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zavuch27 [327]
3 years ago
11

Answer 31. Please ‍♂️

Chemistry
1 answer:
satela [25.4K]3 years ago
8 0
Lol, found the answers

Hope this helped

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A chloride of silicon contains 79.1 mass % Cl. (a) What is the empirical formula of the chloride? (b) If the molar mass is 269 g
V125BC [204]

Answer:

Empirical SiCl3

Molecular Si2Cl6

Explanation:

Since it contains 79.1% chlorine, this means it contains (100 - 79.1)% silicon = 20.9% chlorine

To get the empirical formula, we firstly need to know the atomic masses of both chlorine and silicon. This is 35.5 and 28

We then divide the percentage abundances by the corresponding atomic masses.

Cl = 79.1/35.5 = 2.23

Si = 20.9/28 = 0.75

We then divide by the smallest, which is 0.75

Cl = 2.23/0.75 = 3

Si = 0.75/0.75 = 1

The empirical formula is thus SiCl3

To get the molecular formula:

(28+3(35.5))n = 269

134.5n = 269

n = 269/134.5 = 2

The molecular formula is Si2Cl6

8 0
3 years ago
How do I do this whole problem?
KatRina [158]

The solubility of a substance in water is dependent on the temperature. Thus for

1 & 2: Temperature is the independent variable (the one that changes in the first place) and Solubility is a dependent variable (a variable that changes in response to changes in the independent variable.)

The graph: by convention you shall label the horizontal axis with the independent variable and the vertical axis with the dependent variable. For clarity's sake you shall use the finest scale possible that accommodates for all data provided for both axis. Plot the data points on the graph as if they are points on a cartesian plane.

My teacher made no detailed requirements on the phrasing on titles of solubility curve plots; however, like most other graphs in chemistry, the title shall specify the name of variables presented in this visualization. For instance, "the solubility of KClO_3 under different temperatures" might do. You shall refer to your textbooks for such convention.

It is necessary to interpolate to find the solubility at a temperature not given in the table. Start by connecting all given data points with a smooth line; find the vertical line corresponding to temperature = 75 degree Celsius and determine the solubility at the intersection of the vertical line and the trend line. That point shall approximates the solubility of the salt at that temperature.

4 0
4 years ago
How many mL of water would be displaced by 408 g of lead?
Galina-37 [17]

Answer:

36 mL of water can be displace by the 408 g lead

Explanation:

Given data:

Mass of lead = 408 g

Volume of water displaced by lead = ?

Solution:

The volume of water displace by the lead would be equal to the given volume of lead.

So we will calculate the volume from given mass of lead from density formula.

Density:

Density is equal to the mass of substance divided by its volume.

Units:

SI unit of density is Kg/m3.

Other units are given below,

g/cm3, g/mL , kg/L

Formula:

D=m/v

D= density

m=mass

V=volume

Density of lead is 11.36 g/cm³.

d = m/v

11.36 g/cm³ = 408 g/ v

v = 408 g/ 11.36 g/cm³

v =36 cm³

1 cm³  = 1 mL

volume = 36 mL

36 mL of water can be displace by the 408 g lead.

4 0
3 years ago
Using the periodic table to locate each element, write the electron configuration of(c) Re.
Aleksandr [31]

Rhenium is a chemical element with the symbol Re and atomic number 75. The electron configuration of Re is [Xe] 6s^{2} 4f^{14} 5d^{5}.

<h3>How to write an electronic configuration?</h3>

1. Identify the given element and its atomic number from the periodic table.

2. Write the electron configuration by the energy level and the type of orbital first, then the number of electrons present in the orbital as superscript.

The easiest way to write the electronic configuration for any element is by   using a diagonal rule for electron filling order in the different subshells according to the Aufbau principle.

The 3 rules for writing the electron configuration in the orbital box diagram are – the Aufbau rule, the Pauli-exclusion rule, and Hund's Rule.

To learn more about electronic configuration, refer

https://brainly.ph/question/73419

#SPJ4

5 0
2 years ago
I don’t understand what its means
docker41 [41]

Answer:

me neither as well

Explanation:

I don't know sorry

6 0
3 years ago
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