Questions tagged 'Chemistry'
452 questions
Amphetamine(C9H13N) is a weak base with a pKb of 4.2.?
To calculate the pH of a solution containing amphetamine (C9H13N) at a concentration of 240 mg/L, given that it is a weak base with a pKb of 4.2, please provide the necessary calculations.
How many molecules are present in 4.25 mol of CCl4?
I need clarification on the number of molecules present in 4.25 moles of CCl4. I have the following answer options: A) 9.26 × 10^25 B) 2.56 × 10^24 C) 653.69 D) 153.81 E) 36.91 I calculated 2.7099 ×...
Compared with 31p, the radioactive isotope 32p has a.
Compared to the radioactive isotope (^{31}\text{P}), the isotope (^{32}\text{P}) has: a. a different atomic number b. one more proton c. one more electron d. one more neutron
How many moles are there on 17.5 grams of sodium?
How many moles are present in 17.5 grams of sodium? Please provide a clear explanation of the calculation process, including any relevant formulas or constants used in determining the number of moles.
how to convert molarity to ppm???
How can I convert molarity to parts per million (ppm)? Specifically, I would like to understand the formula or method used for this conversion, as well as any factors I need to take into account, such...
Oct 27, 2024
What is the smallest particle representing water?
What is the smallest particle that represents water? Please choose one of the following options: a. hydrogen atom b. molecule c. diatomic oxygen d. oxygen atom
How does a polyatomic anion differ from a monatomic anion?
How does a polyatomic anion differ from a monatomic anion? Please provide a detailed explanation of the structural and compositional differences between these two types of anions.
Label the enthalpy changes shown in the diagram below. I need help with chemistry please.?
I need assistance with labeling the enthalpy changes depicted in the attached diagram. I have consulted my chemistry textbook for guidance, but I am still struggling to understand the concepts. Unfort...
Oct 26, 2024
If 27.0 g of MgSO4.7H2O is thoroughly heated, what mass of anhydrous magnesium sulfate will remain?
If 27.0 g of magnesium sulfate heptahydrate (MgSO4·7H2O) is thoroughly heated, what mass of anhydrous magnesium sulfate (MgSO4) will remain after the water of hydration has been eliminated?
Calculate the initial rate for the formation of c at 25 ∘c, if [a]=0.50m and [b]=0.075m.
What is the initial rate of formation for compound c at 25 °C, given the concentrations [a] = 0.50 M and [b] = 0.075 M?