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4 years ago

The SI unit of measure for length - the meter -would be most appropriate when

Chemistry

1 answer:

erastovalidia [21]4 years ago

7 0

Answer:- The correct answer is B. measuring the height of a building.

Explanations:- Insects and ants are very small. So, meter is not the right unit of measure their length. Their lengths would be measure in mm that is millimeters. So, options A and C are not good.

The distance between two cities is mostly too much so it's measured in kilometers or miles. So, D is also not good.

Height of buildings is measured in meters and so the correct option is B.

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3. Rank each of the following in order of DECREASING atomic radius<br> a. Cl, Br, Ga

netineya [11]

Answer:

Br,Ga,Cl?

Explanation:

7 0

3 years ago

Calculate the partial pressure of the CO2 in the expired air at its peak, assuming 1 atm pressure and a body temperature of 37∘C

kvasek [131]

Answer:

P2= 45.50 atm

Explanation:

If the amount of gas in the tanks remains same we use the equation P1T1=P2T2

40 x 281.15 = P2 x 247.15

P2= 45.50 atm

4 0

3 years ago

Titanium has an HCP unit cell for which the ratio of the lattice parameters c/a is 1.58. If the radius of the Ti atom is 0.1445

Karolina [17]

The unit cell volume of the crystal is $V_c = 9.9084*10^-^2^3 cm^3 / unit cell$ and the density of titanium is calculated as 4.71g/cm^3 while the literature value is 4.5 g/cm^3

Data;

radius = 0.1445 nm
c/a = 1.58
A = 46.88 g/mol

<h3>Unit Cell Volume</h3>

The unit cell volume can be calculated as

$V_c = 6R^2c\sqrt{3}\\$

let's substitute the values into the formula

$V_c = 6 * (1.445*10^-^8)^2 * 1.58 8 * a * \sqrt{3} \\a = 2R\\V_c = 6 * (1.445*10^-^8)^2 * 1.58* 2 * 1.445*10^-^8 * \sqrt{3}\\ V_c = 9.984*10^-^2^3 cm^3 / unit cell$

The unit cell volume of the crystal is $V_c = 9.9084*10^-^2^3 cm^3 / unit cell$

<h3>Density of Ti</h3>

The density of titanium can be calculated as

$\rho = \frac{nA}{V_c N_a}$

n = 6 for hcp
A = 46.88 g/mol
Na = Avogadro's number

let's substitute the values into the formula

$\rho = \frac{nA}{V_c Na}\\ \rho = \frac{6*46.88}{9.9084*10^-^2^3* 6.023*10^2^3} \\\rho = 4.71 g/cm^3$

The density of titanium is calculated as 4.71g/cm^3 while the literature value is 4.5 g/cm^3

Learn more on crystal lattice here;

brainly.com/question/6610542

8 0

3 years ago

3. Two or more substances that are not

mihalych1998 [28]

Answer:

Its a mixture.

3 0

4 years ago

storchak [24]

"Electric charge: the proton and electron are electrically charged, while the neutron is not. The proton and electron, however, are oppositely charged. Role in the atom: Protons and neutrons are closely bound together in the nucleus of an atom, while electrons are spread out around the nucleus."

8 0

3 years ago