Answer:
9√3
Explanation:
Given that :
UV = 18
Angle V = 60°
To obtain the measure of UW = v
Using trigonometry :
Sinθ = opposite / hypotenus
Sinθ = UW / 18
θ = 60°
sin60° = UW / 18
Sin 60° = √3/2
√3 /2 = UW / 18
UW = 18 * √3/2
UW = 9 * √3
UW = 9√3
The species that represents an ion is B³+ (option A).
<h3>What is an ion?</h3>
An ion is an atom or group of atoms bearing an electrical charge, such as the sodium and chlorine atoms in a salt solution.
Simply put, an ion is said to be an electrically charged atom. This refers to the difference in the number of protons and electrons in the atom of an element.
According to this question, the species with an electrical charge is B³+, hence, it represents an ion.
Learn more about ion at: brainly.com/question/14982375
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To go from molecules, we first need to convert to moles and then convert to grams.
To convert from molecules to moles, we need to divide by Avogadro's constant.
1.15*10^21 molecules * (1 mole/6.022*10^23 molecules) = 0.0019097 moles
To convert from moles to grams, we need to use the molar mass.
The molar mass of P₂O₅ is (2*30.98)+(5*16.00) = 141.96
You can find the molar mass using the periodic table.
0.0019097 moles * (141.96 grams/1 mole) = 0.2711 grams.
Since we have 3 significant digits in 1.15*10^21, that means our final answer is limited to 3 significant digits.
Your final answer is 0.271 grams.
Answer:
The amount of kinetic energy an object has depends on its
Motion
Explanation:
Only kinetic energy increases when the velocity of an object increases.
Answer:
1+
Explanation:
the number of protons tells you which element it is in the periodic table, you can notice that there is 1 less electron that then there is protons which means that the element had to give 1 electron away. When you get rid of 1 e- you have 1 proton more that electrons so that's why it's 1+
also the element is Cr
