Search & Filtering
- What volume (mL) of 0.70 M Sodium hydroxide (NaOH) is needed to neutralize 270 mL of 0.40 M Sulfuric acid (H2SO4)?
2 NaOH + H2SO4 Na2SO4 + 2 H2O
Compare the density of CO2 at 0 o C and 380 torr with its density at STP
Predict the formula of the ionic compounds formed by the following elements.
Li and K
Be and Cl
Li and Se
Mg and F
Na and N
When lead(ii) nitrate is heated it decomposes according to the reaction 2Pb(NO3)2 ==> 2PbO +4NO2 + 02. Calculate the mass of lead(ii) nitrate needed to produce 5.0g of oxygen.
cloudy mixture is one of the description of suspension
true or false
cloudy mixtures is one of the descriptions of suspension
What is the mass of one Calcium (Ca) atom? (Atomic mass of Ca = 40.08, NA =
6.022 * 1023)?
A mass of 8.52 g of nitrogen gas is collected over water at a barometric pressure of 752 mm Hg and a temperature of 26.0°C. At this temperature, PH2O = 25.2 mm Hg. What volume of nitrogen is collected?
What current is required to plate out 1.22g of Ni from q solution of Ni2+ in one hour? Atomic mass of Ni = 58.69 g/mole
Suppose that the spin quantum number could only have allowed values of –1/2, 0, and +1/2 and assuming that the rules governing the values of the other quantum numbers and the order of filling sublevels were unchanged. What would be the electron configuration of the element with an atomic number of 17?
