All categories

3 years ago

During a scientific investigation, which step will a scientist perform first?

Chemistry

1 answer:

svlad2 [7]3 years ago

7 0

Answer:

you need to have a question or a problem first

You might be interested in

f a cup of coffee is at 90°C and a person with a body temperature of 36°C touches it, how will heat flow between them?

coldgirl [10]

The heat flows between the two by the cup. The cup gives the coffee heat to the person and vise versa.

Hope this helps!

3 0

4 years ago

The solubility of BaCO3(s) in water at a certain temperature is 4.4 10–5 mol/L. Calculate the value of Ksp for BaCO3(s) at this

azamat

Answer : The value of $K_{sp}$ for $BaCO_3$ is $19.36\times 10^{-10}mole^2/L^2$ .

Solution : Given,

Solubility of $BaCO_3$ in water = $4.4\times 10^{-5}mole/L$

The barium carbonate is insoluble in water, that means when we are adding water then the result is the formation of an equilibrium reaction between the dissolved ions and undissolved solid.

The equilibrium equation is,

$BaCO_3\rightleftharpoons Ba^{2+}+CO^{2-}_3$

Initially - 0 0

At equilibrium - s s

The Solubility product will be equal to,

$K_{sp}=[Ba^{2+}][CO^{2-}_3]$

$K_{sp}=s\times s=s^2$

$[Ba^{2+}]=[CO^{2-}_3]=s=4.4\times 10^{-5}mole/L$

Now put all the given values in this expression, we get the value of solubility constant.

$K_{sp}=(4.4\times 10^{-5}mole/L)^2=19.36\times 10^{-10}mole^2/L^2$

Therefore, the value of $K_{sp}$ for $BaCO_3$ is $19.36\times 10^{-10}mole^2/L^2$ .

3 0

3 years ago

Jon rides his bike for 10 minutes and travels 5 km. What is Jon's average speed?

Bogdan [553]

Answer:

Explanation:

It is 50 because 5×10=50

3 0

3 years ago

Read 2 more answers

Can somebody please help with this question?

Leni [432]

Most of the mass of an atom is located in the (nucleus), and most of the volume is taken up by the (electron clouds).

The ones in the parenthesis are your answers.

Hope this helps!

7 0

3 years ago

PLEASe help. How many ions? With picture.

Likurg_2 [28]

Since this equation is balanced, we know that the law of conversation of mass id applied, and we could calculate easily.

Na= 2
NO3= 2
Ca= 1
<span>Cl= 1</span>

5 0

3 years ago