For question 1:
A. Carbon, hydrogen, oxygen
Calcium, carbon, oxygen
Carbon, hydrogen
Carbon, hydrogen, oxygen
Silicon, oxygen
B. Carbon: 12, hydrogen: 22, oxygen: 11
Calcium: 1, Carbon: 1, oxygen: 3
Carbon:1, Hydrogen: 4
Carbon: 3, hydrogen: 8, Oxygen: 1
Silicon: 1 oxygen: 2
C. Table sugar: 45
Marble: 5
Natural gas: 5
Rubbing alcohol: 12
Glass: 3
For question 2: N2O
Answer:
wave length=speed/frequency
=365/23
wave length=speed/frequency
=365/35000
Answer:
27 liters of hydrogen gas will be formed
Explanation:
Step 1: Data given
Number of moles C = 1.03 moles
Pressure H2 = 1.0 atm
Temperature = 319 K
Step 2: The balanced equation
C +H20 → CO + H2
Step 3: Calculate moles H2
For 1 mol C we need 1 mol H2O to produce 1 mol CO an 1 mol H2
For 1.03 moles C we'll have 1.03 moles H2
Step 4: Calculate volume H2
p*V = n*R*T
⇒with p = the pressure of the H2 gas = 1.0 atm
⇒with V = the volume of H2 gas = TO BE DETERMINED
⇒with n = the number of moles H2 gas = 1.03 moles
⇒with R = the gas constant = 0.08206 L*Atm/mol*K
⇒with T = the temperature = 319 K
V = (n*R*T)/p
V = (1.03 * 0.08206 *319) / 1
V = 27 L
27 liters of hydrogen gas will be formed
The answer is D. Ne, which stands for Neon.
Answer:
The concentration of hydronium ions is 0.0155 mol/L
Explanation:
The aqueous solution ionization reaction for nitric acid is as follows;
HNO₃ + H₂O → NO₃⁻ + H₃O⁺
Whereby HNO₃ is a strong acid and it undergoes complete ionization in an aqueous solution
Hence one mole of HNO₃ produces one mole of H₃O⁺ ions
0.0155 mol/L HNO₃ will have 0.0155 moles of H₃O⁺ in one liter of the solution
The concentration of hydronium ions = 0.0155 mol/L.
