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MAXImum [283]
3 years ago
12

A student viewed the moon through binoculars one week after a new moon.Which image shows the phases of the moon that the student

s observed?

Chemistry
2 answers:
Igoryamba3 years ago
6 0

Answer:

Hi! I think it's maybe H...

Karolina [17]3 years ago
6 0

Answer:The answer is D

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Please help y’all I don’t understand
gulaghasi [49]

Answer:

6 electrons

Explanation:

7 0
3 years ago
Read 2 more answers
Chose the statements that are TRUE from the list below Group of answer choices Ions exist alone in nature We add calcium carbona
kompoz [17]

Answer:

The first option is false, since limestone has a much more acidic pH than granite. The pH of limestone is between 3.5 and 5.0, while the pH of granite is generally around 4.8 and 5.6.

The second option is false. (Traditionally, lactic acidosis has been classified into two categories: type A and type B. Type A is the result of tissue hypoxia and type B occurs with normal tissue perfusion and a adequate global tissue oxygenation)

The third option is false.

In the fourth option we consider that it is true since the hydrofluoric acid is a weak acid. Hydrogen fluoride actually does dissolve quite freely in water, but the H 3 O + and F - ions are strongly attracted to each other and form the strongly bonded pair, H 3 O + · F -

Explanation:

The third option is considered false since the salts contain an acid and a basic part, where one works as an anion and the other as a cation against dissolution, that is why they are not one or the other, but both chemical characteristics make up the Salt.

There are more or less soluble salts than others, and in turn there are binary, quaternary, tertiary or simple salts.

Y como para contribuir más a la explicación, es importante recordar el grupo de los acidos se clasifica en dons grandes familias, en acidos debiles y fuertes.

Un alcalde ph mas debiles seran, por más tiempo cercano al valor ph: 7 esten menos acidificacion tendran, y cuanto más lejos de la neutralidad este es su numero de ph mas fuertes seran.

5 0
4 years ago
The room temperature electrical conductivity of a semiconductor specimen is 2.8 x 104 (?-m)-1. The electron concentration is kno
Julli [10]

Answer:

7.43 × 10²⁴ m⁻³

Explanation:

Data provided in the question:

Conductivity of a semiconductor specimen, σ = 2.8 × 10⁴ (Ω-m)⁻¹

Electron concentration, n = 2.9 × 10²² m⁻³

Electron mobility, \mu_n = 0.14 m²/V-s

Hole mobility, \mu_p= 0.023 m²/V-s

Now,

σ = nq\mu_n+pq\mu_p

or

σ = q(n\mu_n+p\mu_p)

here,

q is the charge on electron = 1.6 × 10⁻¹⁹ C

p is the hole density

thus,

2.8 × 10⁴ = 1.6 × 10⁻¹⁹( 2.9 × 10²² × 0.14 +  p × 0.023 )

or

1.75 × 10²³ = 0.406 × 10²² + 0.023p

or

17.094 × 10²² = 0.023p

or

p = 743.217 ×  10²²

or

p = 7.43 × 10²⁴ m⁻³

5 0
4 years ago
Calcium reacts with oxygen to form calcium oxide. the chemical equation for this reaction is ca + o2 → cao. what is the product,
natka813 [3]

In any balanced chemical reaction, the elements or compounds which are located in the left hand side of the arrow is the reactants while those that are location on the right hand side are the products, therefore the product here is:

<span>CaO or Calcium Oxide</span>

3 0
4 years ago
If you add salt continuously to a glass of water, eventually some salt will remain at the bottom. why?
GREYUIT [131]
Http://www.lcmrschooldistrict.com/demers/cbphysicalscience/Chp%208-3%20Solubility%20and%20Concentrat...

This website helped me understand the concept.
3 0
3 years ago
Read 2 more answers
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