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mr_godi [17]
3 years ago
6

SOLVE FAST....⚡⚡⚡

Chemistry
1 answer:
Rina8888 [55]3 years ago
6 0

Answer:

thanks for the points

Explanation:

have a nice day

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Sharping a pencil leaves behind pencil shavings. Is sharpening pencil a physical or chemical change
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Physical, since you are physically changing its appearance
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Physical properties of reactants: Physical properties of products: 12.
dolphi86 [110]

Answer: The reactants are baking soda and vinegar. Baking soda is a white powder, and vinegar is a clear liquid. The products of this reaction are carbon dioxide, water, and sodium acetate. Carbon dioxide is a colorless gas, water is a colorless liquid, and sodium acetate is a white crystalline powder.

A chemical change can be seen in how the molecular formulas of the products are different from the reactants, since the reactants have chemically changed into completely different molecules.

Hope this helps

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3 years ago
What are two properties of most nonmetals
vekshin1

Answer: Summary of Common Properties

  • High ionization energies.
  • High electronegativities.
  • Poor thermal conductors.
  • Poor electrical conductors.
  • Brittle solids—not malleable or ductile.
  • Little or no metallic luster.
  • Gain electrons easily.
  • Dull, not metallic-shiny, although they may be colorful.

Explanation:

<u><em>May I please have brainiest?</em></u>

3 0
3 years ago
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A sample of carbon of mass 250 mg from wood found in a tomb underwent 2480 carbon- 14 disintegrations in 20 h. Estimate the time
Ksenya-84 [330]

Explanation:

Let the age to be found in years is y.

Hence,       (2480 disintegrations) \times \frac{\frac{1.0g}{0.250g}}{1.84 \times 10^{4} disintegrations}

                        = (\frac{1}{2})^{\frac{y}{5730yr}}

Solve for y as follows.

                    0.53913 = (\frac{1}{2})^{\frac{y}{5730yr}}

Now, taking log on both the sides as follows

               log 0.53913 = (\frac{z}{5730}) log \frac{1}{2}&#10;

               \frac{log 0.53913}{log (1/2)} = \frac{z}{5730}

                       z = \frac{5730 \times log 0.53913}{log (1/2)}

                         = 5107 years

Thus, we can conclude that the time since death is 5107 years.

5 0
3 years ago
The combined forces acting on an object make up the ___ force
sp2606 [1]

Answer:

net force

Explanation:

The net force acting on an object is the combination of all of the individual forces acting on it. ... If two forces act on an object in the same direction, the net force is the sum of the two forces.

3 0
3 years ago
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