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Evgen [1.6K]
3 years ago
8

A gray element that borders on the zigzag line of the periodic table, is ductile and malleable, but is not a very good conductor

of heat or electricity is known as which of the following?
A. metal
B. halogen
C. metalloid
D. nonmetal
Chemistry
1 answer:
frez [133]3 years ago
6 0
The answer is non metal D
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1. What happens when you add buttermilk (an acid) to baking soda (a base) in a mixing bowl does the pH increases or decreases or
Brums [2.3K]

Answer:

Explanation:

1)This reaction is an acid base reaction. Baking soda is made up of sodium bicarbonate has it's PH above 7,while the Buttermilk contains some fatty acids with it's PH below 7, neutralization would occur when mixed together, and the pH of the mixture must be close to 7 which is neutral pH.

2) PH of 7(Neutral PH)

3)Self-raising flour has baking powder as one of its constituents. It also cotains cream of tartar, bicarbonate soda as well as calcium aluminium phosphate, the carbon dioxide from Bicarbonate of soda is released when reaction with acid takes place, then the Cream of tartar turns to tartaric acid when it is mosturized , then the reaction between them will produce bubbles of carbon dioxide in the cake, causing the cake to rise.

4)It makes a good household cleaner because it react with organic chemicals such as oil or grease then break them down like without attacking the metals that is attached to them.Bases contain particles called hydroxide ions. The higher the amount of hydroxide ions present in a base , the stronger it is.

5) The harsh acid or bike in the stomach creates a burning sensation in the back of your throat which irritate the food pipe line. Ifthe acid reflux is severe, it's reffered to as gastroesophageal reflux

3 0
4 years ago
An atom of sodium 23 Na(23) has a net charge of plus 1 identify the number of protons, neutrons, and electrons in the atom
prohojiy [21]
Sodium 23 has 11 electrons 11 protons and 12 neutrons
7 0
3 years ago
6.) (5 points) Assume you have a system with a fixed pH of 4.0. It is well buffered and therefore the pH will not change. What i
KIM [24]

Answer:

Dissociated state is the predominant one

Explanation:

When a molecule with pKa of 4.52 is in an aqueous solution at pH = 4.0, follows the H-H equation, thus:

pH = pKa + log₁₀ [A⁻] / [HA]

<em>Where [A⁻] is the dissociated state and [HA] represents the protonated state</em>

Replacing:

4.0 = 5.2 + log₁₀ [A⁻] / [HA]

-1.2 = log₁₀ [A⁻] / [HA]

0.063 =  [A⁻] / [HA]

[HA]  = 16 [A⁻]

That means you have 16 times more [HA] than [A⁻] and the <em>dissociated state is the predominant one</em>

7 0
3 years ago
How does fermentation allow the cell to continue to make atp when oxygen is not present?
kap26 [50]

Explanation:

Usually most cells that carry anaerobic respiration utilize the Glycolysis pathway because it does not require oxygen. It is also believed it is the ancient metabolic pathway by utilized by primordial cells  when the earth's atmosphere was not mainly oxygen,  

Glycolysis consumes 2 ATPs (during the conversion of Glucose to Fructose 1,6 bisphosphate ) but produces a gross $ ATPs. It, therefore, has a net ATP of 2. This is inefficient when compared to the Krebs cycle that utilizes oxygen to produce 34 ATPs. Anaerobic respiration produces pyruvate. This pyruvate is broken down into an organic acid like lactic acid which is excreted from the cell, which is why fermented food tastes sour.

Learn More:

For more on Glycolysis metabolic pathway check out;

brainly.com/question/211200

brainly.com/question/1966268

#LearnWithBrainly

5 0
3 years ago
A helium balloon contains 0.40 g of helium. given the molecular weight of helium is 4.0 g/mol, how many moles of helium does it
Rasek [7]

Answer is 0.10 mol.


<em>Explanation;</em>


n = m/M


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


n = ?

m = 0.40 g

M = 4.0 g/mol


From substitution,

n = 0.40 g /4.0 g/mol

n = 0.10 mol


Hence, the balloon has 0.10 mol of He.

8 0
3 years ago
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