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
Debora [2.8K]
3 years ago
6

Magnesium oxide is a binary ionic compound. From the formula MgO, how do you know that Mg is the metal?

Chemistry
1 answer:
hammer [34]3 years ago
8 0

Answer:

See below.  

Step-by-step explanation:

<em>Method 1: </em>

You know that oxygen is a <em>non-metal. </em>

If the compound is ionic, the oxygen must be combined with a <em>metal</em>.

The Mg must be a metal.

<em>Method 2:</em>

In the formulas of ionic compounds, the positive ion (usually a metal) is written first.

You might be interested in
How do people start alcohol consumption​
Debora [2.8K]

Answer:

Explanation:Due to the mental pressure,

                       Due to peer pressure,

                      Lack of love and affection from the family members.

                      Influence from the T.V advertisement.

                       

6 0
2 years ago
What’s the best answer
In-s [12.5K]
C) is correct, because there are 2 carbons and 4 oxygens on both sides, making the equation balanced.
7 0
3 years ago
A 65.0-gram sample of some unknown metal at 100.0° C is added to 177.1 grams of water at 24.5° C. The temperature of the water r
jeka94
<span>B.) 0.900 J/ (°C × g). </span>
7 0
3 years ago
Heating 2.40 g of the oxide of metal X (molar mass of X = 55.9 g/mol) in carbon monoxide (CO) yields the pure metal and carbon d
Korolek [52]

Answer:The molecular formula of the oxide of metal be X_2O_3. The balanced equation for the reaction is given by:

X_2O_3+3CO\rightarrow 3CO_2+2X

Explanation:

Let the molecular formula of the oxide of metal be X_2O_y

X_2O_y+yCO\rightarrrow yCO_2+2X

Mass of metal product = 1.68 g

Moles of metal X =\frac{1.68 g}{55.9 g/mol}=0.03005 mol

1 mol of metal oxide produces 2 moles of metal X.

Then 0.03005 moles of metal X will be produced by:

\frac{1}{2}\times 0.03005 mol=0.01502 mol of metal oxide

Mass of 0.01502 mol of metal oxide = 2.40 g (given)

0.01502 mol\times (2\times 55.9 g/mol+y\times 16 g/mol)=2.40 g

y = 2.999 ≈ 3

The molecular formula of the oxide of metal be X_2O_3. The balanced equation for the reaction is given by:

X_2O_3+3CO\rightarrow 3CO_2+2X

8 0
3 years ago
A 40.2 g sample of a metal heated to 99.3°C is placed into a calorimeter containing 120 g of water at 21.8°C. The final temper
aliina [53]

Answer:

B) Iron (c=0.45 J/g°C)

Explanation:

Given that:-

Heat gain by water = Heat lost by metal

Thus,  

m_{water}\times C_{water}\times (T_f-T_i)=-m_{metal}\times C_{metal}\times (T_f-T_i)

Where, negative sign signifies heat loss

Or,  

m_{water}\times C_{water}\times (T_f-T_i)=m_{metal}\times C_{metal}\times (T_i-T_f)

For water:

Mass = 120 g

Initial temperature = 21.8 °C

Final temperature = 24.5 °C

Specific heat of water = 4.184 J/g°C

For metal:

Mass = 40.2 g

Initial temperature = 99.3 °C

Final temperature = 24.5 °C

Specific heat of metal = ?

So,  

120\times 4.184\times (24.5-21.8)=40.2\times C_{metal}\times (99.3-24.5)

40.2C_{metal}\left(99.3-24.5\right)=120\times \:2.7\times \:4.184

40.2C_{metal}\left(99.3-24.5\right)=1355.616

C_{metal}=0.45\ J/g^0C

<u>This value corresponds to iron. Thus answer is B.</u>

3 0
3 years ago
Other questions:
  • Early people observed their surroundings and relied on...
    10·2 answers
  • According to the kinetic theory _____.
    12·2 answers
  • Which example is most likely an inorganic compound? A. methane, which is made of carbon and hydrogen B. glucose, which is a suga
    15·2 answers
  • How to treat stream water for drinking
    6·1 answer
  • Please help me balance this equation!!!!<br> _KOH + _HBr → -KBr + _H2O
    6·2 answers
  • Whenever the same two elements form more than one
    6·1 answer
  • What is the total magnification if we using objective lens 4x and our eyepiece (ocular) lens is 10x
    13·1 answer
  • Please helppp final quiz helppp!!!!
    14·1 answer
  • Can someone help, please...?<br><br> I really can't understand this...
    14·1 answer
  • What part of the food chain is a lemming
    6·2 answers
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!