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3 years ago

WILL MARK BRAINLEST

1 answer:

5 0

To lower the amount of trash my family produces, we can use reusable bottles, cutlery, and dishes. This would be a better alternative to using both paper, and plastic items which would increase trash output. Reusable items like dishes can be used multiple times without throwing them away, instead of having to use plastic items that we’d throw away after using once.

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The edge length of the unit cell of KCl (NaCl-like structure, FCC) is 6.28 Å. Assuming anion-cation contact along the cell edge,

Mila [183]

Answer:

1.33 Å

Explanation:

Given that the edge length , a of the KCl which forms the FCC lattice = 6.28 Å

Also,

For the FCC lattice in which the anion-cation contact along the cell edge , the ratio of the radius of the cation to that of anion is 0.731.

Thus,

$\frac {r^+}{r^-}=0.731$ .................1

Also, the sum of the radius of the cation and the anion in FCC is equal to half of the edge length.

Thus,

$r^++r^-=\frac {a}{2}$ ...................2

Given that:

$Cl^-\ (r^-) = 1.82\ \dot{A}$

To find,

$K^+\ (r^+) = ? \dot{A}$

Using 1 and 2 , we get:

$1.731\ r^+=0.731\times \frac {6.28}{2}$

<u>Size of the potassium ion = 1.33 Å</u>

4 0

4 years ago

lighting a match results in light and heat since energy was not created by the match what transformation took place

Contact [7]

It is a chemical reaction

7 0

3 years ago

Read 2 more answers

A sample of calcium oxide (CaO) has a mass of 2.80 g. The molar mass of CaO is 56.08 g/mol. How many moles of CaO does this samp

Molodets [167]

Answer is "0.05 mol".

<em>Explanation;</em>

We can do calculation by using a simple formula as

n = m/M

Where, n is the number of moles of the substance (mol), m is the mass of the substance (g) and M is the molar mass of the substance (g/mol).

Here,

n = ?

m = 2.80 g

M = 56.08 g/mol

By substitution,

n = 2.80 g /56.08 g/mol

n = 0.0499 mol ≈ 0.05 mol

4 0

3 years ago

Read 2 more answers

3 The volume of a gas is 50.0 mL at 20.0 K. What will be the new

Damm [24]

Answer:

C. 4.00 K

Explanation:

We can solve this using Charles's Law of the ideal gas. The law describes that when the pressure is constant, the volume will be directly proportional to the temperature. Note that the temperature here should only use the Kelvin unit. Before compressed, the volume of the gas is 50ml(V1) and the temperature is 20K (T1). After compressed the volume becomes 10ml(V2). The calculation will be:

V1 / T1= V2 / T2

50ml / 20K = 10ml / T2

T2= 10ml/ 50ml * 20K

T2= 4K

7 0

3 years ago

el diametro de la tierra en el ecuador es de 7926381 ml. redondee este numero a tres cifras significativas y expresel en notcion

elena55 [62]

7.93 x 10⁶mi

Explanation:

Significant figures are numbers that shows how accurate and precise scientific measurements are reported.

Here are some rules to identifying them;

All non-zero digits are significant
zeros between digits are significant
leading zero before a decimal are not significant
trailing zero after a decimal are significant
trailing zero before a decimal point are significant.

The number 7926381 has 7 significant numbers.

To write in the scientific notation, we simply express as N x 10ᵃ

N is the number of significant number

a is the exponent

N here is 7.93

a here is 6

7.93 x 10⁶mi

learn more:

Significant figures brainly.com/question/2746374

#learnwithBrainly

7 0

3 years ago