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PilotLPTM [1.2K]
3 years ago
8

Which model is most likely used to show something that happens too slowly to see? 1.A model of a weather system 2.A model of mou

ntain formation 3.A model of the area of a circle 4.A model of an architectural building
Chemistry
1 answer:
Anastaziya [24]3 years ago
7 0

Answer:

model of mountain formation

Explanation:

The formation of mountains takes millions of years. This formation of mountains involves so much processes that do not occur quickly.

Hence, a model that can adequately show something that happens very slowly is the model for the formation of mountains.

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Determine the number of moles of a aluminum sample containing 2.89E26 atoms.
Brut [27]

Answer:

Explanation:

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8 0
3 years ago
Convert 7.50 mol of Li₂O to grams
Natali5045456 [20]

Answer:

223.5 g

Explanation:

The formula between the number of moles, mass and Mr can be used to convert moles to grams.

<em>Number of moles = mass ÷ Mr</em>

So, mass = number of moles × Mr

  Mr of Li₂O = (6.9 × 2) + 16 = 29.8

∴ Mass = 7.5 × 29.8 = <u>223.5 g</u>

4 0
2 years ago
How do you know flammability is a chemical property?
Reika [66]
Because flammable objects have certain substances, you know that it is a chemical property. For example, cloth is flammable and has a certain substance that MAKES it flammable. This results in a chemical property.
8 0
3 years ago
Read 2 more answers
A compound is 44.7% P and the rest O. Determine its emperical formula.
svet-max [94.6K]

Answer:  

P₅O₁₂

<em>Explanation:  </em>

Assume that you have 100 g of the compound.  

Then you have 44.7 g P and 55.3 g O.  

1. Calculate the <em>moles</em> of each atom  

Moles of P  = 44.7 × 1/30.97 = 1.443 mol Al  

Moles of O = 55.3 × 1/16.00 = 3.456 mol O  

2. Calculate the <em>molar ratios</em>.  

P: 1.443/1.443 =   1  

O: 3.456/1.443 = 2.395

3. Multiply by a number to make the ratio close to an integer

P:  5 × 1         =  5

O: 5 × 2.395 = 11.97

3. Determine the <em>empirical formula </em>

Round off all numbers to the closest integer.  

P:   5

O: 12

The empirical formula is <em>P₅O₁₂</em>.  

6 0
3 years ago
When an object travels no distance in a large amount of time, the object's speed is _____. A. fast B. slow C. zero
Nata [24]

zero because its not going anywhere its stationary

hope this helped ^_^

8 0
3 years ago
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