The AP Biology teacher is measuring out 638.0 g of dextrose (C6H12O6) for a lab. How many moles of dextrose is this equivalent to?

Answers

Answer 1

The AP Biology teacher is measuring out 638.0 g of dextrose (C6H12O6) for a lab the moles of dextrose is this equivalent to is 3.6888 moles.

What are moles?

A mole is described as 6.02214076 × 1023 of a few chemical unit, be it atoms, molecules, ions, or others. The mole is a handy unit to apply due to the tremendous variety of atoms, molecules, or others in any substance.

To calculate molar equivalents for every reagent, divide the moles of that reagent through the moles of the restricting reagent. The calculation is follows:

655/12 x 6 + 12+ 16 x 6 = 655/ 180 = 3.6888 moles.

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Related Questions

How many grams of nitrogen,
N2, would be required to react with
6.25 moles hydrogen, H2?

N₂ + 3H₂ → 2NH3

[?] g N₂

Answers

Answer: 29.2

Explanation:

From the coefficients of the equation, we know that for every 3 moles of hydrogen consumed, 1 mole of nitrogen is consumed.

This means we would need 6.25/3 = 2.0833333333333 mol of nitrogen.

Nitrogen has an atomic mass of 14.007 g/mol, so 2.0833333333333 moles of nitrogen have a mass of (14.007)(2.0833333333333) = 29.2 g (to 3 sf)

The work of which scientist was most essential to the use of radioactive isotopes in medicine

Answers

The work of John Lawrence scientist was most essential to the use of radioactive isotopes in medicine.

Which scientist use of radioactive isotopes in medicine?

John Lawrence was the first scientist that use a radioactive isotope in the treatment of a human disease. He became known as the father of nuclear medicine and his laboratory is considered the birthplace of this field.

So we can conclude that the work of John Lawrence scientist was most essential to the use of radioactive isotopes in medicine.

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What temperature is absolute zero?
OA. 0°C
OB. OK
O
C. 0°F
D. O molecules

Answers

Answer: 0 K

Explanation:

This is a fact - absolute zero is defined as 0 degrees Kelvin.

Which are correct statements about the emission spectrum of hydrogen in the visible region

Answers

The statement that is correct about the emission spectrum of hydrogen in the visible region is that the line corresponding to the greatest emission of energy is in the ultraviolet region.

What is hydrogen spectrum?

Hydrogen spectrum is defined as the dissociation of hydrogen atom upon action of electric current into spectral lines that can be seen in that visible light.

These lines falls under the electromagnetic wave of ultraviolet and infrared regions. But the lines of greatest emission is found in the ultraviolet region.

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what is carbon cycle​

Answers

The carbon cycle is the biogeochemical cycle by which carbon is exchanged among the biosphere, pedosphere, geosphere, hydrosphere, and atmosphere of the Earth. Carbon is the main component of biological compounds as well as a major component of many minerals such as limestone.

If you take a 10.0 mL portion of a 14.8 M solution of NH3 and dilute it to a total solution volume of 0.500 L, what will be the concentration of the final solution

Answers

Answer:

no idea about this question sorry

Give the formula of the compound formed from the following sets of elements,
- Calcium and Fluorine
- Hydrogen and Sulfur
- Nitrogen and Hydrogen
- Carbon and Chlorine
- Sodium and Oxygen

Answers

[tex]1) \text{ } \text{CaF}_{2}\\\\2) \text{ } \text{H}_{2}\text{S}\\\\3) \text{ } \text{NH}_{3}\\\\4) \text{ } \text{CCl}_{4}\\\\5) \text{ } \text{Na}_{2}\text{O}[/tex]

a fossil contains c14 and n14 in the ratio of 1:3 how old is the bone

Answers

Answer:

Approximately 11460 Years Old

Explanation:

i looked this up :/

way to much maths for me

The age of the bone given that it contains C-14 and N-14 in ratio of 1:3 is 11460 years

How to determine the percentage remaining

C-14 is usually used for radioactive dating (i.e to determine the aga of substance)

From the question, C-14 and N-14 exist in ratio of 1:3.

thus, the amount of C-14 remaining can be obtained as follow:

Ratio of C-14 = 1Ratio of N-14 = 3Total ratio = 1 + 3 = 4Percentage of C-14 remaining =?

