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sweet [91]
3 years ago
10

can you please answer this question for my sister cause this is due tommorow and i don't want her falling please tell me the ans

wer.

Chemistry
1 answer:
Papessa [141]3 years ago
8 0
It can be from volcanic ash, or from eroded material transported by rivers or wind.
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A piece of iron is heated to 95.0 celsius and then placed in an insulated vessel containing 250. grams of water at 25.0 celsius.
Nana76 [90]

Answer:

c) 387g

Explanation:

Water;

Mass = 250g

Specific heat = 4.184

Initial Temp, T1 = 25 + 273 = 298K

Final Temp, T2 = 35 + 273 = 308K

Heat = ?

H = mc(T2 - T1)

H = 250 * 4.184 (308 - 298)

H = 10460 J

Iron;

Initial Temp, T2 = 95 + 273 = 368K (Upon converting to kelvin temperature)

Mass = ?

Final Temp, T1 = 35 + 273 = 308

Heat = 10460 (Heat lost by iron is qual to heat gained by water)

Specific heat = 0.45

H = mc(T2-T1)

M = 10460 / [0.45 (308 - 368)]

M = 10460 / 27

M = 387g

7 0
3 years ago
how many grams of oxygen gas are needed to produce 10.0 grams of carbon dioxide according to the balanced equation of CH4
Alinara [238K]
Molar mass of :

O2 = 16 * 2 = 32 g/mol

CO2 = 12 + 16 * 2 = 44 g/mol

<span>Balanced chemical equation :
</span>
1 CH4 + 2 O2 = 1 CO2 + 2 H2O
               ↓              ↓
             2 moles     1 mole

2* 32 g O2 ----------> 1* 44 g CO2
     x g O2 ------------> 10.0 g CO2

44 x = 2 * 32*10.0

44 x = 640

x =  \frac{640}{44}

x = 14.54 g of O2





7 0
3 years ago
To practice for an Ironman competition, John rode his bike for 15 kilometers. How many
puteri [66]

Answer:

15000

Explanation:

1000 Meters in a kilo meter. So multiply 15 by a 1000.

6 0
3 years ago
An element Argon has atomic number 18. Deduce the electronic configuration of the elements and suggest the group to which this e
gulaghasi [49]

Answer:

8th or 0th group known as Noble gases

3 0
3 years ago
Valeric acid is an organic acid composed of carbon, hydrogen, and oxygen. Valeric acid has a molar mass of 102.13 g/mol and is 5
murzikaleks [220]

i have finish with your assignment.

8 0
2 years ago
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