Answer:
HNO₃ =63.0147 g/mol
CaCO₃ = 100.088 g/mol
Explanation:
Molecular mass:
It is the sum of all the atomic masses of the atoms of elements present in a molecule.
For example:
The formula of CaCO₃:
Calcium carbonate consist of one atom of calcium, one atom of carbon and three atoms of oxygen. Thus, its molecular mass would be,
CaCO₃ = 40.078 × 1 + 12.01×1 + 16.00×3
CaCO₃ = 40.078 + 12.01+ 48
CaCO₃ = 100.088 g/mol
The formula of HNO₃:
Nitric acid consist of one atom of hydrogen, one atom of nitrogen and three atoms of oxygen. Thus, its molecular mass would be,
HNO₃ =1.008 × 1 + 14.0067 ×1 + 16.00×3
HNO₃ = 1.008 +14.0067 + 48
HNO₃ =63.0147 g/mol
Answer:
The correct answer is:
A solution feels warm after a cool solid is added to it (C)
Explanation:
Chemical changes among other results in a change of the temperature of the reactants, producing a product of higher temperature (exothermic reaction) or a product of lower temperature (endothermic reaction). In this case, the temperature of the product was higher than the reactants suggesting an exothermic reaction.
The other options however, suggests physical changes rather than a chemical changes;
A. the change of color of the water suggest mixing or water and color molecules.
B. solid changing into liquid is change of state, which is more of a physical change than chemical
D. Filtration is a physical process, hence the change is a physical change.
A kilogram is 1,000 times larger than one gram (so 1 kilogram = 1,000 grams).
A centimeter is 100 times smaller than one meter (so 1 meter = 100 centimeters).
A dekaliter is 10 times larger than one liter (so 1 dekaliter = 10 liters)
A meter gram liter is the base unit
so. kilo-, centi, deka-, and meter grams and liters
Answer:
Healthy ecosystems have an energy source which comes from the sun
-hope this helps! :)
Explanation:
The lack of an outlet will affect the composition of these lakes by causing an accumulation of organic and inorganic nutrients due to decomposition of living materials.
<h3>What is a lake?</h3>
Lake is a small stream of running water or a channel for water.
Lakes are usually a standing body of water or slow moving. This means that some lakes, including the Great Salt Lake and the Dead Sea, have no outlet.
The lack of an outlet will affect the composition of these lakes by causing an accumulation of organic and inorganic nutrients due to decomposition of living materials.
Learn more about lakes at: brainly.com/question/858802
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