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sergey [27]
4 years ago
13

Diseases are classified into _______ and _____ based on their duration.

Chemistry
1 answer:
adelina 88 [10]4 years ago
7 0

Answer:

communicable and non-communicable?

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Why does chlorine react vigorously with hydrogen in the presence of sunlight?
AleksandrR [38]
Chlorine react vigorously with hydrogen in the present of sunlight because chlorine has a great attraction for hydrogen's electron. During the reaction, chlorine  and hydrogen will donate one electron each from their valence electrons which will be shared equally by both elements, thus forming a covalent bond.
6 0
3 years ago
Consider the elements carbon, C and silicon, Si.
Aneli [31]

Answer:

and

Explanation:

All the carbon group atoms, having four valence electrons, form covalent bonds with nonmetal atoms; carbon and silicon cannot lose or gain electrons to form free ions, whereas germanium, tin, and lead do form metallic ions but only with two positive charges

the similarities is that Both carbon and silicon commonly form compounds, easily sharing electrons with other elements. Carbon will make multiple bonds with other carbon molecules by forming single, double and triple covalent bonds. ... Carbon and silicon are often combined, with carbon serving as silicon's backbone.

3 0
3 years ago
A system is in equilibrium when the rate of the forward reaction is _____ the rate of the reverse reaction.
Fudgin [204]

Answer:

A system is in equilibrium when the rate of the forward reaction is equal to the rate of the reverse reaction.

Explanation:

In a system in equilibrium, the rupture and formation of new bonds from the formation and decomposition of substances must have the same reaction rate. Thanks to equal speeds we can say that a system in equilibrium is dynamic and in general every system tends to move spontaneously towards equilibrium. The environment never interferes.

For example.

N2 (g) + 3H2 (g) ---> 2NH3 (g) formation

2NH3 ----> N2 (g) + 3H2 (g) decomposition

N2 (g) + 3H2 (g)  <------>  2NH3 (g)     In equilibrium

8 0
3 years ago
Read 2 more answers
A balloon with a volume of 2.0 L at 25°C is placed in a hot room at 35°C. The pressure on the balloon is constant at 1.0 atm. Wh
Evgen [1.6K]

Answer:

2.1 L

Explanation:

V2=(V1T2)/T1

Change C to K

4 0
4 years ago
Read 2 more answers
Which of the following is NOT a subatomic particle contained in an atom?
Illusion [34]
A photon is not in an atom. An electron is in the orbitals, the protons and neutrons are in the nucleus, but the photon is NOT included.<span />
7 0
3 years ago
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