Asolution of hno3 is standardized by reaction with pure sodium carbonate. 2h++na2co3⟶2na++h2o+co2 a volume of 26.80±0.05 ml of hno3 solution was required for complete reaction with 0.9369±0.0009 g of na2co3 , (fm 105.988±0.001 g/mol ). find the molarity of the hno3 solution and its absolute uncertainty g

*will mark you brainliest + 15 points ** why does the equilibrium of a system shift when the pressure is increased? a. to maximize the stress on the system b. to stop restoring equilibrium to the system c. to increase the total moles of gas in the system d. to decrease the total moles of gas in the system

Three cards with holes are arranged in a straight line. a light is shined through the first card’s hole and travels through all three cards. what does this tell you about light rays? a) that light is reflected b) that light is refractive c) that light travels in a straight line d) that light does not travel in a straight line

How many absorptions would you expect to observe in the 13c nmr spectra of the following molecules? a) 3-chloropentane b) cis-4-methyl-2-pentene