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mamaluj [8]
3 years ago
13

If the total mass of the products of a reaction is 90 gram, what was the total mass of the reactants

Chemistry
1 answer:
Marizza181 [45]3 years ago
4 0
90 grams due to laws of conservation of mass. Output mass = input mass. Mass can never be created or destroyed.

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What would be the volume of 0.500 mole of an ideal gas at a temperature of 273.15 Kelvins and 1 atm?
uysha [10]

Answer:

V = 11.21 L

Explanation:

Given data:

Volume of helium = ?

Number of moles = 0.500 mol

Temperature = 273.15 K

Pressure of gas = 1 atm

Solution:

Formula:

PV = nRT

R = general gas constant = 0.0821 atm.L/ mol.K

V = nRT/P

V = 0.500 mol ×  0.0821 atm.L/ mol.K  × 273.15 K / 1 atm

V = 11.21 L / 1

V = 11.21 L

8 0
3 years ago
What is the boiling point of a solution produced by adding 610 g of cane sugar (molar mass 342.3 g/mol) to 1.4 kg of water? For
wel

Answer:

Boiling point of solution is 100.65^{0}\textrm{C}

Explanation:

Cane sugar is a non-volatile solute.

According to Raoult's law for a non-volatile solute dissolved in a solution-

                              \Delta T_{b}=K_{b}.m

Where, \Delta T_{b} is elivation in boiling point of solution, K_{b} is ebbulioscopic constant of solvent (how much temperature is raised for dissolution of 1 mol of non-volatile solute) and m is molality of solution.

Here, K_{b}=0.51^{0}\textrm{C}.kg.mol^{-1}

610 g of cane sugar = \frac{610}{342.3} moles of cane sugar

                                  = 1.78 moles of cane sugar

So, molality of solution (m) = \frac{1.78}{1.4}mol.kg^{-1}=1.27mol.kg^{-1}

Plug in all the values in the above equation, we get-

\Delta T_{b}=0.51^{0}\textrm{C}.kg.mol^{-1}\times 1.27mol.kg^{-1}=0.65^{0}\textrm{C}

So, boiling point of solution = (100+0.65)^{0}\textrm{C}=100.65^{0}\textrm{C}              

7 0
3 years ago
Three places you could find alkaline earth compounds are
tatuchka [14]

Answer:

1. Soil

2. Fresh water

3. Bones and teeth

Explanation:

5 0
3 years ago
Why do some objects float, while others sink?
Maru [420]

density plays a part in why some things float and some things sink objects that are more dense than water sink and those Less dense floats

3 0
3 years ago
Read 2 more answers
Science question down below
kolezko [41]
There is only 1 negative choice here, so you can solve by common sense.
C. They reproduce slower than unicellular organisms.

This is true because, for example, think of humans. We take 9 months to reproduce uses multiple stages of meiosis. Unicellular organisms on the other hand, such as bacteria, are asexual and use binary fission to reproduce, which happens very quickly, but creates less diversity.
4 0
3 years ago
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