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
Neko [114]
4 years ago
10

HURRY HELPPP QUICKKK

Chemistry
2 answers:
Anna [14]4 years ago
5 0
Exothermic is the release of heat during reaction
the answer is C
Sever21 [200]4 years ago
4 0
A hot touch means that heat is leaving the system, so the answer is C. exothermic
You might be interested in
Why are biopharmaceuticals in high demand?
elena-s [515]

Answer:

the market is largely driven by the growing population, increasing burden of chronic disease, and rising inclination toward targeted therapy.

Explanation:

also, the huge demand of biopharmaceutical is facilitated by an accelerating focus in research and related investment.

3 0
3 years ago
Hydrofluoric acid (HF) can be prepared according to the following equation:
Artemon [7]

Given the balanced equation:

( Reaction type : double replacement)

CaF2 + H2SO4 → CaSO4 + 2HFI

We can determine the number of grams prepared from the quantity of 75.0 H2SO4, and 63.0g of CaF2 by converting these grams to moles per substance.

This can be done by evaluating the atomic mass of each element of the substance, and totaling it to find the molecular mass.

For H2SO4 or hydrogen sulfate it's molecular mass is the sum of the quantity of atomic mass per element. H×2 + S×1 + O×4 = ≈1.01×2 + ≈32.06×1 + ≈16×4 = 2.02 + 32.06 + 64 = 98.08 u (Dalton's or Da) or g / mol.

For CaF2 or calcium fluoride, it's molecular mass adds 1 atomic mass of calcium and 2 atomic masses of fluoride due to the number of atoms.

Ca×1 + F×2 = ≈40.07×1 + ≈19×2 = 40.08 + 38 = 78.07 u (Da or Dalton's) or g / mol.

3 0
3 years ago
Read 2 more answers
How do i design a controlled experiment to appropriately test a hypothesis?
Virty [35]

Answer:

you need only one independent variable because if not, you wont know what factors have changed your experiment.

Explanation:

3 0
3 years ago
The most common compound on earht is:
OlgaM077 [116]
The most common compound on earth is cellulose because it has enough energy to be the next source for biofuels. 
6 0
3 years ago
What element behaves MOST like magnesium (Mg)?<br> A) S <br> B) Si <br> C) Sn <br> D) Sr
tatyana61 [14]

Strontium (Sr). Elements in the same group of the periodic table have similar characteristics.

3 0
3 years ago
Read 2 more answers
Other questions:
  • Mengapakah gelung pemanas di dalam cerek elektrik berada di dasar cerek?​
    12·1 answer
  • Are rocks on Earth's surface stable? What might cause rocks to change? Explain your reasoning.
    15·1 answer
  • Why are measurements important for science?
    10·1 answer
  • Which product forms from the synthesis reaction between strontium (Sr) and sulfur (S)? O A. Sres O B. Srs O C. SS2 O D. Sr S2​
    7·2 answers
  • A thermogram is an image produced
    5·1 answer
  • Which best explains the difference between a monomer and a polymer?
    15·2 answers
  • Plz helppppp!! For 25 points!!
    7·1 answer
  • What evidence is there of energy release after chemical reaction
    10·1 answer
  • How is scientific observation done properly and safely using laboratory equipment?
    7·1 answer
  • What is the purpose of molecular models?
    13·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!