When 1.0 moles of solid sodium and 3.0 moles of oxygen gas are mixed, solid sodium
oxide forms...
![subject](/tpl/images/cats/himiya.png)
![ansver](/tpl/images/cats/User.png)
Answers: 2
Another question on Chemistry
![question](/tpl/images/cats/himiya.png)
Chemistry, 21.06.2019 20:30
In a laboratory experiment, a fermenting aqueous solution of glucose and yeast produces carbon dioxide gas and ethanol. the solution was heated by burning natural gas in a bunsen burner to distill the ethanol that formed in the flask. during the distillation, the ethanol evaporated and then condensed in the receiving flask. the flame of the burner was kept too close to the bottom of the flask and some of the glucose decomposed into a black carbon deposit on the inside of the flask. during this experiment the following changes occurred. which of these changes involved a physical change and not a chemical change? check all that apply. 1-condensation of ethanol 2-evaporation of ethanol 3- formation of carbon dioxide gas from glucose burning of natural gas 4-formation of ethanol from glucose by yeast 5-formation of a carbon deposit inside the flask
Answers: 2
![question](/tpl/images/cats/himiya.png)
![question](/tpl/images/cats/himiya.png)
Chemistry, 22.06.2019 18:00
Answer asap need it by wednesday morning carry out the following calculations on ph and ka of from data. i. calculate the ph of 0.02m hcl ii. calculate the ph of 0.036m naoh iii. calculate the ph of 0.36m ca(oh)2 iv. calculate the ph of 0.16m ch3cooh which has ka = 1.74 x 10-5 mol dm-3 v. calculate ka for weak acid ha which has a ph of 3.65 at 0.30m concentration vi. calculate the ka of a solution made by mixing 15.0 cm3 0.2m ha and 60.0 cm3 0.31m a-. [ph= 3.80] vii. calculate the ph of a solution made by mixing 15.0 cm3 0.1m naoh and 35.0 cm3 0.2m hcooh. [ka = 1.82 x 10-4 m]
Answers: 1
![question](/tpl/images/cats/himiya.png)
Chemistry, 22.06.2019 21:30
What is happening when the water inside a kettle heats up and begins to boil
Answers: 1
You know the right answer?
Questions
![question](/tpl/images/cats/informatica.png)
Computers and Technology, 26.07.2021 15:40
![question](/tpl/images/cats/himiya.png)
Chemistry, 26.07.2021 15:40
![question](/tpl/images/cats/mat.png)
![question](/tpl/images/cats/obshestvoznanie.png)
Social Studies, 26.07.2021 15:40
![question](/tpl/images/cats/mat.png)
![question](/tpl/images/cats/en.png)
English, 26.07.2021 15:40
![question](/tpl/images/cats/ekonomika.png)
![question](/tpl/images/cats/mat.png)
![question](/tpl/images/cats/ekonomika.png)
Business, 26.07.2021 15:40
![question](/tpl/images/cats/geografiya.png)
Geography, 26.07.2021 15:40
![question](/tpl/images/cats/biologiya.png)
![question](/tpl/images/cats/en.png)
![question](/tpl/images/cats/es.png)
![question](/tpl/images/cats/istoriya.png)
History, 26.07.2021 15:40
![question](/tpl/images/cats/mat.png)
Mathematics, 26.07.2021 15:40
![question](/tpl/images/cats/en.png)
English, 26.07.2021 15:40
![question](/tpl/images/cats/mat.png)
Mathematics, 26.07.2021 15:40
![question](/tpl/images/cats/en.png)
![question](/tpl/images/cats/fizika.png)