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
ch4aika [34]
3 years ago
9

Why do substances burn with or without flame?

Chemistry
2 answers:
aliya0001 [1]3 years ago
8 0
It burns with flames because of the presence of oxygen and without flame because when there is every tendency that dry substances can burn due to intense sunlight on it especially a Sulphuric substance
Gala2k [10]3 years ago
7 0
Flame (fire) is the effect of a chemical reaction that produces visible light and heat. The chemical reaction is going on in the substance being burned.. Thats why coals glow and flames seem to leap into the air. 

<span>If your reaction does not have a flame, then either it is not producing visible light or the reaction does not occur in the air above the substance.</span>
You might be interested in
*WILL GIVE BRAINLIEST TO CORRECT ANSWER *<br> Question in picture
sineoko [7]
The Answer for this question is : A

1 & 2
5 0
2 years ago
Read 2 more answers
How far is Louisville from the nearest oil field?​
rjkz [21]

Answer:

anyywhere between 20-23 miles

Explanation:

it depends what type of oil field u mean

7 0
3 years ago
Read 2 more answers
What mass of ammonia can be produced if 13.4 grams of nitrogen gas reacted ?
aivan3 [116]

Answer:

If 13.4 grams of nitrogen gas reacts we'll produce 16.3 grams of ammonia

Explanation:

Step 1: Data given

Mass of nitrogen gas (N2) = 13.4 grams

Molar mass of N2 = 28 g/mol

Molar mass of NH3 = 17.03 g/mol

Step 2: The balanced equation

N2 + 3H2 → 2NH3

Step 3: Calculate moles of N2

Moles N2 = Mass N2 / molar mass N2

Moles N2 = 13.4 grams / 28.00 g/mol

Moles N2 = 0.479 moles

Step 4: Calculate moles of NH3

For 1 mol N2 we need 3 moles H2 to produce 2 moles NH3

For 0.479 moles N2 we'll produce 2*0.479 = 0.958 moles

Step 5: Calculate mass of NH3

Mass of NH3 = moles NH3 * molar mass NH3

Mass NH3 = 0.958 moles * 17.03 g/mol

Mass NH3 = 16.3 grams

If 13.4 grams of nitrogen gas reacts we'll produce 16.3 grams of ammonia

3 0
3 years ago
According to the Arrhenius concept, which of the following substances is NOT a base in aqueous solutionsA. NH3B. LiOHC. NaOHD. H
olga_2 [115]

Answer:

NH₃ (Option A)

Explanation:

Arrhenius theory explained that the acids are the ones that have H⁺, either H in its formula. Following this, the bases are the ones that have OH⁻ , either OH and its formula.

It can be used only with compounds with H, or OH.

So the ammonia is not a base, as Arrhenius theory.

It is known that ammonia behaves as a weak base, but it does not have hydroxide ions that can yield to water

5 0
3 years ago
You have added IgG-sensitized red cells to the negative indirect antiglobulin test result of the antibody screen procedure. You
Ivanshal [37]

Answer:

Positive

Explanation:

The antibody screen interpretation is positive. That's because of clump formation when antibody reacts with the antigen and agglutination occurs.

It means that the antibodies were present in the sample that react with the antigen present in the test tube.

5 0
3 years ago
Other questions:
  • The ph of a 0.30 m solution of an acid, ha, is 5.20. calculate ka of ha.
    8·1 answer
  • Return the first n&gt;0 elements of list l. assume the list elements are numbered from 1 to n
    10·1 answer
  • Give the formula of a compound in unpolluted air
    11·1 answer
  • Which of the following is the best name for a compound made from nitrogen and oxygen? (N2O3) nitrogen oxide nitrogen II oxide ni
    5·2 answers
  • Glass of orange juice contain 0.90 dL of juice. How many milliliters of orange juice is that?
    14·1 answer
  • What is the half-life of polonium-210 if it takes 828 days for a sample to be reduced to 1.6% of its original mass?
    14·1 answer
  • Heat generated by Friction
    11·1 answer
  • Suppose you start with one liter of vinegar and repeatedly remove 0.08 L, replace with water, mix, and repeat. a. Find a formula
    11·1 answer
  • Which of the following the parts of the cell is made up of lipoprotein? A)ribosomes B)plasma memeberanes C)cell wall D)DNA​
    10·1 answer
  • OMG PLS HELP ASAP!! It’s my FINAL and I need help. PLS!!
    7·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!