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Katarina [22]
3 years ago
9

The natural tendence of an object to resist change in its state of motion is:

Chemistry
1 answer:
melisa1 [442]3 years ago
5 0

Inertia. Inertia is the natural tendency of bodies to remain in their states of either rectilinear or resting motion.

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How many atoms of group 17 element would be needed react with one atom of a group 2 element? Explain
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Only one atom because atom with 17 electrons need that one electron to become stable
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what is cotinental drift defin this term whith three scientific evidnce in 3-5 sentences HELP ME I'LL MAKE YOUR BRAINEST AND YOU
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how does the percentage by mass of the solute describe the concentration of an aqueous solution os potassium sulfate
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Answer:

Explanation:

In an aqueous solution of potassium sulfate (K₂SO₄), the solute is K₂SO₄ and the solvent is water. The percentage by mass describes the grams of solute there are dissolved per 100 grams of solution. It can be calculated as:

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3 0
2 years ago
Which statement about AHf is true?
Pachacha [2.7K]

Answer:

  • <u><em>It is positive when the bonds of the product store more energy than those of the reactants.</em></u>

Explanation:

The <em>standard enthalpy of formation</em>, <em>ΔHf</em>, is defined as the energy required to form 1 mole of a substance from its contituent elements under standard conditions of pressure and temperature.

Then, per defintion, when the elements are already at their standard states, there is not energy involved to form them from that very state; this is, the standard enthalpy of formation of the elements in their standard states is zero.

It is not zero for the compounds in its standard state, because energy should be released or absorbed to form the compounds from their consituent elements. Thus, the first choice is false.

When the bonds of the products store more energy than the those of the reactants, the difference is:

  • ΔHf =  ΔHf products - ΔHf reactants > 0, meaning that ΔHf is positive. Hence, the second statement is true.

Third is false because forming the compounds may require to use (absorb) or release (produce) energy, which means that ΔHf could be positive or negative.

Fourth statement is false, because the standard state of many elements is not liquid. For example, it is required to supply energy to iron to make it liquid. Thus, the enthalpy of formation of iron in liquid state is not zero.

3 0
3 years ago
the elements in group 2 have similar chemical properties because each atom of these elements has the same
Vsevolod [243]
They have same electronic configuration
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