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
Natali [406]
3 years ago
14

5.40 g B determine the number of atoms

Chemistry
1 answer:
sdas [7]3 years ago
4 0
Atomic mass Boron ( B ) = 10.811 u.m.a

10.811 g -------------- 6.02x10²³ atoms
5.40 g ----------------- ?? atoms

5.40 x ( 6.02x10²³) / 10.811 =

3.0069x10²³ atoms
You might be interested in
Anyone wanna talk as as a date *^* , I'm not afraid to be out there lol, we can just talk ( girl, 14 XD, bi *^*) or just want to
Law Incorporation [45]

Answer:

what about just talk and become friends :) :) :)

6 0
3 years ago
Read 2 more answers
Benzoic acid is a weak acid that has antimicrobial properties. Its sodium salt, sodium benzoate, is a preservative found in food
Ksju [112]

Answer:

1.1 percent

Explanation:

C6H5COOH⇌C6H5COO+H

Ka = [C6H5COO-][H+]/[C6H5COOH]

From pKa of 4.2, Ka = 6.3x10^-5

6.3x10^-5 = (x)(x)/0.51-x and assuming x is small...

6.3x10^-5 = x^2/0.51

x^2 = 3.213x10^-5

x =5.67 x10^-3

(5.67x10^-3/0.51)x 100 =1.1 percent

3 0
3 years ago
PLS HELP ASAPPP!!!
inysia [295]

Voltaic cells convert chemical energy to electrical energy by means of an oxidation-reduction reaction while Electrolytic cells convert electrical energy to chemical energy, so they are the opposite of voltaic cells,in an electrolytic cell, the cathode is negatively charged and the anode is positively charged

3 0
3 years ago
What mass of NaCl can be dissolved in 100g of water at 50c?
marshall27 [118]
DONT PRESS THE LINK 12-13
6 0
3 years ago
Which of the following lends itself to the use of a descriptive method? a. Jonathan would like to develop a hypothesis regarding
Marianna [84]

Answer:

a. Jonathan would like to develop a hypothesis regarding the role of parental expression of affection in reducing toxic stress in early childhood.

Explanation:

A descriptive method is commonly known as a research method for describing the properties or features of the research area being investigated. Descriptive research is usually conducted by studying the trends of the phenomenon without changing the value of any variable in the system. Thus, the correct answer is option a.

7 0
3 years ago
Other questions:
  • What should happen when a piece of copper is placed in 1m hcl?
    7·1 answer
  • 19. When an atom of iron loses all of its 4s electrons and one of its 3d electrons, what is its charge?
    13·1 answer
  • Question 1 (True/False Worth 2 points) (04.03 LC) When Pb and AlCl3 react together, lead (Pb) can replace aluminum (Al) in the c
    7·2 answers
  • How are continental drift and plate tectonics related
    14·2 answers
  • If the [H3O+] of a solution is 1x 10-8 mol/L the [OH-] is
    13·1 answer
  • Phosphoric acid, which is a component of many soft drinks, has a molar mass of 98.00 grams per mole. A sample of phosphoric acid
    7·1 answer
  • How many grams of a 14.0% (w/w) sugar solution contain 62.5<br> of sugar?
    13·1 answer
  • How do I distinguish between Heptanol and heptanal using a chemical reagent. Give the respective observation as well.​
    11·1 answer
  • A student heated a blue copper sulfate crystal in a test tube. After a few minutes, she observed that the crystal turned white a
    12·1 answer
  • 1. How is a bicycle race like a chemical reaction? The Tour de France is one of the most famous bicycle races in the world. It i
    12·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!