What does it regulate? One sentence will help!

_C2H5OH + _O2–>_CO2 + _H2O How do u balance in the equation

Komok [63]

Answer:

C2H5OH +

3

O2 -->

2

CO2 +

3

H2O

(COMBUSTION REACTION)

Explanation:

I hope this helps :)

8 0

2 years ago

Pickles and lemons have a sour taste. what types of substances are in pickles to give them this sour taste

postnew [5]

The taste of Acid is Sour, that of Base is Bitter and salt is salty. So, Pickle and Lemons give sour taste due to presence of Acids. The sour taste of Lemon is due to presence of Citric Acid in it. While the sour taste of Pickle is due to presence of Vinegar (5% Acetic Acid Solution). Vinegar is mainly used to prevent the Pickle from Bacterial Attack.

6 0

3 years ago

A 1.0-L buffer solution is 0.10 M in HF and 0.050 M in NaF. Which action destroys the buffer? (a) adding 0.050 mol of HCl (b) ad

Volgvan

Answer:

(a) adding 0.050 mol of HCl

Explanation:

A buffer is defined as the mixture of a weak acid and its conjugate base -or vice versa-.

In the buffer:

1.0L × (0.10 mol / L) = 0.10 moles of HF -Weak acid-

1.0L × (0.050 mol / L) = 0.050 moles of NaF -Conjugate base-

-The weak acid reacts with bases as NaOH and the conjugate base reacts with acids as HCl-

Thus:

(a) adding 0.050 mol of HCl: The addition of 0.050moles of HCl produce the reaction of 0.050 moles of NaF producing HF. That means after the reaction, all NaF is consumed and you will have in solution just the weak acid destroying the buffer.

(b) adding 0.050 mol of NaOH: The NaOH reacts with HF producing more NaF. Would be consumed just 0.050 moles of HF -remaining 0.050 moles of HF-. Thus, the buffer wouldn't be destroyed.

(c) adding 0.050 mol of NaF: The addition of conjugate base doesn't destroy the buffer

3 0

3 years ago

Which of the following statements about enzymes is true?. a. Enzymes are able to heat up molecules so that they can react.. b. E

taurus [48]

The answer is C as enzymes are biological catalysts that act on a substrate such as starch if the enzyme were amylase

hope that helps

5 0

3 years ago

Read 2 more answers

You wash dishes for a chemistry laboratory to make extra money for laundry. You earn 12 dollars/hour, and each shift lasts 75 mi

nadezda [96]

Answer:

A)You must work 2 shifts to wash 10 loads of laundry

B)You can wash 15 loads pf laundry if you work for 3 shifts

C) each shift will pay for 3.75 loads of laundry if the cost per load rises to 16 quarters

Explanation:

Given:

amount earned = 12 dollars/hour

Duration for one shift = 75 minutes

Amount needed for Laundry = 12 quarters/load.

A. How many shifts must you work if you wish to wash 10 loads of laundry

To wash 10 loads, you will be requiring

=> $10 \times 12 \text{quarters}$

=> 120 quarters

1 quarter = 0.25 dollars---------------------------------(1)

120 quarters

= $120 \times 0.25 \text{ dollars}$

= 30 dollars

You need 30 dollars for washing 10 loads

In one hour i,e 60 minutes you earn= 12 dollars

In one minute the amount earned will be

$= \frac {12}{60}$

= 0.2 dollar-------------------------------------------------------(2)

Now to earn 30 dollars you have to work for

= $30 \times 0.2$ minutes

= 150 minutes

Thus the number of shifts will be

= $\frac{150}{75}$

= 2 shifts

B. How many loads of laundry can you wash if you work 3 shifts

We Know that 1 shift = 75 minutes

So 3 shifts = $75 \times 3$ = 225 minutes

From (2),

In 1 minute = 0.2 dollars is earned

So in 225 minutes = 225 \ times 0.2 = 45 dollar is earned

45 dollar = $45 \times 4$ = 180 quarters

You can wash 1 load with 12 quarters

With 180 quarters you can wash = $\frac{180}{12}$ = 15 loads

C. How many loads of laundry will each shift pay for if the cost per load rises to 16 quarters

Cost per load = 16 quarters

From (1)

16 quarters = $0.25 \times 16$ = 4 dollars per load

From (2) In 1 shift the amount earned will be

=> $75 \times 0.2$

=15 dollars

With 4 dollars you can wash 1 load

So with 15 dollars = $\frac{15}{4}$ = 3.75 loads

4 0

3 years ago