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
Zanzabum
3 years ago
12

A certain atom has an atomic number of four. how many protons does it have? 8 2 0 4 description

Chemistry
2 answers:
Contact [7]3 years ago
4 0
4 protons the number of proton has the same number of electron [which is the same as atomic number]
const2013 [10]3 years ago
3 0
4 protons the number of proton has the same number of electron
You might be interested in
Answer please hurry I need the answer
Nady [450]

Homologous chromosomes are chromosome with the same relative shape and gene location. However the allele composition may vary.

So I would say B, but only if the orange represents the same allele for a gene and not the same gene.

6 0
3 years ago
Calculate the ratio of H+ ions to OH– ions at a pH = 6. Find the concentration of H+ ions to OH– ions listed in Table B of your
AlekseyPX

Answer:

You must know the concept of pH of a solution and its relation to the concentration of H+ and OH- ions. pH is a measure of the substance's acidity or basicity. From the definition of Arrhenius, an acid contains an H+ while a base contains a OH- ion. From this definition, we can say that an acidic substance has a higher concentration of H+ ions. Now, I'll introduce here that pH is the value of the negative logarithm of the concentration of H+. In equation,

pH = -log[H+]

The term pOH is therefore also, pOH = -log[OH-]. Therefore, the relationship that connects the two negative logarithms is:

pH + pOH = 14

The pH scale starts from 1 being the most acidic to 14 being the most basic. The neutral pH is 7. Thus, for a pH of 7, the H+ and the OH- concentrations are equal. 

pH = 7 = -log[H+]

[H+] = 1×10⁻⁷ mol/L = [OH-]

Since the concentrations are equal, the ratio is equal to 1.

7 0
4 years ago
Read 2 more answers
(06.01 LC)
Deffense [45]
It’s a liquid cause liquid move past one another
3 0
3 years ago
Read 2 more answers
If a pork roast must absorb kJ to fully cook, and if only 10% of the heat produced by the barbecue is actually absorbed by the r
kolezko [41]

Answer:

1,033.56 grams of carbon dioxide was emitted into the atmosphere.

Explanation:

C_3H_8(g)+5O_2(g)\rightarrow 3CO_2(g)+4H_2O(g),\Delta H_{rxn}=-2044 kJ/mol (assuming)

Energy absorbed by pork,E = 1.6\times 10^3 kJ (assuming)

Total energy produced by barbecue = Q

Percentage of energy absorbed by pork = 10%

10\%=\frac{E}{Q}\times 100

Q=\frac{E}{10}\times 100=\frac{1.6\times 10^3 kJ}{10}\times 100=1.6\times 10^4 kJ

Since, it is a energy produced in order to indicate the direction of heat produced we will use negative sign.

Q = -1.6\times 10^4 kJ

Moles of propane burnt to produce Q energy =n

n\times \Delta H_{rxn}=Q

n=\frac{Q}{\Delta H_{rxn}}=\frac{-1.6\times 10^4 kJ}{-2044 kJ/mol}=7.83 mol

According to reaction , 1 mol of propane gives 3 moles of carbon dioxide. then 7.83 moles of will give:

\frac{1}{3}\times 7.83 mol=23.49 mol carbon dioxide gas.

Mass of 23.49 moles of carbon dioxide gas:

23.49 mol × 44 g/mol =1,033.56 g

1,033.56 grams of carbon dioxide was emitted into the atmosphere.

8 0
3 years ago
When a certain isotope such as Pu-239 is hit by a neutron it will always split into the same smaller nuclei.
FinnZ [79.3K]
Mi opinión es false but I'm sure I’m sorry my friend
7 0
3 years ago
Other questions:
  • The acidity and basicity of a solution can be described by its ph. a solution is acidic if
    14·1 answer
  • A) based on the spectrum, (i) write the ground-state electron configuration of the element, and (ii) identify the element. (b) c
    8·1 answer
  • A 7.11g sample of potassium chlorate was decomposed according to the following equation: 2KCLO3 -->2KCL + 3O2 How many moles
    9·1 answer
  • Please help!!!!!!!!!!!!
    6·1 answer
  • A 0.1090 g sample of copper metal is dissolved in 60. ml of concentrated hno3 to form cu2+ ions and then water is added to make
    10·1 answer
  • PH of 6.7X10^-4 of H2SO4
    12·1 answer
  • Review the equation below.
    10·2 answers
  • heeellllllllllllllllllllllpppppppppppppppppppppppppppppppppppppppppppppppppppppppppppppppppppppppppppppppppppppppppppppppppppppp
    12·1 answer
  • In cellular respiration the energy starts as ____________ energy and ends up as ______________ energy.
    9·1 answer
  • Chandra wants to know how many moles are contained in 150.0 g ccl4 (carbon tetrachloride). what quantity of ccl4 should she use
    6·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!