Percentage of C-14 remaining = 1/4 × 100

Percentage of C-14 remaining = 25%

How to determine the number of half-lives that has elapsedOriginal amount (N₀) = 100%Amount remaining (N) = 25%Number of half-lives (n) =?

2ⁿ = N₀ / N

2ⁿ = 100 / 25

2ⁿ = 4

2ⁿ = 2²

n = 2

How to determine the ageHalf-life of C-14 (t½) = 5730 yearsNumber of half-lives (n) = 2Time (t) = ?

t = n × t½

t = 2 × 5730

t = 11460 years

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What kind of air mass will bring cold, dry weather as it moves toward an area

Answers

Answer:

i think the answer is Continental polar air masses

Explanation:

Ammonia chemically reacts with oxygen gas to produce nitric oxide and water
. What mass of oxygen gas is consumed by the reaction of 9.98 g of ammonia?
Round your answer to 3 significant digits.

Answers

9.98 g of NH₃ reacts with 23.4 g of O₂ (up to 3 significant figure).

What is Significant figures ?

The digits of a number that are used to express it to the required degree of accuracy, starting from the first non-zero digit.

The given chemical equation ;

4NH₃ + 5O₂ ---> 4NO + 6H₂O

Therefore,

4 moles of NH₃ reacts with 5 moles of O₂.

i.e,

68 g of NH₃ reacts with 160g of O₂.

Therefore,

9.98 g of NH₃ reacts with :

      = 160/68 x 9.98

      = 23.4 g of O₂ (up to 3 significant figure)

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What is the mass of 0.20 mole of glucose C6H12O6?

a. 230 g
b. 36 g
c. 23 g
d. 4.6 g

Answers

Answer:

answer will be b

Explanation:

mole is given 0.20

you have to find mass so just convert it into mass

remember if you move away from mole you multiply and if you move towards mole you divide so

just multiply mole with molar mass of glucose

so

0.20×180 = 36 grams

simple keep learning.......

54.0 g Al reacts with 64.0 g O2 to
form Al2O3 according to the equation.
4A1+30₂ → 2Al2O3
Al: 26.98 g/mol Al2O3: 101.96 g/mol
How many grams of Al2O3 form
from 54.0 g Al?
[?] g Al₂O3

Answers

Answer:

102 g Al₂O₃

Explanation:

To find the mass of Al₂O₃, you need to (1) convert grams Al to moles Al (via molar mass), then (2) convert moles Al to moles Al₂O₃ (via mole-to-mole ratio from reaction coefficients), and then (3) convert moles Al₂O₃ to grams Al₂O₃ (via molar mass). It is important to arrange the ratios in a way that allows for the cancellation of units. The final answer should have 3 sig figs to reflect the given values.

Molar Mass (Al): 26.98 g/mol

Molar Mass (Al₂O₃): 101.96 g/mol

4 Al + 3 O₂ ---> 2 Al₂O₃

54.0 g Al          1 mole             2 moles Al₂O₃         101.96 g
--------------  x  -----------------  x  -----------------------  x  ----------------  =  102 g Al₂O
                        26.98 g               4 moles Al            1 mole

Answer: 102 for 54.0 and 136 for 64.0

Explanation:

Hich statement about scientific consensus is true? a. it represents the beliefs of most scientists. b. it is the only way to prove a theory true. c. it is necessary to form a hypothesis. d. it is an assurance that the interpretations of a study are correct. e. it is necessary before research can be published in a science journal.

Answers

The Answer should be A. A consensus is defined as a general agreement so it is something most scientists would believe.

the mr-vp tests are part of a battery of tests called imvic tests. these tests are useful in identifying and differentiating:

Answers

the mr-vp tests are part of a battery of tests called imvic tests. these tests are useful in identifying and differentiating  Gram-positive cocci.

What is mr-vp tests?

mr-vp tests can be regarded as a test that is used in the determination of fermentation pathway that is required in glucose.

