Explanation:
Molecular mass of NO2= 14+16×2=46
1 mole NO2 = 46 gm of NO2
9.4 moles of NO2= 46×9.4 gm= 432.4 gm NO2.
Answer:
c. descent with modification
Explanation:
it's a pretty logical explanation.
Answer:
1. 17 protons / 10 neutrons
2. Scandium
3. Negative
Explanation:
1. The bottom number is the same as the atomic number on top of the abbreviation. To find the # of neutrons, subtract the mass number with the number of protons
2. The bottom number (21) is the number of protons AND the atomic number (the a.n & # of pro. are always going to be the same)
3. Always think about this: if you add electrons, you take away charge - if you take away electrons, you add charge
*Idek if these were the correct correct answers but I tried my best*
Answer: 64.71 L. The balloon will have expanded.
Explanation: 1st, sea level is equal to 1 atm. You will then use Boyle’s Law: P1V1=P2V2.
P1= 1 atm
V1= 55 L
P2= 0.85 atm
V2= ?
Now insert the numbers for the letters:
(1)(55)=(0.85)(V2)
55=0.85V2
Divide by 0.85 on both sides:
V2=64.71L
Now, according to Boyle’s Law, when pressure decreases, volume increases. That’s why the balloon inflates rather than deflates.
They want to know if we can colonize Mars since Earth's resources are being more and more limited.