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
chubhunter [2.5K]
3 years ago
9

The blue color in some fireworks occurs when copper chloride is heated to approximately

Chemistry
1 answer:
Sedaia [141]3 years ago
7 0
The correct answer should be 1500 K. I hope I helped.
You might be interested in
There are two steps in the usual industrial preparation of acrylic acid, the immediate precursor of several useful plastics. In
KIM [24]

Answer:

ΔH = -470.4kJ

Explanation:

It is possible to sum 2 or more reactions to obtain the ΔH of the reaction you want to study (Hess's law). Using the reactions:

1. CaC2(s) + 2H2O(l) → C2H2(g) + Ca(OH)2(s)ΔH = −414kJ

2. 6C2H2(g) + 3CO2(g) + 4H2O(g) → 5CH2CHCO2H(g)ΔH = 132kJ

6 times the reaction 1.

6CaC2(s) + 12H2O(l) → 6C2H2(g) + 6Ca(OH)2(s)ΔH = −414kJ*6 = -2484kJ

This reaction + 2:

6CaC2(s) + 3CO2(g) + 16H2O(l) →  + 6Ca(OH)2(s) + 5CH2CHCO2H(g) ΔH = -2484kJ + 132kJ = -2352kJ

As we want to calculate the net change enthalpy in the formation of just 1 mole of acrylic acid we need to divide this last reaction in 5:

6/5CaC2(s) + 3/5CO2(g) + 16/5H2O(l) →  + 6/5Ca(OH)2(s) + CH2CHCO2H(g) ΔH = -2352kJ / 5

<h3>ΔH = -470.4kJ</h3>

4 0
2 years ago
Why is the solar system often referred to as the sun’s family ?
snow_tiger [21]

Answer:the suns family is stars think about how many stars are in the sky there are billons and more billions

Explanation:

7 0
2 years ago
Read 2 more answers
4 and 5 pleaseeee<br> i’ll give brainly
nikitadnepr [17]

Answer:

4.

A. Proton= Positive charge

B. Neutron= Neutral or no charge

C. Electron= Negative charge

5.

Protons and Neutrons are found in the nucleus.

Hope this helps!

5 0
2 years ago
Read 2 more answers
When HCl(g) reacts with NH3(g) to form NH4Cl(s), 42.1 kcal of energy are evolved for each mole of HCl(g) that reacts. Write a ba
stich3 [128]

<u>Answer:</u> The chemical equation is HCl(g)+NH_3(g)\rightarrow NH_4Cl(s)+42.1kCal

<u>Explanation:</u>

There are 2 types of reactions that are classified based on enthalpy change:

  • Endothermic reaction
  • Exothermic reaction

Endothermic reactions: They are defined as the reactions where heat is absorbed by the reaction. The change in enthalpy of the reaction is always positive.

Exothermic reactions: They are defined as the reactions where heat is released by the reaction. The change in enthalpy of the reaction is always negative.

Given values:

Energy released for 1 mole of HCl reacted = -42.1 kCal

The chemical equation for the formation of ammonium chloride follows:

HCl(g)+NH_3(g)\rightarrow NH_4Cl(s)+42.1kCal

8 0
2 years ago
How does oxygen obey the octet rule
Nitella [24]

Answer:

oxygen obey the octet rule when reacting to form compounds by adding 2 electrons.

Explanation:

6 0
1 year ago
Read 2 more answers
Other questions:
  • Observation on which fruit has more acidity: lemons, watermelon and oranges
    7·1 answer
  • Can you Answer the question below
    8·1 answer
  • A change in which property of light will have no effect on whether or not the photoelectric effect occurs
    7·2 answers
  • Which set of characteristics listed below are unique to the inner<br> planets?
    8·1 answer
  • I dunno which one it is could someone help please?​
    13·2 answers
  • What is the energy of an electron in a Li+ ion when an electron moves from n = 2 to n =3?
    12·1 answer
  • Can you help me please​
    14·1 answer
  • Please help me with this
    14·1 answer
  • The Newton is the SI unit for ____.<br> temperature<br> density<br> weight<br> mass
    5·2 answers
  • Observation what happens when you add distill water salt and lemon juice​
    12·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!