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777dan777 [17]
3 years ago
8

PLS HELP What is one of the benefits that scientists have discovered from organisms' daily exposure to radioisotopes? 1, being a

ble to Carbon date fossils 2. X-ray Imaging capability 3. invention of microwave cooking
Chemistry
2 answers:
True [87]3 years ago
5 0
Being able to carbon date fossils
77julia77 [94]3 years ago
4 0

Answer:

The correct answer is option 1, that is, being able to carbon date fossils.

Explanation:

With the help of daily exposure to radioisotopes of the organisms, the scientists have found the concept of carbon date fossils. The age of the organic matter can be found from the relative ratios of C-12 and C-14, that is, the isotopes of carbon with the application of carbon dating. This proportion modifies over the years as carbon-14 decays and does not get replaced as there is no exchange with the atmosphere.

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The dark areas on the world map show places with climates that are alike. The table shows information for those places. A
vlabodo [156]

Answer:

Choice B

They are polar climates because they are dry

and cold

6 0
2 years ago
Can you guys help me with 8&9 THANK YOUU
zlopas [31]
number 8 the list is hydrogen,magnesium,silicon and oxygen and there are 4elements
8 0
3 years ago
What is the balanced NET ionic equation for the reaction when aqueous Cs₃PO₄ and aqueous AgNO₃ are mixed in solution to form sol
rusak2 [61]

Answer:

PO_4^{3-}(aq)+3Ag^+(aq)\rightarrow Ag_3PO_4(s)

Explanation:

Hello!

In this case, since the net ionic equation of a chemical reaction shows up the ionic species that result from the simplification of the spectator ions, which are those at both reactants and products sides, we take into account that aqueous species ionize into ions whereas liquid, solid and gas species remain unionized. In such a way, for the reaction of cesium phosphate and silver nitrate we can write the complete molecular equation:

Cs_3PO_4(aq)+3AgNO_3(aq)\rightarrow Ag_3PO_4(s)+3CsNO_3(aq)

Whereas the three aqueous salts are ionized in order to write the following complete ionic equation:

3Cs^+(aq)+PO_4^{3-}(aq)+3Ag^+(aq)+3NO_3^-(aq)\rightarrow Ag_3PO_4(s)+3Cs^+(aq)+3NO_3^-(aq)

In such a way, since the cesium and nitrate ions are the spectator ions because of the aforementioned, the net ionic equation turns out:

PO_4^{3-}(aq)+3Ag^+(aq)\rightarrow Ag_3PO_4(s)

Best regards!

7 0
2 years ago
Help??
kvasek [131]

Answer:

Mass of sodium chloride decomposed = 24.54 g

Explanation:

Given data:

Mass of sodium chloride decomposed = ?

Mass of chlorine gas formed = 15 g

Solution:

Chemical equation:

2NaCl      →         2Na + Cl₂

Number of moles of Cl₂:

Number of moles = mass/molar mass

Number of moles = 15 g/ 71 g/mol

Number of moles = 0.21 mol

Now we will compare the moles of Cl₂ with NaCl from balance chemical equation.

                    Cl₂            :              NaCl

                      1              :                2

                      0.21         :            2×0.21 = 0.42 mol

Mass of Sodium chloride decompose:

Mass = number of moles × molar mass

Mass = 0.42 mol × 58.44 g/mol

Mass = 24.54 g

4 0
3 years ago
The theory of plate tectonics describes the movement of continental plates across the Earth's surface as if they were riding on
emmainna [20.7K]

Answer:

B and E

Explanation:

These two options support the theory of plate tectonics.

3 0
3 years ago
Read 2 more answers
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