CHEMISTRY HIGH SCHOOL

What are some of the activities performed during experiment​

Answers

Answer 1
Answer: Make a hypothesis or prediction about the results of the experiment. Determine the methods involved in conducting the experiment. Acquire necessary helpers and materials. Test the materials and the experimental design, as needed, before conducting the experiment.

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Explain why substances with giant covalent structures are solids with high melting and boiling points ?
If 0.25 mol of Br2 and 0.55mol of Cl2 are introduced into a 3.0-L container at 400 K, what will be the equilibrium concentration of BrCl ?? Br2(g)+Cl2(g) 2BrCl at 400 K, Kc= 7.0
Please help me with this question number 22

The ratio of chromium to iron to carbon variesamong the different types of stainless steel.
Therefore, stainless steel is classified as
(1) a compound (3) a mixture
(2) an element (4) a substance

Answers

The correct answer is option 3. Stainless steel is a mixture of different substances. Mixture is defined us a system that is made up of two or more substances which are mixed but are not chemically combined. In stainless steel, the components are not chemically combined.

Answer: mixture

Explanation:

Compound is a pure substance which is made from atoms of different elements combined together in a fixed ratio by mass.It can be decomposed into simpler constituents using chemical reactions. Example: water H_2O

Element is a pure substance which is composed of atoms of similar elements. It can not be decomposed into simpler constituents using chemical reactions.Example: Copper Cu

Mixture is a substance which has two or more components which do not combine chemically and do not have any fixed ratio in which they are present.Example: Alloys

As steel is made up of combination of carbon and chromium and are not present in any fixed ratio , steel is classified as a mixture.

Titanium has five common isotopes: 46Ti (8.0%), 47Ti (7.8%), 48Ti (73.4%), 49Ti (5.5%), 50 Ti (5.3%). What is the average atomic mass of titanium?

Answers

(46x8.0)+(47x7.8)+(48x73.4)+(49x5.5)+(50x5.3) = 4792.3

4792.3/100 = 47.923 this is the average atomic mass of Titanium

Final answer:

The average atomic mass of titanium, calculated by weighting each isotope's mass by its percent abundance, is approximately 47.923 atomic mass units (amu). This aligns closely with the atomic mass on the periodic table of 47.867 amu.

Explanation:

The average atomic mass of titanium can be calculated by weighting each isotope's mass by its percent abundance, which is essentially what an 'average' is. Here is how each isotope of titanium contributes to the average atomic mass:

  • 46Ti: 46 amu * 0.08 = 3.68 amu
  • 47Ti: 47 amu * 0.078 = 3.666 amu
  • 48Ti: 48 amu * 0.734 = 35.232 amu
  • 49Ti: 49 amu * 0.055 = 2.695 amu
  • 50Ti: 50 amu * 0.053 = 2.65 amu

Adding it all up: 3.68 amu + 3.666 amu + 35.232 amu + 2.695 amu + 2.65 amu = 47.923 amu. Therefore, the calculated average atomic mass of titanium is approximately 47.923 amu, which aligns closely with the atomic mass on the periodic table of 47.867 amu.

Learn more about average atomic mass here:

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The atomic mass of titanium is 47.88 atomic mass units. This atomic mass represents the - explain please!

Answers

Okay, let's get this organized. 

Nucleus 
   ↓↓↓↓
Holds the Protons and Neutrons

Orbitals
   ↓↓↓↓
Electrons

Protons ⇒ Positive particle
Electrons ⇒ Negative charged particles 
Neutrons ⇒ No charge

Atomic number → Number of protons in the nucleus
Atomic mass → Protons + neutrons 

Answer: The atomic mass of titanium is 47.88 atomic mass units. This atomic mass represents the number of protons plus neutrons in the atom's nucleus. 

How many moles of H2 are needed to react with 1 mole off N2?

Answers

3 H₂ + N₂ = 2 NH₃

3 moles H₂ ------- 1 mole N₂
? moles H₂ -------- 1 mole N₂

H₂ = 1 * 3 / 1

H₂ = 3 / 1

= 3 moles of H₂

hope this helps!

Technician A says that a leaking head gasket can be tested for by using a chemical tester. Technician B says that a leaking head gasket can be found using an exhaust gas analyzer. Who is correct?

Answers

Answer: Both technicians are correct

Explanation: A chemical tester and exhaust gas analyzer are two important ways to check for gasket leakage

A chemist places a flask containing the reactants in an ice bath. This will _____ the rate of the reaction. increase decrease

Answers

A chemist places a flask containing the reactant in an ice bath. This will decrease the rate of reaction.

Answer:

give them brainliest

Explanation:
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