Chemistry, 27.01.2022 20:30 legendman27
A certain element contains 75% of an isotope of mass number X and 25% of an isotope of mass number Y.
Select one or more:
The atomic weight of the element is closer to X than it is to Y.
The atomic weight of the element is closer to Y than it is to X.
The element is Manganese [atomic number 25].
The element is Osmium (atomic number 75).
The element is Tin [atomic number 50].
There is not enough information to tell which element is represented.
Answers: 2
Chemistry, 22.06.2019 06:00
If you burn 10 kilograms of wood in a fire (combustion) what is the weight of the products after the fire has finished burning the wood?
Answers: 3
Chemistry, 22.06.2019 21:40
Tooth enamel consists mainly of the mineral calcium hydroxyapatite, ca_10(po_4)_6(oh)_2. trace elements in teeth of archaeological specimens provide anthropologist with clues about diet and diseases of ancient people. students at hamline university measured strontium in enamel from extracted wisdom teeth by atomic absorption spectroscopy. solutions with a constant total volume of 10.0 ml contained 0.726 mg of dissolved tooth enamel plus variable concentrations of added sr. added sr find the concentration of sr in the 10 ml sample solution in parts per billion = ng/ml. find the concentration of sr in tooth enamel in parts per million = mu g/g.
Answers: 2
Chemistry, 22.06.2019 21:50
Given the data below for the reaction, 2 a + 2 b + 4 c => d + e + 3 f, the reaction is fill in the [ ] order in a, fill in the [ ] order in b, fill in the [ ] order in c and fill in the [ ] order overall. (use the words "first, second, third, fourth" to fill each blank)experimentinitial conc of a, mol/l initial conc of b, mol/l initial conc of c, mol/l initial rate, mol/l.s1 0.1 0.1 0.2 2 x 10-32 0.2 0.3 0.2 6 x 10-33 0.3 0.1 0.2 2 x 10-34 0.4 0.3 0.4 1.2 x 10-2
Answers: 2
Chemistry, 23.06.2019 00:00
Predict the relative bond lengths of the three carbon-oxygen bonds in the carbonate ion (co2−3). what would you expect the charge to be on each oxygen? match the words in the left column to the appropriate blanks in the sentences on the right. make certain each sentence is complete before submitting your answer.
Answers: 3
A certain element contains 75% of an isotope of mass number X and 25% of an isotope of mass number Y...
Mathematics, 18.03.2021 03:10
Social Studies, 18.03.2021 03:10
World Languages, 18.03.2021 03:10
Mathematics, 18.03.2021 03:10
Mathematics, 18.03.2021 03:10
Mathematics, 18.03.2021 03:10
SAT, 18.03.2021 03:10
Arts, 18.03.2021 03:10
Mathematics, 18.03.2021 03:10
Computers and Technology, 18.03.2021 03:10
Mathematics, 18.03.2021 03:10
Mathematics, 18.03.2021 03:10