A sound's _______ tells how high or low it is. (1 point)

When taking ph measurements of solutions, why is it important to stir thoroughly after adding each reagent?.

Anon25 [30]

Mixing helps ensure that the measured pH is reflective of the entire solution

6 0

2 years ago

A student states that this structural formula represents a hydrocarbon.

DedPeter [7]

Answer: Yes, a hydrocarbon is any compound that contains hydrogen and oxygen.

Justification:

First, I will try to rewrite the given structural formula since it is misrepresented.

This should be the right structural formula:

 H H
 | |
H - C - C - OH
 | |
 H H

And, yes the definition of hydrocarbon is that it is most simple organic compound constitured only by atoms of carbon (C) and hydrogen (H).

By the way, that hydrocarbon is also represented as CH3 - CH2 OH, it is an alcohol (since it has the functional group OH) and its name is ethanol.

4 0

3 years ago

Read 2 more answers

Scientists publish a revised list of dangerous greenhouse gases. Which statements describe the importance of this information? C

Pie

Answer:

It leads to new jobs that search for innovative ways to control emissions.

Explanation:

Publishing a report that is a revised list of green house gases by scientists underscores the importance of new new jobs that seek ways of controlling emissions. The publication will inspire scientific research into control of emission of greenhouse gases. This will create new jobs for scientists who will be charged with the responsibility of ensuring that emission of Tue newly discovered greenhouse gasses is greatly reduced.

Several scientists earn a living by actively carrying out research on control of the emission of greenhouse gasses.

8 0

4 years ago

Write down as many correct, distinct, and relevant facts you can about the following prompt: 100 mL of 1.0 M solution H2SO4 is a

galben [10]

Answer:

Explanation:

From the equation:

H2SO4(aq) + 2NaOH(aq) --> Na2SO4(aq) + 2H2O (l)

1 mole of the acid (H2SO4) and 2 moles of the base (NaOH) are required for complete neutralization.

mole of acid (H2SO4) present = molarity x volume

= 1 x 0.1 = 0.1 mole

Mole of base (NaOH) present = mass/molar mass

= 7/40 = 0.175 mole

The ratio of acid and base should be 1:2, hence the acid is slightly excessive in this case and the base is the limiting reagent that will determine the extent of the reaction.

Amount of excess acid = 0.1 - 0.175/2

= 0.0125 mole

volume of excess acid = mole/molarity

= 0.0125 x 1 = 0.0125 L

= 12.5 mL

Hence, the acid (H2SO4) was in excess by 12.5 mL.

8 0

3 years ago

Iodine pentafluoride gas reacts with iodine fluoride gas producing iodine heptafluoride gas and iodine gas. What is the maximum

dybincka [34]

Answer:

63.45g of I₂ can be produced

Explanation:

IF₅ reacts with IF to produce IF₇ and I₂. The reaction is:

IF₅ + 2 IF → IF₇ + I₂

Moles of 10.0g of IF₅ (221.89g/mol):

10.0g IF₅ × (1mol / 221.89g) = 0.0451 moles of IF₅

Using PV / RT = n, it is possible to find moles of 11.20L of IF, thus:

1atm×11.20L / 0.082atmL/molK × 273K = 0.500 moles of IF.

At STP, pressure is 1atm, temperature is 273K and gas constant R is 0.082atmL/molK

For a complete reaction of IF₅ you need:

0.0451 moles of IF₅ × (2 moles IF / 1 mole IF₅) = 0.902 moles of IF. As you have just 0.500 moles of IF, the IF is the limiting reactant.

2 moles of IF produce 1 mole of I₂. 0.500 moles of IF produce:

0.500mol IF ₓ ( 1 mol I₂ / 2 mol IF) = 0.250 mol I₂

As molar mass of I₂ is 253.81g/mol, mass of 0.250 mol I₂ are:

0.250mol I₂ ₓ (253.81g / mol) =

<h3>63.45g of I₂ can be produced</h3>

3 0

4 years ago