For ≤ and ≥ , use a closed dot to indicate the number itself is part of the solution. For < and >, use an open circle to indicate the number itself is not part of the solution.
answer:
1) reaction is exothermic
2) some bonds are broken and some are formed (see explanation below)
Explanation:
When energy is written on the product side of a chemical reaction, means that the energy is appearing as consequence of the reaction, that is a released energy (heat) that heats the surroundings.
This kind of reaction where heat is released and, as a consequence, the temperature of the surroundings increase, is called exothermic.
In every chemical reaction some bonds are broken and others are formed.
Breaking bonds requires energy.
Forming bonds release energy.
The energy written on the chemical reaction is a net change of energy: the bonds broken on the reactant side used energy and bonds formed on the products side released energy.
When the energy released by the formation of the product is greater than the energy of the bonds broken on the reactant side, the chemical reaction is exothermic.
the answer is D. because a topographic map measures the lowest and highest points in a certain place
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B.) Since the mole ratio is 1:1. For every mole of copper, you have one mole of iron. To produce 1.00 mole of copper, you need 1.00 mole of iron. A mole of iron is equivalent to 55.85 grams.
A cell is highly efficient in fulfilling an extensive variety of tasks all by itself. Numerous processes, like transport, protein formation, cellular respiration, etc. take place inside the cell. These different functions are essential for an organism to be able to survive, and these can be accomplished by the cell due to the specialized functions and role of the organelles. The cell organelles execute their functions in order to help with the survival of the cell. The ribosomes help in protein formation, the mitochondria generates ATP and the phagocytes carry out phagocytosis. These specialized functions are very helpful so that a cell could perform a lot of functions.