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
Paul [167]
4 years ago
9

-3 × 4=? ....................​

Chemistry
2 answers:
blagie [28]4 years ago
8 0

Answer:

-12

Explanation:

a negative times a positive is negative

e-lub [12.9K]4 years ago
5 0
-12 ...................
You might be interested in
An element belongs to the period 4 and group VB, write down its electron configuration?
Serjik [45]

Answer:

her 56th album was the only way of her career to village in a few hours of her 6AM career as a job creation in a day and a day 5th century fox in a few hours of

4 0
3 years ago
The half-life of tritium is 12.3 years. If 48.0 mg of tritium is released from a nuclear power plant during the course of a mish
Thepotemich [5.8K]

Half life is defined as the time when the final concentration reduced to half of the initial value.

Thus, for first half life, the remaining percentage of the reactant is 50 percent that is \frac{50}{100}=\frac{1}{2}

Now, for second half life, the remaining  percentage will be 50 percent of the remaining 50 percentage that is \frac{50}{2}=25 \frac{25}{100}=\frac{1}{4} or \frac{1}{2^{2}}

Thus, general formula for n  half lives =\frac{1}{2^{n}}

Now, 98.4 years is equal to eighth times 12.3 years that is \frac{1}{2^{8}} =\frac{1}{256} remaining material.

Therefore, mass of the nuclide will remain after 98.4 years= \frac{48.0 mg}{256}

= 0.1875 mg

Mass of remaining nuclide after 98.4 years =  0.1875 mg


4 0
4 years ago
A chemist observed bubbling and fizzing after adding an acid solution to a
Lisa [10]

Answer:

a chemical reaction occured

Explanation:

bubbling and fizzing after adding a substance, most offten means a chemical reaction is happening

7 0
3 years ago
Why is denaturation dangerous for the body?
Arturiano [62]

Answer:

Denaturation causes loss of enzyme activity which is necessary for biochemical reaction.

Hence many biological process(respiration,digestion,excretion) won't work properly.

Explanation:

Enzymes : These are biological catalyst made of proteins.E.g Pepsin, tyrosine (human digestion)

Denaturation: loss of Quaternary ,tertiary and secondary structure of proteins and nucleic acid because of extreme conditions of temperature , pressure ,pH etc.

When denaturation occur enzymes loss their specific structure, so they can't carry out various life process (e.g respiration, digestion ,excretion).

Enzymes are involved in all biological reaction and work only at optimum temperature ,pH and pressure(human body condition ).

4 0
3 years ago
In which 1.0-gram sample are the particles arranged in a crystal structure? cacl2(s) c2h6(g) ch3oh() cai2(aq)?
Feliz [49]
Answer is: CaCl₂(s), calcium chloride.

Calcium cations and chlorine anions have a crystal structure in this solid inorganic salt. Ions have <span>the ordered arrangement.</span><span>
Ethane (C</span>₂H₆) is gas, g is chemistry abbreviations or physical state symbol for gas, gases do not have a crystal structure.
Methanol (CH₃OH) is liquid, l is chemistry abbreviations or physical state symbol for liquids, it do not have a crystal structure.
Calcium iodide is dissolved in water, aqueous solution (aq) do not have a crystal structure.
3 0
3 years ago
Other questions:
  • Which energy transformation takes place when a firecracker explodes
    5·1 answer
  • A 500 ml of naoh aqueous solution was prepared by dissolving 10.0 grams of naoh pellets in di water using a 500 ml volumetric fl
    10·1 answer
  • Which layer of soil often contains litter?
    7·1 answer
  • How do you find the equilibrium constant?
    8·1 answer
  • Plzz help mee plzz I would really appreciate it
    11·1 answer
  • If the solution of HNO3 has a pH of 8 and a pOH of 6 is it an acid, base or neutral
    9·1 answer
  • Can you slap me 360°​
    7·2 answers
  • How many atoms of mercury are required to produce 3.49 L of H2 gas (density =
    11·1 answer
  • What mass of propane could burn in 48.0 g of oxygen
    7·1 answer
  • Which of the following are hydrocarbons?
    7·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!