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ELEN [110]
3 years ago
11

An uncharged oxygen atom has eight protons and ____ electrons. [Hint: Protons are positively charged and electrons are negativel

y charged.]
zero
sixteen
one
eight
Mathematics
2 answers:
Mekhanik [1.2K]3 years ago
8 0
To make a neutral charge the protons and electrons need to cancel out therefore 8 electrons
svetoff [14.1K]3 years ago
8 0

Answer:

Option 4 - Eight

Step-by-step explanation:

Given : An uncharged oxygen atom has eight protons.

To find : The number of electrons?

Solution :

We know,

The number of protons and electrons in an atom are always equal.

Oxygen has atomic number eight.

We have given, An uncharged oxygen atom has eight protons.

To balance the atom we must have eight electrons as protons are positively charged and electrons are negatively charged.

Therefore, The number of electrons in oxygen is eight.

So, An uncharged oxygen atom has eight protons and eight electrons.

Hence, Option 4 is correct.

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The Gotemba walking trail up Mount Fuji is about 9km long. Walkers need to return from the 18km walk by 8pm. Toshi estimates tha
stiv31 [10]

Answer:

Toshi must begin his walk at 11:00 AM in order that he can return by 8:00 PM.

Step-by-step explanation:

Since the Gotemba walking trail up Mount Fuji is about 9km long, and walkers need to return from the 18km walk by 8pm, if Toshi estimates that he can walk up the mountain at 1.5km / h on average, and down at twice that speed , these speeds taking into account meal breaks and rest times, to determine what is the latest time he can begin his walk so that he can return by 8pm the following calculation must be performed:

Climb: 1.5 km / h

Descent: 2 x 1.5 km / h = 3 km / h

Climb: 9 km / 1.5 km / h = 6 hours

Descent: 9km / 3 km / h = 3 hours

Total: 9 hours

8 PM = 20:00

20:00 - 09:00 = 11:00

Thus, Toshi must begin his walk at 11:00 AM in order that he can return by 8:00 PM.

3 0
3 years ago
Solve and graph the absolute value inequality: |2x + 4| > 14.
katrin2010 [14]
Hi Malik.
2x+4>14 or -(2x+4)>14
solve each inequality individually
you get 
x>5 or x<-9
3 0
4 years ago
A new soft drink is being market tested. a sample of 400 individuals participated in the taste test and 80 indicated they like t
Ilya [14]

Answer:

Step-by-step explanation:

p/100* 400=80

*100               *100

400p=8000

:400     :400

p=20

With 5% significant level I think we consider that 22% likes the drink

3 0
3 years ago
I'm in algebra 1 please help i'm so lost
lesya692 [45]
Its a square, so all the sides are equal. Also, since the area of a square (rectangles) is equal to the height times the length, which are both the same, the area of the square is equal to x², where x is the length of any one side of the square, x²=256. now you square root both sides of that equation, x=√256, and the square root of 256 is 16. 

Tl;Dr: each side is 16 feet long.
3 0
3 years ago
Simplify the following expression: 5^2 - 4 (fraction bar) 5+2
Lyrx [107]

Answer:

d.) 3

Explanation:

\sf \rightarrow \dfrac{5^2-4}{5+2}

squaring 5 = 25

\sf \rightarrow \dfrac{25-4}{5+2}

add/subtract integers

\sf \rightarrow \dfrac{21}{7}

simplify following

\sf \rightarrow 3

8 0
2 years ago
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