction and, because the electrons are being added to the same shell that shell gets pulled in more. This causes a decrease in atomic radius.

Explanation:

5 0
3 years ago
Perform the following
Marianna [84]

Answer:

167.980.

Explanation:

Hello!

In this case, since additions involving the display of the result with the appropriate number of significant figures involve the solution of the system without looking at them:

156.325 +11.65498 =167.97998

Considering that 156.325 is significant to the thousandths and 11.65498 to the hundred thousandths, we infer that the result should be taken to the thousandths as well as 156.325; thus, we obtain:

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Because the second decimal nine is rounded to ten and therefore the 7 is taken to 8.

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3 years ago
How many water molecules are in a block of ice containing 0.500 mol of water (H2O)?
Alex Ar [27]

Answer:

3.01 × 10²³ molecules

Explanation:

Step 1: Given data

Moles of water (n): 0.500 mol

Step 2: Calculate the molecules of water present in 0.500 moles of water

In order to perform this calculation, we will use the Avogadro's number: in 1 mole of water there are 6.02 × 10²³ molecules of water.

0.500 mol × (6.02 × 10²³ molecules/1 mol) = 3.01 × 10²³ molecules

8 0
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How many outer electrons does cesium and magnesium have?
Tanzania [10]
The outer electrons of an element are called the valence electrons. They help make an element stable.

Cesium : 1 valence electron<span>.

Magnesium : 2 valence electrons</span>
6 0
3 years ago
4. Explain how radioactive isotopes are used to detect health problems.
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Radioisotopes are widely used to diagnose disease and as effective treatment tools. For diagnosis, the isotope is administered and then located in the body using a scanner of some sort.
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3 years ago
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