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kaheart [24]
2 years ago
8

Write the following number correct to 2 significant figures: 3644000 Hurry Plz NO TIME!!!

Chemistry
2 answers:
Nadusha1986 [10]2 years ago
8 0
3644000 rounded to 2 significant figures is equivalent to 3.6
Yuri [45]2 years ago
7 0

Answer:

if it's a percent form then the answer will be

66%

3%

88%

Explanation:

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A generator is not required to generate electrical energy when which of the following energy sources is used?
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How many gram of fe in feno3​
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800000

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The rate constant for the decomposition reaction of H2O2 is 3.66 × 10−3 s−1 at a particular temperature. What is the concentrati
Pepsi [2]

Answer:  3.72 M

Explanation:

Expression for rate law for first order kinetics is given by:

t=\frac{2.303}{k}\log\frac{a}{a-x}

where,

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a = let initial amount of the reactant  = 10.0 M

a - x = amount left after decay process = ?

15.0\times 60s=\frac{2.303}{3.66\times 10^{-3}}\log\frac{10.0}{(a-x)}

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\frac{100}{(a-x)}=26.9

(a-x)=3.72M

The concentration of H_2O_2 in a solution after 15.0 minutes have passed is 3.72 M

7 0
3 years ago
What would be the formula for diphosphorus pentoxide ?
aleksley [76]
PbCr04 + P4O10

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3 0
3 years ago
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C3H8(g) + 5O2(g) ⟶ 3CO2(g) + 4H2O(g) H = -2220 kJ If 865.9 g of H2O is produced during this combustion, how much heat is generat
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3 × 10⁴ kJ

Explanation:

Step 1: Write the balanced thermochemical equation

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Step 2: Calculate the moles corresponding to 865.9 g of H₂O

The molar mass of H₂O is 18.02 g/mol.

865.9 g × 1 mol/18.02 g = 48.05 mol

Step 3: Calculate the heat produced when 48.05 moles of H₂O are produced

According to the thermochemical equation, 2220 kJ of heat are evolved when 4 moles of H₂O are produced.

48.05 mol × 2220 kJ/4 mol = 2.667 × 10⁴ kJ ≈ 3 × 10⁴ kJ

5 0
2 years ago
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