CHEMISTRY COLLEGE

Which description is not a property of a base? (2 points)a
pH lower than 7

b
Turns litmus paper blue

c
Bitter taste

d
Slimy feel

Answers

Answer 1
Answer: i think it’s A
because if the pH is lower than 7 than it is acidic
Answer 2
Answer:

Answer:

the answer is a hope it helps.

Explanation:

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Which TWO properties are characteristic of iconic compounds?brittleness
ductility
high melting point
low boiling point
malleability

Answers

Answer : The correct options are, brittleness and high melting point

Explanation :

Ionic compound : Ionic compounds are the compounds which are formed when a metal cation bonded with non-metal anion. The metal cation and non-metal anion bonded with an electrostatic force of attraction.

The properties of ionic compounds are :

Ionic compounds are brittle and hard. They breaks easily into small pieces.

They have high melting point and boiling point.

They conduct electricity in liquid state not in solid state.

Hence, the brittleness and high melting point properties are the characteristic of ionic compounds.

Some characteristics of Ionic compounds by Mimiwhatsup: brittle, high melting point, conducts electricity when molten or dissolved in water.

The balanced equation below shows the products that are formed when pentane (C5H12) is combusted.C5H12 + 802 → 10CO2 + 6H20
What is the mole ratio of oxygen to pentane?

Answers

Answer:

8 : 1

Explanation:

The balanced equation for the reaction is given below:

C5H12 + 8O2 → 5CO2 + 6H2O

From the balanced equation above,

1 mole of C5H12 reacted with 8 moles of O2.

Thus the mole ratio of O2 to C5H12 is:

8 : 1

Answer:

8:1 !!!

Explanation:

I Just take the test

(b) Liquid hexane burns in oxygen gas to form carbon dioxide gas and water vapor.
True/False

Answers

Answer:

True

Explanation:

Liquid hexane burns in oxygen gas to form carbon dioxide gas and water vapor.TRUE.

This is the complete combustion reaction of hexane, which proceeds according to the following equation.

C₆H₁₄(l) + 9.5 O₂(g) → 6 CO₂(g) + 7 H₂O(g)

If the combustion were incomplete, instead of carbon dioxide, the product would be carbon monoxide or carbon.

On another planet, the isotopes of titanium have the following natural abundances. a. Isotope 46Ti Abundance 70.900% Mass(amu) 45.95263
b. Isotope 48Ti Abundance 10.000% Mass(amu) 47.94795
c. Isotope 50Ti Abundance 19.100% Mass(amu) 49.94479
d. What is the average atomic mass of titanium on that planet?
e. I got 46.9 amu but it is wrong.

Answers

Answer:

Average atomic mass = 46.91466 amu

Explanation:

Step 1: Data given

Isotopes of titanium

46Ti = 70.900% ⇒ 45.95263 amu

48Ti = 10.000 % ⇒ 47.94795 amu

50Ti = 19.100 % ⇒ 49.94479 amu

Step 2: Calculate the average atomic mass of titanium

Average atomic mass = 0.7090 * 45.95263 + 0.10 * 47.94795 + 0.1910 * 49.94479

Average atomic mass = 46.91466 amu

Determine the (H+), pH, and pOH of a solution with an [OH-] of 9.5 x 10-10 M at 25 °C. M pH =

Answers

Answer : The concentration of H^+ ion, pH and pOH of solution is, 1.05* 10^(-5)M, 4.98 and 9.02 respectively.

Explanation : Given,

Concentration of OH^- ion = 9.5* 10^(-10)M

pH : It is defined as the negative logarithm of hydrogen ion or hydronium ion concentration.

The expression used for pH is:

pH=-\log [H^+]

First we have to calculate the pH.

pOH=-\log [OH^-]

pOH=-\log (9.5* 10^(-10))

pOH=9.02

The pOH of the solution is, 9.02

Now we have to calculate the pH.

pH+pOH=14\n\npH=14-pOH\n\npH=14-9.02=4.98

The pH of the solution is, 4.98

Now we have to calculate the H^+ concentration.

pH=-\log [H^+]

4.98=-\log [H^+]

[H^+]=1.05* 10^(-5)M

The H^+ concentration is, 1.05* 10^(-5)M

Answer:

pOH = 9.022,  [H⁺] = 1.5×10⁻⁵ M, pH = 4.978

Explanation:

Given: [OH⁻] = 9.5 × 10⁻¹⁰ M,  T= 25°C

As, pOH = - log [OH⁻]

⇒ pOH = - log (9.5 x 10⁻¹⁰) = 9.022

The self-ionisation constant of water is given by

Kw = [H⁺] [OH⁻] and pKw = pH + pOH

Since, at room temperature (25°C): Kw = 1.0 × 10⁻¹⁴ and pKw = 14.

Therefore, Kw = [H⁺] [OH⁻] = 1.0 × 10⁻¹⁴

⇒ [H⁺] = (1.0 × 10⁻¹⁴) ÷ [OH⁻] = (1.0 ×10⁻¹⁴)  ÷ [9.5 × 10⁻¹⁰] = 0.105 ×10⁻⁴ = 1.5×10⁻⁵ M

also,

pH + pOH = pKw = 14

⇒ pH = 14 - pOH = 14 - 9.022 = 4.978

Please help me i don’t know the answer to this!!!!!!

Answers

Answer: Lithium and Ethanol

Explanation: As lithium and ethanol both have a density of under

1.000g/ml, they can be supported by the water. Blood and Magnesium are denser than the water and will therefore sink as the water can not support it them.
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