Calcium bicarbonate (ca(hco3)2) ca: h: c: o = 1: 2: 2 lithium sulfide (li: 2s) li: s = 2: __
<...
![subject](/tpl/images/cats/himiya.png)
![ansver](/tpl/images/cats/User.png)
Answers: 1
![](/tpl/images/ask_question.png)
![](/tpl/images/ask_question_mob.png)
Another question on Chemistry
![question](/tpl/images/cats/himiya.png)
Chemistry, 23.06.2019 03:50
Show how to convert the temperature 84.7° c to kelvin. include all steps and label the final answer
Answers: 1
![question](/tpl/images/cats/himiya.png)
Chemistry, 23.06.2019 04:31
Areaction is first order. if the initial reactant concentration is 0.0200 m, and 25.0 days later the concentration is 6.25 x 10-4 m, then its half-life is:
Answers: 1
![question](/tpl/images/cats/himiya.png)
Chemistry, 23.06.2019 05:50
What are the coefficients to balance the following equation? ba+br=babr2
Answers: 1
![question](/tpl/images/cats/himiya.png)
Chemistry, 23.06.2019 06:40
1.) which of the following is a molecule but not a compound? a.he b.f2 c.h2o d.ch4 2.) what is a physical combination of substances? a.a compound b.a molecule c.a mixture d.an element 3.) what is a chemical combination of substances? a.a compound b.an atom c.a mixture d.an element 4.) what is the relationship between the solute and solvent in a solution? a.they form a compound b.they form a mixture c.they form molecules d.they form chemical bonds 5.) the gases in air dissolve in water. what would be one way to reduce the amount of a gas dissolved in water? a.add more water b.reduce the air pressure c.increase the air pressure d.stir the water 6.) how would you determine the solubility of a substance? a.find how well it dissolved various substances. b.find the mass and the volume of the substance. c.find the temperature at which the substance evaporated. d.find how much i was able to dissolve in a solute. 7.) the periodic table organizes all of the kinds of a.molecules. b.compounds. c.atoms. d.ions. 8.)what distinguishes two substances combined to become a compound vs. two substances combined to become a mixture? a.whether they can be easily separated b.whether they chemically bond together c.whether they both are visible d.whether they are heterogeneous 9.) the principle components of air are: n2 78% o2 21% ar 0.95% co2 0.038% this is a solution of a.molecules and atoms. b.molecules. c.compounds and molecules. d.atoms.
Answers: 1
You know the right answer?
Questions
![question](/tpl/images/cats/en.png)
![question](/tpl/images/cats/es.png)
![question](/tpl/images/cats/mkx.png)
![question](/tpl/images/cats/istoriya.png)
![question](/tpl/images/cats/fizika.png)
Physics, 20.07.2019 07:30
![question](/tpl/images/cats/istoriya.png)
History, 20.07.2019 07:30
![question](/tpl/images/cats/obshestvoznanie.png)
![question](/tpl/images/cats/en.png)
![question](/tpl/images/cats/istoriya.png)
History, 20.07.2019 07:30
![question](/tpl/images/cats/health.png)
Health, 20.07.2019 07:30
![question](/tpl/images/cats/mat.png)
![question](/tpl/images/cats/en.png)
English, 20.07.2019 07:30
![question](/tpl/images/cats/mat.png)
Mathematics, 20.07.2019 07:30
![question](/tpl/images/cats/mat.png)
![question](/tpl/images/cats/himiya.png)
Chemistry, 20.07.2019 07:30
![question](/tpl/images/cats/mat.png)
![question](/tpl/images/cats/en.png)
English, 20.07.2019 07:30
![question](/tpl/images/cats/istoriya.png)
![question](/tpl/images/cats/istoriya.png)