3 years ago

18. What does the sim and the atomic-scale model show that simple observations of properties cannot?

Chemistry

1 answer:

Nimfa-mama [501]3 years ago

8 0

I believe c or d? lmk what it is

You might be interested in

If measurements are made, then they are more precise on a larger scale.?

Anuta_ua [19.1K]

Answer:

No.

Explanation:

According to the formula б/X=б/√n, as more measurements are made, the uncertainty gets smaller.

7 0

3 years ago

A pharmacist measures the mass of a powdered drug. The mass is 506 mg . What is the mass in grams? Write your answer as a decima

otez555 [7]

Answer:

0.506 g

Explanation:

we know that one miligram is equal to 0.001 g or we can say that one gram contain thousand miligram. so,

if the mass of drug is 506 mg then to convert it into gram we have to divide 506 mg into 1000.

8 0

3 years ago

Examine the chemical reaction. What coefficient of O2 should be added so the number of atoms of oxygen is conserved on both side

Fed [463]

Answer:

Explanation:

3 0

3 years ago

Read 2 more answers

For the reaction below, Kp = 1.16 at 800.°C. CaCO3(s) equilibrium reaction arrow CaO(s) + CO2(g) If a 25.0-g sample of CaCO3 is

goblinko [34]

Answer:

76.0%

Explanation:

Let's consider the following reaction.

CaCO₃(s) ⇄ CaO(s) + CO₂(g)

At equilibrium, the equilibrium constant Kp is:

Kp = 1.16 = pCO₂ ⇒ pCO₂ = 1.16 atm

We can calculate the moles of CO₂ at equilibrium using the ideal gas equation.

$P.V=n.R.T\\n=\frac{P.V}{R.T} =\frac{1.16atm\times 14.4 L}{(0.08206atm.L/mol.K)\times 1073K} =0.190mol$

From the balanced equation, we know that 1 mole of CO₂ is produced by 1 mole of CaCO₃. Taking into account that the molar mass of CaCO₃ is 100.09 g/mol, the mass of CaCO₃ that reacted is:

$0.190molCO_{2}.\frac{1molCaCO_{3}}{1molCO_{2}} .\frac{100.09gCaCO_{3}}{1molCaCO_{3}} =19.0gCaCO_{3}$

The percentage by mass of the CaCO₃ that reacted to reach equilibrium is:

$\frac{19.0g}{25.0g} \times 100\%=76.0\%$

5 0

3 years ago

What is changed when matter undergoes a physical change?

Furkat [3]

I think its the mass that changes but im not sure

3 0

3 years ago