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bonufazy [111]
3 years ago
14

Help me please I really need this tomorrow

Chemistry
2 answers:
scoundrel [369]3 years ago
6 0

<u>9.</u><u>D</u>

<u>10.</u><u>A</u>

<u>11.</u><u>C</u>

<u>12.</u><u>B</u>

<u>13.</u><u>D</u>

<u>14.</u><u>C</u>

<u>15.</u><u>A</u>

<u>16.</u><u>A</u>

<u>18.</u><u>C</u>

jok3333 [9.3K]3 years ago
3 0

9. melting point

10. balloons float because they are filled with hydrogen, a gas which is less dense than air.

11. specific gravity

12. element

13. mixture

14. sodium and chlorine

15. cutting of paper

16. condensation

17. 1 and 3

18. heat energy is released

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3 years ago
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How many grams of CuF2 are needed to make a 2.8 M solution
11111nata11111 [884]
Molarity is given as,

                              Molarity  =  Moles / Volume of Solution  ----- (1)

Also, Moles is given as,

                              Moles  =  Mass / M.mass

Substituting value of moles in eq. 1,

                              Molarity  =  Mass / M.mass × Volume

Solving for Mass,

                              Mass  =  Molarity × M.mass × Volume  ---- (2)

Data Given;

                  Molarity  =  2.8 mol.L⁻¹

                  M.mass  =  101.5 g.mol⁻¹

                  Volume  =  1 L (I have assumed it because it is not given)

Putting values in eq. 2,

                              Mass  =  2.8 mol.L⁻¹ × 101.5 g.mol⁻¹ × 1 L

                              Mass  =  284.2 g of CuF₂
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As described by the free-radical theory, exposure to oxidizing agents results in unstable oxygen compounds that can be neutraliz
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Answer: The body produce NADPH a reducing equivalents as antioxidants.

Explanation:

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Because in SI, the expectation is that area and volume will be expressed in terms of a linear dimension( the metre) or its multiples.
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What a three of the signs of an allergic reaction to iv t-pa?
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Look out for angioedema (like hives but a deeper swelling due to an allergic reacrion), bleeding (such as intracranial, gastrointestinal and genitourinal hemorrhaging) and adverse reactions to drugs. Nausea, blood pressure spikes, severe headaches, acute hypertsnsion, etc are other signs of negative reacrions to iv t-pa as well.
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