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Elan Coil [88]
2 years ago
8

Describe how oxides of nitrogen are produced when petrol is burned in car engines !!HELP!!

Chemistry
1 answer:
KIM [24]2 years ago
8 0

Answer:

Answer is on the pic

Explanation:

I hope it's helpful!

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Which of these compounds are used to reduce acidity of soil
Nataliya [291]
<h2>Answer:  Calcium Oxide and Calcium Hydroxide</h2>

Explanation:

To reduce the acidity of the soil, bases are used.

Calcium Oxide and Calcium Hydroxide are two such bases that are often used.

4 0
2 years ago
1. Coal gasification consists of the chemical transformation of solid coal into gas. The heating values of coal differ, but the
creativ13 [48]

Complete question:

Coal gasification consists of the chemical transformation of solid coal into gas. The heating values of coal differ, but the higher the heating value, the higher the value of the gas produced (which is essentially methane, carbon monoxide, hydrogen, etc.). The following coal has a reported heating value of 29,770 KJ/Kg as received. Assuming that this is the gross heating value, calculate the net heating value.. Component__________Percent  C___________________71

H2__________________5.6

N2__________________1.6

S____________________2.7

Ash__________________6.1

O2___________________13

Answer:

LHV = 28478.8 KJ/kg

Explanation:

The gross heating value is also the higher heating value (HHV), while the net heating value is the lower heating value (LHV).

This involves the conversion from higher heating value (HHV) to lower heating value(LHV).

Let's use the formula:

LHV = HHV - 0.212H - 0.0245M - 0.008A

We are given

HHV = 29,770 KJ/kg = 29.770MJ/kg

H = hydrogen% =5.6%

A = oxygen% = 13%

M = 0

Substituting the figures in the formula, we have:

LHV = 29.770 - 0.212*5.6 - 0.0245*0 - 0.008*13

= 29.770 - 1.1872 - 0 - 0.104

= 28.4788 MJ/kg

= 28478.8 KJ/kg

LHV = 28478.8 KJ/kg

The net heating value, LHV = 28478.8 KJ/kg

3 0
2 years ago
classify each solution as either an acid or a base using the properties that are stated. what are two ways these solutions are s
USPshnik [31]
Probably too late to help but solution a is likely a base while solution b is an acid.

two similar things: both are aqueous solution and they are not neutral.
6 0
3 years ago
I need halp with this one
Travka [436]

Pangea was formed in the Paleozoic Era

8 0
2 years ago
All of the following can increase the rate of chemical reaction EXCEPT:
dangina [55]

Except catalyst because catalyst typically speed up a reaction by reducing the activation energy or changing the reaction mechanism.

5 0
3 years ago
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