It is used in mixed acid fermentation pathway and can be used in  identifying and differentiating  Gram-positive cocci.

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4. How many moles of atoms are present in 7 moles of sulfuric acid, H₂SO4?
Avogadro's Number: 6.022 X 1023
a) 7 x 6 x 1023
b) 49
c) 21
d) 7

Answers

Answer:

49 moles of atoms

Explanation:

There are 7 individual atoms in each molecule of H2SO4:  (2 hydrogens + 1 sulfur + 4 oxygens).

Therefore, if 7 moles are decomposed, there would be 7 times that amount of individual atoms:

7 x 7 = 49 moles of atoms

how power station that produce electricity affect our environment what can we do to minimize these harmful effects?​

Answers

Answer:

they help becuz they dont use any extra power and the are reneable

When you have added as much solute as can dissolve in solvent the solution is called

Answers

Solubility limit. that's the answer

What is the color of bromcresol green indicator in a solution with a ph value of 2. 0?.

Answers

Answer:

yellow

Explanation:

Given that 0.40 mols of NaCl was dissolved in water to create a
0.250 m solution, what is the mass of water in grams?. g

Answers

2.86 is the rong answer

The 225 g FeCl2 is about 1.8 moles.
What is the molar concentration of
the solution if the total volume is
450 mL?

Answers

Answer:

[tex]4 \frac{mol}{l} [/tex]

Explanation:

From the question, we have been asked to find the molarity of FeCl2 having a volume of 450 mL,

We have been provided with 225 g which is proportional to 1.8 moles.

We know that molarity of any solution should be in mol/L.

1 mole contained in 1 L means it has a molarity of 1 mol/L

Let's convert 450 mL to Litres which is,

[tex] \frac{450}{1000} litres[/tex]

= 0.450 L

Thus,

1 mole is contained in 1L

x moles are contained in 0.450 L

Hence,

x mole/molarity = {1 mole x 1 L}/{0.450 L}

= 4 mol/L

Therefore 4 mol/L is the molar concentration.

What functional group is found in a carboxylic acid?
OA. Ester
B. Amino
C. Carbonyl
D. Hydroxyl

Answers

Answer:

the answer is c

Explanation:

A carboxylic acid is an organic compound that contains the carboxyl functional group.

What are distilled chemicals used for and what are the environmental impacts?

Answers

Answer:

Cryogenic distillation is the commercially viable separation; however, it consumes over 20 Gigajoules of energy for every ton of ethylene produced. This energy consumption is associated with significant greenhouse gas emission and depletion of non-renewable energy resources

Explanation:

hope it's helpful to you

Which of the following is an example of a testable scientific hypothesis?
A.
Why do plants grow better in the Sun than in the shade?
B.
Gorillas are happier in the wild than they are in the zoo.
C.
Roses grow faster in the Sun than in the shade.

Answers

C is the correct answer

Convert 951.9 to scientific notation. for this question, a superscript is displayed using ^ (ex.
108 would be e^8).

Answers

Answer:

9.519e^-2

Explanation:

To accurately show the number in scientific notation, you need to move the decimal place to the left 2 spaces. Because you are moving the decimal place to the left, the exponent will be a negative number. Because the decimal place moves 2 units to the left, the exponent will be a -2.

Therefore, the answer in correct scientific notation is:

951.9 ----------> 9.519e^-2

Which two protests evolved from symbolic relationships of organism which resulted in eukaryotic organisms chloroplast

Answers

Red algae and euglena evolved from a symbiotic relationship of organisms, which resulted in eukaryotic organisms containing chloroplasts

Theory of endosymbiosis:


Early eukaryotes developed by the symbiotic connection of prokaryotes, in accordance with the endosymbiosis idea. Which two protists underwent symbiotic evolution, leading to the development of eukaryotic creatures with chloroplasts.

-Symbiotic relationships between two or more prokaryotic cells led to the evolution of the first eukaryotic cells. Greater prokaryotic cells invaded or devoured smaller prokaryotic cells. The connection provided a secure home and nourishment for the tiny cells. By absorbing part of the organic molecules or energy generated by the endosymbionts, the bigger cells (now referred to as hosts) profited.

