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
Scorpion4ik [409]
3 years ago
9

When a white powder is added to a liquid in a beaker at room temperature, the beaker becomes too hot to touch. What kind of reac

tion is this an example of?
A. a fusion reaction
B. a combustion reaction
C. an exothermic reaction
D. an endothermic reaction
Chemistry
2 answers:
Varvara68 [4.7K]3 years ago
6 0
<span>C. an exothermic reaction
</span>
liberstina [14]3 years ago
3 0
The answer is <span>an C.exothermic reaction</span>
You might be interested in
Balance the equation.<br><br> SiO2 + <br> CaC2 → <br> Si + <br> CaO + <br> CO2
Sunny_sXe [5.5K]
Co2 is oxygen because that what you took to ask ppl for
6 0
3 years ago
A sample of 3.62 moles of diphosphorous trioxide is
Sindrei [870]

H_3PO_32H_3PO_32H_3PO_3P_2O_3Answer:

B

Explanation:

This question is about stoichiometry. From the balanced equation P_2O_3 + 3H_2O⇒2H_3PO_3, we see that 3 moles of water is needed to react with 1 mole of P_2O_3.

This means that, to fully react 3.62 moles of P_2O_3, we would need 3*3.62 or  10.86 moles of water. However, we only have 6.31 moles, so water is the limiting reactant.

Since 3 moles of water react with 1 mole of P_2O_3, 6.31 moles of water can fully react with 6.31÷3 or 2.1033 moles of P_2O_3.

From the balanced equation, we see that every mole of P_2O_3 reacted gets you 2 moles of 2H_3PO_3. Therefore, 2.1033 moles of P_2O_3 would give you approximately 4.21 moles of H_3PO_3.

5 0
2 years ago
2 PUIS
avanturin [10]

Answer: C the study of living things

Explanation:

5 0
3 years ago
Read 2 more answers
4. How many moles are in 54.0 grams of Silver?
sineoko [7]
4. Molar mass of silver m Ms~=108 g/mol
Hence there are n=54*(1/108)=0.5 mols of Silver in 54 grams of Silver.

5. 6.3*(108/1)=680.4g

6. Avogadro's number : Na~=6.022×10^23<span>. </span>
6.0*(6.022*10^23/1)=36.132*10^23 atoms

7. Molar mass of Krypton : Mk=84 g/mol
112/84=1.33 moles of Kr

8. 1.93*10^24*(1/(6.022×10^23))=3.2 moles KF

9. Molar mass of Silicon : Ms=28 g/mol
86.2*(1/28)*(6.022×10^23/1)=18.5*10^23 atoms of silicon

10. Molar mass of Magnesium : M1=24 g/mol
4.8*10^24*(1/(6.022×10^23))*(24/1)=191 g Mg
7 0
3 years ago
4. Finally, convert hemoglobin concentration from g/dL to millimoles per Liter (milliMolar or mM). Hemoglobin has a molecular we
prohojiy [21]

To make 1 Molar solution of hemoglobin ; 1600 grams of hemoglobin will be dissolved in 1 liter of water

The molecular weight of Hemoglobin is approximately  16,000 Daltons, when hemoglobin is converted to mM

16000 Dalton = 16000 ( g/mol )

given that 1 Dalton = 1 g/mol

To make 1 molar solution of hemoglobin using 1 liter of water

1 liter = 1000 grams

16000 Dalton = 16000 g/mol

Hence 16,000 grams of Hemoglobin is required to make 1 Molar solution of hemoglobin using 1 liter of water.

learn more : brainly.com/question/23517096

8 0
2 years ago
Other questions:
  • True or False, the central atom in a molecule is the one with the highest electron affinity.
    6·1 answer
  • What air moves horizontally or parallel to the ground?
    7·1 answer
  • How many moles of water are formed when 22 mol of methane combusts?
    5·1 answer
  • Which one of these is a compound? a) air b) carbon dioxide c) oxygen and d) carbon
    10·2 answers
  • When a chemist collects hydrogen gas over water, she ends up with a mixture of hydrogen and water vapor in her collecting bottle
    10·1 answer
  • How many grams are in 7.32 x 1023 molecules of potassium carbonate (K2CO3)?
    6·1 answer
  • Sub-atomic particles like negatively charged electrons, positively charged
    12·1 answer
  • 9. A box is pushed 1.5 m to the right in 5 s. What is the box’s average speed to the nearest hundredth of a m/s? *
    11·1 answer
  • What is the relationship between plants soil and nutrients?
    12·1 answer
  • Which of the following points is/are true for plasma?
    5·2 answers
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!