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algol [13]
3 years ago
8

Negative ions have ______ (More or Less) protons than electrons.

Chemistry
2 answers:
VMariaS [17]3 years ago
7 0

Answer: negative ions have <u>less</u> protons than electrons.

Explanation:

Anuta_ua [19.1K]3 years ago
3 0

Answer:

Less

Explanation: I took the test.

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The compound NaCl (salt) has the same properties as sodium (Na) and chlorine (CI) because it is made of both of those elements.
grin007 [14]

Answer:

False.

Explanation:

Hello.

In this case since sodium is a soft brilliant metal and chlorine is a green gas at normal conditions, they have totally different properties. Thus, since sodium chloride is also known as the table salt which is present as white crystals we can infer that the compound does not have the same properties, therefore it is false.

Regards.

3 0
3 years ago
1. Calculate the heat change associated with cooling a 350.0 g aluminum bar from
Amanda [17]

Answer:

14175 j heat released.

Explanation:

Given data:

Mass of aluminium = 350.0 g

Initial temperature = 70.0°C

Final temperature = 25.0°C

Specific heat capacity of Aluminium = 0.9 j/g.°C

Heat changed = ?

Solution:

Specific heat capacity:

It is the amount of heat required to raise the temperature of one gram of substance by one degree.

Formula:

Q = m.c. ΔT

Q = amount of heat absorbed or released

m = mass of given substance

c = specific heat capacity of substance

ΔT = change in temperature

Heat change:

ΔT = Final temperature - initial temperature

ΔT = 25.0°C - 70°C

ΔT = -45°C

Q = m.c. ΔT

Q = 350 g × 0.9 j/g.°C  × -45°C

Q = -14175 j

7 0
3 years ago
para una practica de laboratorio se requiere una disolucion de acido nitrico HNO3 al 3,5M,pero se dispone de un frasco de 1 litr
aliya0001 [1]

Answer:

hindi ko alam yan

PANO BA YAN

Explanation:

EWAN

5 0
3 years ago
Medicinal “ether" is produced when ethyl alcohol is treated with an acid. How many grams of
DochEvi [55]

Answer:

34.3 g

Explanation:

Step 1: Write the balanced equation

2 CH₃CH₂OH ⇒ CH₃CH₂OCH₂CH₃ + H₂O

Step 2: Calculate the moles corresponding to 50.0 g of CH₃CH₂OH

The molar mass of CH₃CH₂OH is 46.07 g/mol.

50.0 g × 1 mol/46.07 g = 1.09 mol

Step 3: Calculate the theoretical moles of CH₃CH₂OCH₂CH₃ produced

The molar ratio of CH₃CH₂OH to CH₃CH₂OCH₂CH₃ is 2:1. The moles of CH₃CH₂OCH₂CH₃ theoretically produced are 1/2 × 1.09 mol = 0.545 mol.

Step 4: Calculate the real moles of CH₃CH₂OCH₂CH₃ produced

The percent yield of the reaction is 85%.

0.545 mol × 85% = 0.463 mol

Step 5: Calculate the mass corresponding to 0.463 moles of CH₃CH₂OCH₂CH₃

The molar mass of CH₃CH₂OCH₂CH₃ is 74.12 g/mol.

0.463 mol × 74.12 g/mol = 34.3 g

6 0
3 years ago
Which process releases energy by breaking down glucose and other food molecules in the presence of oxygen?
FinnZ [79.3K]
Cellular respiration

is the process that releases energy by breaking down glucose and other food molecules in the presence of oxygen

5 0
3 years ago
Read 2 more answers
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