Chemistry, 29.10.2019 14:31 oscaryn7213

What is the chemical name for the compound with the formula na2s?
a. sodium fluoride
b. magnesium sulfide
c. lithium oxide
d. sodium sulfide

Answers: 2

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Answers

I think it's Sodium Sulfide, because Na2S contains one Sodium and two Sulfur. Plus Sulfide is used to describe any of three types of chemical compounds that contain sulfur.

Answer from: asdf334asdf334

Answer : The correct option is, sodium sulfide

Explanation :

The given formula is, Na_2S

The rules for the naming of the binary molecular compound are :

First element in the formula is named first and keep its element name. Gets a prefix if there is a subscript on it. Second element is named second. Use the root of the element name plus suffix (-ide). Always use a prefix on the second element.

In the given formula, the first element is (Na) sodium and the second element is sulfur. Thus, the chemical name of the compound is, sodium sulfide.

Therefore, the chemical name for the compound with the formula Na_2S is, sodium sulfide.

Answer from: Quest

the grams of barium that are in 2.3 x 10^23 atoms of barium is 52.4 g (answer c)

calculation

mass = moles of ba x molar mass of ba

molar mass of ba from periodic table= 137.3 g/mol

use the avogadro's law constant to calculate the moles of barium

that is 1 mole = 6.02 x 10^23 atoms

? moles = 2.3 x 10^23 atoms

by cross multiplication

=(1 mole x 2.3x 10^23 atoms) / 6.02 x10^23 atoms)= 0.382 moles

mass is therefore = 137.3 g/mol x 0.382 mol = 52.4 ( answer c)

explanation:

Answer from: Quest

a mercury barometer is a device that uses the physical properties of mercury in a tube to measure barometric pressure. mercury barometers are used for : -

1. measurement of atmospheric pressure

2. determining the altitude of a place

3. weather forecasting

4. calibration and checking of aneroid barometers

5. application in fluid mechanics

6. measurement of pressure in aircrafts

7. surface weather analysis

8. preparation of barographs

9. usage in physical sciences like physics, astronomy & chemistry

10. preparation of aircraft altimeters

characteristics of mercury barometer : -

1.used to define and measure atmospheric pressure.

2.on the average at sea level the column of mercury rises to a height of about 760 mm.

3.this quantity is equal to 1 atmosphere.

4.it is also known as standard atmospheric pressure.

5.a barometer in which the weight of a column of mercury in a glass tube with a sealed top is balanced against that of the atmosphere pressing on an exposed cistern of mercury at the base of the mercury column, the height of the column varying with atmospheric pressure.

Write 15 uses of a mercury barometer along with its characterestics

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You know the right answer?

What is the chemical name for the compound with the formula na2s?
a. sodium fluoride
b....

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