Answer:
ionic bond, also called electrovalent bond, type of linkage formed from the electrostatic attraction between oppositely charged ions in a chemical compound. Such a bond forms when the valence (outermost) electrons of one atom are transferred permanently to another atom.
Explanation:
The molar mass is the mass of all atoms in a molecule we first obtain the atomic weights from the individual elements in a periodic table then count the number of atoms and multiply it by the individual atomic masses
<u>Answer</u>:
Re-action of the working fluid may exceed the thrust force of the rocket.
<u>
</u><u>Explanation:</u>
A force that moves the rocket through the air present and then through space is known as thrust. This being generated by the 'propulsion system' of the rocket with newton’s third law of motion.
In the propulsion system, the engine works on the gas or liquid and that is further accelerated for working of the engine. This working fluid expelled in one direction whereas, the thrust force is applied in another direction may help in exceeding the weight of the rocket.
Answer:
When there is an increased number of sun spots, it means the surface temperature is decreased which will decrease the temperature of the Earth's surface as well.
Explanation:
Sunspots are temporary phenomena on the Sun's photosphere that appear as spots darker than the surrounding areas. They are regions of reduced surface temperature caused by concentrations of magnetic field flux that inhibit convection. Sunspots usually appear in pairs of opposite magnetic polarity.
The answer is "...one kilogram of a 2.5% KI solution would contain 25 grams of KI."
Explanation:
A 2.5% by mass potassium iodide KI solution is equal to 2.5 grams of KI divided by 100 grams of the KI solution and then multiply by 100, that is
2.5% by mass = [2.5grams KI / (100grams KI solution)] *100
We multiply the mass of the solute and the mass of the solution by 10 each so that 100 grams becomes 1000 grams.
2.5% by mass = [(2.5grams KI * 10) / (100grams KI solution * 10)] *100 = (25grams KI / 1000grams KI solution) *100
Since 1000 grams is equal to 1 kg, the expression becomes
2.5% by mass = (25grams KI/1kg KI solution) *100
The expression above shows that a 2.5% by mass KI solution would contain 25 grams of potassium iodide in 1 kilogram KI solution.
