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3 years ago

Why is water considered the universal solvent?

Chemistry

1 answer:

viva [34]3 years ago

4 0

Answer:

Explanation:

Because of waters chemical composition and physical attributes water is able to dissolve more things than any other liquid that we know of.

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Compare the seasons on Titan to the seasons on Earth.

kiruha [24]

Since Titan orbits roughly along Saturn's equatorial plane, and Titan's tilt relative to the sun is about the same as Saturn's, Titan's seasons are on the same schedule as Saturn's—seasons that last more than seven Earth years, and a year that lasts 29 Earth years.

6 0

3 years ago

If element x forms the oxides xo and x2o3 the oxidation numbers of element x are

Deffense [45]

Answer:

b) +2 and +3.

Explanation:

Hello,

In this case, given the molecular formulas:

$XO$

And:

$X_2O_3$

We can relate the subscripts with the oxidation states by knowing that they are crossed when the compound is formed, for that reason, we notice that oxygen oxidation state should be -2 for both cases and the oxidation state of X in the first formula must be +2 since both X and O has one as their subscript as they were simplified:

$X^{+2}O^{-2}$

Moreover, for the second case the oxidation state of X should be +3 in order to obtain 3 as the subscript of oxygen:

$X_2^{+3}O_3^{-2}$

Thus, answer is b)+2 and +3

Best regards.

3 0

3 years ago

You have to prepare some 2 M solutions, with 10 g of solute in each. What volume of solution will you prepare, for each solute b

alexdok [17]

Answer:

0.045 L or 45 mL

Explanation:

Moles = Mass/M.Mass

Moles = 10 g / 109.94 g/mol

Moles = 0.09 moles

Also,

Molarity = Moles / Vol in L

Or,

Vol in L = Moles / Molarity

Vol in L = 0.09 mol / 2 mol/L

Vol in L = 0.045 L

8 0

2 years ago

If 335 g water at 35.5C loses 5750 J of heat, what is the final temperature of the water?

White raven [17]

Answer:

The final temperature is 39.58 degree Celsius

Explanation:

As we know

Q = m * c * change in temperature

Specific heat of water (c) = 4.2 joules per gram per Celsius degree

Substituting the given values we get -

5750 = 335 * 4.2 * (X - 35.5)

X = 39.58 degree Celsius

3 0

3 years ago

Many hospitals, and some doctors\' offices, use radioisotopes for diagnosis and treatment, or in palliative care (relief of symp

Phantasy [73]

Answer:

a) $^{131}_{53} I$

b) $^{192}_{77} Ir$

c) $^{153}_{62} Sm$

Explanation:

The symbols of the isotopes are written like

$^{A}_{Z} X$

where,

X is the element

A is the mass number (protons + neutrons)

Z is the atomic number (protons)

a) Iodine-131

The atomic number of iodine is 53. The mass number of this isotope is 131. The symbol is $^{131}_{53} I$ .

b) Iridium-192

The atomic number of iridium is 77. The mass number of this isotope is 192. The symbol is $^{192}_{77} Ir$ .

c) Samarium-153

The atomic number of samarium is 62. The mass number of this isotope is 153. The symbol is $^{153}_{62} Sm$ .

8 0

3 years ago