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What is the atomic number of this element?

Mass of ammonia produced : 121.38 g

Given

Reaction

3H₂(g) + N₂(g) ⇒ 2NH₃(g)

100g of N₂

Required

Ammonia produced

Solution

mol of N₂ :

[tex]\tt mol=\dfrac{mass}{MW}\\\\mol=\dfrac{100}{28}\\\\mol=3.57[/tex]

From the equation, mol ratio of N₂ and NH₃ = 1 : 2, so mol NH₃ :

[tex]\tt \dfrac{2}{1}\times 3.57=7.14~moles[/tex]

mass of NH₃(MW=17 g/mol) :

[tex]\tt mass=mol\times MW\\\\mass=7.14\times 17\\\\mass=121.38~g[/tex]

Answer:

The answer is A.........

Answer:

It´s letter A

Explanation:

Answer:

a. increases

b. increases

c. decreases

Answer:

eons.

It would be D. An eon.

Answer:

mass number- 7 (round it to 7

Explanation:

Answer: c. peanut oil

Explanation:

Answer:

5.70×10^-11 m

Explanation:

Answer:

Energy in the ocean and the atmosphere

Explanation:

Hope this helps!

Answer:

Heres a very LONG answer-

The real answer:

Its in the kinetic-molecular theory, the temperature of a substance is related to the average kinetic energy of the particles of that substance. When a substance is heated, some of the absorbed energy is stored within the particles, while some of the energy increases the motion of the particles.

Answer:

Next, the lb will be canceled at 2.2 lb and the kg would be canceled at 1 kg. You cross, multiply, then. 46 x 1 x 1000 is 46000, only moving to the decimal point. 1 x 2.2 x 1 will stay the same, so you'd have 46000 over 2.2.

Explanation:

kuroo man <3

Answer:

Next, the lb will be canceled at 2.2 lb and the kg would be canceled at 1 kg. You cross, multiply, then. 46 x 1 x 1000 is 46000, only moving to the decimal point. 1 x 2.2 x 1 will stay the same, so you'd have 46000 over 2.2.

Explanation:

halo

Answer:

6.8 liters of propane gas will undergo a complete combustion with 34.0 L of oxygen gas.

Explanation:

Given;

combustion reaction of propane and oxygen;

C₃H₈ + O₂(g)  → CO₂(g)     + H₂O(g)

Balance the chemical reaction as follows;

C₃H₈ + 5O₂(g)  → 3CO₂(g)   +   4H₂O(g)

From the balanced equation;

1 mole of C₃H₈ ---------------- 5 moles of 5O₂(g)

x Liters of C₃H₈ ----------------- 34.0 Liters of O₂(g)

x = 34 liters / 5

x = 6.8 liters

Therefore, 6.8 liters of propane gas will undergo a complete combustion with 34.0 L of oxygen gas.

Answer:

The function of the mitochondria is to obtain and convert energy. What body system has a similar function?

Explanation:

Chloroplasts are very similar to mitochondria, but are found only in the cells of plants and some algae. Like mitochondria, chloroplasts produce food for their cells. Chloroplasts help turn sunlight into food that can be used by the cell, a process known as photosynthesis

Answer:

yes

Explanation:

the sugar was a solid but after being dissolved in a liquid it changed state

Answer:

Non-zero digits are always significant.

Any zeros between two significant digits are significant.

A final zero or trailing zeros in the decimal portion ONLY are significant. If a number ends in zeros to the right of the decimal point, those zeros are significant.

Explanation:

1.138 has 4 significant figures, which are 1, 1, 3 and 8. The numbers after the decimal point are decimals and are significant figures.

Answer:

B heat

Explanation:

Answer:

a

Explanation:

uh process of elimination

Temperature change, phase change to liquid or gas are all physical changes not chemical reactions. A color change indicates a chemical reaction has taken place.

Chemical changes are taking place by the breaking or making of chemical bonds. It results in the formation of a new product which is having different properties than the initial substances.

Physical changes does not involve any change in chemical bond. Phase changes, change in size, shape, conductivity, solubility etc. are physical changes. A change in temperature phase conversion into gas or liquid are all physical changes.

A change in color indicates that a new product is formed there. For  example reddish brown rust is iron oxide formed by the reaction of Fe with oxygen. Therefore, option c is correct.

Find more on chemical changes:

https://brainly.com/question/2591189

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Answer:

It is balanced.

Explanation:

You have the same amount of atoms on both sides. 2 carbon and 4 oxygen.

Answer:

Explanation:

halogen group

Electron affinities are negative numbers because energy is released. The elements of the halogen group (Group 17) gain electrons most readily, as can be seen from their large negative electron affinitie

Answer:

tbh i liked how u ghosted me

Explanation:

Answer:h

Explanation:

Answer:

0.768 m

Explanation:

1 cm = 0.01 m

76.8 cm * 0.01 m/ 1 cm

0.768 m

Answer:

A working model used to test a design is called a

stop

Explanation:

Molar mass of Cobalt (II) chloride = 129.8g/mol

Moles of CoCl2 = 9.32/129.8 = 0.0718mol

Mass of H2O lost after heating = 15.80 - 9.32 = 6.48g

Moles of H2O = 6.48/18 = 0.36mol

Mole ratio of CoCl2 : H20

= 0.0718mol : 0.36mol

= 1 : 5

Hence the formula is CoCl2 . 5H2O, which is Copper (II) chloride pentahydrate.

Answer:

A simulated example of additive color mixing. Additive primaries act as sources of light. The primaries red, green, and blue combine pairwise to produce the additive secondaries cyan, magenta, and yellow. Combining all three primaries (center) produces white.

when all of the primary colors are mixed it makes black

Explanation:

Answer: they are called electrical conductors.

Explanation:

Some materials let electricity pass through them easily. These materials are known as electrical conductors. Many metals, such as copper, iron and steel, are good electrical conductors. That is why the parts of electrical objects that need to let electricity pass through are always made of metal.

Answer:

Electrical Conductors

Explanation: