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3 years ago

What is the unit of temperature on a solubility graph

Chemistry

2 answers:

Mademuasel [1]3 years ago

8 0

Answer: Celsius

Explanation:

Andrej [43]3 years ago

6 0

Answer:

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Explanation:

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A solution has a pH of 2.5. what is the H+

romanna [79]

Answer: The concentration of $H^+$ in the solution is $3.16\times 10^{-3}M$

Explanation:

pH is defined as the negative logarithm of hydrogen ion concentration present in the solution.

$pH=-\log [H^+]$ .....(1)

We are given:

pH of solution = 2.5

Putting values in equation 1, we get:

$2.5=-\log [H^+]$

$[H^+]=10^{-2.5}$

$[H^+]=3.16\times 10^{-3}M$

Hence, the concentration of $H^+$ in the solution is $3.16\times 10^{-3}M$

4 0

3 years ago

(12) Magnesium metal burns very brightly to produce heat and a white solid.

hjlf

Answer:

exothermic

Explanation:

heat/energy is released when it burns.

5 0

3 years ago

The following Lewis diagram represents the valence electron configuration of a main-group element. This element is in group 2A A

Paraphin [41]

Answer: The symbol of the ion formed is $Ca^{2+}$

Explanation:

An ion is formed when a neutral atom looses or gains electrons.

When an atom looses electrons, it results in the formation of positive ion known as cation.
When an atom gains electrons, it results in the formation of negative ion known as anion.

Electronic configuration is defined as the representation of electrons around the nucleus of an atom.

Number of electrons in an atom is determined by the atomic number of that atom.

The element present in Group 2-A and in period 4 is Calcium (Ca)

Electronic configuration of Ca atom: $1s^22s^22p^63s^23p^64s^2$

This atom will loose 2 electrons to attain stable electronic configuration similar to Argon element (noble gas)

The electronic configration of $Ca^{2+}\text{ ion}=1s^22s^22p^63s^23p^6$

Hence, the symbol of the ion formed is $Ca^{2+}$

4 0

4 years ago

What are some of the main features found on the Sun’s surface. Describe these features in detail.

vodomira [7]

Sun spots- dark circles on the sun’s surface that I believe are areas of cooler temperatures.
Solar flares- arcs of fire that leap from the sun’s surface. Nothing special, they’re a daily roumaine for the sun

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4 years ago

What is 12500 in three sig figs

sveta [45]

12.5 x 10^3 I believe !

6 0

4 years ago