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3 years ago

What are two chemical properties of chromium? Please?

2 answers:

8 0

Chromium is a fairly active metal. It does not react with water, but reacts with most acids. It combines with oxygen at room temperature to form chromium oxide (Cr 2 O 3 ). Chromium oxide forms a thin layer on the surface of the metal, protecting it from further corrosion (rusting).

noname [10]3 years ago

7 0

It's brittle and hard..........

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When solving a problem it is important to identify your given and needed units, but it is also important to understand the relat

Angelina_Jolie [31]

Answer:

The question has some details missing. here are the details ; Given the following ;

1. 43.2 g of tablet with 20 cm3 of space

2. 5 cm3 of tablets weighs 10.8 g

3. 5 g of balsa wood with density 0.16 g/cm3

4. 150 g of iron. With density 79g/cm 3

5. 32 cm3 sample of gold with density 19.3 g/cm3

6. 18 ml of cooking oil with density 0.92 g/ml

Explanation:

Appropriate for calculating mass

32 cm3 sample of gold with density 19.3 g/cm3

18 ml of cooking oil with density 0.92 g/ml

Appropriate for calculating volume

5 g of balsa wood with density 0.16 g/cm3

150 g of iron. With density 79g/cm 3

Appropriate for calculating density

43.2 g of tablet with 20 cm3 of space

5 cm3 of tablets weighs 10.8 g

3 0

3 years ago

explain how a metal with one valence electron compares with a metal with more than one valence electron

slamgirl [31]

Explanation:

A metal with one valence electron is highly reactive compared to those with more than one electron.

Atoms including those of metals reacts in order attain a stable electronic configuration just like those of noble gases.

An atom with one valence electron have just one electron in its valence shell.

Metals generally have large sizes.
when the electron in this shell is lost, the metal atom can then attain stability.
therefore, such atom will quickly want to combine with any other willing to accept the electron so that they can be stable.
Those with more than one electron will find it difficult to lose them.
It requires huge energy to remove such electrons compared to the ones with only one valence electron.

learn more:

Valence electrons brainly.com/question/3023499

#learnwithBrainly

7 0

3 years ago

Steel is an alloy consisting of Fe with a small amount of C. Elemental Cr can be added to steel to make the steel less likely to

Yakvenalex [24]

The statement is true

8 0

3 years ago

15 points will mark brainliest

AfilCa [17]

Part B question 1 Answer: C
that’s the on that makes most sense

6 0

3 years ago

Read 2 more answers

If 28 ml of 5.8 m h2so4 was spilled, what is the minimum mass of nahco3 that must be added to the spill to neutralize the acid?

ipn [44]

First we have to refer to the reaction between the acid and the base: 

H2SO4 + 2 NaHCO3 ---> 2 H2O + 2 CO2 + Na2SO4

From this balanced equation we can see that for every 1 mol of acid (H2SO4), we need 2 mol of base (NaHCO3) to neutralize it. Given 28 ml of 5.8 M acid, we need to find out how many mols of acid that is:

28mL * (1L/1000mL) * 5.8 mol/L = 0.1624 mol H2SO4

Since we need 2 mol of base per mol of acid, we need:

2*0.1624 mol = 0.3248 mol NaHCO3 

MolarMass of NaHCO3 is 84.01 g/mol

0.3248 mol*(84.01g/mol) = 27.29 g NaHCO3

3 0

2 years ago

Read 2 more answers