Answer:
c . Letting the fizz escape from a soda
True
a change of state occurs when thermal energy is added or taken away from a system.
Answer:
v = 10.42 mL
mass = 11.986 g
Explanation:
Given data;
Mass of lotion needed in pound = 0.0264 lb
Density of lotion = 1.15 g/mL
Mass of lotion needed in gram = ?
Volume of lotion needed in mL = ?
Solution:
Mass of lotion needed in gram :
1 pound = 454 g
0.0264 lb × 454 g/ 1lb = 11.986 g
Volume of lotion needed in mL :
d = m/v
1.15 g/mL = 11.986 g / v
v = 11.986 g /1.15 g/mL
v = 10.42 mL
Answer:
Can I get my 50 points now?
Explanation:
The helium is formed during the natural radioactive decay of elements such as uranium and thorium. These heavy elements were formed before the earth but they are not stable and very slowly, they decay. One mode of decay for uranium is to emit an alpha-particle.
Answer:
We need 1.714 moles N2
Explanation:
Step 1: Data given
The reaction yield = 87.5 %
Number of moles NH3 produced = 3.00 moles
Step 2: The balanced equation
N2(g)+ 3H2(g) →2NH3(g)
Step 3: Calculate moles N2
For 2 moles NH3 produced we need 1 mol N2 and 3 moles H2
This means, if the yield was 100%, for 3.00 moles NH3 produced , we need 1.5 moles N2
For a 87.5 % yield:
we need more N2, increased by a ratio of 100/87.5.
100/87.5 * 1.5 = 1.714 moles N2
