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3 years ago

Help pls 100 points and brainiest

Chemistry

2 answers:

Wittaler [7]3 years ago

7 0

The amount of salt solution is the independent variable

Fed [463]3 years ago

3 0

Answer:

The amount of salt solution.

Explanation:

so first you have to think about it as a y = mx + b function, where m and x are constants. So basically the independent variable is represented by the amount of salt solution because the health of the patient is affected by the amount of salt solution. this is how you would write it out as an equation so you can understand it better.

The Health of the patient = The amount of salt solution + b

Since y depends on the values of m, x, and b, The amount of salt solution would be the independent variable.

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Consider the structures of benzaldehyde and benzyl alcohol. Benzene ring with a CH2OH attached Benzene ring with an aldehyde gro

damaskus [11]

Answer:

no equivalent peak, upfield between 0 and 3 ppm

Explanation:

NMR stands for nuclear magnetic resonance. It is a spectroscopic technique that is used for observing the local magnetic fields around an atomic nuclei. It is used to study the chemical, physical and biological properties of the matter.

In the context, the structures of the benzaldehyde and the benzyl alcohol are distinguished by the proton NMR. The hydrogen atom of aldehyde appears downfield between 9 and 11 ppm and also there is no equivalent peak for the alcohol.

The methylene hydrogens will only be significant upfield between the 0 and 3 ppm peak between the given structures.

5 0

2 years ago

Which of the following is required for a liquid to become a solid one

tino4ka555 [31]

Answer:The process of a solid becoming a liquid is called melting

Explanation:

8 0

2 years ago

Read 2 more answers

Which aqueous solution of KI freezes at the lowest temperature?

slavikrds [6]

Answer:

b. 2 mol of KI in 500. g of water

Explanation:

We have to apply the colligative property of freezing point depression.

The formula is: ΔT = Kf . m . i

As the (Kf . m . i) is higher, then the freezing temperature will be lower.

i refers to the Van't Hoff factor (number of ions dissolved in the solution)

KI → K⁺ + I⁻ (i =2)

Kf is constant so, we have to search for the highest m (molality)

Molality means the moles of solute in 1kg of solvent.

The highest m is option b → 2 mol of KI / 0.5 kg = 4 mol/kg

a. 1 mol of KI / 0.5 kg = 2 mol/kg

c. 1 mol of KI / 1kg = 1 mol/kg

d. 2 mol of KI / 1kg = 2 mol/kg

1000 g = 1kg. In order to determine molality we need to convert the mass (g) of solvent to kg

3 0

2 years ago

How many moles are contained 80.3 gram of sm(no3)3

swat32

<h3>Answer:</h3>

0.239 mol Sm(NO₃)₃

<h3>General Formulas and Concepts:</h3>

Math

Pre-Algebra

Order of Operations: BPEMDAS

Brackets
Parenthesis
Exponents
Multiplication
Division
Addition
Subtraction

Left to Right

Chemistry

Atomic Structure

Reading a Periodic Table
Moles

Stoichiometry

Using Dimensional Analysis

<h3>Explanation:</h3>

Step 1: Define

[Given] 80.3 g Sm(NO₃)₃

[Solve] moles Sm(NO₃)₃

Step 2: Identify Conversions

[PT] Molar Mass of Sm - 150.36 g/mol

[PT] Molar Mass of N - 14.01 g/mol

[PT] Molar Mass of O - 16.00 g/mol

Molar Mass of Sm(NO₃)₃ - 150.36 + 3[14.01 + 3(16.00)] = 336.39 g/mol

Step 3: Convert

[DA] Set up: $\displaystyle 80.3 \ g \ Sm(NO_3)_3(\frac{1 \ mol \ Sm(NO_3)_3}{336.39 \ g \ Sm(NO_3)_3})$
[DA] Divide [Cancel out units]: $\displaystyle 0.238711 \ mol \ Sm(NO_3)_3$

Step 4: Check

Follow sig fig rules and round. We are given 3 sig figs.

0.238711 mol Sm(NO₃)₃ ≈ 0.239 mol Sm(NO₃)₃

3 0

2 years ago

Define cohesion. Describe how the cohesive property of water is useful for living organisms.

kolbaska11 [484]

Answer:cohesion is the action or fact of forming a united whole.

Water is very cohesive in that it "sticks" to itself. Cohesion is what allows a water droplet to form, for example. When water molecules surround one another, they settle toward a low energy state. ... Adhesion and cohesion are water properties that affect living and non-living things on earth through water molecules.

Explanation:

8 0

3 years ago

Read 2 more answers