This tells us that in a single molecule of ammonia, there is one nitrogen atom, and three hydrogen atoms.
A)Calcium-This because calcium has two valence electrons hence it is a metal therefore it will form an ionic bond with carbon.
Answer:
the sum of the coefficients in the balanced chemical equation is 9
Explanation:
The computation of the sum of the coefficients in the balanced chemical equation is shown below:
here is the balanced chemical equation
Now the sum is
= 2 + 4 + 2 + 1
= 9
hence, the sum of the coefficients in the balanced chemical equation is 9
and, the same is to be considered
Answer: 241. 8g. Add the mass of Fe, 3 N masses (because of the 3 outside the parenthesis), and add the 9 O because of the 3 next to it and the 3 outside. This results to 55.846+42.0201+143.946g that equals 241.8g. I hope this helps
Answer:
98.68%
Explanation:
Step 1: Write the balanced equation
KBr + AgNO₃ ⇒ AgBr + KNO₃
Step 2: Calculate the moles corresponding to 814.5 mg (0.8145 g) of AgBr
The molar mass of AgBr is 187.77 g/mol.
0.8145 g × 1 mol/187.77 g = 4.338 × 10⁻³ mol
Step 3: Calculate the moles of KBr needed to produce 4.338 × 10⁻³ moles of AgBr
The molar ratio of KBr to AgBr is 1:1. The moles of KBr needed are 1/1 × 4.338 × 10⁻³ mol = 4.338 × 10⁻³ mol.
Step 4: Calculate the pure mass corresponding to 4.338 × 10⁻³ moles of KBr
The molar mass of KBr is 119.00 g/mol.
4.338 × 10⁻³ mol × 119.00 g/mol = 0.5162 g
Step 5: Calculate the purity of KBr
0.5162 g of KBr are in a 0.5231 g-sample. The purity of KBr is:
P = 0.5162 g/0.5231 g × 100% = 98.68%