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Aliun [14]
3 years ago
9

Which statement best describes how an existing theory is often affected by the development of new technology?

Chemistry
1 answer:
grigory [225]3 years ago
4 0

Answer: An existing theory is modified so that it can explain both the old and new observations.

Explanation:

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10. Give the number of protons, electrons, and neutrons in strontium-88.
aleksley [76]

Answer:

C.because protons and electrons are equal they will be 38 so neutron will be 50

4 0
3 years ago
Balance the following equation. Then determine the mole ratio of Ca(OH)2:Al(OH)3.
DENIUS [597]
Balanced equation:

Al2(SO4)3 +3 Ca(OH)2 ---> 2Al(OH)3 + 3CaSO4?

Check:
Left side: Al:2; [SO4]: 3; Ca: 3; [OH] 3*2 = 6

Rigth side: Al: 2; [OH]: 2*3 = 6; Ca:3; [SO4]: 3

Mole ratio of Ca(OH)2 : Al (OH)3

3 moles of Ca(OH)2: 2moles of Al(OH)3 = 3:2

Answer: Option B.

4 0
4 years ago
Select all of the answers that apply. Without its atmosphere, Earth would be _____. warmer bombarded by meteorites similar to Ma
Papessa [141]
Without its atmosphere, Earth would be bombarded by meteorites, similar to mars, relatively lifeless. Without the atmosphere objects can just enter the atmosphere and cause serious harm to us, but with the atmosphere it basically reduces damage and shrinks it to size. Without the atmosphere earth would be like mars since it doesn't have a atmosphere. Without the atmosphere earth would be relatively lifeless since without air, us humans cant breathe so we will not survive.

6 0
3 years ago
Read 2 more answers
Help please. I beg you
Nookie1986 [14]

Answer:

hello

Explanation:

second option is correct answer

6 0
3 years ago
how many moles of gas does it take to occupy 120 liters at a pressure of 2.3 atmospheres and a temperature of 340 K?
dezoksy [38]
Data:

P (pressure) = 2.3 atm
V (volume) = 120 L
T (temperature) = 340 K
n (number of mols) = ?
R (Gas constant) = 0.082 (atm*L/mol*K)

Formula: 

p*V = n*R*T

Solving:
p*V = n*R*T
2.3*120 = n*0.082*340
276 = 27.88n
27.88n = 276
n = \frac{276}{27.88}
n = 9.89956...\to \boxed{\boxed{n\approx 9.90\:mols}}\end{array}}\qquad\quad\checkmark


7 0
4 years ago
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