Ask question

Ask question

All categories

2 years ago

14

Calculate the density for a rectangular block using the following measurements: Length = 10 cm, Width = 1.1 cm, Height = 15 cm,

Mass = 65.2 grams.
Question 3 options:

4.35 g/cm3

0.40 g/cm3

2.53 g/cm3

6.52 g/cm3

1 answer:

Ksivusya [100]2 years ago

3 0

Answer:

0.40 g/cm3

Explanation:

density = mass / volume.

mass = 65.2 grams

volume = 10*1.1*15=165 cm3

so density = 65.2/165=0.40 g/cm3

You might be interested in

the first three ionization energies of an element x are 590, 1145, and 4912 kj mol-1. what is the most likely formula of the com

joja [24]

<u>Answer:</u> The chemical formula is $XSO_3$

<u>Explanation:</u>

Ionization energy is defined as the amount of energy that is required to remove an electron from a chemical species.

The ionization energy equation for the given values follow:

$X(g)\rightarrow X^+(g)+e^-;E_I=590kJ/mol$

$X^+(g)\rightarrow X^{2+}(g)+e^-;E_I=1145kJ/mol$

$X^{2+}(g)\rightarrow X^{3+}(g)+e^-;E_I=4912kJ/mol$

From the values of ionization energy above, it can be seen that the ionization energy increases as every succeeding electron is removed.

Second ionization energy is a little higher than the first one but there is a huge amount of difference between the third and second ionization energy.

This implies that the ion formed during second ionization energy has a stable configuration and it requires a humongous amount of heat to release the third electron.

Hence, the ion formed will be $X^{2+}$

Sulfite ion is a polyatomic ion having a chemical formula of $SO_3^{2-}$

An ionic compound is formed between the two ions and the chemical compound formed between the two will have a formula of $XSO_3$

Hence, the chemical formula is $XSO_3$

5 0

2 years ago

if you were to compare the mass of the products and reactants in a reaction, you would find that the mass of the products is alw

Salsk061 [2.6K]

If you were to compare the mass of the products and reactants in a reaction, you would find that the mass of the products is <span>equal to the mass of the reactants.</span>

3 0

2 years ago

And with solution...

Tems11 [23]

Answer:

The answer to your question is: V = 6.93 L

Explanation:

Data

N₂ = 5.6 g

Volume of NH₃ = ?

14 g of N ---------------- 1 mol

5.6 g ----------------------- x

x = (5.6 x 1) / 14 = 0.4 mol of N

Reaction

N₂ + 3H₂ ⇒ 2NH₃

1 mol of N₂ ---------------- 2 moles of NH₃

0.4 mol of N₂ -------------- x

x = (0.4 x 2) / 1

x = 0.8 mol of NH₃

Formula

PV = nRT

P = 5200 torr = 6.84 atm

V = ?

n = 0.8

R = 0.082 atm L/ mol °K

T = 450°C = 723°K

Substitution

V = (0.8)(0.082)(723) / 6.84

V = 6.93 L

7 0

2 years ago

Which statement best describes how atoms combine to form sodium chloride (NaCl)?

Murljashka [212]

The answer is D. A positively charged sodium Ion and a negatively charged chlorine ion form an ionic bond.

5 0

2 years ago

Read 2 more answers

do you think that the continental plates continue to move across the surface of the earth? what evidence do you have to support

cestrela7 [59]

Yes I think & I Belive it moves across the surface

5 0

2 years ago