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
harina [27]
3 years ago
14

The image above shows a type of metamorphic rock called gneiss. Gneiss is characterized by alternating bands of light and dark m

inerals. The bands in this particular sample of gneiss have been folded.
The characteristics of this rock developed due to _____ and _____ during the rock's formation.
Chemistry
1 answer:
finlep [7]3 years ago
4 0

Answer: first blank is heating second blank is pressure i think but i know that its NOT freezing

Explanation:

I did it and got it right

You might be interested in
Which statement best describes how an existing theory is often affected by the development of new technology?
grigory [225]

Answer: An existing theory is modified so that it can explain both the old and new observations.

Explanation:

4 0
3 years ago
1. How much taller is the average person today than the average person 100 years ago?
andreev551 [17]
5 inches I am not sure but I THINK it’s 5 inches sry if I’m wrong
4 0
3 years ago
Why is the formation of fructose-1,6-bisphosphate a step in which control is likely to be exercised in the glycolytic pathway
Yakvenalex [24]
The answer is/6-(1-2)

Explain why it is not that because it shown
5 0
3 years ago
If 21.00 mL of a 0.68 M solution of C6H5NH2 required 6.60 mL of the strong acid to completely neutralize the solution, what was
Andru [333]

Answer:

pH = 2.46

Explanation:

Hello there!

In this case, since this neutralization reaction may be assumed to occur in a 1:1 mole ratio between the base and the strong acid, it is possible to write the following moles and volume-concentrations relationship for the equivalence point:

n_{acid}=n_{base}=n_{salt}

Whereas the moles of the salt are computed as shown below:

n_{salt}=0.021L*0.68mol/L=0.01428mol

So we can divide those moles by the total volume (0.021L+0.0066L=0.0276L) to obtain the concentration of the final salt:

[salt]=0.01428mol/0.0276L=0.517M

Now, we need to keep in mind that this is an acidic salt since the base is weak and the acid strong, so the determinant ionization is:

C_6H_5NH_3^++H_2O\rightleftharpoons  C_6H_5NH_2+H_3O^+

Whose equilibrium expression is:

Ka=\frac{[C_6H_5NH_2][H_3O^+]}{C_6H_5NH_3^+}

Now, since the Kb of C6H5NH2 is 4.3 x 10^-10, its Ka is 2.326x10^-5 (Kw/Kb), we can also write:

2.326x10^{-5}=\frac{x^2}{0.517M}

Whereas x is:

x=\sqrt{0.517*2.326x10^{-5}}\\\\x=3.47x10^-3

Which also equals the concentration of hydrogen ions; therefore, the pH at the equivalence point is:

pH=-log(3.47x10^{-3})\\\\pH=2.46

Regards!

6 0
3 years ago
When polonium-210 emits an alpha particle, the child isotope has an atomic mass of
Sergeeva-Olga [200]

Answer: The child isotope has an atomic mass of 206.

Explanation:

Alpha decay : When a larger nuclei decays into smaller nuclei by releasing alpha particle. In this process, the mass number and atomic number is reduced by 4 and 2 units respectively.

General representation of an element is given as:   _Z^A\textrm{X}

where,

Z represents Atomic number

A represents Mass number

X represents the symbol of an element

General representation of alpha decay :

_Z^A\textrm{X}\rightarrow _{Z-2}^{A-4}Y+_2^4\alpha

_{84}^{210}\textrm{Po}\rightarrow_{82}^{206}\textrm{Pb}+_2^4\textrm{He}

8 0
3 years ago
Read 2 more answers
Other questions:
  • What is the mass of 3.00 moles of magnesium chloride, MgCl2? Express your answer with the appropriate units.
    12·1 answer
  •     Which of these is considered a cation
    6·1 answer
  • What are some examples of van der waals forces?
    5·1 answer
  • For a molecule to be considered inorganic it must not contain ?
    12·1 answer
  • U copy and pasted what he said bassically...
    12·1 answer
  • Please Answer, thank you so much!
    7·1 answer
  • Which of these energy resources does NOT pollute when used?
    8·1 answer
  • What is the pH of a 0.00200 M HCl solution?
    13·1 answer
  • What science govern in nanostructure?​
    11·2 answers
  • The image shows a representative sample of 50 atoms of a fictious element, called lemonium ( Le ). Lemonium consists of three is
    6·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!