Give two examples of an ionic compound. Chemical name and chemical structure.

A 250. ML sample of 0.3M HCl is partially neutralized by the addition of 100. ML of 0.25M NaOH.Find the concentration of hydroch

Dahasolnce [82]

Answer:- 0.143 M

Solution:- HCl and NaOH reacts in 1:1 mol ratio as shown in the below reaction:

$HCl(aq)+NaOH(aq)\rightleftharpoons NaCl(aq)+H_2O(l)$

Let's calculate the initial moles of HCl and the moles of NaOH added to it:

$250.mL(\frac{1L}{1000mL})(\frac{0.3molHCl}{1L})$

= 0.075 mol HCl

$100.mL(\frac{1L}{1000mL})(\frac{0.25molNaOH}{1L})$

= 0.025 mol NaOH

Since they react in 1:1 mol ratio, 0.025 mol of NaOH will react with 0.025 moles of HCl.

Remaining moles of HCl = 0.075 - 0.025 = 0.050

Total volume of the resulting solution = 0.250 L + 0.100 L = 0.350 L

So, the concentration of HCl in the resulting solution = $\frac{0.050mol}{0.350L}$

= 0.143 M

Hence, the concentration of HCl acid in the resulting solution is 0.143 M.

6 0

4 years ago

Density is defined as mass per unit volume, or D = m/v. Solve the density

fgiga [73]

Answer:

v = m/D

Explanation:

Density is defined as the mass per unit volume, or D = m/v. Solve for Density equation for the variable v:

With this we are making v Which represents volume the subject so;

$d = \frac{m}{v}$

With this you multiply both sides by ;

$v$

$v(d) = ( \frac{m}{v})v$

And then the v will multiply the d making it

“vd” and the ‘v’ will cancel the v making it;

$vd = m$

So then we divide both sides by d to make v the subject.

$\frac{vd}{d} = \frac{m}{d}$

So the d cancels the d leaving;

$v = \frac{m}{d}$

5 0

3 years ago

Which of these are vertebrate chordates? (Select all that apply.)

Hitman42 [59]

Answer:

humans

Explanation:

vertebate chordates include animals , mammals also the fish option is correct

7 0

3 years ago

Explain how burning coal to generate electricity is really just an energy conversion starting with solar energy from the Sun and

GuDViN [60]

Explanation:

Energy conversion in using coal to generate electricity:

Solar energy → Chemical energy → Heat energy → Mechanical energy → Electrical energy

Solar energy from the sun is used by plants in the process of photosynthesis to manufacture their food. This solar energy is used to produce glucose and other substances useful for the sustenance of the plant. The food and plant matter are made up of a lot carbon compounds that posses chemical energy. When plants dies, the matter is collected in an anoxic environment and shallow swamps where they are lithified to form coal.

In power plants, coal is pulverized into smaller bits and burnt to produce heat energy. The heat energy is used to heat water to produce steam. Turbines have been engineered to transform mechanical energy into electrical energy as they rotate when driven by steam from boilers.

Electrical energy is seen as light in our homes.

Learn more:

Coal brainly.com/question/10055728

#learnwithBrainly

3 0

4 years ago

Can some one pls help me

Sunny_sXe [5.5K]

The answer is B. It will grow towards the hole in the box because the plant will try and get as close to the sunlight as possible which is called phototropism.

8 0

3 years ago

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