3-chloropropylamine what is?

The four lines observed in the visible emission spectrum of hydrogen tell us that: a. We could observe more lines if we had a st

Aliun [14]

Answer:

c. Only certain energies are allowed for the electron in a hydrogen atom

Explanation:

Emission spectrum are produced when the excited electron in a atom release the energy in the form of photons to come to ground state. These photons are of different wavelengths depending on the excitation state of emitting electron or transition of electron. These electromagnetic radiation are observed through prism to produce the spectrum.

As the name indicates this spectrum is produced by emission of energy. Although the electron can be excited by different methods such as by heating but the key point is that electrons in hydrogen atom will emit the photons of same energy which they absorb and each electron can absorb only certain type of energy. So four lines were observed in the visible spectrum of hydrogen because only certain energies are observed for hydrogen atom.

6 0

3 years ago

The specific heat of a certain type of metal is 0.128j/(g.c). What is the final temperature if 305.J of heat is added to 72.7g o

expeople1 [14]

E answer is -60.57 = -60.6 KJ.
CaC2(s) + 2 H2O(l) ---> Ca(OH)2(s) +C2H2(g) H= -127.2 KJ
Hf C2H2 = 226.77
Hf Ca(OH)2 = -986.2
Hf H2O = -285.83
Now,

add them up. 226.77 - 986.2 + (2*285.83) = -187.77
Add back the total enthalpy that is given in the question
-187.77+127.2 = -60.57

3 0

2 years ago

Which of the following elements is the largest?

Leya [2.2K]

Answer:

oxygen i think so......

Explanation:

i did the same question on my test

3 0

2 years ago

Read 2 more answers

read carefully and do this questions all part all questions if someone do this questions I will make you brainly and give you th

rosijanka [135]

Answer:

Question 1.

a. the product of the reaction above that contains calcium is calcium chloride, CaCl₂.

b. hydrochloric acid, HCl is the reactant that contains hydrogen

c. the product water, H₂O contains hydrogen

d. the reactant, calcium carbonate, CaCO₃ contains carbon

e. The product carbon (iv) oxide contains carbon

Question 2:

a. atoms of hydrogen and oxygen bonded together as a single compound known as water molecules are present at the start of the reaction

b. two molecules of water are present at the start of the reaction

c. two individual atoms of hydrogen and oxygen existing as molecules are present at the end of the reaction.

d. at the end of the reaction, two molecules of hydrogen and one molecule of oxygen are present.

Question 3:

a. total mass of products = 187 g

b. 10 g of magnesium will be found in the magnesium sulfate

Explanation:

Question 1: The equation of the reaction between calcium carbonate and hydrochloric acid is given as follows: + 2HCl ---> CaCl₂ + H₂O + CO₂

a. the product of the reaction above that contains calcium is calcium chloride, CaCl₂.

b. the reactant, hydrochloric acid, HCl contains hydrogen

c. the product water, H₂O contains hydrogen

d. the reactant, calcium carbonate, CaCO₃ contains carbon

e. The product carbon (iv) oxide contains carbon

Question 2: the equation of the reaction in which water is broken down to hydrogen and oxygen is as follows: 2H₂O ----> 2H₂ + O₂

a. atoms of hydrogen and oxygen bonded together as a single compound known as water molecules are present at the start of the reaction

b. two molecules of water are present at the start of the reaction

c. two individual atoms of hydrogen and oxygen existing as molecules are present at the end of the reaction.

d. at the end of the reaction, two molecules of hydrogen and one molecule of oxygen are present.

Question 3: The equation of the reaction between magnesium and sulfuric acid is given as follows: Mg + H₂SO₄ ---> MgSO₄ + H₂

molar mass of Mg = 24.0 g; molar mass of H₂SO₄ = 98.0 g

a. According to the law of conservation of mass, when 37.0 g of magnesium is reacted with 150 g of H₂SO₄, the total mass of products of the reaction = total mass of reactants = 150 + 37 = 187 g

b. if Chinua starts with 10 g of magnesium, the same 10 g of magnesium will be found in the magnesium sulfate

4 0

3 years ago

What is antacids? yeha aavo

lions [1.4K]

Answer:

Antacid

An antacid is a substance which neutralizes stomach acidity and is used to relieve heartburn, indigestion or an upset stomach. Some antacids have been used in the treatment of constipation and diarrhea. Currently marketed antacids contain salts of aluminum, calcium, magnesium, or sodium.

6 0

3 years ago

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