Question

Cr=crcl3=cr(oh)3= cr2o3=cr

Answer 1

1) 2Cr+6HCL=2CrCl₃+3H₂

2) 2CrCl₃+3NaOH=Cr(OH)₃ + 3NaCl

3) 2Cr(OH)₃ $\frac{t}{=}$ Cr₂O₃ + 3H₂O

4) Cr₂O₃ + 2Al = Al2O3 + 2Cr

Answer 2

It seems like you've provided a list of chemical formulas related to the element chromium (Cr). However, the list contains some errors and misunderstandings. Let me clarify and correct them for you:

1. Cr: This chemical formula represents the element chromium in its elemental form.

2. CrCl3: This chemical formula represents chromium(III) chloride. It consists of one chromium ion (Cr3+) and three chloride ions (Cl-) in the compound.

3. Cr(OH)3: This chemical formula represents chromium(III) hydroxide. It consists of one chromium ion (Cr3+) and three hydroxide ions (OH-) in the compound.

4. Cr2O3: This chemical formula represents chromium(III) oxide, also known as chromic oxide. It consists of two chromium ions (Cr3+) and three oxide ions (O2-) in the compound.

It's important to note that "Cr(oh)3" is not a valid chemical formula, and it should be written as "Cr(OH)3" to indicate chromium(III) hydroxide correctly. Additionally, "cr2o3=cr" is not accurate; "Cr2O3" and "Cr" represent different chemical compounds. The former is chromium(III) oxide, while the latter represents the elemental form of chromium.

In summary, the correct chemical formulas are as follows:

• Chromium (elemental): Cr
• Chromium(III) chloride: CrCl3
• Chromium(III) hydroxide: Cr(OH)3
• Chromium(III) oxide: Cr2O3