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
Lesechka [4]
2 years ago
12

All cartilage ossifies. True or false will mark brainliest!

Chemistry
1 answer:
chubhunter [2.5K]2 years ago
6 0
I’m pretty sure true, just not your skull at birth hehe. hope this helps :)
You might be interested in
The two isotopes of chlorine are LaTeX: \begin{matrix}35\\17\end{matrix}Cl35 17 C l and LaTeX: \begin{matrix}37\\17\end{matrix}C
Kay [80]

<u>Answer:</u> The percentage abundance of _{17}^{35}\textrm{Cl} and _{17}^{37}\textrm{Cl} isotopes are 77.5% and 22.5% respectively.

<u>Explanation:</u>

Average atomic mass of an element is defined as the sum of masses of each isotope each multiplied by their natural fractional abundance.

Formula used to calculate average atomic mass follows:

\text{Average atomic mass }=\sum_{i=1}^n\text{(Atomic mass of an isotopes)}_i\times \text{(Fractional abundance})_i   .....(1)

Let the fractional abundance of _{17}^{35}\textrm{Cl} isotope be 'x'. So, fractional abundance of _{17}^{37}\textrm{Cl} isotope will be '1 - x'

  • <u>For _{17}^{35}\textrm{Cl} isotope:</u>

Mass of _{17}^{35}\textrm{Cl} isotope = 35 amu

Fractional abundance of _{17}^{35}\textrm{Cl} isotope = x

  • <u>For _{17}^{37}\textrm{Cl} isotope:</u>

Mass of _{17}^{37}\textrm{Cl} isotope = 37 amu

Fractional abundance of _{17}^{37}\textrm{Cl} isotope = 1 - x

Average atomic mass of chlorine = 35.45 amu

Putting values in equation 1, we get:

35.45=[(35\times x)+(37\times (1-x))]\\\\x=0.775

Percentage abundance of _{17}^{35}\textrm{Cl} isotope = 0.775\times 100=77.5\%

Percentage abundance of _{17}^{37}\textrm{Cl} isotope = (1-0.775)=0.225\times 100=22.5\%

Hence, the percentage abundance of _{17}^{35}\textrm{Cl} and _{17}^{37}\textrm{Cl} isotopes are 77.5% and 22.5% respectively.

6 0
3 years ago
Where are halogens on the periodic table?
elena-14-01-66 [18.8K]
Group 17. the 2nd column from the right in the periodic table.
3 0
2 years ago
GIVING BRAINLIEST!! PLEASE HELP
PIT_PIT [208]

Answer:

d

Explanation:

6 0
2 years ago
Read 2 more answers
What is the frequency of radiation whose wavelength is 2.51 x 10 -7m?​
hodyreva [135]

The frequency of radiation : 1.2 x 10¹⁵ Hz

<h3>Further explanation </h3>

Radiation energy is absorbed by photons

The energy in one photon can be formulated as

\large{\boxed{\bold{E\:=\:h\:.\:f}}}

Where

h = Planck's constant (6,626.10⁻³⁴ Js)

f = Frequency of electromagnetic waves

<h3>f = c / λ </h3>

c = speed of light

= 3.10⁸  m/s

λ = wavelength

Wavelength-λ is 2.51 x 10⁻⁷m

The frequency :

\tt f=\dfrac{3.10^8}{2.51\times 10^{-7}}=1.2\times 10^{15}

8 0
3 years ago
20 POINTS + BRAINLIEST, HELP
lakkis [162]
It’s 2.0 molecules.

Explanation:

It’s kind of obvious, haha.
6 0
3 years ago
Read 2 more answers
Other questions:
  • What causes pressure inside an inflated soccer ball?
    11·2 answers
  • What role does the wire play in voltaic cell
    15·1 answer
  • Alcl3+Na =NaCl+ Al .did Al change oxidation number
    12·1 answer
  • The ionization constant (Ka) of HF is 6.7 X 10 ^-4. Which of the following is true in a 0.1 M solution of this acid?
    14·2 answers
  • Which one below will can cause the reaction rate to increase?
    15·1 answer
  • . When 0.022189 is correctly rounded to two significant figures the number becomes
    10·1 answer
  • 4. Determine the number of significant figures in each of the following (1 pt each, 3 pts total)
    12·1 answer
  • Element R and Element Q have the same number of valence electrons. These elements have similar chemical behavior, but element R
    13·1 answer
  • If further increases in substrate concentration do not result in further increases in reaction rate, then an enzyme is likely
    11·1 answer
  • Webb has calculated the percent composition of a compound. How can he check his result?
    13·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!