3 years ago

H-C C-H name of formula

Chemistry

1 answer:

Vanyuwa [196]3 years ago

7 0

Answer:

Ethyne

Explanation:

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what is the concentration of a solution, in parts per million, if 0.02 gram of Na3PO4 is dissolved in 1000 grams of water

tiny-mole [99]

One way of expressing concentration is by expressing it by parts per million or ppm. Parts per million is equal to 1 milligram of solute per kilogram of solution. The problem is solved as follows:

<span>ppm = 0.02 g (1000mg/1g) /( 1000 g + </span>0.02 g) (1 kg / 1000g)<span> </span>= 2x10^-5 ppm

5 0

3 years ago

A substance with a define shape and volume is a blank phase of metter

aksik [14]

Definite Shape and Definite Volume is a solid.

NO Definite Shape and Definite Volume is a liquid.

NO Definite Shape and NO Definite Volume is a gas.

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3 years ago

Determine the number of water molecules in 115g of chromium(III) oxalate trihydrate.

m_a_m_a [10]

Answer:

$4.92x10^{23}molecules H_2O$

Explanation:

Hello,

In this case, since the chromium(III) oxalate trihydrate is Cr₂(C₂O₄)₃ ·3H₂O whose molar mass is 422 g/mol and one mole of chromium(III) oxalate trihydrate contains three moles of water, by also considering that one mole of substance contains the Avogadro´s number in particles, the number of water molecules turns out:

$=115gCr_2(C_2O_4)_3\ 3H_2O*\frac{1molCr_2(C_2O_4)_3\ 3H_2O}{422gCr_2(C_2O_4)_3\ 3H_2O}*\frac{3molH_2O}{1molCr_2(C_2O_4)_3\ 3H_2O} *\frac{6.022x10^{23}molecules H_2O}{1molH_2O} \\\\=4.92x10^{23}molecules H_2O$