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2 years ago

Answering the following questions will help you focus on the outcomes of the experiments.

Chemistry

1 answer:

Afina-wow [57]2 years ago

6 0

Answer:

ex.1

1.The water in the test tube expands as it is heated. There is only one direction to expand in, the glass tube. This glass tube is narrow so that a small change in volume will result in a considerable change in height; your signal is amplified. This is the same phenomenon as in thermometers with a glass bulb on the lower end.

2. there will be a thermal expansion will happened.

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What product(s) are formed during the complete combustion reaction that occurs when methane (CH4) and molecular oxygen (O2) reac

Vilka [71]

Answer: CO2 and H2O

Explanation: I already took the test it's right

3 0

3 years ago

Explain reaction of metals with the following with the help of chemical equations; i) with acids ii) with oxygen iii) with water

Cerrena [4.2K]

i. When an acid reacts with metal, a salt and hydrogen are produced:

ii. When oxygen and metal react, metal oxide forms also known as rust

iii. Acid and water produce hydroxide ions

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3 years ago

if one mole of calcium carbonate (the limiting reactant) is used, how much calcium chloride should the reaction produce? look at

salantis [7]

Answer:

The answer to your question is <u>111 g of CaCl₂</u>

Explanation:

Reaction

2HCl + CaCO₃ ⇒ CaCl₂ + CO₂ + H₂O

Process

1.- Calculate the molecular mass of Calcium carbonate and calcium chloride

CaCO₃ = (1 x 40) + (1 x 12) + ((16 x 3) = 100 g

CaCl₂ = (1 x 40) + (35.5 x 2) = 111 g

2.- Calculate the amount of calcium chloride produced using proportions.

The proportion CaCO₃ to CaCl₂ is 1 : 1.

100 g of CaCO₃ ------------- 111 g of CaCl₂

Then 111g of CaCl₂ will be produced.

5 0

3 years ago

Some people have attached earlobes and some people have free earlobes the differences in these traits are caused by

aliya0001 [1]

Answer:

Genetics

Explanation:

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3 0

3 years ago

Read 2 more answers

Calculate the molarity of a solution containing 15.2 grams of nacl dissolved in 2.5 l of solution

topjm [15]

Answer:

THE MOLARITY OF THE SOLUTION IS 0.1039 MOL/DM3

Explanation:

Molarity is the number of moles of solute in a given solution,

Molarity in mol / dm3 = Molarity in g/dm3 / Molar mass

Mass = 15.2 g

Volume of solution = 2.5 l

Molar mass of NaCl = (23 + 35.5) = 58.5 g/mol

First, we calculate the molarity in g/dm3

Molarity in g/dm3 = mass /volume

= 15.2 g * 1 L / 2.5 L

=6.08 g /dm3

Hence, we will introduce the values and solve for molarity in mol/dm3

Molarity = 6.08 g/dm3/ 58.5 g/mol

Molarity = 0.1039 mol/dm3

The molarity of the solution is 0.1039 mol/dm3

3 0

2 years ago