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
julsineya [31]
2 years ago
9

A sample of sodium hydroxide (NaOH) has a mass of 160.0 g. The molar mass of NaOH is 40.00 g/mol. How many moles of NaOH does th

is sample contain?
4.000
40.00
160.0
6,400
Chemistry
2 answers:
Tems11 [23]2 years ago
8 0

Answer:

4.000

Explanation:

Got it right on Edg. 2021

NARA [144]2 years ago
6 0

Answer:

400 becuase NAOH AND TJE NAOH ARE THE same

Explanation:

You might be interested in
What happens to the water molecules when water at 24°C is cooled to 0°C
Softa [21]
Well if it were to freeze , the molecules move and become a solid slowly
5 0
3 years ago
You believe you have cracked a secret code that uses elemental symbols to spell words. The code uses numbers to designate the el
Stells [14]

Explanation:

Atomic numbers for neutral atoms are the same as the number of electrons. The number of electrons are used in writing the subshell notation where we can see the highest princpal quantum number(n).

In order to solve this problem, a good knowledge of the periodic table and shell notation is required.  

For example;  

  Given a number 5;  

     We know the number is made of both the atomic number of the element and the highest quantum number.  

  It is easier for us to know the highest quantum number from the shell notation:  

        shell notation 1s²2s²2p¹

        highest principal quantum number is 2

  We are left with atomic number 5-2, which is 3

           The element is therefore Li.  

Part A.   5,     30,      58,      56,     99,     79,    19,     98,     9

             Li       Fe        I         Sb       U       Ta      S      Pa     N

Part B.   9,    99,    30,     95,     19,     47,     79

             N      U       Fe      Ra      S       Mo     Ta

Learn more:  

s-orbital brainly.com/question/9288609

#learnwithBrainly

4 0
3 years ago
1
Arisa [49]
Light energy into chemical energy
8 0
2 years ago
A sample of gas (1.9 mol) is in a flask at 21 °C and 697 mm Hg. The flask is opened and more gas is added to the flask. The new
Artyom0805 [142]

Answer: There are now 2.07 moles of gas in the flask.

Explanation:

PV=nRT

P= Pressure of the gas = 697 mmHg = 0.92 atm  (760 mmHg= 1 atm)

V= Volume of gas = volume of container = ?

n = number of moles = 1.9

T = Temperature of the gas = 21°C=(21+273)K= 294 K   (0°C = 273 K)

R= Value of gas constant = 0.0821 Latm\K mol

V=\frac{nRT}{P}=\frac{1.9\times 0.0821 \times 294}{0.92}=49.8L

When more gas is added to the flask. The new pressure is 775 mm Hg and the temperature is now 26 °C, but the volume remains same.Thus again using ideal gas equation to find number of moles.

PV=nRT

P= Pressure of the gas = 775 mmHg = 1.02 atm  (760 mmHg= 1 atm)

V= Volume of gas = volume of container = 49.8 L

n = number of moles = ?

T = Temperature of the gas = 26°C=(26+273)K= 299 K   (0°C = 273 K)

R= Value of gas constant = 0.0821 Latm\K mol

n=\frac{PV}{RT}=\frac{1.02\times 49.8}{0.0821\times 299}=2.07moles

Thus the now the container contains 2.07 moles.

6 0
2 years ago
Read the list of
Ksenya-84 [330]
Answer
B I’m pretty sure
Explanation
6 0
2 years ago
Read 2 more answers
Other questions:
  • Strong bases are
    5·1 answer
  • Fertilizers have nutrients that help plants grow. Sometimes, when it rains, fertilizers are washed away from farmland into ponds
    6·2 answers
  • Enter the net ionic equation representing solid chromium (iii) hydroxide reacting with nitrous acid. express your answer as a ba
    14·2 answers
  • What do you think happens to the air in the collid when ice cream melts ?
    5·2 answers
  • Which group has different numbers of valence electrons
    7·1 answer
  • What is the molar mass of Al2(SO4)3
    5·2 answers
  • Os This question is about elements from these families alkali metals, alkaline earth metals (Group
    14·2 answers
  • A good conductor of heat
    10·1 answer
  • Will mark BRAINLIEST question and choices in photos
    8·1 answer
  • Gas Law- please help!!!
    11·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!