Answer:
x=-1
Explanation:
1. Simplify brackets.
2x+3×6x=−20
2. Simplify 3×6x to 18x.
2x+18x=−20
3. Simplify 2x+18x to 20x.
20x=−20
4. Divide both sides by 20.
x=−1
Answer:
C) a log in the campfire turns into ashes
<span>The mass of 1.73 moles CaH2 is 72.82 grams. The molar mass of CaH2 is 42.08 g/mol. This means that there are 42.09 grams in 1 mol. So, x grams will be in 1.73 mol of CaH2. Let's make a proportion: 42.09 g : 1 mol = x : 1.73 mol. x = 42.09 g * 1.73 mol : 1 mol. x = 72.82 g.</span>
D. would be my guess im almost positive that its right
Answer: 
is the correct equation for beta decay.
Explanation:
When a beta particle, that is, 
is emitted in a radioactive decay then it is known as beta decay.
Therefore, beta decay of Polonium-218 is as follows.
Therefore, we can conclude that is the correct equation for the given beta decay.
