Chemistry, 12.10.2019 01:20 itsdeevv

The concentration of pb²⁺ in a sample of wastewater is to be determined by using gravimetric analysis. to a 100.0-ml sample of the wastewater is added an excess of sodium carbonate, forming the insoluble lead (ii) carbonate (267 g/mol) according to the balanced equation given below. the solid lead (ii) carbonate is dried, and its mass is measured to be 0.1443 g. what was the concentration of pb²⁺ in the original wastewater sample? pb²⁺(aq) + na₂co₃(aq) -> pbco₃(s) + 2na⁺(aq)

Answers: 2

Show answers

Another question on Chemistry

Chemistry, 21.06.2019 17:00

This line graph compares the growth of plants that were kept in the sun for different amounts of time.a) on day 7, the plants kept in the sun for 3 hours were how tall? b) on day 7, the plants kept in the sun for 6 hours were how tall? c) on day 10, the plants kept in the sun for 9 hours were how tall? d) on day 11, the plant that was grown with 1 hour of sunlight was how tall? e) based on the graph, the plant grows best in what amount of sunlight?

Answers: 1

Answer

Chemistry, 22.06.2019 09:10

Select the correct answer from each drop-down menu.describe what happens to a carbon-11 atom when it undergoes positron emission.the decay of a carbon-11 atom _1_, and this causes it to emit _2_.options for 1: > changes a neutron into a proton> changes a proton into a neutron> is hit with a neutron> reconfigures its protons and neutronsoptions for 2: > a negatively charged electron-sized particle> a positively charged election-sized particle> two atoms and several neutrons> two neutrons and two protons

Answers: 3

Answer

Chemistry, 22.06.2019 10:30

What woukd most likely be the transmittance at a 0.70 m solution of solute a? a) 7.6%b) 1.1%c)4.0%d)4.6%

Answers: 1

Answer

Chemistry, 22.06.2019 15:30

Plz me ! 1 which of earths spheres contains most of its mass? a atmosphere b hydrosphere c geosphere* d biosphere 2 erosion and weathering are examples of which types of forces? a constructive forces b destructive forces* c gravitational forces d inertia-related forces 3 which of the following statements about earths atmosphere is true? a earths atmosphere contains 78% water vapor which is essentail to life b earths atmosphere contains 21% oxygen c earths atmosphere contains carbon dioxide which all life forms require d earths atmosphere allows radiation from the sun to pass through it and warm earths surface* 4 the strenght of the force of gravity between two objects is determined by which of the following factors? select all that apply a the messes of the objects* b the distance between the objects* c the volumes of the objects d the surface area of the objects 5 earth and moon are kept in there respective orbits due to the influence of a inertia b gravity c gravity and inertia* d neither gravity or inertia if you answer all questions right i will give

Answers: 1

Answer

You know the right answer?

The concentration of pb²⁺ in a sample of wastewater is to be determined by using gravimetric analysi...

Questions