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kvasek [131]
3 years ago
11

In a chemical reaction, the reactants (beginning elements or compounds) but have the same number and type of atoms as the produc

ts (the new substance created). This is an example of...
a) law of conservation of mass
b) law of conservation of energy
c) covalent bonding
d) product synthesis
Chemistry
2 answers:
snow_tiger [21]3 years ago
5 0
Your answers is a you can neither gain or lose
AleksAgata [21]3 years ago
4 0

Answer:The law of conservation of matter says that matter cannot be created or destroyed. In chemical equations, the number of atoms of each element in the reactants must be the same as the number of atoms of each element in the products. ... There are two oxygen atoms in the reactants and two atoms of oxygen in the product.

Explanation:

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In a redox reaction, which ion would you expect to be more easily reduced?.
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You would expect the cation to be more easily reduced.
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What is the atomic mass of an element that has 37 protons, 43 neutrons, and 36 electrons?
Veronika [31]

Answer:

the atomic mass of the element with 37 protons,43 neutrons and 36 electrons is 80

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3 years ago
An iceberg has a volume of 9470 ft3.What is the mass in kilograms of the iceberg? The density of ice in the iceberg is 0.92 g/cm
Gemiola [76]
To determine the mass of the iceberg, we simply multiply the density with the volume. Density is a value for mass, such as kg, divided by a value for volume, such as m3. Density is a physical property of a substance that represents the mass of that substance per unit volume. Remember that the units should be homogeneous. We calculate as follows:

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6 0
4 years ago
Use the periodic to fill in the numbers in the electron configurations shown below. Na: 1s22sC2pD3sE
Sergeeva-Olga [200]

Answer is: C is equal to 2, D is equal to 6 and E is equal to 1.

C, D and E represent number of electrons on each atomic orbital in sodium atom.

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Atomic number of sodium is 11, it means that it has 11 protons and 11 electrons, so atom of sodium is neutral.  


8 0
3 years ago
Read 2 more answers
A mixture of N2, O2, and Ar has mole fractions of 0.25, 0.65, and 0.10, respectively. What is the pressure of N2 if the total pr
s344n2d4d5 [400]

Answer:

Partial pressure of nitrogen gas is 0.98 bar.

Explanation:

According to the Dalton's law, the total pressure of the gas is equal to the sum of the partial pressure of the mixture of gases.

P=p_{N_2}+p_{O_2}+p_{Ar}

p_{N_2}=P\times \chi_{N_2}

p_{O_2}=P\times \chi_{O_2}

p_{Ar}=P\times \chi_{Ar}

where,

P = total pressure = 3.9 bar

p_{N_2} = partial pressure of nitrogen gas  

p_{O_2} = partial pressure of oxygen gas  

p_{Ar} = partial pressure of argon gases  

\chi_{N_2} = Mole fraction of nitrogen gas  = 0.25

\chi_{O_2} = Mole fraction of oxygen gas  = 0.65

\chi_{Ar} = Mole fraction of argon gases = 0.10

Partial pressure of nitrogen gas :

p_{N_2}=P\times \chi_{N_2}=3.9 bar\times 0.25 =0.98 bar

Partial pressure of oxygen gas :

p_{N_2}=P\times \chi_{O_2}=3.9 bar\times 0.65=2.54 bar

Partial pressure of argon gas :

p_{N_2}=P\times \chi_{Ar}=3.9 bar\times 0.10=0.39 bar

7 0
4 years ago
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