1answer.
Ask question
Login Signup
Ask question
All categories
  • English
  • Mathematics
  • Social Studies
  • Business
  • History
  • Health
  • Geography
  • Biology
  • Physics
  • Chemistry
  • Computers and Technology
  • Arts
  • World Languages
  • Spanish
  • French
  • German
  • Advanced Placement (AP)
  • SAT
  • Medicine
  • Law
  • Engineering
-Dominant- [34]
3 years ago
10

How many grams of dextrose are needed to make 725 mL of a 26.0% (w/v) dextrose solution? Note that mass is not technically the s

ame thing as weight, but the abbreviation % (m/v) is often used interchangeably with % (w/v).
Chemistry
1 answer:
Diano4ka-milaya [45]3 years ago
3 0

Answer:

188.5g of dextrose are needed

Explanation:

In Weight per volume percentage - %(w/v) -, the concentration is defined as the mass of solute in grams -In this case, dextrose-, in 100mL of solution.

As you want to prepare 725mL of a 26.0% (w/v) solution. you need:

725mL * (26g / 100mL) = 188.5g of solute =

<h3>188.5g of dextrose are needed</h3>
You might be interested in
Iodine-131 has a half-life of 8.10 days. In how many days will 50 grams of Iodine-131 decay to one-eighth of its original amount
shtirl [24]
What you need to do is find 1/8 of 50
you can just divide 50 by 8 to get 6.25
so now you have to find how many days it will take till there are 6.25 grams of iodine left
every 8.1 days its mass is split in half 
so start splitting it in half and every time you do, you add 8.1 days
50/2 =25                                               8.1
25/2 =12.5                                        +  8.1
12.5/2= 6.25                                      +8.1
now you have reached 1/8 of the original amount of Iodine-131
so to find how long it took just add 8.1+8.1+8.1
(this is the same as 8.1x3)
which equals 24.3
it will take 24.3 days for Iodine 131 to decay to 1/8  of its original mass.

(good luck on the regent if thats what your studying for :)

5 0
3 years ago
Read 2 more answers
Can someone please check my answer??!!
alex41 [277]
G cancels out leaving only J.

Since there is a g in the numerator and a g in the denominator, both gs can be cancelled. This leaves the J in the numerator as the final units.
5 0
2 years ago
What happens if 2 hydrogen and 1 oxygen atoms are combined?
Wittaler [7]

Hello There!

We will have water (H2O)

So if you drink a glass of water, you drink a glass of H2O.

Hope it helps! :)

GraceRosalia here to help you :)

8 0
2 years ago
Read 2 more answers
Write Huckel's rule below and determine how many electrons are required to make an aromatic ring with n = 0, 1, and 2.
lisov135 [29]

<u>Answer:</u> The number of electrons for n = 0, 1 and 2 are 2, 6 and 10 respectively.

<u>Explanation:</u>

Huckel's rule is used to determine the aromaticity in a compound. The number of delocalized \pi- electrons are calculated by using the equation:

\text{Number of delocalized }\pi-\text{ electrons}=4n+2

where,

n = 0 or any whole number

  • Calculating the value of electrons for n = 0

Putting values in above equation, we get:

\text{Number of delocalized }\pi-\text{ electrons}=4(0)+2=2

  • Calculating the value of electrons for n = 1

Putting values in above equation, we get:

\text{Number of delocalized }\pi-\text{ electrons}=4(1)+2=6

  • Calculating the value of electrons for n = 2

Putting values in above equation, we get:

\text{Number of delocalized }\pi-\text{ electrons}=4(2)+2=10

Hence, the number of electrons for n = 0, 1 and 2 are 2, 6 and 10 respectively.

4 0
3 years ago
Please help me with chemistry
Murljashka [212]

Answer:

60.052 g/mol (molar mass of vinegar)

84.007g/mol (baking soda )

7 0
3 years ago
Other questions:
  • The dimensions of a cuboid shape cupboard are 1.31 m wide by 0.9 m long by 1.70 m tall what is the volume of the cupboard taking
    11·1 answer
  • Given the chemical formula, how is this substance MOST LIKELY classified? A) atom B) compound C) both atom and compound D) neith
    7·1 answer
  • The temperature of 950 mL of SF6 is changed from 607 K to 525 K. During this, the pressure changes from 66.95 kPa to 16.7 kPa. W
    12·2 answers
  • The language of science is _____?
    11·2 answers
  • In a convection current, what causes the molten rock to move from the bottom of the mantle to the top of the mantle?
    15·1 answer
  • When the surface of a mirror curves inward, like the inside of a bowl, it is called a ____.
    13·2 answers
  • What must be true about the matter at the start of a fire versus the end?
    9·1 answer
  • Based on the atoms which ones would be in the same period?
    10·2 answers
  • CAN SOMEONE HELP ME HERE PLEASE I ONLY NEED THESE LEFT AND IM CONFUSED-
    15·1 answer
  • 10. The hottest stars in the sky are A about 200,000°c B about 5,800°c C about 22.000.
    8·2 answers
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!