Answer:
Calcium chloride (CaCl2) would help me eat my ice cream faster
Explanation:
Addition of salt to ice melts the lowers the freezing temperature of the ice thus melting the ice easily
Adding calcium chloride to my ice cream would help me eat it faster because the melting point of calcium chloride (772°C) is lower than that of sodium chloride (melting point is 801°C). Calcium chloride would melt my ice cream faster because of its lower melting point
The number of atoms that remains after 3 half-lives given that it was originally 300000 atoms is 37500 atoms
<h3>Data obtained from the question</h3>
- Original amount (N₀) = 300000 atoms
- Number of half-lives (n) = 3
- Amount remaining (N) =?
<h3>How to determine the amount remaining</h3>
The amount remaining after 3 half-lives can be obtained as illustrated below:
N = N₀ / 2ⁿ
N = 300000 / 2³
N = 300000 / 8
N = 37500 atoms
Learn more about half life:
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Answer:
Density of irregular object = 1.62 g/mL
Explanation:
Density of a substance = mass of substance /volume of substance
Mass of substance as measured from the scale = 19.37 g
Volume of the object spins determined bynthe displacement method since itnis an irregular object. In this method, the object whose volume is required is immersed in a measuring cylinder containing a known volume of water. The new volume of water after the immersion of the object is recorded. The volume of the irregular object is then obtained by finding the difference between the final and initial volume of water. This is so because a solid immersed in a liquid will displace its own volume of the liquid.
Volume of irregular object = 61.94 mL - 50.0 mL = 11.94 mL
Density of irregular object = 19.37 g / 11.94 mL
Density of irregular object = 1.62 g/mL
Answer:
It is fairly obvious that zinc metal reacts with aqueous hydrochloric acid! The bubbles are hydrogen gas. ... In fact, electrons are being transferred from the zinc atoms to the hydrogen atoms (which ultimately make a molecule of diatomic hydrogen), changing the charges on both elements.
Explanation:
Answer:
They only have one in their valence shell
Explanation: