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
kumpel [21]
3 years ago
7

Which element is always present in a combustion reaction?

Chemistry
2 answers:
ikadub [295]3 years ago
6 0
I think the answer is oxygen is correct.
diamong [38]3 years ago
4 0
The element <u>Oxygen</u> is always present in a combustion reaction.
You might be interested in
If I add 2.75 g of CaO to 155 mL of distilled water, what will be the concentration of the solution be?
IRINA_888 [86]
M = m/L
moles of CaO = 2.75g / molar mass
2.75g/ 56.08g = 0.049moles CaO
155mL / 1000 = 0.155 L
M= 0.049moles/0.155L
M=0.316
7 0
2 years ago
In an electron-dot structure of an element, the dots are used to represent ________.
Vlad [161]
Dots are used to represent electrons.
3 0
3 years ago
How does an embryo develop from a fertilized egg?]
faltersainse [42]

Answer: Hope this helps

<h3>Explanation: <u><em>The fertilized egg zygote divides repeatedly as it moves down the fallopian tube to the uterus. First, the zygote becomes a solid ball of cells. ... Inside the uterus, the blastocyst implants in the wall of the uterus, where it develops into an embryo attached to a placenta and surrounded by fluid-filled membranes.</em></u></h3><h3><u><em /></u></h3>
6 0
3 years ago
What is the first step in nuclear fission?
lys-0071 [83]

Answer:

energy is released

Explanation:

8 0
3 years ago
Help would be majorly appreciated
Sophie [7]

Answer:

a) the atomic number is 15

b) the mass number is 15+16 = 31

c) element is phosphorus

d)Group 15 period 3

6 0
2 years ago
Other questions:
  • A car rolls down a ramp. What is the force acting on the car that causes the movement down the ramp?
    6·1 answer
  • How many grams of KCl are needed to prepare 1.00 L of a 2.00 M solution
    9·1 answer
  • Why does summer receive more daylight hours than winter
    11·2 answers
  • How does the addition of salt to solid ice affect the melting transition from solid to liquid?
    15·2 answers
  • Calculate the osmotic pressure of a magnesium citrate laxative solution containing 25.5 g of magnesium citrate in 244 mL of solu
    6·1 answer
  • Copper (ii) carbonate and sulfuric acid react to make copper (ii) sulfate, carbon dioxide and water
    11·1 answer
  • How many moles are in an 8.40 grams of a non electrolyte solution
    5·1 answer
  • Astronomers observed that the orbit of Uranus was not uniform. Therefore, they hypothesized the existence of another planet. Thi
    7·1 answer
  • PLEASE HELP!! <br> this is on USAtestprep <br> a)<br> b)<br> c)<br> d)
    7·1 answer
  • How many moles of sodium sulfate will be formed if you start with 3.7 moles of sodium hydroxide?
    11·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!