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3 years ago

In the name carbon dioxide, the prefix of the second word indicates that a molecule of carbon dioxide contains

2 answers:

8 0

the prefix of the second word indicates that a molecule of carbon dioxide indicates that the compound contains two oxygen atoms

ruslelena [56]3 years ago

6 0

Answer:

Explanation:

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Consider the reaction: 3 A + 5 B --> 4 C. The rate of the reaction is found to be .7511 M/s. What is the rate of change of B?

JulijaS [17]

Answer:

-3.7555 M/s is the rate of change of B.

Explanation:

3A + 5B → 4C

Given that rate of the reaction ,R= 0.7511 M/s

Rate of the reaction is defined as change in concentration of any one of the reactant or product with respect to time.

$R=\frac{-1}{3}\frac{dA}{dt}=\frac{-1}{5}\frac{dB}{dt}=\frac{1}{4}\frac{dC}{dt}$

$R=0.7511 M/s=\frac{-1}{5}\frac{dB}{dt}$

$\frac{dB}{dt}=5\times 0.7511 M/s=-3.7555 M/s$

The negative sign indicates the concentration of reactant B is decreasing with progress in time. This mean reactant B is disappearing.

-3.7555 M/s is the rate of change of B.

5 0

3 years ago

Calculate the molality of a solution containing 22.75 g of glycerol (C3H8O3) in 79.6 g of ethanol (C2H5OH).

3241004551 [841]

Answer:

3.11 mol/kg

Explanation:

Molality M = number of moles of solute, n/mass of solvent, m

To calculate the number of moles of glycerol (C₃H₈O₃) in 22.75 g of glycerol, we find its molar (molecular) mass, M',

So, M' = 3 × atomic mass of carbon + 8 × atomic mass hydrogen + 3 × atomic mass of oxygen

= 3 × 12 g/mol + 8 × 1 g/mol + 3 × 16 g/mol = 36 g/mol + 8 g/mol + 48 g/mol = 92 g/mol.

So, number of moles of glycerol, n = m'/M' where m' = mass of glycerol = 22.75 g and M' = molecular mass of glycerol = 92 g/mol

So, n = m'/M'

n = 22.75 g/92 g/mol

n = 0.247 mol

So, the molality of the solution M = n/m

Since m = mass of ethanol = 79.6 g = 0.0796 kg, substituting the value of n into the equation, we have

M = 0.247 mol/0.0796 kg

M = 3.11 mol/kg

So, the molality of the solution is 3.11 mol/kg.

5 0

3 years ago

Which is not a property of bases Group of answer choices react with metals to produce hydrogen gas react with acids to form a sa

Zanzabum

Answer:

react with metals to produce hydrogen gas

Explanation:

NaOH is a common base and is a strong base. Look what happens with it reacts with a metal:
OH- (aq) + Li(s) --> LiOH. It forms a salt not H2

(I removed spectator ions)

5 0

2 years ago

The concentration of calcium in a cell is 0.3%. The concentration of calcium in the surrounding fluid is 0.1%. How could the cel

iragen [17]

Answer:

Primary active transport

Explanation:

In a cell, the movement of molecules like calcium ions (Ca²⁺), to a region having high solute concentration from a region having low solute concentration, through the cell membrane requires metabolic energy and is known as Primary active transport.

It is given that the concentration of calcium in the cell (0.3%) is greater than the concentration of calcium in the fluid surrounding the cell (0.1%). So the calcium ions move into the cell and the cell obtains more calcium.

Therefore, the cell obtains more calcium by the process of Primary active transport.

4 0

4 years ago

Fill in the missing symbol and name the reaction:

damaskus [11]

Answer:

Give ur life to Jesus Christ before its to late!!!!!!!!!!

Explanation:

5 0

3 years ago