Which measurement of mass would have the shortest de Broglie wavelength at a given speed? A. 10 kg B. 20 kg C. 30 kg D. 40 kg

7. The movement of water molecules from an area of high concentration to an area of low concentration is

seropon [69]

The movement of water molecules from higher to lower concentration is osmosis.

6 0

3 years ago

Can someone help me

Nady [450]

The answer is D 10x21

7 0

3 years ago

When a fixed amount of ideal gas goes through thermal expansion what happens to internal energy

Keith_Richards [23]

Answer:

A) its internal (thermal) energy does not change.

Explanation:

When a fixed amount of ideal gas goes through an isothermal expansion

3 0

3 years ago

A wave has a wavelength of 6 mm and a frequency of 9 hertz. What is its speed? what is the answer and units?

Lisa [10]

Answer:The speed is 54 mm/s, the units are mm/s.

Explanation:

1) Data:

a) λ = 6mm
b) f = 9 Hz = 9 s⁻¹
c) v = ?

2) Formula:

wave equation: v = f × λ

3) Solution:

v = 9 s⁻¹ × 6mm

v = 54 mm/s

The speed is 54 mm/s, the units are mm/s.

5 0

3 years ago

Water has a mass per mole of 18.0 g/mol, and each water mo- lecule (H2O) has 10 electrons. (a) How many electrons are there in o

kap26 [50]

Answer:

Part 1) Number of electrons in 1 liter of water equals $N=3.346\times 10^{26}$

Part 2) Net charge of all the electrons equals $Charge=53.61\times 10^{6}$

Explanation:

Since we know that the density of water is 1 kilogram per liter thus we infer that mass of 1 liter of water is 1 kilogram hence we need to find electron's in 1 kg of water.

Now since it is given that molar mass of water is 18.0 grams this means that 1 mole of water contains 18 grams of water.

Hence by ratio and proportion number of moles in 1 kg water equals

$n=\frac{1000}{18}$

Now by definition of mole we know that 1 mole of any substance is Avagadro Number of particles.

Hence the no of molecules in 'n' moles of water equals

$n'=\frac{1000}{18}\cdot N_a\\\\n'=\frac{1000}{18}\cdot 6.023\times 10^{23}\\[\tex][tex]\\n'=3.346\times 10^{25}$

Now since it is given that each molecule has 10 electron's thus the total number of electrons in n' molecules equals

$N=10\times 3.346\times 10^{25}\\\\N=3.346\times 10^{26}$

Part 2)

We know that charge of 1 electron equals $1.602\times 10^{-19}C$ the the charge of electrons in 'N' quantity equals

$Charge=1.6022\times 10^{-19}\times 3.346\times 10^{26}\\\\Charge=52.61\times 10^{6}Columbs$

4 0

3 years ago