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2 years ago

Which substance is a diatomic molecule

Chemistry

2 answers:

aleksandrvk [35]2 years ago

8 0

heteronuclear diatomic molecule: .....hydrogen,chlorine,bromine,nitrogen etc

Neporo4naja [7]2 years ago

4 0

There are a lot of substances. The substances are hydrogen, nitrogen, oxygen, fluorine, chlorine, bromine, and iodine. Diatomic Molecule consists of atoms from only two different elements.

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Binary compounds of alkali metals and hydrogen react with water to liberate hydrogen gas. The hydrogen gas from the reaction of

DanielleElmas [232]

Answer: The mass of $H_{2}$ liberated is 0.0383 g and the mass of NaH that reacted 0.455 g.

Explanation:

The given data is as follows.

Volume = 0.501 L,

Temperature of gas = $35^{o}C$ = (35 + 273) K = 308 K,

Total pressure = 760 mm Hg

Vapor pressure of water at $35^{o}C$ = 422 mm Hg

Partial pressure of $H_{2}$ = (760 - 422) mm Hg

= 717.8 mm Hg

The chemical equation is as follows.

$NaH + H_{2}O \rightarrow NaOH + H_{2}$

Using ideal gas equation, we will find the moles of hydrogen gas as follows.

PV = nRT

n = $\frac{PV}{RT}$

As we know,

1 atm = 760 mm Hg

717.8 mm Hg = $717.8 \times \frac{1 atm}{760 mm Hg}$

= 0.944 atm

Putting the given values into the above formula we will calculate the number of moles as follows.

n = $\frac{PV}{RT}$

= $\frac{0.944 atm \times 0.510 L}{0.08206 Latm/mol K \times 308 K}$

= 0.0190 moles

Now, we will find the mass of $H_{2}$ as follows.

Mass = Moles × Molar mass

= 0.0190 moles × 2.01588 g/mol

= 0.0383 g

Therefore, mass of hydrogen is 0.0383 g.

As the ratio between $H_{2}$ and NaH is 1:1. So, we will calculate the moles of NaH as follows.

Mass = Moles × Molar mass

= 0.0190 moles × 23.99771 g/mol

= 0.455 g

Therefore, mass of NaH is 0.455 g.

6 0

2 years ago

The theory of plate tectonics was, at first, rejected by most scientists. Now most geologists accept that tectonic plates exist

Alenkasestr [34]

Answer:

The validation of seafloor spreading in the 1950s and 60s

Explanation:

The theory of seafloor spreading was supported by numerous evidence including thermal probes that showed that heat flow over the mid-ocean ridges measured up to four times those measured in general bottom sediments, which are taken as due to the presence of molten Earth material close to the ridge crest

The ridge crest also show signs unusually seismic wave velocities that are considered to be due to microfracturing and thermal expansion from upwelling magma

4 0

2 years ago

Read 2 more answers

How many grams of nitric acid HNO₃, are required to neutralize (completely react with) 4.30 grams of Ca(OH)2 according to the ac

Brrunno [24]

Answer:

7.32g of HNO3 are required.

Explanation:

1st) From the balanced reaction we know that 2 moles of HNO3 react with 1 mole of Ca(OH)2 to produce 2 moles of H2O and 1 mole of Ca(NO3)2.

From this, we find that the relation between HNO3 and Ca(OH)2 is that 2 moles of HNO3 react with 1 mole of Ca(OH)2.

2nd) This is the order of the relations that we have to use in the equation to calculate the grams of nitric acid:

• starting with the 4.30 grams of Ca(OH)2.

• using the molar mass of Ca(OH)2 (74g/mol).

• relation of the 2 moles of HNO3 that react with 1 mole of Ca(OH)2 .

• using the molar mass of HNO3 (63.02g/mol).

$4.30g\text{ Ca\lparen OH\rparen}_2*\frac{1\text{ mol Ca\lparen OH\rparen}_2}{74g\text{ Ca\lparen OH\rparen}_2}*\frac{2\text{ moles HNO}_3}{1\text{ mole Ca\lparen OH\rparen}_2}*\frac{63.02g\text{ HNO}_3}{1\text{ mole HNO}_3}=7.32g\text{ HNO}_3$

So, 7.32g of HNO3 are required.

4 0

1 year ago

What type of particle has no mass or charge? A) Alpha B) Beta C) Gamma D) Proton

viva [34]

Answer:

Your answer would be C.

Explanation:

Gamma radiation, unlike alpha or beta, does not consist of any particles, instead consisting of a photon of energy being emitted from an unstable nucleus. Having no mass or charge, gamma radiation can travel much farther through air than alpha or beta, losing (on average) half its energy for every 500 feet.

4 0

2 years ago

Read 2 more answers

True or false? the iron recommendation for girls exceeds that of boys during adolescence.

sashaice [31]

It is true that the iron recommendation for girls exceeds that of boys during adolescence.

During an adolescence, girls and boys require iron for a large growth spurt and the gain of adult phenotypes and biologic rhythms.

In this period of the life, iron recommendation increase in both girls and boys, because of the increase in lean body mass, the expansion of the total blood volume, the increase and start of menstruation at girls.

Iron is essential for oxygen transport, red blood cell creation, cognitive performance and immunological function.

The overall iron requirements for girls are up to twice as boys.

More about adolescence: brainly.com/question/13528489

#SPJ4

4 0

1 year ago