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Debora [2.8K]
3 years ago
13

What are the 3 acid theories

Chemistry
1 answer:
BaLLatris [955]3 years ago
6 0
The Arrhenius Theory

The Brönsted-Lowry Theory

The Lewis Theory

(let me know if needed explanation)
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The standard unit for measuring mass is the gram.<br> a. True<br> b. False
Ann [662]
b. False is the correct answer.

The standard unit for measuring mass is kilogram (kg), which is equal to 10^3 g. In chemistry, we use grams for measuring mass because we just usually use small amounts of stuff, so using grams is more sensible.

Hope this helps~
5 0
3 years ago
Read 2 more answers
An unknown substance has a mass of 19.1 g. the temperature of the substance increases by 13.9 degrees celsius when 62.4 j of hea
sweet-ann [11.9K]
Heat=mass* change in temperature * specific heat
specific heat= 62.4/(.0191*13.9)
=235.037 J/kgK
8 0
3 years ago
The ionic compounds NaClNaCl and MgSMgS are represented by the diagrams above. Which statement correctly identifies diagram 1 an
Oksana_A [137]

Answer:check explanation

Explanation:

No diagram is given above but to determine the value of melting point we need to understand the fact that NaCl has a lower melting point than MgS.

Reasons are; (1) sodium ion (+1) in the first group of the periodic table is characterized by its softness and low melting point and, (2). Is that it has a lower melting point than MgS because the COULUMBIC ATTRACTIONS between its singly charged sodium ions(+1) and the chlorine ions(-1) are weaker than those between the ions in MgS.

7 0
3 years ago
If 75 g of oxygen react how many grams of aluminum are required
daser333 [38]

Answer:

84.24 g

Explanation:

Given data:

Mass of oxygen = 75 g

Mass of Al required to react = ?

Solution:

Chemical equation:

4Al + 3O₂     →   2Al₂O₃

Number of moles of oxygen:

Number of moles = mass/ molar mass

Number of moles = 75 g/ 32 g/mol

Number of moles = 2.34 mol

Now we will compare the moles of oxygen with Al.

                         O₂         :          Al

                          3          :             4

                       2.34        :         4/3×2.34 = 3.12 mol

Mass of Al required:

Mass = number of moles × molar mass

Mass = 3.12 mol × 27 g/mol

Mass = 84.24 g

8 0
3 years ago
Calculate the density of chlorine gas in g/l, at stp.
vichka [17]
The Answer would be e: 3.2 g/L 

<span>At STP : p = 1 atm and T = 273.15 K 
molar mass Cl2 = 70.906 g/mol 

d = molar mass x p/RT = 70.906 x 1 atm / 0.08206 x 273.15=3.16 g/L</span>
8 0
4 years ago
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