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Darya [45]
3 years ago
5

Consider sodium oxide, Na2O. Choose the best explanation for the subscript, 2, from the list provided. There are two atoms of ox

ygen and one atom of sodium. There are two atoms of sodium and one atom of oxygen. There are two molecules of sodium and two atoms of oxygen. There are two molecules of sodium oxide.
Chemistry
2 answers:
Shalnov [3]3 years ago
7 0

There are two atoms of sodium and one atom of oxygen.

maria [59]3 years ago
7 0

Answer:

There are two atoms of sodium and one atom of oxygen.

Explanation:

Atom is the element in its most simple form, that we can find in the periodic table, such as H (Hydrogen), O (Oxygen) and Na (Sodium).

A molecule is a compound formed by atoms that have covalent bonds between them. Covalent bonds occur between non-metals, or non-metals with hydrogen, or between hydrogen.

The bond between metal and non-metal is ionic, and the compound is not a molecule, it's a crystalline solid.

So, in Na2O, there are 2 atoms of Na and one atom of O, and there is a crystalline solid.

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Which of the following happens to a molecule of an object when the object is heated? (1 point)
vfiekz [6]

Answer:

They get more energy, so they vibrate!

Explanation:

7 0
3 years ago
Given the following Fischer projection: Fischer projection for an entantiomer of 2-bromo-2,3-dihydroxypropanal with the bromine
harina [27]

Answer:

Explanation:

Stereoisomers are two or more atoms that  have the same bonding order of atoms but there is a difference  spatial arrangement of  the  atoms in space.

A plane of symmetry divides a molecule into two equal halves.

A chiral stereoisomer are not superimposed on a mirror image , Hence they do not posses a plane of symmetry.

As a result to that. these non-superimposable mirror images are said to be Enantiomers.

However, a Fischer Projection emanates from a two - dimensional figure which is used for presenting a three - dimensional organic molecules.

From the given question;

Fischer projection for an enantiomer of 2-bromo-2,3-dihydroxypropanal with the bromine oriented horizontally to the left and the hydroxide group oriented horizontally to the right.

we can sketch the way the enantiomer of 2-bromo-2,3-dihydroxypropanal can  be seen like the one shown below:

              CH₂OH

                   |

                   |

                   |

Br -------------|----------------OH

                   |

                   |

                   |

                 CHO

The objective of this question is to drawn the perspective formula of the molecule.

So , from the attached file below; we can see the perspective formula of the molecule in a well structured 3-D format.

5 0
3 years ago
A gas mixture contains HBr, NO2, and C2H6 at STP.If a tiny hole is made in the container, which gas will effuse fastest?Which ga
MakcuM [25]

Explanation:

Molar mass of HBr = 81 g/mol

Molar mass of nitrogen dioxide gas = 46 g/mol

Molar mass of ethane = 30 g/mol

Graham's Law states that the rate of effusion or diffusion of gas is inversely proportional to the square root of the molar mass of the gas. The equation given by this law follows the equation:

\text{Rate of diffusion}\propto \frac{1}{\sqrt{\text{Molar mass of the gas}}}

So, the gas with least molar mass will effuse out fastest from the container and that is ethane gas.

The formula for average kinetic energy is:

K.E=\frac{3}{2}kT

where,

k = Boltzmann’s constant = 1.38\times 10^{-23}J/K

T = temperature = 273.15 K ( at STP)

As we can see from the formula that kinetic energy depends upon only temperature of the gas molecule.

So, from this we can say that all the gas molecules have the same average kinetic energy at this temperature.

5 0
3 years ago
Which force controls the size of an atomic nucleus?.
klemol [59]

Answer:

strong nuclear force

Explanation:

1, a force that acts on charged particles

2, a force that holds atomic nuclei together

3, gravity, weak nuclear, electromagnetic, strong nuclear

4, strong nuclear force

5, Gravity and the electromagnetic force have infinite ranges while the nuclear forces have very small ranges.

100% :)

3 0
2 years ago
Show calculations for determining the mass of sugar in an 8 oz sample of soft drinks.​
poizon [28]

Answer:

m_{sugar}=23.7g\ sugar

Explanation:

Hello,

In this case, we can first compute the volume of the sample in mL from the ounces:

8oz*\frac{29.5735mL}{1oz} =236.6mL

Thus, with the volume of the sample, we can compute the amount of sugar given the 10 g of sugar per 100 mL of soft drink as shown below:

m_{sugar}=236.6mL*\frac{10g\ sugar}{100mL}\\ \\m_{sugar}=23.7g\ sugar

Best regards.

7 0
3 years ago
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