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3 years ago

Who knows this I need it

Chemistry

1 answer:

arsen [322]3 years ago

5 0

1. In the first image, you can see two cacti and a javelina in the background.

2. In picture one, neither of the plants are being disturbed. In picture two, however, the smaller plant is indeed being disturbed by the javelina.

3. The javelina is not eating the cactus on the right because it is stronger in color (?).

4. The cactus the javelina was eating has disappeared.

5. In picture 3, the idle cactus blossomed.

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In an exothermic reaction, the average kinetic energy of the particles of matter ib the products _____

erastova [34]

Answer:

decreases

Explanation:

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2 years ago

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lara [203]

Answer:

Balanced forces are equal in size and opposite in direction. When forces are balanced, there is no change in motion. In one of your situations in the last section, you pushed or pulled on an object from opposite directions but with the same force. You observed that the object did not move.

Explanation:

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2 years ago

Read 2 more answers

Fe(s) is already one atom and it is gas. Why do we call it a solid?

nadezda [96]

We call it a solid because it has the () and in s inside of it meaning solid

4 0

3 years ago

Insulin is a protein that is used by the body to regulate both carbohydrate and fat metabolism. A bottle contains 125 mL of insu

Gnoma [55]

125x30= 3750mg=3,75g

8 0

3 years ago

If you are given the molarity of a solution, what additional information would you need to find the weight/weight percent (w/w%)

Ludmilka [50]

Answer:

- The molar mass of the solute, in order to convert from moles of solute to grams of solute.

- The density of solution, to convert from volume of solution to mass of solution.

Explanation:

Hello,

In this case, since molarity is mathematically defined as the moles of solute divided by the volume of solution and the weight/weight percent as the mass of solute divided by the mass of solution, we need:

- The molar mass of the solute, in order to convert from moles of solute to grams of solute.

- The density of solution, to convert from volume of solution to mass of solution.

For instance, if a 1-M solution of HCl has a density of 1.125 g/mL, we can compute the w/w% as follows:

$w/w\%=1\frac{molHCl}{L\ sln}*\frac{36.45gHCl}{1molHCl}*\frac{1L\ sln}{1000mL\ sln}*\frac{1mL\ sln}{1.125g\ sln} *100\%\\\\w/w\%=3.15\%$

Whereas the first factor corresponds to the molar mass of HCl, the second one the conversion from L to mL of solution and the third one the density to express in terms of grams of solution.

Regards.

4 0

2 years ago