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
ICE Princess25 [194]
3 years ago
15

a. Define Valency. b. Write the symbol and valency of the following : (i) Oxygen (ii) potassium 7. a. Magnesium burns in Oxygen

to form Magnesium Oxide. a) Name the reactants b) Name the Products c) Write the word equation for the above reaction.
Physics
2 answers:
sweet-ann [11.9K]3 years ago
6 0

Answer:

Oxygen-Symbol-O Potassium Symbol-K

34kurt3 years ago
6 0
<h3>⚘ <u>Your</u><u> </u><u>Answers</u><u>:</u></h3>

<u>A</u><u>)</u> Valency is the combining capacity of any element. Valence electrons refers to the electrons found in the outermost shell of the atom of the element.

<u>B</u><u>)</u> Symbol and valency:

  1. Oxygen(O) = (At. no. 8) = -2(Valency)
  2. Potassium(K) = (At. no. = 19) = +1(Valency)

<u>C</u><u>)</u> The reaction would be:

\large{ \boxed{ \rm{2Mg + O_2  \longrightarrow \: 2MgO}}}

  • <u>Reactants</u> = Magnesium and Oxygen
  • <u>Products</u> = Magnesium oxide
  • Word equation:

\large{ \boxed{ \rm{Magnesium + Oxygen  \longrightarrow Magnesium oxide.}}}

<u>━━━━━━━━━━━━━━━━━━━━</u>

You might be interested in
An investigation that has been done by more than one scientist with similar findings has been What?
yarga [219]

An investigation that has been done by more than one scientist with similar findings has been replicated.

<h3>What does replication in science mean?</h3>

The expression 'replication in science' makes reference to the same experimental result through different hypothesis testing procedures, which is fundamental to reinforcing a scientific idea.

In conclusion, an investigation that has been done by more than one scientist with similar findings has been replicated.

Learn more about replication in science here:

brainly.com/question/24382552

#SPJ1

5 0
2 years ago
What do you think the value will be for the car's distance
lions [1.4K]

Answer:

student A

Explanation:

It's going the same value

8 0
4 years ago
An insulated Thermos contains 140 cm3 of hot coffee at 85.0°C. You put in a 15.0 g ice cube at its melting point to cool the cof
Pavel [41]

Answer:

T = 69^o C

Explanation:

Here at thermal equilibrium we can say that thermal energy given by Hot coffee is equal to the thermal energy absorbed by ice cubes

So here we have

Q_{ice} = Q_{coffee}

now since ice cubes are added into coffee when it is at melting temperature

So here we can say that final temperature of coffee is T degree C

Now we have

m_1L + m_1c_1\Delta T_1 = m_2c_2\Delta T_2

here we have

m_1 = 15 gram

L = 333 kJ/kg = 333 J/g[/tex]

c_1 = c_2 = 4186 J/kg C = 4.186 J/g C

\Delta T_1 = T - 0

\Delta T_2 = 85 - T

now we have

15(333) + 15(4.186)(T - 0) = 140(4.186)(85 - T)

4995 + 62.79T = 49813.4 - 586.04T

648.83 T = 44818.4

T = 69^o C

6 0
3 years ago
Divers in acapulco, mexico, dive headfirst at 8 feet per second from the top of a cliff 87 feet above the pacific ocean. during
xxMikexx [17]
Depends on the wieght of his genitals.
8 0
3 years ago
How coal power plants produce electrical energy to power our homes
balandron [24]
Coal plants use a boiler to produce steam.
3 0
3 years ago
Other questions:
  • What will Bronco's acceleration be as he jumps from an airplane and is in free fall with air resistance of 400N?
    7·1 answer
  • A boulder on top of a cliff has a potential energy of 12400J. How high above is the boulder?
    13·1 answer
  • You walk 60m east and then 20m at 20 degrees south of west. What is your displacement?
    7·1 answer
  • A 2 kg ball travelling West at 6 m/s collides with a 3 kg ball travelling South at 4 m/s stick together and move off with a comm
    15·1 answer
  • This question is typical on some driver license exams: A car moving at 43 km/h skids 17 m with locked brakes. How far will the c
    12·1 answer
  • You toss a coin straight upward in a train which is moving at a constant velocity. If the air friction is negligible, the coin w
    13·1 answer
  • What is the importance of antacid in human health​
    10·2 answers
  • To understand the photoelectric effect physiciests should view light as having what type of properties?
    5·1 answer
  • A baseball is launched horizontally from a height of 1.8 m. The baseball travels 0.5 m before hitting the ground.
    7·2 answers
  • Explain how geothermal energy and tidal energy can be used effectively?
    15·2 answers
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!