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melomori [17]
3 years ago
12

All animals depend on plants for food. Some animals eat plants for food and other animals eat animals that eat plants. The plant

s depend on a source of energy too. What source of energy do the plants depend on?
Chemistry
2 answers:
Taya2010 [7]3 years ago
8 0

Answer:

a

Explanation:

pshichka [43]3 years ago
7 0
Plants depend on the sun as a source of energy.
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2.50 L of a gas at standard temperature and pressure is compressed to 575 mL. What is the new pressure of the gas
BartSMP [9]

Answer:

reek

Explanation:

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5 0
3 years ago
What happens to the chemical identity of a substance during a physical change?
klio [65]
Nothing happens because a physical change only changes the appearance of the substance, whereas a chemical change transforms the substance into something completely different.
i.e. (chemical change) wood + fire = ash
(physical change) wood + axe = smaller pieces of wood
5 0
3 years ago
Decide whether a chemical reaction happens in either of the following situations. If a reaction does happen, write the chemical
sineoko [7]

Explanation:

A strip of solid palladium metal is put into a beaker of nicl2

Palladium (Pd) + Nickel Chloride (NiCl2)

To answer this question properly you must refer to the reactivity series.

The activity series is a chart of metals listed in order of declining relative reactivity. The top metals are more reactive than the metals on the bottom.

In this series, Nickel is higher than Palladium. This means that if a Palladium strip is placed into a solution of a Ni salt, then a reaction will not take place, nothing would happen.

Because Pd is lower than Ni in the reactivity series.

There is no reaction so no equation.

7 0
3 years ago
Place the following in order of increasing molar entropy at 298 K.
Genrish500 [490]

Answer:

SO < CO2 < C3H8

Explanation:

Entropy refers to the degree of disorderliness of a system. The standard molar entropy of a substance refers to the entropy of 1 mole of the substance vunder standard conditions.

The molar entropy depends on the number of microstates in the system which in turn depends on the number of atoms in the molecule.

C3H8 has 11 atoms and hence the highest number of microstates followed by CO2 having three atoms and least of all SO having only two atoms.

3 0
2 years ago
Indicate the number of h2 and n2 molecules needed to yield two molecules of Nh3
kati45 [8]
The balanced chemical reaction and or equation for the famous haber or ammonia process would be :

3H2 + N2 => 2NH3.

8 0
3 years ago
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