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
mestny [16]
3 years ago
9

Can anyone help me with this please ​

Chemistry
1 answer:
sergij07 [2.7K]3 years ago
7 0

Answer:

A) The reaction absorbs energy

This is because the before reading show the temperature of 20°C whereas the after reading show the temperature of 13 °C

<h3><em><u>MORE</u></em><em><u> </u></em><em><u>TO</u></em><em><u> </u></em><em><u>KNOW</u></em><em><u> </u></em></h3>

  • The reaction in which energy is absorbed is known as <em><u>Endothermic</u></em><em><u> </u></em><em><u>reaction</u></em><em><u> </u></em>

  • The reaction in which energy is releases is known <em><u>Exothermic</u></em><em><u> </u></em><em><u>reaction</u></em>
You might be interested in
How many grams are in 1 mole of Pb3(PO4)4?
kvasek [131]

Answer:

In 1 mol of Pb₃(PO₄)₄ occupies 1001.48 grams

Explanation:

This compound is the lead (IV) phosphate.

Grams that occupy 1 mole, means the molar mass of the compound

Pb = 207.2  .3 = 621.6 g/m

P = 30.97 .4 = 123.88 g/m

O = (16 .  4) . 4 = 256 g/m

621.6 g/m + 123.88 g/m + 256 g/m = 1001.48 g/m

6 0
3 years ago
Read 2 more answers
Calculate the molarity of 65.3 grams of sugar(342.3 g/mol), c12h22011 in 750 ml of solution.
k0ka [10]

Answer:

0.254 M

Explanation:

If the formula mass of sugar is 342.3 g/mol, and there are 65.3 g, then there are 65.3/342.3=0.190768 mol.

Also, 750 mL = 0.750 L.

molarity = (moles of solute)/(liters of solution)

molarity = 0.190768/0.750 = <u>0.254</u><u> </u><u>M</u>

8 0
2 years ago
How many significant figures in 8400
IrinaK [193]

Answer:

there are two significant figures is the number 8400

Explanation:

5 0
3 years ago
Read 2 more answers
What physical property of mercury makes it well suited for use in a thermometer?
MArishka [77]

Answer:

because mercury has low melting point

Explanation:

7 0
3 years ago
Read 2 more answers
What do scientists mean when they refer to population
Luden [163]

population is the number of species living in a given area if this is regarding biology or earth studies :)

8 0
3 years ago
Read 2 more answers
Other questions:
  • Aluminum oxide was prepared by heating 225 g of chromium (III) oxide with 125 g of aluminum. Calculate the percent yield of 100.
    11·1 answer
  • What is the molar mass of 81.50 g of gas exerting a pressure of 1.75 ATM on the walls of a pressure or 1.27 ATM on the walls of
    12·1 answer
  • What is the product of 3 x 10² kg and 2 x 10-3<br> kg?
    15·1 answer
  • If a balloon is squeezed, what happens to the pressure of the gas inside the balloon?
    7·2 answers
  • The equation for photon energy, E, is E=hcλ where h = 6.626×10−34 J⋅s (Planck's constant) and c = 2.99×108 m/s (the speed of lig
    6·1 answer
  • The amount of carbon dioxide in the atmosphere would greatly increase if there were fewer
    12·1 answer
  • 29. What is E for a system which has the following two steps:
    12·1 answer
  • Benzophenone has a normal freezing point of +48.1 oC, with freezing point depression constant Kfpt = − 9.78 oC/m. A 0.1500 molal
    8·1 answer
  • Is PDB ionic or Covalent?
    10·1 answer
  • How many grams of aluminum would be in 3.0 moles of aluminum?
    13·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!