Answer:
Opaque → a.no light travels through the material; all light is reflected or absorbed
Translucent → b.some light travels through the material and the image cannot be seen clearly
Transparent → c.all light travels through the material and the image can be seen clearly
Explanation:
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I think its true but im not 100 percent sure
Given parameters:
Number of protons = 1
Number of electrons = 1
Number of neutrons = 1
unknown:
Total charge = ?
Atoms are made up of elementary particles of protons neutrons and electrons.
Protons are the positively charged particles in an atom
Electrons are the negatively charged particles
Neutrons do not carry any charges
To find the total charge on an atom; simply find the difference between the number of protons and electrons.
Total charge = Number of protons - number of electrons
= 1 - 1
Total charge is 0
Therefore, the total charge is zero, 0
Answer: Alpha
Explanation:
Alpha particle form of decay produces a nucleus similar to the element helium. During Alpha decay an atom spits out two protons and two neutrons from its nucleus.
The number of moles of ethanol the chemist will use in the experiment involving 30g of ethanol is 0.65moles.
<h3>How to calculate number of moles?</h3>
The number of moles of a substance can be calculated by dividing the mass of the substance by its molar mass. That is;
no. of moles = mass ÷ molar mass
According to this question, a chemist will use a sample of 30 g of ethanol (CH3CH2OH) in an experiment. The number of moles can be calculated as follows:
Molar mass of ethanol = 12(2) + 1(5) + 17 = 46g/mol
no of moles = 30g ÷ 46g/mol
no. of moles = 0.65moles
Therefore, the number of moles of ethanol the chemist will use in the experiment involving 30g of ethanol is 0.65moles.
Learn more about moles at: brainly.com/question/1458253
