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2 years ago

Answer fast its time

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The only correct statement among the options as they are listed is that; A solute dissolves in a solvent to make up a solution (Option B)

<h3>What is a solution?</h3>

A solution is composed of a solute and a solvent. The solute is the solid that is dissolved in the solvent while the solvent is the medium in which the solid is dissolved.

Given that the solute can be a solid, liquid or gas, a solution could be homo--genous or het--erogenous as the case may be.

Thus, the only correct statement among the options as they are listed is that; A solute dissolves in a solvent to make up a solution (Option B)

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Helium gas collected at a pressure of 0.0045 atm is put into a flexible balloon measuring 350 mL in volume. What volume, in mL,

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Answer: 0.25 atm
Evidence: i looked it up

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3 years ago

A pool owner adds a compound containing chlorine to the pool to disinfect it. However, too much of the compound is added. As a r

MrMuchimi

Answer: He could add a base to the pool to neutralize the acid.

Explanation:

Chlorine is used to disinfect the pools as it produces hypochlorous acid in water. This hypochlorous acid is unstable and gives hydrochloric acid and nascent oxygen which is used to disinfect.

$Cl_2+H_2O\rightarrow HOCl$

$HOCl\rightarrow HCl+O$

The excess acid is neutralized by adding base which produces salt and water and thus decrease the acidity.

$Acid+Base\rightarrow Salt+water$

Adding more acid would increase the acidity further.

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3 years ago

Read 2 more answers

Consider the reaction of CaC2 and water to produce CaCO3 and NH3 according to the reaction CaCN2 + 3H2O → CaCO3 + 2 NH3 . How mu

xz_007 [3.2K]

Answer:

16.27 g of CaCO3 are produced upon reaction of 45 g CaCN2 and 45 g of H2O.

Explanation:

Ca(CN)2 + 3H2O → CaCO3 + 2 NH3

First of all, let's find out the limiting reactant.

Molar mass Ca(CN)2.

Molar mass H2O: 18 g/m

Moles of Ca(CN)2: mass / molar mass

45 g / 92.08 g/m = 0.488 moles

Moles of H2O: mass / molar mass

45g / 18g/m = 2.50 moles

This is my rule of three

1 mol of Ca(CN)2 needs 3 moles of H2O

2.5 moles of Ca(CN)2 needs (2.5 . 3) / 1 = 7.5 moles

I need 7.5 moles of water, but I only have 0.488. Obviously water is the limiting reactant; now we can work on it.

3 moles of water __ makes __ 1 mol of CaCO3

0.488 moles of water __ makes ___ (0.488 . 1) / 3 = 0.163 moles

Molar mass CaCO3 = 100.08 g/m

Molar mass . moles = mass

100.08 g/m . 0.163 moles = 16.27 g

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3 years ago

What is a number bond.

GenaCL600 [577]

Explanation:

number bonds are pairs of numbers that can be added together to make another number e.g. 4 + 6 = 10. They are some of the most basic and most importantparts ofmaths for children to learn

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3 years ago

Explain the optical activity of malic acid? <br>Draw a pair of stereoisomers of malic acid.

mr_godi [17]

Under standard temperature and pressure, the optical activity of malic acid changes in the following ways:

Wavelength of light
Magnitude
Temperature
Concentration of solvent.

<h3>What is an optical activity?</h3>

An optical activity is also referred to as optical rotation and it can be defined as the ability of a substance or chemical compound to rotate the plane of polarization of a beam of plane-polarized light that passes through it.

<h3>What is malic acid?</h3>

Malic acid refers to an organic compound (dicarboxylic acid) that is typically made by all living organisms and its molecular formula is $C_4H_6O_5$ . Malic acid is considered to be one of the most satisfactory substances to be used when studying optical activity because of its chemical properties such as having single asymmetric carbon atoms.

Under standard temperature and pressure, the optical activity of malic acid changes in the following ways:

Wavelength of light
Magnitude
Temperature
Concentration of solvent.

<h3>The stereoisomeric forms of malic acid.</h3>

In Science, there are two (2) stereoisomeric forms of malic acid and these include:

L-enantiomers

D-enantiomers

Read more on malic acid here: brainly.com/question/1538214

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2 years ago