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Which of the following is used as a thermal insulator?
A. A hot plate to keep the mug warm

B. A ceramic mug filled with coffee

C.a lid to cover the coffee mug

D. A metal spoon to stir the coffee

Answers

B !! Reasoning on why: a thermal insulator is basically somthing helping to keep heat in.

There are 4.78 g of dry LICIO4 and
2.43 g H₂O in the sample.

Step 2: Determine the moles of water and anhydrous compound.

Li = 6.94 g/mol, Cl = 35.45 g/mol,
H = 1.01 g/mol, O = 16.00 g/mol
How many moles of LICIO4 are present?

[?] mol LICIO4

Answers

Answer:

The number of moles of H₂O is 0.135 mol.

The number of moles of LiClO₄ is 0.0449 mol.

Explanation:

Mole is an important standard unit used for the measurement of large quantities of atoms, molecules, or other particles. One mole is equal to 6.022×10²³ units.

The number of moles of a substance is calculated by:

[tex]\frac{mass of substance}{molecular weight of substance}[/tex]

To find the number of moles of H₂O:

Mass of H₂O in the sample = 2.43g

The molecular weight of H₂O = 18.02g

Number of moles = [tex]\frac{2.43}{18.02}[/tex] = 0.135 mol.

To find the number of moles of LiClO₄:

Mass of LiClO₄ given = 4.78g

The molecular weight of LiClO₄ = 106.39g

Number of moles = [tex]\frac{4.78}{106.39}[/tex] = 0.0449 mol.

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Answer:

0.0449

Explanation:

No probelm

Which group of the periodic table consists of elements that share similar
properties and have 2 electrons in their outer shells?
A. 1
B. 14
C. 13
D. 2

Answers

The alkaline earth metals are also referred to as Group 2A. elements are comparable to one another in terms of their electron configurations and thus, their properties.

Alkaline-earth metals:

From beryllium (Be) through radium, the alkaline-earth metals comprise Group 2 of the periodic table (Ra). The alkaline earth metals are so reactive because each of these elements has two electrons in its lowest energy level that they are rarely encountered alone in nature. However, they don't react as quickly as alkali metals do. Compared to the alkali metals, their chemical reactions normally proceed more slowly and generate less heat.

Elements and their electronic configuration are listed below:-

Be :- [He]2S2

Mg:-[Ne]3S2

Ca :-[Ar]4S2

Sr:-[Kr]5S2

Ba:-[Xe]6S2

Ra:-[Rn]7S2

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Group 2A is another name for the alkaline earth metals, which are similar to one another in terms of their electron configurations and thus, their properties.

Alkaline Earth Metals

Group 2 of the periodic table is made up of alkaline-earth metals, starting with beryllium (Be) and ending with radium (Ra). The fact that each of these elements possesses two electrons at its lowest energy level makes the alkaline earth metals extremely reactive, which is why they are rarely found by themselves in nature. They don't respond as quickly, though, as alkali metals do. Their chemical reactions often take longer and produce less heat than those of the alkali metals.

Following is a list of elements along with their electronic configuration:-

Be:- [He]2S2

Mg:-[Ne]3S2

Ca:-[Ar]4S2

Sr:-[Kr]5S2

Ba:-[Xe]6S2

Ra:-[Rn]7S2

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Given the balanced equation representing a
reaction:
2NO+ O₂ → 2NO₂ + energy
1. The mole ratio of NO to NO₂ is
(1) 1 to 1
(2) 2 to 1
(3) 3 to 2
(4) 5 to 2

Answers

Answer: it would be a 1 to 1 ratio

Explanation: originally it would be 2 to 2 but you have to reduce

A reduction reaction involves either the addition of hydrogen or removal of:

Answers

Reduction involves the either the addition of hydrogen and removal of oxygen.

What is reduction?

Reduction involves the removal of oxygen.

This implies there is a loss of oxygen in reduction.

This can be represented in the extraction of iron from it ores.

Fe₂O₃ + 3CO →  2Fe + 3CO₂

Reduction is also the addition of hydrogen. This implies it is the gain of hydrogen.

For example

CH₃CHO → CH₃CH₂OH

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