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
Alex Ar [27]
3 years ago
6

A firework exploding is an example of a (4 points) physical change chemical change phase change nuclear change

Chemistry
1 answer:
Irina-Kira [14]3 years ago
5 0
A firework exploding is a chemical change as soon as you light the fuse the combustion reacts with the gunpowder.

I hope this helps, good luck!!!!
You might be interested in
A particular first-order reaction has a rate constant of 1.35 × 102 s-1 at 25.0°C. What is the magnitude of k at 95.0°C if Ea =
never [62]

Answer:

k ≈ 9,56x10³ s⁻¹

Explanation:

It is possible to solve this question using Arrhenius formula:

ln\frac{k2}{k1} = \frac{-Ea}{R} (\frac{1}{T2} -\frac{1}{T1} )

Where:

k1: 1,35x10² s⁻¹

T1: 25,0°C + 273,15 = 298,15K

Ea = 55,5 kJ/mol

R = 8,314472x10⁻³ kJ/molK

k2 : ???

T2: 95,0°C+ 273,15K = 368,15K

Solving:

ln\frac{k2}{k1} = 4,257

\frac{k2}{k1} = 70,593

{k2} = 9,53x10^3 s^{-1}

<em>k ≈ 9,56x10³ s⁻¹</em>

I hope it helps!

5 0
3 years ago
Valence Bond theory predicts that tin will use what hybrid orbitals in Snf5 -1​
LUCKY_DIMON [66]

Answer:

sp3d

Explanation:

The ground state electronic configuration of tin is written as; [Kr] 5s²4d¹⁰5p². Hybridization is a concept used to explain the combination of orbitals of appropriate energy to produce suitable orbitals that could be used for bonding.

In forming the compound Snf5^ -1, we have to hybridize the following orbitals on tin; 5p, 5d and 6s orbitals. This gives us a set of sp3d hybrid  hence the answer.

6 0
2 years ago
Match each vocabulary term with the correct definition
Ilia_Sergeevich [38]

Answer:

Amplitude ----> C.) The distance from a crest or trough to the rest position on the horizontal axis

Crest ---> A.) The highest point of a wave

Destructive interference ---> E.) A situation in which the crest of one wave and the trough of another overlap, resulting in a wave that has a smaller amplitude than the original waves

Sound Wave ---> B.) A vibration transmitted through an elastic medium, such as a gas, liquid, or solid

Trough ---> D.) The lowest point of a wave

8 0
2 years ago
Read 2 more answers
Match each scientist to their discovery regarding the atom
neonofarm [45]

Answer:

Thomson--atoms cotain electron

Ernest Rutherford--atoms have a positive nucleus

R.A Millikan--electrons have Q=-1

Dalton--atoms are indivisible

3 0
3 years ago
Read 2 more answers
The device shows the relative humidity at 22°
sergeinik [125]
The relative humidity shows us saturation of water in air. Since it is 58% and not 100% we have to scale density that we were given when humidity is 100%.

At 100% humidity, density is 20grams/cubic meter

at 58% it will be:
0.58 * 20 = 11.6 g/m^3

Since the question is to find density, the answer cannot be in %.

Answer is 11.6 g/m^3
4 0
3 years ago
Read 2 more answers
Other questions:
  • What is the mass in 6.34x10^23 molecules of calcium chloride
    12·1 answer
  • An isotope of manganese has 25 protons and 30 neutrons. What is the mass number of this isotope?
    8·1 answer
  • Answer for this question
    13·1 answer
  • Balance the following reaction. As2S3 + 9O2 → 2As2O3 + SO2
    5·2 answers
  • A 4.000 g sample of iron was heated from 0.0°C to 21.0°C. If it has a specific heat of 0.440 kJ/kg °C, how many kilojoules of he
    5·1 answer
  • The mass numbers for two isotopes are unequal because they have different numbers of
    9·2 answers
  • one part of dalton's atomic theory states: compounds are formed by combinations of atoms from two or more elements. is this stat
    14·1 answer
  • What form of matter is made of only one type of atom
    7·1 answer
  • Anybody know what Crystal this is?
    13·1 answer
  • A bar of copper (Copper = 0.385 J/g.°C) and a bar of aluminum (Aluminum = 0.897 J/g.°C) have the same mass. Which requires more
    10·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!