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denis23 [38]
3 years ago
8

How many neutrons does an element have if its atomic number is 40 and its mass number is 154

Chemistry
1 answer:
kramer3 years ago
4 0
I am not sure about this answer 194
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Calculate the mass of a liquid with a density of 2.3 g/mL and a volume of 30 mL.
san4es73 [151]

Hello there!

First you had to multiply by the density by the volume since D=M/V. Please make sure when your units has the same thing and it should be cancel it out.

2.3g/mL*30 mL= 69L is the right answer.

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4 years ago
Name each of the stages in the life cycle of our sun. Describe what each stage is like, or what happens to cause it to change fr
Stolb23 [73]

Explanation:

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3 years ago
A molecule that does not have a positive end and a negative end is called a _____ molecule. polar nonpolar neutral ionized
Lilit [14]
Non polar molecule have no partial charge ....so non polar answer !!!
7 0
4 years ago
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In which situation is maximum work considered to be done by a force?
Lelu [443]

Answer:

Option E

Explanation:

As work is dot product of force and displacement

                W=FdCos0

As                Cos 0=1    so      W=F.d(1)

                                              W=F.d

as                 Cos 90=0 so no work will be done when angle between force and displacement is 90 degree. At angle between force and displacement is 180 degree then negative value com as Cos 180= -1

6 0
3 years ago
How many electrons will each ele-
Andre45 [30]

<h2>Explanation:</h2><h3 /><h3>Oxygen- gains 2 electrons to form ions</h3><h3>Fluorine- gains 1 electron to form negative ions</h3><h3>Aluminum - loses three electrons to form ions</h3><h3>Calcium- loses 2 electrons in order to form ions</h3>

<h3>*Non metals gain electrons to form ions</h3><h3>*Metals loses electrons to form ions</h3>

6 0
3 years ago
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