Learn more about our help with Assignments: Chemistry
Search & Filtering
General Chemistry
A hundred grams of sulfuric acid yielded ten grams of water.
General Chemistry
>A solution with a total chloride ion, Cl-, concentration of 1.0 M is needed, Initially, the solution is 0.30 M in MgCl2. How many moles of solid CaCl2 must be added to 400mL of the MgCl2 solution to achieve the desired concentration of the chloride ion?</span>
General Chemistry
1. The airbag is a safety device used in cars to cushion the passenger during a crash. it involves the following chemical reaction which is triggered by an impact.
2 Na N3(s) Ã ¢ 2 Na(s) + 3 N2(g)
Calculate the volume of N2 gas (measured at STP) that can be produced from 130.0 g of Na N3 (molar mass =65).
2. The compound lithium carbonate, used to treat manic depression, has the formula of Li2CO3. Calculate the number of formula units of lithium carbonate present in a 0.500g sample of lithium carbonate.
2 Na N3(s) Ã ¢ 2 Na(s) + 3 N2(g)
Calculate the volume of N2 gas (measured at STP) that can be produced from 130.0 g of Na N3 (molar mass =65).
2. The compound lithium carbonate, used to treat manic depression, has the formula of Li2CO3. Calculate the number of formula units of lithium carbonate present in a 0.500g sample of lithium carbonate.
General Chemistry
if a cm ³ of gas costs RM1.50 , how many cents would a liter of gas cost?
General Chemistry
What is the partial pressure of each gas if the following amounts of substances are placed in a 25.0 L container at 25 °C? What is the total pressure of each mixture?
a. 1.570 mol of CH4 and 0.870 mol of COÃ ¢ b. 2.63 g of CO and 1.24 g of NO2
a. 1.570 mol of CH4 and 0.870 mol of COÃ ¢ b. 2.63 g of CO and 1.24 g of NO2
General Chemistry
After 1911, most scientists accepted the theory that the nucious of an atom was very dense and very small and had a positive charge. What led scientists to accept this theory?
General Chemistry
How many moles are their in1.12dm3 of NH3 at rtp
General Chemistry
The ph of Acetic acid and hydrochloric acid before adding the sodium hydroxide is 4.70. What is the calculation?
General Chemistry
Based on the kinetic molecular model, solids usually have higher densities compared to liquids. However, ice, a solid form of H2O floats on liquid water which means ice is less dense than water. What do you think is the reason for this phenomenon? What is the biological significance of this concept?
General Chemistry
Calculate the ΔH° for the following reaction using the information
