Answer:
The answer is D
Explanation:
I recently took a test with the same question and it said the answer was correct
I hope this helps and have a nice day <3
Answer:
C₂O₂
Explanation:
Step 1: Given data
- Molar mass of the molecular formula: 56 g/mol
Step 2: Calculate the molar mass of the empirical formula
M(CO) = 1 × M(C) + 1 × M(O) = 1 × 12 g/mol + 1 × 16 g/mol = 28 g/mol
Step 3: Calculate "n"
We will use the following expression.
n = molar mass of molecular formula / molar mass of empirical formula
n = (56 g/mol) / (28 g/mol) = 2
The molecular formula is:
CO × n = CO × 2 = C₂O₂
Answer:
2.67g of NH4Cl are required
Explanation:
Molarity is an unit of concentration in chemistry defined as the moles of solute (In this case, NH4Cl), per liter of solution.
To prepare 100mL of a 0.50M are required:
100mL = 0.100L * (0.50 moles / L) = 0.0500 moles NH4Cl
As molar mass of NH4Cl is 53.491g/mol:
0.0500 moles * (53.491g / mol) =
<h3>2.67g of NH4Cl are required</h3>
Zn(s) + HCl(aq)→ ZnCl (aq) +H2 (g) the combination that will affect the rate of reaction is
Temperature, concentration and surface area (answer A)
If Zn(s) is broken into powder the surface area increases leading to speeding up the rate of reaction. When the concentration of the of dissolved reactant is increased the rate of reaction increases. An increase in temperature led to increase in movement of particle and more collision happen hence the rate of reaction is increased.