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Nina [5.8K]
2 years ago
13

What type of coal is the most efficient when burned as a fuel?

Chemistry
2 answers:
goldfiish [28.3K]2 years ago
6 0
Anthracite

ex: Anthracite coal is the hottest burning fuel in comparison to the most common ones in use. Environmentally cleaner than other fossil fuels. Due to its low sulfur content, Anthracite coal produces virtually no smoke or particulate emissions.
sukhopar [10]2 years ago
5 0
D. Anthracite is the correct answer I’m 95% sure
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if 11.74 liters of gas at STP are pumped into a basketball, how many moles of gas are in the basketball? assume the basketball w
ser-zykov [4K]

Answer:

0.52 mol

Explanation:

Using the general gas equation formula:

PV = nRT

Where;

P = pressure (atm)

V = volume (Liters)

n = number of moles (mol)

R = gas law constant (0.0821 Latm/molK)

T = temperature (K)

At STP (standard temperature and pressure), temperature of a gas is 273K, while its pressure is 1 atm

Using PV = nRT

n = PV/RT

n = (1 × 11.74) ÷ (0.0821 × 273)

n = 11.74 ÷ 22.41

n = 0.52 mol

There are 0.52 moles in the basketball

6 0
3 years ago
Can someone please help me with this asap <br><br>what is the value of d<br>​
Stella [2.4K]

The value of "d" is 80°

Explanation:

Cyclic quadrilaterals are the special group of quadrilaterals with all its base lying on the circumference of the circle. In other words, a quadrilateral inscribed in a circle is called a cyclic quadrilateral.

Cyclic quadrilateral are characterised by some special features such as

  • Sum of opposite angles of a cyclic quadrilateral is always a supplementary angle.
  • If one of the sides of a cyclic quadrilateral is produced, then the exterior angle so formed is always double of the corresponding interior angle.  

Using the property 1  

We find that since the quadrilateral is cyclic, opposite pairs must be supplementary

100° +∠D must be equal to 180°  

D=180° -100° =80°

7 0
3 years ago
Which of the following is a direct result of global warming that is causing endangerment of polar bears?
frez [133]

increased warmth causing glaciers to melt

you're welcome! :)

3 0
2 years ago
II<br> 5. C2H6<br> In Lewis dot structure
Nonamiya [84]
H H
I I
H - C - C - H
l l
H H

A Carbon can only form 4 bonds and a Hydrogen can only form 1 bond.
8 0
3 years ago
In which pair do both compounds exhibit predominantly ionic bonding?
klasskru [66]

Answer:

In pair NaF and H2O both compounds exibit predominantly ionic bonding.

4 0
2 years ago
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