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
vaieri [72.5K]
3 years ago
5

Which two systems first respond to burning your finger?

Chemistry
2 answers:
Bess [88]3 years ago
7 0

Answer:

B. is my guess

I'm sorry if I'm wrong

God bless :)

Citrus2011 [14]3 years ago
6 0

Answer: A and C

Explanation: it is A. Nervous and digestive.

C. Respiratory and circulatory

You might be interested in
Predict the products of the double replacement reaction 2KOH + H2504 --?
Darina [25.2K]
What the heck is this 9287262729272727272727171
4 0
3 years ago
Crystals are characterized by particular patterns that repeat in how many dimensions? A. three dimensions
Andreyy89

A option is correct answer   .

8 0
3 years ago
Read 2 more answers
A sample of lemon juice is found to have a pH of 2.3. What is the concentration of hydrogen ions in the lemon juice?
Elenna [48]

Answer: It's equal to 10^(-2.3), or 0.00501 M, or 5.01 * 10^-3 moles/Liter

Explanation:

Well, pH = - log[H+]

Or, in words, pH is equal to -1 multiplied by the logarithm (base 10) of the hydrogen ion concentration.   So you have 2.3 = -log[H+].    We want to isolate the H+, so let's start simplifying the right hand side of the equation. First, we multiply both sides by -1.   -2.3=log[H+]   Now, the definition of a logarithm says that if the log (base 10) of [H+] is -2.3, then 10 raised to the -2.3 power is [H+]   So on each side of the equation, we raise 10 to the power of that side of the equation.   10^(-2.3) = 10^(log[H+])   and because 10^log cancels out...   10^(-2.3) = [H+]   Now we've solved for [H+], the hydrogen ion concentration!

7 0
3 years ago
What is the enthalpy of reaction?
erma4kov [3.2K]

Answer:

Enthalpy is the amount of heat released or absorb. The total enthalpy can be found by subtracting the products' enthalpy by the reactants' enthalpy

4 0
3 years ago
Read 2 more answers
What is the molecular formula of the hydrocarbon whose molar mass is 536 g/mol and contains 89.55 w/w% carbon?
leonid [27]

Given the percentage composition of HC as C → 81.82 % and H → 18.18 %

So the ratio of number if atoms of C and H in its molecule can will be:

C : H = 81.82 12 : 18.18 1 C : H = 6.82 : 18.18 = 6.82 6.82 : 18.18 6.82 = 1 : 2.66 ≈ 3 : 8

So the Empirical Formula of hydrocarbon is:

C 3 H 8

As the mass of one litre of hydrocarbon is same as that of C O 2 The molar mass of the HC will be same as that of C O 2 i.e 44 g mol

Now let Molecular formula of the HC be ( C 3 H 8 ) n

Using molar mass of C and H the molar mass of the HC from its molecular formula is:

( 3 × 12 + 8 × 1 ) n = 44 n So 44 n = 44 ⇒ n = 1

Hence the molecular formula of HC is C 3 H 8

Does that help?

7 0
3 years ago
Other questions:
  • What are standards or attributes of a design that can be measured.
    5·1 answer
  • Explain why alchemy is not as reliable as modern day science
    13·1 answer
  • What is the [H3O+] in a solution with [OH-] = 1.0 x 10-12 M?
    9·1 answer
  • Which of the following statements is true?
    7·2 answers
  • what is the percent by mass concentration of a solution that contains 5.30 grams of salt dissolved in 19.7 g of water​
    10·1 answer
  • Which of the following is not a reason why chemical bonds are important
    8·1 answer
  • What happens when sugar is heated? Give a balanced equation
    7·1 answer
  • Why are fingertips wet with saliva before counting money?​
    11·1 answer
  • The diagram below shows the different phase transitions that occur in matter.
    13·2 answers
  • The limiting reactant, O2, can form up to 2.7 mol Al2O3. What mass of Al2O3 forms?
    9·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!