Chemistry

Chemistry
DeenaParmar
2021-03-25 17:23:45
19 The coefficients in a balanced chemical equation represent(l ) the mass ratios of the substances in the reaction(2) the mole ratios of the substan...
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Chemistry
mariaalmeda
2021-03-25 15:38:00
An original sample of K-40 has a mass of 25.00 grams. After 3.9 × 109 years, 3.125 grams of the original sample remains unchanged. What is the half...
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Chemistry
MarianoSatterly
2021-03-25 13:17:00
At 20.°C, a 1.2-gram sample of Mg ribbon reacts rapidly with 10.0 milliliters of 1.0 M HCl(aq). Which change in conditions would have caused the re...
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Chemistry
millie
2021-03-25 13:05:15
Draw a Lewis electron-dot diagram for an atom of silicon....
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Chemistry
Ebase35
2021-03-25 12:30:00
what is the total number of different elements present in NH4NO3...
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Chemistry
jesseflowers
2021-03-25 12:18:15
One foreign policy goal of President Theodore Roosevelt was to (1) create future states by annexing Pacific island territories (2) restrict Europ...
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Chemistry
NerdyGirl123
2021-03-25 10:09:00
7 Which phrase describes the molecular structure and properties of two solid forms of carbon, diamond and graphite?(1) the same molecular structures ...
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Chemistry
Maria2425
2021-03-25 06:14:00
How many electrons are shared in a double bond?...
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Chemistry
Michelle205200
2021-03-25 04:51:45
Which statement about one atom of an element identifies the element?(1) The atom has 1 proton. (2) The atom has 2 neutrons.(3) The sum of the number...
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Chemistry
nolabel
2021-03-25 03:06:00
In his pamphlet Common Sense, Thomas Paine urged American colonists to (1) establish their own nation (2) pay their colonial taxes (3) obey the l...
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Chemistry
iahboo143
2021-03-25 01:55:30
How does the absorption and release of energy affect temperature change during a chemical reaction?...
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Chemistry
WorldWarII
2021-03-25 00:21:30
Describe an example of heat being transferred from a warmer object to a cooler object without both objects touching....
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Chemistry
Oesch604
2021-03-24 21:48:45
a strip of impure copper is given to you. how will you purify it by using chemical effects of electric current ?...
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Chemistry
user1415805680407
2021-03-24 19:27:45
2. The relationship between a cathode and an anode involves...
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Chemistry
Jmfinlan
2021-03-24 17:42:00
Which compound is insoluble in water? (1) KOH (3) Na3PO4 (2) NH4Cl (4) PbSO4...
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Chemistry
Inahea
2021-03-24 17:06:45
Which statement describes the particle of an ideal gas? (1)The particles move in well-defined, circular paths (2)When the particles collide,energy...
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Chemistry
tanvir770
2021-03-24 12:36:30
An atom of which element has the largest atomic radius? (1) Fe (3) Si (2) Mg (4) Zn...
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Chemistry
king456123
2021-03-24 12:13:00
Which electron configuration represents a selenium atom in an excited state?(1) 2-7-18-6(2) 2-7-18-7(3) 2-8-18-6(4) 2-8-18-7...
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Chemistry
Rabin159
2021-03-24 11:49:30
Which formula represents an unsaturated hydrocarbon? (1) C5H12 (3) C7H16 (2) C6H14 (4) C8H14...
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Chemistry
rigvelsonjoseph71
2021-03-24 09:05:00
Explain how convergent boundaries of oceanic crust form islands...
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Chemistry
cailea
2021-03-24 07:54:30
Given the incomplete equation representing a reaction: 2C2H14 + ____ O2 --> 12 CO2 + 14 H2O What is the coefficient of O2 when the equation is comp...
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Chemistry
ShanTay6996
2021-03-24 07:07:30
The most common isotope of chromium has a mass number of 52. Which notation represents a different isotope of chromium? a. 52/25Cr b. 54/24Cr c. ...
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Chemistry
sinthiya119
2021-03-24 05:33:30
An oxidation-reduction reaction involves the (1) sharing of electrons (2) sharing of protons (3) transfer of electrons (4) transfer of protons...
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Chemistry
cheyleighwereta
2021-03-24 00:39:45
Two categories of compounds are (1) covalent and molecular (2) covalent and metallic (3) ionic and molecular (4) ionic and metallic...
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Chemistry
carrus429
2021-03-24 00:28:00
Which development was a direct result of the baby boom that followed World War II? (1) decrease in school construction (2) increase in suburbaniza...
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