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algol13
3 years ago
11

Why is the atomic radius of sodium much smaller than the atomic radius of potassium

Chemistry
1 answer:
Bezzdna [24]3 years ago
8 0
As you go down a group the atomic radius increases and so does the number of electron shells added to an atom. 
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A rock has a mass of 416 grams and when placed in a beaker of water, the level rose to 523 mL. The beaker was originally filled
vagabundo [1.1K]

Answer:

The answer is

<h2>2.55 g/mL</h2>

Explanation:

The density of a substance can be found by using the formula

density =  \frac{mass}{volume} \\

From the question

mass = 416 g

volume = final volume of water - initial volume of water

volume = 523 - 360 = 163

volume = 163 mL

The density is

density =  \frac{416}{163}  \\  = 2.552147239...

We have the final answer as

<h3>2.55 g/mL</h3>

Hope this helps you

6 0
4 years ago
For a certain chemical reaction, the standard Gibbs free energy of reaction at 30.0 °C is 110. kJ. Calculate the equlilibriunm c
mestny [16]

Answer:

Explanation:

The equation that relates standard Gibbs free energy, ΔG, with equilibrium constant, K, is:

ΔG = -RT ln K

<em>Where R is gas constant, 8.314J/molK, and T is absolute temperatue (30.0°C + 273.15 = 303.15K).</em>

<em />

Replacing (110kJ = 110000J):

110000J/mol = -8.314J/molK*303.15K ln K

-43.644 = lnK

1.11x10⁻¹⁹ = K

<em />

7 0
3 years ago
The picture below shows one cell dividing into two cells.
vitfil [10]

all cells come from pre existing cells


4 0
3 years ago
Read 2 more answers
What type of attraction is the basis for hydrogen bonds (imf)?
Crazy boy [7]
Hydrogen bonds are strong intermolecular forces created when a hydrogen atom bonded to an electronegative atom approaches a nearby electronegative atom. Greater electronegativity of the hydrogen bond acceptor will lead to an increase in hydrogen-bond strength.
I hope this helps
5 0
4 years ago
What characteristics are used to clarify an area as a wetland?
Nadya [2.5K]
Soil covered, saturated, submerged, flooded w water, standing water
5 0
3 years ago
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