1answer.
Ask question
Login Signup
Ask question
All categories
  • English
  • Mathematics
  • Social Studies
  • Business
  • History
  • Health
  • Geography
  • Biology
  • Physics
  • Chemistry
  • Computers and Technology
  • Arts
  • World Languages
  • Spanish
  • French
  • German
  • Advanced Placement (AP)
  • SAT
  • Medicine
  • Law
  • Engineering
dolphi86 [110]
4 years ago
5

What are the chemical formulas for..

Chemistry
1 answer:
andrezito [222]4 years ago
6 0
S4O5
S3O
SeF6
N4S5
CCl9

All numbers should be subscripts
You might be interested in
A chemist weighed out 19.9 g of aluminum. Calculate the number of moles of aluminum she weighed out.
vodomira [7]
Aluminum is 26.982 grams per mole, so 26.982/19.9 will give you the moles 1.3558794
3 0
4 years ago
Explain natural fiber extraction
Alex

Explanation:

natural fibre, any hairlike raw material directly obtainable from an animal, vegetable, or mineral source and convertible into nonwoven fabrics such as felt or paper or, after spinning into yarns, into woven cloth. ... Most textile fibres are slender, flexible, and relatively strong.

6 0
3 years ago
Read 2 more answers
Which of these alkalis has the most stable fluoride?
choli [55]
The correct option is B. The alkali metals combine directly with halogens forming high melting point crystalline solids that have high negative enthalpies of formation. The entalphy of formation for lithium bromide is the highest and the values decrease down the group, thus, lithium is the most stable while cesium is the least stable. 
5 0
3 years ago
Which element is used in light bulbs as a filament
mojhsa [17]
<span>The element that is used in light bulbs as a filament is tungsten - this is almost always the case in halogen and incandescent bulbs. Tungsten is chosen for this purpose because of the fact it can withstand temperatures of up to 4,500 degrees, as well as being incredibly flexible.</span>
8 0
4 years ago
Calculate the standard molar enthalpy of formation, in kJ/mol, of NO(g) from the following data:
Paraphin [41]

The above question is incomplete, here is the complete question:

Calculate the standard molar enthalpy of formation of NO(g) from the following data at 298 K:

N_2(g) + 2O_2 \rightarrow 2NO_2(g), \Delta H^o = 66.4 kJ

2NO(g) + O_2\rightarrow 2NO_2(g),\Delta H^o= -114.1 kJ

Answer:

The standard molar enthalpy of formation of NO is 90.25 kJ/mol.

Explanation:

N_2(g) + 2O_2 \rightarrow 2NO_2(g), \Delta H^o_{1} = 66.4 kJ

2NO(g) + O_2\rightarrow 2NO_2(g),\Delta H^o_{2} = -114.1 kJ

To calculate the standard molar enthalpy of formation

N_2+O_2\rightarrow 2NO(g),\Delta H^o_{3} = ?...[3]

Using Hess’s law of constant heat summation states that the amount of heat absorbed or evolved in a given chemical equation remains the same whether the process occurs in one step or several steps.

[1] - [2] = [3]

N_2+O_2\rightarrow 2NO(g),\Delta H^o_{3} = ?

\Delta H^o_{3} =\Delta H^o_{1} - \Delta H^o_{2}

\Delta H^o_{3}=66.4 kJ - [ -114.1 kJ] = 180.5 kJ

According to reaction [3], 1 mole of nitrogen gas and 1 mole of oxygen gas gives 2 mole of nitrogen monoxide, So, the standard molar enthalpy of formation of 1 mole of NO gas :

=\frac{\Delta H^o_{3}}{2 mol}

=\frac{180.5 kJ}{2 mol}=90.25 kJ/mol

3 0
3 years ago
Other questions:
  • Which is part of meiosis but not mitosis
    11·1 answer
  • Calculate the energy required to heat of 1.50 kg silver from -7.8 C to 15.0 C . Assume the specific heat capacity of silver unde
    5·1 answer
  • Which of the following compounds would be expected to have the strongest ionic bonds?
    15·2 answers
  • A duck flies 60 meters in 10 seconds. What is the duck’s speed?
    7·1 answer
  • If an automobile is able to travel 264 km on 23.3 L of gasoline, what is the gas mileage in miles per gallon?
    7·1 answer
  • What is the smallest part of all matter
    6·2 answers
  • Help I need a answer on question 18 and I only got 10 minutes
    13·1 answer
  • Can someone help me...........................
    8·2 answers
  • Cambiar dos meses a segundos
    15·1 answer
  • Hydrolysis of 1-cyano-2-methylbenzene proceeds slower than 1-cyano-4-methylbenzene. give structures and explain why?
    13·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!