![subject](/tpl/images/cats/himiya.png)
Chemistry, 02.02.2020 19:58 hurricane01
How many atoms of gold (au) are present in a sample of 2.5 mol au? a. 1.5 × 1024 atoms au b. 1.5 × 1023 atoms au c. 4.2 × 1024 atoms au d. 4.2 × 1023 atoms au
![ansver](/tpl/images/cats/User.png)
Answers: 3
![](/tpl/images/ask_question.png)
![](/tpl/images/ask_question_mob.png)
Another question on Chemistry
![question](/tpl/images/cats/himiya.png)
Chemistry, 22.06.2019 10:30
Acompound has a molar mass of 92.02 grams/mole, and its percent composition is 30.4% nitrogen (n) and 69.6% oxygen (o). what is its molecular formula? a. n2o4 b. no2 c. n2o d. n4o2
Answers: 1
![question](/tpl/images/cats/himiya.png)
Chemistry, 22.06.2019 13:30
How many protons, electrons, and neutrons are in each of the following isotopes? a. zirconium-90 b. palladium-108 c. bromine-81 d. antimony-123
Answers: 1
![question](/tpl/images/cats/himiya.png)
Chemistry, 22.06.2019 14:00
The content of manganese (mn) in steel was determined spectrophotometrically and with the use of the standard addition method. an unknown sample of mn from a digested steel sample gave an absorbance of 0.185 when analyzed spectrophotometrically. when 5.00 ml of solution containing 95.5 ppm mn was added to 50.0 ml of the unknown steel solution (digested sample), the absorbance was 0.248. calculate the concentration, in parts-per-million (ppm), of mn in the digested steel sample solution.
Answers: 3
![question](/tpl/images/cats/himiya.png)
Chemistry, 22.06.2019 15:30
Using the first volume and temperature reading on the table as v1 and t1, solve for the unknown values in the table below. remember to use the rules of significant figures when entering your numeric response.
Answers: 2
You know the right answer?
How many atoms of gold (au) are present in a sample of 2.5 mol au? a. 1.5 × 1024 atoms au b. 1.5 ×...
Questions
![question](/tpl/images/cats/mat.png)
Mathematics, 12.11.2020 21:20
![question](/tpl/images/cats/mat.png)
![question](/tpl/images/cats/istoriya.png)
History, 12.11.2020 21:20
![question](/tpl/images/cats/istoriya.png)
![question](/tpl/images/cats/mat.png)
Mathematics, 12.11.2020 21:20
![question](/tpl/images/cats/en.png)
![question](/tpl/images/cats/en.png)
![question](/tpl/images/cats/mat.png)
Mathematics, 12.11.2020 21:20
![question](/tpl/images/cats/User.png)
Engineering, 12.11.2020 21:20
![question](/tpl/images/cats/informatica.png)
Computers and Technology, 12.11.2020 21:20
![question](/tpl/images/cats/mat.png)
Mathematics, 12.11.2020 21:20
![question](/tpl/images/cats/mkx.png)
Arts, 12.11.2020 21:20
![question](/tpl/images/cats/himiya.png)
![question](/tpl/images/cats/en.png)
![question](/tpl/images/cats/mat.png)
![question](/tpl/images/cats/mat.png)
Mathematics, 12.11.2020 21:20
![question](/tpl/images/cats/es.png)
Spanish, 12.11.2020 21:20
![question](/tpl/images/cats/mat.png)
![question](/tpl/images/cats/mat.png)
Mathematics, 12.11.2020 21:20