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Inga [223]
3 years ago
7

a teacher uses a bow and arrow to demonstrate accuracy and precision. she shoots several arrows, aiming at the exact center of t

he target each time. the drawing below shows where her arrows hit the target.
Chemistry
1 answer:
Vera_Pavlovna [14]3 years ago
7 0
A teacher uses a bow and arrow to demonstrate accuracy and precision. she shoots several arrows, aiming at the exact center of the target each time. thedrawing below shows where her arrows hit the target.
<span> The statement  that best describes her shots is
</span><span>Her shots were neither accurate nor precise
</span>hope it helps
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Types of osmosis...in 50 words​
ICE Princess25 [194]

<h3>Types of Osmosis</h3>

Osmosis is of two types:

Endosmosis– When a substance is placed in a hypotonic solution, the solvent molecules move inside the cell and the cell becomes turgid or undergoes deplasmolysis. This is known as endosmosis.

Exosmosis– When a substance is placed in a hypertonic solution, the solvent molecules move outside the cell and the cell becomes flaccid or undergoes plasmolysis. This is known as exosmosis.

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Which of these would be caused by a chemical change?
s2008m [1.1K]

Metamorphic rock forming from igneous.

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PLEASE PLEASE HELP ME
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Answer:

Water

Explanation:

Water is included as a compound!

5 0
3 years ago
The insulating and packing material Styrofoam is a dating and packing material Styrofoam is a polymer of styrene. Find the molec
Nataly [62]

Explanation:

In order to find the molecular formula, we have to find the empirical formula first of all.

It is known that is a styrofoam, elements present are carbon and hydrogen atoms.

Element     %         Atomic mass       Molar ratio           Simple ratio

    C        92.25          12.01              \frac{92.25}{12.01} = 7.68                 \frac{7.68}{7.68} = 1

     H        7.75            1.008            \frac{7.75}{1.008} = 7.68                 \frac{7.68}{7.68} = 1

As empirical formula of styrofoam is C_{x}H_{x}.

Hence, empirical mass = (12.01 + 1.008) g/mol = 13.018 g/mol = 13.0 g/mol (approx)

Molar mass given is 104 g/mol.

So,     \frac{\text{molar mass}}{\text{empirical formula mass}} = \frac{104}{13.0} = 8

Thus, we can conclude that molecular formula of the given styrene is C_{8}H_{8}.

8 0
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If two atoms of sodium (Na) combine with one molecule of chlorine (cI2), which of the following could be the product?
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2Na + Cl2 ----> 2NaCl 
  .: product have to be " 2NaCl "  
 
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