All categories

3 years ago

Which description below correctly describes the hydrogen bonding between water molecules?

Chemistry

1 answer:

MariettaO [177]3 years ago

5 0

Answer:

c.the slightly positive oxygen on one water molecules is attracted to a slightly negative hydrogen on another molecule of water

You might be interested in

A cubic box with sides of 20.0 cm contains 2.00 × 1023 molecules of helium with a root-mean-square speed (thermal speed) of 200

Anarel [89]

Answer:

1.133 kPa is the average pressure exerted by the molecules on the walls of the container.

Explanation:

Side of the cubic box = s = 20.0 cm

Volume of the box ,V= $s^3$

$V=(20.0 cm)^3=8000 cm^3=8\times 10^{-3} m^3$

Root mean square speed of the of helium molecule : 200m/s

The formula used for root mean square speed is:

$\mu=\sqrt{\frac{3kN_AT}{M}}$

where,

= root mean square speed

k = Boltzmann’s constant = $1.38\times 10^{-23}J/K$

T = temperature = 370 K

M = mass helium = $3.40\times 10^{-27}kg/mole$

$N_A$ = Avogadro’s number = $6.022\times 10^{23}mol^{-1}$

$T=\frac{\mu _{rms}^2\times M}{3kN_A}$

Moles of helium gas = n

Number of helium molecules = N = $2.00\times 10^{23}$

N = $N_A\times n$

Ideal gas equation:

PV = nRT

Substitution of values of T and n from above :

$PV=\frac{N}{N_A}\times R\times \frac{\mu _{rms}^2\times M}{3kN_A}$

$PV=\frac{N\times R\times \mu ^2\times M}{3k\times (N_A)^2}$

$R=k\times N_A$

$PV=\frac{N\times \mu ^2\times M}{3}$

$P=\frac{2.00\times 10^{23}\times (200 m/s)^2\times 3.40\times 10^{-27} kg/mol}{3\times 8\times 10^{-3} m^3}$

$P=1133.33 Pa =1.133 kPa$

(1 Pa = 0.001 kPa)

1.133 kPa is the average pressure exerted by the molecules on the walls of the container.

3 0

3 years ago

What is the relationship between atoms, elements and compounds?

KatRina [158]

Compound is formed when two or more chemical elements are chemically bonded together. elements are made of atoms

4 0

3 years ago

A 63 gram piece of magnesium absorbs 6689 joules of heat. The final temperature is 663 degrees Celsius. What was the initial tem

Gemiola [76]

Answer:

$559^{\circ}C$

Explanation:

When heat is supplied to a substance, the temperature of the substance increases according to:

$Q=m C (T_f-T_i)$

where

Q is the amount of heat supplied

m is the mass of the substance

C is the specific heat capacity of the substance

$T_i$ is the initial temperature

$T_f$ is the final temperature

For the sample of magnesium in this problem, we have:

m = 63 g is the mass

Q = 6689 J is the hear supplied

C = 1.023 J/gC is the specific heat capacity

$T_f=663^{\circ}C$ is the final temperature

Solving the formula for $T_i$ , we find the final temperature:

$T_i = T_f-\frac{Q}{mC}=663-\frac{6689}{(63)(1.023)}=559^{\circ}C$

6 0

3 years ago

2. The hydrogen and oxygen atoms chemically bond to form the

olasank [31]

Answer:

True.

Explanation:

hydrogen and oxygen=water or hydrogen oxide

H+O2=H2O.

5 0

3 years ago

What is the representative particle for boron?

Alenkinab [10]

The molecule is the representative particle of molecular compounds. It is also the representative particle of diatomic elements.

<h2>I hope this helps you, have a beautiful day ✨</h2>

4 0

3 years ago