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3 years ago

An atom's electrons have a great effect on

2 answers:

7 0

An atom's electrons have a great effect on how ''chemically reactive atom is".

An atom is a small particle that can exist or be combined with other atoms which forms a molecule. An atom is a chemical element.

Hope this helps :)

Dmitry [639]3 years ago

6 0

The correct answer is C. How chemically reactive the atom is.

Explanation:

An atom contains a nucleus with protons and neutrons as well as electrons negatively charged and bounded to the nucleus. Electrons do not affect the mass of the atom defined by the neutrons and protons, also they do not have and influence on the element the atom belongs to that is defined by protons but they affect magnetism and reactivity.

In terms of reactivity, this is mainly influenced by the number of electrons in the external shell of the atoms as this can form bonds with other atoms and therefore had a chemical reaction. Thus, an atom's electrons have a great effect on how chemically reactive the atom is.

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If a solution has a pH of 7.41, determine its H+ concentration.

makvit [3.9K]

$[H+]=10^-^p^H$

$[H+]=10^-^7^.^4^1$

$[H+] = 3.89$ $x$ $10^-^8$

8 0

3 years ago

Phosphine (PH3) can be prepared by the reaction of calcium phosphide , Ca3P2: based on this equation : Ca3P2 + 6H2O —-> 3 Ca(

MrMuchimi

Taking into account the reaction stoichiometry, you can observe that:

one mole of Ca₃P₂ produces 2 mol of PH₃.
the mole ratio between phosphine and calcium phosphide is 2 mol PH₃ over 1 mol Ca₃P₂.

<h3>Reaction stoichiometry</h3>

In first place, the balanced reaction is:

Ca₃P₂ + 6 H₂O → 3 Ca(OH)₂ + 2 PH₃

By reaction stoichiometry (that is, the relationship between the amount of reagents and products in a chemical reaction), the following amounts of moles of each compound participate in the reaction:

Ca₃P₂:1 mole
H₂O: 6 moles
Ca(OH)₂: 3 moles
PH₃: 2 moles

The molar mass of the compounds is:

Ca₃P₂: 182 g/mole
H₂O: 18 g/mole
Ca(OH)₂: 74 g/mole
PH₃: 34 g/mole

Then, by reaction stoichiometry, the following mass quantities of each compound participate in the reaction:

Ca₃P₂: 1 mole ×182 g/mole= 182 grams
H₂O: 6 moles× 18 g/mole= 108 grams
Ca(OH)₂: 3 moles ×74 g/mole= 222 grams
PH₃: 2 moles ×34 g/mole= 68 grams

<h3>Correct statements</h3>

Then, by reaction stoichiometry, you can observe that:

one mole of Ca₃P₂ produces 2 mol of PH₃.
the mole ratio between phosphine and calcium phosphide is 2 mol PH₃ over 1 mol Ca₃P₂.

Learn more about the reaction stoichiometry:

<u>brainly.com/question/24741074</u>

<u>brainly.com/question/24653699</u>

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1 year ago

A reaction is exothermic when Group of answer choices weak bonds break and strong bonds form. strong bonds break and weak bonds

Leona [35]

Answer:

weak bonds break and strong bonds form

Explanation:

An exothermic reaction is a chemical reaction in which heat energy is evolved during the reaction process.

Bond formation requires energy while bond breakage releases energy. More energy is needed for the formation of weak bonds as compared to strong bonds.

<em>Hence, when weak bonds break, they release more energy than needed to make a corresponding strong bond leading to the release of the remaining energy as heat.</em>

6 0

3 years ago

What is the independent variable for a dry ice experiment

mote1985 [20]

The independent variable is a variable that is being manipulated or controlled. This is to see how it affects, changes and yields the outcome of the particular stimuli.

The dry ice experiment has an IV of temperature and a DV of melting time.

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2 years ago

Jack lives in a small city in the Pacific Northwest, where the temperatures are cool all year and the sky is frequently cloudy a

kirill [66]

Answer:

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Explanation:

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2 years ago