Question

what is the chemical formula for ammonium chromate? do not use any spaces (e.g., ca3(po4)2 would be written as ca3(po4)2 with no spaces). question 6 what is the chemical formula for mercury(i) perchlorate? do not use any spaces (e.g., ca3(po4)2 would be written as ca3(po4)2 with no spaces). question 7 what is the chemical name for ca(oh)2?

Explanation:

Step1: Identify ions in ammonium chromate

Ammonium ion is $NH_4^+$ and chromate ion is $CrO_4^{2 - }$. To balance charges, we need 2 ammonium ions for 1 chromate ion.

Step2: Write chemical formula

The formula is $(NH_4)_2CrO_4$, and without spaces it is (NH4)2CrO4.

Step3: Identify ions in mercury(I) perchlorate

Mercury(I) exists as $Hg_2^{2+}$ and perchlorate ion is $ClO_4^-$. To balance charges, we need 2 perchlorate ions for 1 mercury - (I) ion.

Step4: Write chemical formula

The formula is $Hg_2(ClO_4)_2$, and without spaces it is Hg2(ClO4)2.

Step5: Name the compound Ca(OH)2

$Ca^{2+}$ is calcium ion and $OH^-$ is hydroxide ion. So the name is calcium hydroxide.

Answer:

Question 1: (NH4)2CrO4
Question 2: Hg2(ClO4)2
Question 3: calcium hydroxide