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
vlada-n [284]
3 years ago
6

james needs 4.20 moles of nabr for an experiment. how many grams of nabr must he measure out to have 4.20 moles?

Chemistry
2 answers:
Lena [83]3 years ago
8 0

<u>Ans: Mass of NaBr = 432 g</u>

<u>Given:</u>

# moles of NaBr = 4.20 moles

<u>To determine:</u>

The mass corresponding to 4.20 moles of NaBr

<u>Explanation:</u>

The # moles of a given substance is the ratio of its mass to molar mass

moles = mass (g)/molar mass (g.mol-1)------(1)

Molar mass of NaBr = 102.89 g/mol

Based on equation(1)

mass = moles * molar mass

        = 4.20 moles * 102.89 g.mol-1 = 432 g

kondor19780726 [428]3 years ago
6 0
75.7 grams.
Convert moles to grams using this:

Moles • grams/1 mole = grams

(Grams is over 1 mole)
You might be interested in
A block of metal has a volume of 14.0in3 and weighs 5.16 lb .
riadik2000 [5.3K]

The density of metal block in grams per cubic centimeter is 10.70 g/cm³.

Given,

Mass of metal block = 5.16 lb  

1 lb = 453.592 g

5.26 lb = 2340.536 g

The volume of metal block = 14 in 3

1 in = 2.5 cm

1 in 3 = 15.625 cm³

14 in 3 = 218.75 cm³

Density is defined as the mass per unit volume of a substance. Or, it is the ratio of mass to the volume of the substance.

As we know,

Density = mass/volume

Or, density = 2340.536 / 218.75

Or, density = 10.70 g/cm³

Therefore, the density of the metal block is 10.70 g/cm³.

To learn more about the density, visit: brainly.com/question/15164682

#SPJ9

5 0
2 years ago
Are parts of the circulatory system<br> .The<br> , and
Sphinxa [80]

Answer:

The heart and the blood vessels are a part of the circulatory system. The blood vessels include the arteries, veins and capillaries. The lungs are considered to be the pulmonary part of the circulatory system. The heart is the cardiovascular part of the circulatory system and the vessels are the systemic part of the circulatory system. The main function of the circulatory system is to supply all parts of the body with oxygenated blood and to take away the deoxygenated blood from all parts of the body.

8 0
3 years ago
The ro– group is the nucleophile. think about which group in the alkyl halide (iodoethane) is the leaving group. keep in mind th
jonny [76]
When Nucleophile (Alkoxide) reacts with Alkyl Halide (Substrate), Ether (product) is formed with the elimination of Leaving group (Iodide in this case).

This is SN² a nucleophilic substitution reaction which takes place in primary alkyl halides. Reaction is given as, 

8 0
3 years ago
a natrual distsater caused a population of 4,695 organisms to migrate to a new habitat. a few generations after the disaster it
Scilla [17]

Answer:

49.54%

Explanation:

Given parameters:

Number of organisms in original habitat = 4695

Number of organism in new habitat = 2326

Solution:

To find the percentage of the organisms in the new habitat that has migrated to the new habitat, we use the expression below:

% of the population in the new habitat =  x 100

% of the population in the new habitat =  x 100 = 49.54%

7 0
2 years ago
What causes red blood cells to become sickle-shaped in a person with sickle
White raven [17]

Answer:

A. Inheriting a specific gene

Explanation:

I hope this helps! ^^

☁️☁️☁️☁️☁️☁️☁️

6 0
2 years ago
Read 2 more answers
Other questions:
  • Calculate the molality of a 27.0% (by mass) aqueous solution of nitric acid.
    6·1 answer
  • What is the name of the compound whose formula is cl20?
    13·2 answers
  • How many grams of magnesium metal will react completely with 6.3 liters of 4.5 M HCl? Show all of the work needed to solve this
    15·1 answer
  • 8. What is the molarity of a CsOH solution if 30.0 mL of the solution is neutralized by 26.4 mL 0.25 M HBr solution (Hint: Ma x
    8·2 answers
  • Members of which group easily lose an electron to form a +1 cation?
    15·1 answer
  • Which of these is a characteristic of science?
    9·1 answer
  • 3. A scientific investigation typically begins when a scientist makes observations that lead to the formation of a (n) _________
    10·1 answer
  • The ion formed by an atom of tin when it loses four electrons is called what?
    13·1 answer
  • SOMEONE HELP PLS! I missed a day and I need help rn
    10·1 answer
  • Can someone please help me how to write down the equation and get the answer?
    10·2 answers
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!