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slega [8]
3 years ago
14

6 List What are two advantages and two limitations of physical models? Plz help

Chemistry
1 answer:
-BARSIC- [3]3 years ago
8 0

Answer:

Physical models can represent objects or systems that are too small, too big, or too far away to study. They are way easier, cheaper, and safer to work with or use when compared to the real objects that they represent.

Explanation:

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9. Which one of the following is not a potential effect of global warming?
valentina_108 [34]

Answer:

D. Increase in UV radiation​

Explanation:

I hope it helps. brainliest pls

5 0
2 years ago
What is the mass of a sample of a sample of iron (cp=0.44j/g•°C) when it is heated from 60°to 160°C. The heat is transferred is
scZoUnD [109]

Q=mcat

6600=(m)(.44)(100)

6600=(44m)

150= m

5 0
3 years ago
How many milligrams of a 20mg sample of cesium-137 remain after 60 years
andrey2020 [161]
Cs -137 has a half life of about 30 years. If 60 years pass, there is two half lives passed so 1/2 * 1/2= 1/4. Take 1/4 and multiply it with the mass given:
(1/4)*20mg=5mg left
5 0
3 years ago
Determine the number of grams of C4H10 that are required to completely react to produce 8.70 mol of CO2 according to the followi
Nitella [24]

Answer:

126.4 g of C_{4}H_{10} are required

Explanation:

Balanced reaction: 2C_{4}H_{10}+13O_{2}\rightarrow 8CO_{2}+10H_{2}O

According to balanced reaction-

8 moles of CO_{2} are produced from 2 moles of C_{4}H_{10}

So, 8.70 moles of CO_{2} are produced from (\frac{2}{8}\times 8.70) moles of C_{4}H_{10} or 2.175 moles of C_{4}H_{10}

Molar mass of C_{4}H_{10} = 58.12 g/mol

So, mass of C_{4}H_{10} required = (2.175\times 58.12)g = 126.4 g

Hence 126.4 g of C_{4}H_{10} are required

5 0
3 years ago
What is the chemical formula of trisilicon tetranitride? A. Si3N4 B. Si4N3 C. Si3N6 D. Si6N3 E. Si4N6 Reset Next
kherson [118]

The answer is Si3N4 (A).

5 0
4 years ago
Read 2 more answers
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