What is the net ionic charge of an oxygen ion?

How much energy would be absorbed or released by the h2o in the process 30 grams h2o(

Nonamiya [84]

Speicific heat of water is 4.2j/gm*C 

Thus 4.2 Joules of energy is required to heat 1 gm water to 1*C. 
or 4.2 x 30 Joules enery is required to heat 1x30 gm water by 1*C 
or 4.2 x 30 x 80 Joules enery is required to heat 1 x 30 gm water by (100-20)*C( or required to be removed from water to cool it)

7 0

3 years ago

Read 2 more answers

What would be the colour of litmus in sodium carbonate? will make brainliest

gregori [183]

Answer:

the color of the litmus paper will turn into blue color because sodium carbonate is basic in nature

7 0

3 years ago

A label on an empty sample container reads 12.00 g. You add in a sample of a compound and mass the sample container obtaining 15

Maksim231197 [3]

The mass of the sample reported is 3.5465 g option e is correct.

Mass is the quantitative measure of the physical body.

The mass of the empty sample container is given as 12 g.

The mass of empty as well as sample containers is given as 15.5465 g.

Therefore, the mass of the sample will be given as :

Mass of sample = mass of a sample as well as empty containers - a mass of empty sample container

= 15.5465 - 12

= 3.5465 g

Therefore, the mass of the sample reported is 3.5465 g option e is correct.

For more information click on the link below:

brainly.com/question/26150306

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Complete question:

Your question is incomplete, but most probably your full question was, A label on an empty sample container reads 12.00 g. you add in a sample of a compound and the mass of the sample container obtaining 15.5465 g. what should the mass of the sample be reported as?

a) 3.546 g

b) 3.54 g

c) 4 g

d) 4.0 g

e) 3.5465 g

8 0

2 years ago

The ____________ is inversely proportional to the wavelength and reported in reciprocal centimeters (cm−1). A technique used for

san4es73 [151]

Answer:Please see below in the explanation column for answers

Explanation:

-The WAVENUMBER____________ is inversely proportional to the wavelength and reported in reciprocal centimeters (cm−1).

- A technique used for measuring the molecular weight and determining the molecular formula of an organic molecule is __MASS SPECTOMETRY__________ .

-A compound that contains an odd number of _____N_______ atoms gives a molecular ion an odd mass.

-When the molecular ion consists of two peaks (M and M+2) in a 1:1 ratio, a ___Br, Bromine_________ atom is present in the molecule.

-For a bond to absorb in the IR, there must be a change in the dipole moment during the __VIBRATION_______ .

-Organic chemists use ____iNFRA RED SPECTROSCOPY_______ to identify the functional groups in a compound.

-When the molecular ion consists of two peaks (M and M+2) in a 3:1 ratio, a ______Cl , chlorine______ atom is present in the molecule.

- The higher the percent s-character, the strong the bond, and the _______HIGHER_____ the wavenumber of an IR absorption.

-Hydrocarbons and compounds that only contain C, H, and O atoms always have a molecular ion with an __ EVEN__________ mass.

3 0

3 years ago

If 30.0 mL of Ca(OH)2 with an unknown concentration is neutralized by 40.0 mL of 0.175 M HCl, what is the concentration of the C

Over [174]

Answer:

Concentration of Ca(OH)₂:

0.117 M.

Explanation:

How many moles of HCl is consumed?

Note the unit of concentration: moles per liter solution.

$c(\text{HCl}) = 0.175\;\text{M} = 0.175\;\text{mol}\cdot\textbf{L}^{-1}$ .

Convert milliliters to liters.

$V(\text{HCl})=40.0\;\text{mL} = 0.0400\;\text{L}$ .

$n(\text{HCl}) = c(\text{HCl})\cdot V(\text{HCl})= 0.175\;\text{mol}\cdot\text{L}^{-1} \times 0.0400\;\text{L}= 7.00\times 10^{-3}\;\text{mol}$ .

How many moles of NaOH in the solution?

Refer to the equation. The coefficient in front of Ca(OH)₂ is 1. The coefficient in front of HCl is 2. In other words, it takes two moles of HCl to neutralize one mole of Ca(OH)₂. That $7.00\times 10^{-3}\;\text{mol}$ of HCl will neutralize only half that much Ca(OH)₂.

$\displaystyle n(\text{Ca}(\text{OH})_2)=\frac{1}{2}\;n(\text{HCl}) = 3.50\times 10^{-3}\;\text{mol}$ .

What's the concentration of the Ca(OH)₂ solution?

Concentration is the number of moles of solute per unit volume.

$\displaystyle c(\text{Ca}(\text{OH})_2) = \frac{n(\text{Ca}(\text{OH})_2)}{V(\text{Ca}(\text{OH})_2)} = \frac{3.50\times 10^{-3}\;\text{mol}}{0.0300\;\text{L}}=0.117\;\text{mol}\cdot\text{L}^{-1}$ .

3 0

3 years ago