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pickupchik [31]
4 years ago
12

In which set of elements would all members be expected to have very similar chemical properties?A) O, S, SeB) S, Se, SiC) N, O,

FD) Ne, Na, MgE) Na, Mg, K
Chemistry
1 answer:
Artist 52 [7]4 years ago
6 0

Answer:

A. O, S, Se

Explanation:

If you look up Oxygen (O), Sulfur (S) and Selenium (Se) in the periodic table, you will see that these three fall under the same column. In the periodic table, elements are arranged in rows and columns. Columns are called groups. The elements that fall under the same group share similar chemical properties.

The elements given above are all in Group VIA or group 16.

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yarga [219]

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3 0
3 years ago
For the reaction, a → b, the rate constant is 0.0208 m-1 sec-1. How long would it take for [a] to decrease from 0.100 to 0.0450
goldfiish [28.3K]

First, assume the order of the given reaction is n, then the rate of reaction i.e. \frac{dx}{dt}=k\times[A]^{n}

where, dx is change in concentration of A in small time interval dt and k is rate constant.

According to units of rate constant, the reaction is of second order.

\frac{1}{[A]_{t}}-\frac{1}{[A]_{o}} = kt   (second order formula)

Put the values,

\frac{1}{0.04590 m}-\frac{1}{0.100 m} =0.0208 m^{-1}s^{-1} \times t  

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\frac{12.23 m}{0.0208 m^{-1}s^{-1}} = t

t= 587.9 s

Hence, time taken is 587.9 s






5 0
4 years ago
How does the sharing of bonding electrons in a molecule of Cl2 compare to that in a molecule of HCI?
Ronch [10]
The chlorine atom bonds through covalent bond to obtain an octet structure so two atoms of 2,8,7 come together and HCl consists of both metal and nonmetal which is the the covalent bonding principle so H and Cl share the 8 valence electrons to obtain an octet structure.
8 0
4 years ago
How many moles of potassium chlorate are needed to produce 5.25 moles of oxygen
serg [7]
2KCIO3=2KCL+302
Hope you enjoy :)
8 0
3 years ago
True or false: The force exerted onto an object must be perpendicular to the displacement if work is to be considered done.
RUDIKE [14]

Answer:

its letter B. false

Explanation:

bjchakfbhc

4 0
3 years ago
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