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
yawa3891 [41]
2 years ago
14

Select only one most suitable description

Chemistry
1 answer:
Annette [7]2 years ago
3 0
I believe it's a pure element
You might be interested in
An atom with 4 protons, 5 neutrons, and 4 electrons has an atomic mass of _____ amu. (Enter a whole number.) Numerical Answers E
igor_vitrenko [27]
Beryllium - Atom Mass: 9
8 0
3 years ago
Read 2 more answers
Pls help me in this:(​
antiseptic1488 [7]

Answer:

a) 26.98

b) 3

c) 3* 1.01 = 3.03

d) 3 *16 = 48

e) 26.98 + 3.03 + 48 = 78.01

f) 6.023 * 10²³

3 0
3 years ago
Part 1. A chemist reacted 12.0 liters of F2 gas with NaCl in the laboratory to form Cl2 gas and NaF. Use the ideal gas law equat
galben [10]

The mass of NaCl needed for the reaction is 91.61 g

We'll begin by calculating the number of mole of F₂ that reacted.

  • Volume (V) = 12 L
  • Temperature (T) = 280 K
  • Pressure (P) = 1.5 atm
  • Gas constant (R) = 0.0821 atm.L/Kmol
  • Number of mole (n) =?

PV = nRT

1.5 × 12 = n × 0.0821 × 280

18 = n × 22.988

Divide both side by 22.988

n = 18 / 22.988

n = 0.783 mole

Next, we shall determine the mole of NaCl needed for the reaction.

F₂ + 2NaCl —> Cl₂ + 2NaF

From the balanced equation above,

1 mole of F₂ reacted with 2 moles of NaCl.

Therefore,

0.783 mole F₂ will react with = 0.783 × 2 = 1.566 moles of NaCl.

Finally, we shall determine the mass of 1.566 moles of NaCl.

  • Mole = 1.566 moles
  • Molar mass of NaCl = 23 + 35.5 = 58.5 g/mol
  • Mass of NaCl =?

Mass = mole × molar mass

Mass of NaCl = 1.566 × 58.5

Mass of NaCl = 91.61 g

Therefore, the mass of NaCl needed for the reaction is 91.61 g

Learn more about stiochoimetry: brainly.com/question/25830314

6 0
2 years ago
a square boat made from iron has overall dimensions of 2.00 cm x 11.0 cm x 11.0 cm. it has a mass of 213 g. water has a density
Stolb23 [73]
Density of boat  =  \frac{MASS}{VOLUME}
                           
                          =  \frac{213 g}{(2 cm  *  11 cm  *  11cm)}
 
                          =   0.88 g / cm³

Since the density of water is greater than the density of the boat ( 1 > 0.88) then that means, the boat will NOT sink.

B.

4 0
3 years ago
Read 2 more answers
The ph of body fluids must remain fairly constant for the body to maintain homeostasis.
andrew11 [14]

Answer:

The answer is True

Explanation:

The Ph of bady fluids have different ranges but it should be nearly constant to maintain the health of the human, The PH of the human blood is from 7.35 to 7.45 and the other blood fluids have different ranges . The PH shouldn't drop below 6.9 because it is so dangerous for human health and result coma. if there is high value of PH this indicates high numbers of OH- and low value of PH  this indicates high numbers of H+

each organ has a certain PH value to do its function very well ,there is an organ needs acidic environment to work well and other organ needs an alkaline environment to do its work.

4 0
3 years ago
Other questions:
  • For which substance does (triangle) Hf = 0
    5·1 answer
  • What is the relationship between molar mass in grams per mole (g/mol) and average atomic mass in amu of each element?
    14·1 answer
  • You are in Paris and want to buy peaches for lunch. The sign on the fruit stand indicates that peaches cost 11.50 euros per kilo
    8·1 answer
  • Whats an electronegativity?
    5·2 answers
  • Iron filings react with sulphuric acid to produce hydrogen and iron(II) sulphate
    15·2 answers
  • How many grams of KOH are required to prepare 500. mL of 0.450 KOH solution?
    5·1 answer
  • Which wave has the longest wavelength ?Shortest?
    10·2 answers
  • Which process causes the greatest increase in the distance between particles?
    6·1 answer
  • How many calories of energy will 20 grams of carbohydrates provide if 1 gram provides 4 calories?
    13·2 answers
  • Write the name of the branched alkane next to the drawing of the molecule.
    11·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!