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bogdanovich [222]
3 years ago
8

When placed in a freezer , liquid water turns into ice . What best describes this change ?

Chemistry
2 answers:
My name is Ann [436]3 years ago
5 0
This is a physical change
GREYUIT [131]3 years ago
4 0

Answer:

Freezing

Explanation:

liquid changing to a solid = Freezing

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How many ATOMS of sulfur are present in 2.30 moles of sulfur trioxide?
zysi [14]

Answer:

1.39 Atoms

Explanation:

When converting from moles to atoms, multiply the number of moles by Avogadro's number

Multiply 2.30 moles by Avogadro's number (6.022*10^23)

= 1.3851 Atoms

=1.39 Atoms (sigfig)

8 0
3 years ago
1. Baking powder is a 1:1 molar mixture of cream of tartar (KHC4H4O6) and baking soda (NaHCO3). A recipe calls for two teaspoons
olasank [31]

Answer:

3.57 g.

Explanation:

  • The ratio of cream of tartar (KHC₄H₄O₆) to baking soda (NaHCO₃) in the baking powder is 1:1.
  • We need to calculate the number of moles of (8.0 g) of cream of tartar (KHC₄H₄O₆) using the relation:<em> n = mass / molar mass,</em>

mass of cream of tartar (KHC₄H₄O₆) = 8.0 g.

molar mass of cream of tartar (KHC₄H₄O₆) = 188.1772 g/mol.

∴ n of cream of tartar (KHC₄H₄O₆) = mass /molar mass = (8.0 g) / (188.1772 g/mol) = 0.0425 mol.

  • Since the mole ratio of the two components is 1:1, the no. of moles of baking soda (NaHCO₃) should be added is 0.0425 mol.
  • The quantity of baking soda (NaHCO₃) can be calculated using the relation:

mass = n x molar mass = (0.0425 mol)(84.007 g/mol) = 3.57 g.

3 0
3 years ago
What type of energy does a ball have when it rolls down a hill?
spin [16.1K]
A. Kinetic energy
it is moving
5 0
2 years ago
How many moles of SnCl2 will be produced if 85.3 g of FeCl3 is reacted with an excess of Sn for the following reaction:2 FeCl3(s
Ronch [10]

Answer:

The answer to your question is 0.79 moles of SnCl₂  

Explanation:

Data

moles of SnCl₂ = ?

mass of FeCl₃ = 85.3 g

excess Sn

Balanced chemical reaction

                 2 FeCl₃  +  3 Sn  ⇒   3 SnCl₂  +  2 Fe

Process

1.- Convert the mass of FeCl₃ to moles

Molar mass of FeCl₃ = 56 + (35.5 x 3)

                                  = 56 + 106.5

                                  = 162.5 g

Use proportions to find the moles of FeCl₃

                       162.5 g -------------------- 1 mol

                         85.3 g -------------------  x

                         x = (85.3 x 1) / 162.5

                         x = 0.525 moles

2.- Find the number of moles SnCl₂

                     2 moles of FeCl₃ ----------------- 3 moles of SnCl₂

                     0.525 moles        ----------------- x

                     x = (0.525 x 3) / 2

                    x = 0.79 moles of SnCl₂                  

4 0
3 years ago
Match the element with its description. Match Term Definition Potassium A) Has properties of both metals and nonmetals Barium B)
max2010maxim [7]

Answer:

A) Has properties of both metals and nonmetals - Barium.

B) Nonreactive gas - Neon.

C) Great conductor of heat and electricity - Boron.

D) Malleable and highly reactive - Potassium.

Explanation:

hope it helps .

3 0
3 years ago
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