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VikaD [51]
3 years ago
14

During a chemical change items are lost or gained to make new substance true or false​

Chemistry
1 answer:
Otrada [13]3 years ago
5 0

Answer:

If you meant Atoms then the answer is false

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Octasulfur reacts with pure oxygen to produce sulfur dioxide. Determine the percent
Margaret [11]

Answer:

Octasulfur is just S8. Eight S atoms in

a sort of crown shape. Sulfur Dioxide is a gas, SO2. Does that help?

Explanation:

5 0
3 years ago
When 0.513 g of biphenyl (c12h10 undergoes combustion in a bomb calorimeter, the temperature rises from 26.3 ?c to 29.7 ?c?
olasank [31]
When 0.514 g of biphenyl (C12H10) undergoes combustion in a bomb calorimeter, the temperature rises from 25.8 C to 29.4 C. Find ⌂E rxn for the combustion of biphenyl in kJ/mol biphenyl. The heat capacity of the bomb calorimeter, determined in a separate experiment, is 5.86 kJ/ C. 



<span>The answer is - 6.30 * 10^3 kJ/mol 

</span>
3 0
3 years ago
How many atoms are found in the products of the following chemical equation?
coldgirl [10]

There are 13 atoms in the product

<h3>Further explanation</h3>

Given

Reaction

H2SO4 + 2KOH --> K2SO4 + 2H2O

Required

The number of atoms

Solution

In a chemical equation, there are reactants on the left and products on the right

Reactants : H2SO4 + 2KOH

Products : K2SO4 + 2H2O

The number of atoms is determined by their reaction coefficient and the subscript of the atoms in the compound

K2SO4 (coefficient = 1) :

K = 2 atoms

S = 1 atom

O = 4 atoms

Total atoms = 7 atoms

2H2O(coefficient = 2) :

H = 2 x 2 = 4 atoms

O = 2 x 1 = 2 atoms

Total atoms = 6 atoms

Total = 13 atoms

5 0
2 years ago
How to calculate IMA
Cloud [144]
Using IMA is used in Engineering, but there is a simple rhyme I use called IMA Deer. IMA=De/Dr

7 0
3 years ago
A 0.0884 M solution of a weak base has a pH of 11.79. What is the identity of the weak base?Weak Base KbEthylamine (CH3CH2NH2) 4
iVinArrow [24]

Answer:

The base must be ethylamine.

Explanation:

The pH of solution of a weak base gives us an idea about the Kb of the base.

pOH=14-pH

pOH=14-11.79=2.21

pOH=-log[OH^{-}]

[OH^{-}]=0.0062M

The relation between Kb and hydroxide ion concentration is:

Kb=\frac{[OH^{-}]^{2}}{[base]}

Kb=\frac{0.0062X0.0062}{0.0884}=4.34X10^{-4}

Thus the weak base must be ethylamine.

7 0
2 years ago
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