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Yuliya22 [10]
3 years ago
12

If you drop a rubber ball covered in cooking sheet and fry it on a frying pan on hot temperature will it catch fire or will the

ball melt?
Chemistry
1 answer:
Anni [7]3 years ago
5 0

It will catch fire, the ball won't melt

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4NH3 + 3O2 --> 2N2 + 6H2O
larisa86 [58]

The balanced reaction is:

4NH3 + 3O2 --> 2N2 + 6H2O

 <span>We are given the amount of reactants to be used for the reaction. This will be the starting point of our calculation.</span>

83.7g of O2 ( 1 mol / 32 g) = 2.62 mol O2

2.81 moles of NH3

From the balanced reaction, we have a 4:3 ratio of the reactants. The limiting reactant would be oxygen. We will use the amount for oxygen for further calculations.

<span>2.62 mol O2</span><span> (6 mol H2O  / 3 mol O2) (18.02 g H2O / 1 mol H2O) = 94.42 g H2O</span>

8 0
2 years ago
If you want to lift a 30-kg box to a height of 1 m, how much work will it take?
natta225 [31]

Explanation:

workdone = force x distance

force = mass x acceleration

30 x 10 = 300N

300N x 1m

workdone= 300J

7 0
3 years ago
How many moles of molecules are in 40g of H2O?
soldier1979 [14.2K]
Molecular mass of H2O is: 16+2*1=18
so moles of 40g of H2O is: 40/18=2.22
6 0
3 years ago
Read 2 more answers
As part of her nuclear stress test, Simone starts to walk on the treadmill. When she reaches the maximum level, Paul injects a r
Naya [18.7K]

Answer:

Part A: 36 MBq; Part B: 18 MBq

Explanation:

The half-life is the time it takes for half the substance to disappear.

The activity decreases by half every half-life

A =Ao(½)^n, where n is the number of half-lives.

Part A

3.0 da = 1 half-life

A =  Ao(½) = ½ × 72 MBq = 36 MBq

Part B

6.0 da = 2 half-lives

A = Ao(½)^2 = ¼ × 72 MBq = 18 MBq

3 0
3 years ago
Which of the following blackbody curves is representative of stars like our Sun?
Xelga [282]

Answer:

its letter b

Explanation:

it represents the spectrum of stars

3 0
3 years ago
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