The appropriate initial step when you design an experiment is number (2). It is doing research about the problem utilizing information from different reliable sources. Among all the choices, this is the first step that should be done because you have to know everything about the problem first before the other 3 steps are done.
The reaction in which two reacting molecules exchange their partner ions in aqueous solution and form two new compounds.
Answer: A. 1,1,1
Explanation:
The coefficients that will balance the equation; NH4OH(aq) →H2O(l) + NH3(g), is 1, 1, 1, because it proves the total number of atoms of each element on the LHS and RHS of the equation are equal, hence balanced.
LHS RHS
N = 1 1
H = 5 5
O = 1 1
Chlorine-36 has been widely used for dating old groundwater.
Answer: There are 105 grams of acetylene in the tank.
Explanation:
According to ideal gas equation:
P = pressure of gas = 1.39 atm
V = volume of gas = 70.0 L
n = number of moles = ?
R = gas constant =
T = temperature of gas in Kelvin =
Mass of ethylene , M = Moles × Molar mass = 4.04 mole × 26 g/mol =105g
Thus there are 105 grams of acetylene in the tank.