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choli [55]
3 years ago
15

Some common substances used in the laboratory are listed in the table. the chemical formulas of the substances are also listed b

eside their names. q:
a.how many of the listed items are elements?
a.3
b.4
c.5
d.6
Chemistry
1 answer:
Helga [31]3 years ago
7 0
Its 5 i think

but dont take my word on it

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slamgirl [31]
The answer to this question should be alpha decay
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Some students measure the acceleration of a wheeled cart being acted on by varying forces. The students record their data in the
valina [46]

F = 13 N

<h3>Further explanation</h3>

Given

Acceleration= a = 2.6 m/s²

Required

Force

Solution

Newton's second law :

ΣF = m x a

The wheeled cart used in the experiment is the same, so the mass used is the same

We use one of the data for example data 1 to find mass :

F = 1 N, a = 0.2 m/s²

m = F/a

m = 1/0.2

m = 5 kg

so for acceleration= a = 2.6 m/s² :

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3 years ago
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Maurinko [17]
Is not adequate to prevent dehydration effects in the cell
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4 years ago
Identify the quantum numbers for the electron gained when an F2 ion becomes an F3 ion
zhuklara [117]

Answer: n= 3, l= 0 , m= 0 and s=[/tex]\frac{-1}{2}[/tex]

Explanation:

Principle Quantum Numbers : It describes the size of the orbital and the energy level. It is represented by n. Where, n = 1,2,3,4....

Azimuthal Quantum Number : It describes the shape of the orbital. It is represented as 'l'. The value of l ranges from 0 to (n-1). For l = 0,1,2,3... the orbitals are s, p, d, f...

Magnetic quantum number :  It describes the orientation of the orbital. It is represented as 'm'. The value of m ranges from -l to +l.

Spin quantum number:  It describes the spin of the electron. It is represented as 's'. The value of s can be +1/2 or -1/2

F^{2-}:11: 1s^22s^22p^63s^1

F^{3-}:12:1s^22s^22p^63s^2

Thus electron enters 3s orbital , thus n= 3, l= 0 , m= 0 and s=[/tex]\frac{-1}{2}[/tex]

4 0
3 years ago
Aspirin is the common name for acetyl salicylic acid, C9H8O4. One tablet contains 0. 325 g of aspirin. How many moles of aspirin
marin [14]

Answer:

.0017952905 mol

Explanation:

I hope this helps, I can't promise I got it right, please let me know haha!

5 0
2 years ago
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