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Sidana [21]
3 years ago
10

What is true about a chemical reaction

Chemistry
2 answers:
Vladimir [108]3 years ago
4 0
A chemical equation summarizes a reaction. ... All the atoms present at the start of a reaction are present at the end. true.
MatroZZZ [7]3 years ago
3 0

Answer: energy is transferred, but it can go to the products or the reactants.

Explanation: in a chemical reaction, the atoms and molecules that interact with each other are called reactants.

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Which of the following describes a community?
Ostrovityanka [42]
I would say the answer is C
7 0
3 years ago
Read 2 more answers
A sample of ascorbic acid (vitamin C) is synthesized in the laboratory. It contains 30.0 g carbon and 40.0 g oxygen. Another sam
mote1985 [20]

Answer:

16.933g approximately 17.0 grams

Explanation:

From the simple promotions and given the same compound ascorbic acid (vitamin C)

In the laboratory synthesised ascorbic acid

Mass of carbon = 30.0g

Mas of Oxygen = 40.0g

That is the mass of Oxygen per unit mass of Carbon

Per gram of Carbon we have

(30.0g Carbon)÷30 combines with (40.0g of Oxygen)÷30

That is 4/3g of Oxygen per gram of Carbon

Hence the mass of Oxygen compound that combines with 12.7g of Carbonin natural occurring ascorbic acid (vitamin C) is = 4/3×12.7 = 16.933g approximately 17.0g

8 0
3 years ago
Which of the following statements does not describe what he structure of an atom an atom has a small dense center called nucleus
nikklg [1K]

Answer:

inside the nucleus of an atom are protons and electrons.

5 0
3 years ago
What trend is seen in atom size, going down the periodic table?
m_a_m_a [10]
Answer:
It is called Ionization Energy.
7 0
3 years ago
When 1 mol of KBr(s) decomposes to its elements, 394 kJ of heat is absorbed. (a) Write a balanced thermochemical equation.
VladimirAG [237]

The balanced thermochemical equation is

KBr ------- K + 1/2 Br2

<h3>What is thermochemical equation? </h3>

A Thermochemical Equation is defined as the balanced stoichiometric chemical equation which includes the enthalpy change, ΔH.

The chemical equation for the decomposition of potassium bromide to its constituent elements bromine ans potassium :

KBr ----- K + Br2

The balanced thermochemical equation of the decomposition of potassium bromide to its constituent elements potassium and bromide as follows

KBr ------- K + 1/2 Br2

As the heat is absorbed in this reaction therefore, heat is positive.

Thus, we concluded that the balanced thermochemical equation is

KBr ------- K + 1/2 Br2

learn more about thermochemical equation:

brainly.com/question/2733624

#SPJ4

8 0
2 years ago
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