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3 years ago

What is carbon fixation?

Chemistry

1 answer:

Crazy boy [7]3 years ago

7 0

Conversion process of non-organic carbon dioxide into organic compounds by living organisms.

Example: Photosynthesis

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A solution is made by dissolving 4.87 g of potassium nitrate in water to a final volume of 86.4 mL solution. What is the weight/

lara31 [8.8K]

Answer:

A solution is made by dissolving 4.87 g of potassium nitrate in water to a final volume of 86.4 mL solution. The weight/weight % or percent by mass of the solute is :

2.67%

Explanation:

Note : Look at the density of potassium nitrate in water if given in the question.

You are calculating weight /Volume not weight/weight % or percent by mass of the solute

Here the weight/weight % or percent by mass of the solute is asked : So first convert the VOLUME OF SOLUTION into MASS

Density of potassium nitrate in water KNO3 = 2.11 g/mL

$density=\frac{mass}{volume}$

Density = 2.11 g/mL

Volume of solution = 86.4 mL

$2.11=\frac{mass}{86.4}$

$mass = 2.11\times 86.4$

$mass=182.3grams$

Mass of Solute = 4.87 g

Mass of Solution = 183.2 g

w/w% of the solute =

$= \frac{mass\ of\ solute}{mass\ of\ solution}\times 100$

$=\frac{4.87}{183.2}\times 100$

w/w%=2.67%

8 0

3 years ago

An atom containing 25 protons, 30 neutrons and 25 electrons will have an atomic mass of:

aliya0001 [1]

Atomic mass=no of neutron+no of electron
Atomic mass=25+30
Atomic mass=55

8 0

3 years ago

What does it mean if something is insoluble

TiliK225 [7]

Answer:

insoluble simply means something that cannot be dissolved in water (:

7 0

3 years ago

Which is the most explosive element?

UkoKoshka [18]

Answer:

Hydrogen is the most explosive element

6 0

2 years ago

Read 2 more answers

How does a chemist count the number of particles in a given number of moles of a substance?

jolli1 [7]

The chemist the count the number of particles (Atoms, Molecules or Formula Unit) in a given number of moles of a substance by using following relationship.

Moles = # of Particles / 6.022 × 10²³

Or,

# of Particles = Moles × 6.022 × 10²³

So, from above relation it is found that 1 mole of any substance contains exactly 6.022 × 10²³ particles. Greater the number of moles greater will be the number of particles.

8 0

3 years ago