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USPshnik [31]
3 years ago
12

In both the Japanese and San Francisco earthquakes, fire killed more people than collapsing buildings. Why do you think this was

the case?
Chemistry
2 answers:
Bingel [31]3 years ago
8 0

Answer: because it was a high level quake

Explanation:

Paha777 [63]3 years ago
5 0
In both the Japanese and San Francisco earthquakes, fire killed more people than collapsing buildings. This was probably a result of the both cities having most buildings constructed of wood, rather than a more fire proof material. The wood buildings fueled the fires rather than slowing them and trapped the people inside with no escape route. Although plenty of buildings collapsed during both earthquakes, fire is more lethal than debris and people could stay alive under rumble long enough until help came whereas the large fires in the cities made it hard for rescuers to keep people alive in burning buildings.
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How many moles of gas Does it take to occupy 520 mL at a pressure of 400 torr and a temperature of 340 k
Lubov Fominskaja [6]
Answer would be B. I provided work on an image attached. Message me if u have any other questions on how to do it

3 0
3 years ago
Manganese(II) oxide, lead(IV) oxide, and nitric acid react to produce permanganic acid, lead(II) nitrate, and water according to
Leokris [45]

Answer:

There will be produced:

2.97 moles HMnO4

4.45 moles Pb(NO3)2

2.97 moles H2O

Explanation:

Step 1: Data given

Manganese(II) oxide = MnO2

lead(IV) oxide = PbO2

nitric acid = HNO3

Moles of HNO3 = 8.90 moles

Step 2: The balanced equation

2MnO2 + 3PbO2 + 6HNO3 → 2HMnO4 + 3Pb(NO3)2 + 2H2O

Step 3: Calculate moles of reactants and products

For 2 moles MnO2 we need 3 moles PbO2 and 6 moles HNO3 to produce 2 moles HMnO4, 3 moles Pb(NO3)2 and 2 moles of water

For 8.90 moles of HNO3, there will react:

8.90 / 3 = 2.97 moles MnO2

8.90 / 2 = 4.45 moles PbO2

There will be produced:

8.90/3 = 2.97 moles HMnO4

8.90/2 = 4.45 moles Pb(NO3)2

8.90 / 3 = 2.97 moles H2O

7 0
3 years ago
Which of these is an example of a physical change?
miv72 [106K]
Sugar dissolving in warm water because when the sugar dissolves you can get the sugar back by letting the water evaporate.,
7 0
3 years ago
Read 2 more answers
Would your results be he same if 1.5 g of barium chloride was used instead of 1.3 g? same with 0.7 g of barium chloride?
pickupchik [31]
For a chemical reaction, the results would be the same with different amounts of barium chloride present if barium chloride is not the limiting reactant of the reaction. The limiting reactant is the substance that is totally consumed when the reaction proceeds to completion. In other words, it dictates the amount of products that will be produced. Otherwise, if barium chloride is the limiting reactant, the amount of barium chloride present would definitely affect the results.  
6 0
3 years ago
An electron jumps from energy level 1 to energy level 2 by absorbing a photon of energy 8 eV. What is the most likely energy of
Mkey [24]

Answer:

C. 8 eV

Explanation:

In atoms, the energy of each level is quantised. That is one of the reasons why an electron can not exist between energy levels. Thus, when the electron absorbs energy of 8 ev, it get excited and jumps to energy level 2 which has the current value of energy of the electron.

Thus for the electron to move back to its initial energy level, it must emit the exact energy absorbed for its excitation. Therefore, the likely energy of the photon that will be emitted is 8 ev. This would make the electron to have energy that would make it to exist on energy level 1.

5 0
3 years ago
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