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STALIN [3.7K]
3 years ago
12

Write the chemical equation: hydrogen peroxide decomposes to yield oxygen gas and water.

Chemistry
1 answer:
Doss [256]3 years ago
6 0

Explanation:

2 H2O 2 → 2H 2 O + O2.........

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How many atoms are in a sample of 72.8 g calcium (Ca)?
xxMikexx [17]
Atomic mass Ca = 40.078 a.m.u

40.078 g -------------------- 6.02x10²³ atoms
72.8 g ---------------------- ??

72.8 x ( 6.02x10²³) / 40.078 =

4.38x10²⁵ / 40.078 = 1.093x10²⁴ atoms

hope this helps!
5 0
3 years ago
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A blank is a coil of wire that produces a magnetic field when it carries an electric current
Lostsunrise [7]

A spring - also an electromagnet. Also know as a slinky!

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Plutonium-240 decays according to the function \[Q(t)=Q _{o}e ^{-kt}\] where Q represents the quantity remaining after t years a
marishachu [46]
To answer the question above, substitute the given values to the given equation,
                                   Q(t) = Q x e^-kt
  
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4 0
3 years ago
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What is the maximum amount of HCl, in grams, that can be produced if 37.5 g of BCl3 and 60.0 g of H2O are reacted according to t
Rus_ich [418]
Ooooh boy alright. So, this may or may not be a limited reactant problem so we need to first find out of it is.

First, how many moles of each substance are there

the molar mass of BCl3 is <span>117.17 grams so 37.5 g / 117.17 is ~ .32 mol.
The molar mass of H2O is 18.02 so 60 / 18.02 is ~ 3.33 mol.

Now, for every 1 mole of BCl3, there are 3 moles of HCl created. Therefore, BCl3 can create ~ .96 moles.
For every 3 moles of H2O, there are 3 moles of HCl created. Therefore, HCl can create ~3.33 moles.

But, there is not enough BCl3 to support that 3.33 moles, only enough for .96 moles, therefore BCl3 is the limiting reactant. Now, to answer the question, simply multiply .96 moles by the molar mass of HCl.

.96 x 36.46 = ~35 g</span>
6 0
3 years ago
Calculate the density in g/mL of 2.0L of gasoline that weighs 1.26 kg
quester [9]
2.0 L in mL :

2.0 x 1000 => 2000 mL 

1.26 kg in g :

1.26 x 1000 => 1260 g

D = mass / volume

D = 1260 / 2000

D = 0.63 g/mL

hope this helps!

5 0
3 years ago
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