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
avanturin [10]
3 years ago
6

In the 18th century, Italian biologist Lazzaro Spallanzani designed an experiment supporting the hypothesis that gastric juices

are partly responsible for digesting food. Which human illness did Spallanzani's work eventually shed light on? intestinal ulcers mouth ulcers stomach ulcers skin ulcers
Chemistry
2 answers:
AURORKA [14]3 years ago
7 0

Stomach ulcers, I've read it online and I take the test

liberstina [14]3 years ago
4 0

Answer:

stomach ulcers

Explanation:

You might be interested in
Thallium consists of 29.5%Th-203 and 70.5%Th-205. What is the relative atomic mass of thallium?
grin007 [14]
0.295 * 203 = 53.885
0.705 * 205 = 144.525
53.885 + 144.525 = 204.41
The relative atomic mass of Thallium is 204.41 
7 0
3 years ago
Read 2 more answers
If I have 12 protons, how many neutrons and electrons would I need to make a stable atom?
lesantik [10]

Answer:

im pretty sure you need 15 in all but dont get mad it thats wrong, so you would i think need 3 neutrons

Explanation:

3 0
3 years ago
A reaction progress curve has three peaks and two valleys between the peaks. This curve describes a reaction mechanism that invo
katrin [286]
Answer:
            <span>A reaction progress curve has three peaks and two valleys between the peaks. This curve describes a reaction mechanism that involves <u>three elementary reactions</u>.

Explanation:
                   I have drawn the progress curve with three peaks and two valleys. In fact the peaks shows higher energy and valleys show lower energies. So, Let suppose we react A and B. This reaction between A and B results in the formation of C. In this reaction the energies of A and B are less, and during the progress of reaction they cross a transition state of higher energy and forms product C with lower energy which is present at lower valley. This was first reaction. Other two reactions will be followed by conversion of C to D and conversion of D into E.</span>

3 0
3 years ago
Read 2 more answers
At a room temperature a mixture of sand and water can be separated by
Norma-Jean [14]
The misture can be separated by filtration.

5 0
4 years ago
The 1995 Nobel Prize in Chemistry was shared by Paul Crutzen, F. Sherwood Rowland, and Mario Molina for their work concerning th
OLga [1]

Answer:

ΔH = -162.5 kJ.

Explanation:

Hello.

In this case, we first rearrange the reactions:

ClO(g) + O₃(g) ⇒ Cl(g) + 2O₂(g);  ΔH =-122.8 kJ

2O₃(g) ⇒ 3O₂(g);  ΔH=-285.3 kJ

O₃(g) + Cl(g) ⇒ ClO(g) + O₂(g);  ΔH= ?

Thus, we are going to use the Hess law, as an strategy to rearrange the known chemical reactions and thereby compute the enthalpy of reaction of the unknown one.

1. The first reaction must be inverted in order to obtain chlorine as a reactant in the third one, therefore, the enthalpy of reaction becomes positive:

Cl(g) + 2O₂(g) ⇒ ClO(g) + O₃(g);   ΔH = 122.8 kJ

2. Second reaction remains the same:

2O₃(g) ⇒ 3O₂(g);  ΔH=-285.3 kJ

Then, we add them to obtain:

Cl(g) + 2O₂(g) + 2O₃(g) ⇒ ClO(g) + O₃(g) + 3O₂(g)

Whereas we can subtract both oxygen and ozone to obtain the third one:

O₃(g) + Cl(g) ⇒ ClO(g) + O₂(g)

Therefore, the enthalpy of reaction turns out:

ΔH = 122.8 kJ + (-285.3 kJ )

ΔH = -162.5 kJ.

Best regards.

4 0
4 years ago
Other questions:
  • Select all that apply. Which of the following measurements have 1 significant figure?
    9·2 answers
  • A student mixes a spoonful of sugar into a glass of water and stirs until the sugar dissolves completely. Match each substance t
    15·1 answer
  • How many moles are there in 9.6 x 10²⁵ atoms of Oxygen?
    12·1 answer
  • Which one is a true statement about endothermic reactions? A. I need you from an outside source is continuously being added. B.
    8·2 answers
  • Consider the following reaction: 2 H2(g) + 2 NO(g) → 2 H2O(g) + N2(g) If the concentration of NO changed from 0.100 M to 0.025 M
    14·1 answer
  • Does the second picture answer the first one, if not what am i missing, I’m incredibly confused.
    12·1 answer
  • _____ is a gel-like substance enclosed by the cell membrane that contains the cell's organelles. A) chloroplast B) cytoplasm C)
    6·2 answers
  • Solid solution of a metal or nonmetal dissolved in a metal
    6·1 answer
  • radiowaves in the AM region have frequencies in the range 550 to 1600 kilocycles per second (550 to 1600 kh) calculate the wavel
    11·1 answer
  • what do you think would be the chemical formula of a trisaccharide made of three bonded glucose molecules?
    15·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!