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
AURORKA [14]
3 years ago
8

I need help with balancing these equations i will give brainliest and points to whoever helps! Chemistry work

Chemistry
1 answer:
Lynna [10]3 years ago
6 0

Answer:

Explanation:

2)   2Mg + O2-> 2MgO

3)  CaO + 2HCl -> CaCl2 +H2O

4) 2P +3Cl2 -> 2PCl3

5) 2SO2+ O2 -> 2SO3

6) 2CO +O2 -> 2CO2

7) C2H4 +3O2 -> 2CO2 +2H2O

8) Fe2O3 + 3CO -> 2Fe + 3CO2

9) Na2CO3 + 2HCl -> 2NaCl +CO2 +H2O

10) 2KMnO4 + 16HCl -> 2MnCl2 + 2KCl +_5_Cl2 + 8H2O

You might be interested in
What is the mole fraction of lif in an aqueous solution that contains 39.4% lif (weight/weight %)?
Nookie1986 [14]
The solution contains 39.4% of LiF. Assume that the solution is 100ml. The molar mass of LiF is 25.939, the amount of LiF in mole would be: 100ml * 1g/ml * 39.4%/ 25.939g/mol= 1.52 mol LiF
Then the mass of the water would be: 100gram- 39.4g= 60.6g
If the molar mass of water is 18.015 the mole of the water would be: 60.6g/ 18.015g/mol= 3.36 mol
.
The mole fraction would be:1.52 mol/ 1.52+3.36= 0.339
5 0
3 years ago
Consider the slightly soluble base bs(oh)2. if the molar solubility of the base is 1.82 ⋅ 10 − 2 , what concentration of hydroxi
Blababa [14]

Answer:

Explanation to the following:

3 0
2 years ago
Which biome has leaves that change color and fall off as winter approaches?
Galina-37 [17]

Answer:

Option (A)

Explanation:

The temperate forest usually covers the tropical and the taiga region. The trees in this forest region experience all the four seasons namely summer, autumn, winter and spring. It comprises approximately 25% of the total forest-covered region on earth. The leaves of these trees change color during the autumn season, which eventually falls off during the winter season, and again, new leaves grow back during the spring season. This enables the plants to survive and go through the cold temperature in the winter.

Thus, the correct answer is option (A).

7 0
3 years ago
Read 2 more answers
How many joules of heat are needed to raise the temperature of 47.5 g of aluminum from 21°C to 94°C , if the specific heat of al
Montano1993 [528]

Answer:

3120.75J

Explanation:

So, we have the formula q = mc\Delta t. For this example, q is the heat energy in Joules, m is the mass in grams, c is the specific heat capacity in \frac{J}{{g\°C}}, and \Deltat is the change in temperature. In this case, m = 47.5g, c = 0.9  \frac{J}{{g\°C}}, and \Deltat  = 94-21 = 73°C. Plugging in the values, we get the joules of heat required to raise 47.5g of Al from 21°C to 94°C which is stated above. You can double check my answer but that should be it. An important thing to be aware of are the units. Sometimes, the heat capacity may not be \frac{J}{{g\°C}}. I may be in Kelvin or something. Anyways, hope this helps.

5 0
4 years ago
The amount of calcium hydroxide needed to react completely with a 100.0 g of nitric acid
Ierofanga [76]

Answer:

The answer to your question is 58.7 g of Ca(OH)₂

Explanation:

Data

mass of Ca(OH)₂ = ?

mass of HNO₃ = 100 g

Process

1.- Write the balanced chemical reaction

              Ca(OH)₂ + 2HNO₃   ⇒   Ca(NO₃)₂  +  2H₂O

2.- Calculate the molar mass of the reactants

Ca(OH)₂  = 40 + 32 + 2 = 74 g

HNO₃ = 1 + 14 + 48 = 63 g

3.- Use proportions to calculate the mass of Ca(OH)₂

                  74 g of Ca(OH)₂ ----------------- 2(63) g of HNO₃

                    x                        ----------------- 100 g of HNO₃

                          x = (100 x 74) / 2(63)

                          x = 7400 / 126

                         x = 58.7 g

3 0
4 years ago
Other questions:
  • What are the dark areas on the surface of the earth
    13·2 answers
  • What is the relationship between temperature and kinetic energy?
    13·1 answer
  • Never have what near a heating device ?
    12·1 answer
  • Two protons and two neutrons are released as a result of this reaction. mc017-1.jpgRn mc017-2.jpgPo + ? Which particle is releas
    13·2 answers
  • Which tools do meteorologists use to help create weather forecasts? Choose ONE answer:
    7·2 answers
  • The blue underlined part of the chemical formula above represents a(n) ______________.
    5·1 answer
  • The modern periodic table is organized by?
    9·2 answers
  • In the following description of Fe, some of the properties are physical and some are chemical. Identify which of the properties
    6·1 answer
  • Tipo de enlace en los compuestos. Compuesto /Electronegatividad Elemento 1/Electronegatividad Elemento 2/ Diferencia de electron
    9·1 answer
  • What aspect of water makes it favorable to use in steam distillation?.
    15·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!