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
sergeinik [125]
3 years ago
12

Determine the number of protons and neutrons in an isotope of bromine (br) with a mass number/atomic mass of 79. (the atomic num

ber of bromine is 35.)
Chemistry
1 answer:
miskamm [114]3 years ago
8 0
44 neutrons and 35 protons. The number of neutrons you have is equal to the atomic mass minus the atomic number.
You might be interested in
The superheated water vapor is at 15 MPa and 350°C. The gas constant, the critical pressure, and the critical temperature of wat
Vesnalui [34]

Answer:

0.01917 m^3/kg.

Explanation:

Given:

P = 15 MPa

= 1.5 × 10^4 kPa

T = 350 °C

= 350 + 273

= 623 K

Molar mass of water, m = (2 × 1) + 16

= 18 g/mol

= 0.018 kg/mol

R = 0.4615 kPa·m3/kg·K

Using ideal gas equation,

P × V = n × R × T

But n = mass/molar mass

V = (R × T)/P

V/M = (R × T)/P × m

= (0.4615 × 623)/1.5 × 10^4

= 0.01917 m^3/kg.

4 0
3 years ago
In a _______ reaction, the compound breaks down; in a _______ reaction, a single compound is assembled from two or more substanc
Alexxx [7]
It's letter C. When ever you read "breaks down" always think decomposition. When you read that compound get together to form "a single" compound, think synthesis.
7 0
3 years ago
Read 2 more answers
Swim ability is it materials ability to burn in the presence of
eduard

Answer: Flammability is a material's ability to burn in the presence of oxygen.

Explanation: Chemical properties can be observed only when the substance changes into one or more different substances through chemical reactions or transformations. One of the chemical properties is flammability.

Flammability is a material's ability to burn in the presence of oxygen.

Remember, oxygen doesn't burn. Precisely flammable substances obtain substances that burn. Oxygen remains an oxidizing agent, which means it supports the combustion process. Oxygen causes other objects to catch fire at low temperatures and burns hotter and faster. But oxygen itself does not burn. Consequently, if you at present deliver fuel and fire, adding oxygen will provide the fire.

Carbon dioxide is the result of combustion. An example can be seen in firewood in a fireplace. One of the chemical properties of carbon-based wood is having the ability to burn. Chemically the wood turns into carbon dioxide when it burns and leaves a residue of ash. Furthermore, this ash residue cannot be turned back into the wood. Chemical changes result in new substances.

Consider an example of a combustion reaction to methane gas:

Our balanced equation for methane combustion implies that every one CH₄ molecule reacts with two O₂ molecules. The product of combustion is one carbon dioxide molecule and two steam or water vapor molecules.

6 0
3 years ago
How does Fluoroanimonic acid melt things?
Tomtit [17]

Answer:s the temperature is increased, fluoroantimonic acid decomposes and generates hydrogen fluoride gas (hydrofluoric acid). ... 1  Fluoroantimonic acid has a H0 (Hammett acidity function) value of -31.3. Dissolves glass and many other materials and protonates nearly all organic compounds (such as everything in your body)

tall me is this what you looking for

4 0
3 years ago
A chromate ion consist of four oxygen atom bonded to be a chromium atom. It has two extra electrons. the formula for this
natali 33 [55]

Answer:

Cr04^2-

Explanation:

 

6 0
3 years ago
Other questions:
  • If the molar mass is 144 g/mol what is the molecular formula? valproic acid
    11·1 answer
  • In the chemical formula for an ionic compound, which item is written first?
    8·2 answers
  • Is it reasonable to expect that the atom model will change again in time?
    5·1 answer
  • How do you find the average density?
    8·1 answer
  • If there are 2.54cm in one inch how many Inches are in 19.9​
    5·2 answers
  • Which direction does the sun to move across the sky
    12·2 answers
  • How many atoms are in 3N4010 ​
    7·1 answer
  • 5. What types of surfaces would result in greater friction?
    5·1 answer
  • 3. If you needed to make 100 mL of a 0.2 M fruit drink solution from the 1.0 M fruit drink solution, how would you do it
    8·1 answer
  • Study the trend of the graph from part C. What would the reaction time be if 3 tablespoons (45 milliliters) of water had been us
    15·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!