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3 years ago

Which describes a step in the process of forming an ionic bond

2 answers:

5 0

To create an ionic bond, 1 or more metal atoms lose their valence electrons to 1 or more nonmetal atoms, which accepts these electrons to complete their valence shell (the metal atoms also "complete" their valence shell by losing the outermost electron shell after they gave away the electrons, to reveal the full electron shell underneath). Therefore, the metal atoms becomes cations (positive ion) and the nonmetal atoms become anions (negative ion), and the force of attraction between opposite charges brings them together to form a ionic bond.

nasty-shy [4]3 years ago

3 0

A metal atom loses electrons and becomes a positive ion. Hope this helped! :)

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The ____ cycle is not a nutrient cycle

Lelu [443]

Answer:

Water cycle

Explanation:

The water cycle, also called as the hydrologic cycle that describes the continual flow of water i.e on over and beyond the surface of the Earth.

The nutrient cycle refers to the cycle in which there is a movement and exchange of organic and inorganic matter

Therefore the water cycle is not a nutrient cycle and hence the same is to be considered

7 0

3 years ago

An excess of sodium carbonate, Na2CO3, in solution is added to a solution containing 15.71 g CaCl2. After performing the experim

OlgaM077 [116]

Answer:

93.15 %

Explanation:

We have to start with the chemical reaction:

$CaCl_2~+~Na_2CO_3~->~CaCO_3~+~NaCl$

Now, we can balance the reaction:

$CaCl_2~+~Na_2CO_3~->~CaCO_3~+~2NaCl$

Our initial data are the 15.71 g of $CaCl_2$ , so we have to do the following steps:

1) Convert from grams to moles of $CaCl_2$ using the molar mass (110.98 g/mol).

2) Convert from moles of $CaCl_2$ to moles of $CaCO_3$ using the molar ratio. ( 1 mol $CaCl_2$ = 1 mol of $CaCO_3$ ).

3) Convert from moles of $CaCO_3$ to grams of $CaCO_3$ using the molar mass. (100 g/mol).

$15.71~g~CaCl_2\frac{1~mol~CaCl_2}{110.98~g~CaCl_2}\frac{1~mol~CaCO_3}{1~mol~CaCl_2}\frac{100~g~CaCO_3}{1~mol~CaCO_3}=14.16~g~CaCO_3$

Finally, we can calculate the yield percent:

$%~=~\frac{13.19~g~CaCO_3}{14.16~g~CaCO_3}*100=93.15~%$

I hope it helps!

5 0

4 years ago

What is the largest area of a circle that can be made from a piece of thread 25.2cm long assume no knot

Zarrin [17]

Answer:

$50.2 cm^2$

Explanation:

Here we want to find the largest area of a circle that can be made from a piece of thread 25.2 cm long, assume no knot .

This means that the circumference of the circle must equal to the length of the thread, so we can write:

L = 25.2 cm

And the circumference can be written as:

$2\pi r = L = 25.2$

where

r is the radius of the circle

Solving for r, we find the radius:

$r=\frac{L}{2\pi}=\frac{25.2}{2\pi}=4.0 cm$

The area of a circle is given by the formula

$A=\pi r^2$

So in this case, we find:

$A=\pi (4.0)^2=50.2 cm^2$

7 0

4 years ago

Who discovered electrons using Crookes tube?

andrey2020 [161]

Answer:

William Crookes????????????????

4 0

3 years ago

Read 2 more answers

Chemical change example

lord [1]

Answer: burning paper

Explanation:

The paper burns in air to form smoke and ash. which makes it a chemical change.

3 0

3 years ago