Chemistry Middle School

Acceleration involves a change in __________.

Answers

Answer 1
Acceleration involves itself in a change in “speed and direction”. Not either or.
Answer 2
Acceleration involves a change in speed and direction.

Related Questions

What is the concentration of a HF solution with a PH of 2.3

Answers

Answer:
             [H⁺]  =  5.011 × 10⁻³ mol.L⁻¹

Explanation:

The pH is converted into concentration of H⁺ as,

[H⁺]  = 10^-pH

Where 10 is antilog,

So, putting values,

[H⁺]  =  10⁻²·³

[H⁺]  =  0.00501

Or,

[H⁺]  =  5.011 × 10⁻³ mol.L⁻¹

When determining the motion of the planets in the solar system what is a good reference point to use

Answers

the sun is the answer

Calculate the answer. Express it in scientific notation and make sure it has the correct number of significant figures. (2.45 x 1013) x (4.00 x 1012) = _____

Answers

The answer is 10,046,528.8 !

(2.45 x 10^13) x (4.00 x 10^12) = 9.8 x 10^25

Hope this helps!

how many atoms of each element are needed to create an ionic compound of strontium selenide

Answers

Step 1:
           Calculate the ionic charges on both atoms:

As Strontium belongs to Group-II in periodic table so it will tend to loose two electrons and form Sr⁺² , i.e.

                                        Sr    →     Sr⁺²  +  2 e⁻

While, Se belonging to Group-VI will tend to gain two electrons and form Se⁻², i.e. 

                                       Se  +  2 e⁻    →    Se⁻²

Step 2:
           Multiply the coefficient of each element by the charge of other element.

                                    Se⁻² × 2  =  2 Se⁻²           ∴ where 2 is charge on Sr
And,
                                    Sr⁺² × 2  =  2 Sr⁺²             ∴ where 2 is charge on Se

So, the formula comes out to be,

                                                  Sr₂Se₂

Or divide both coefficients by 2 to have a simplest form. i.e...

                                                    SrSe

Result:
           One One atoms of each element are needed to create an ionic compound of Strontium Selenide.

Balance the following: ___ AlBr3+ ___ K---> ___KBr+ ___ Al

Answers

___AlBr3 + ___K -> ___KBr + ___ Al

1 AlBr3 + 3K -> 3KBr + 1 Al

hope this helps............
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