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Rzqust [24]
3 years ago
10

Please I'm begging for help. I'll give you ALL MY POINTS. JUST PLEASE HELP.

Chemistry
1 answer:
sergeinik [125]3 years ago
3 0

Answer:

Explanation:

A Chemical Equation tells the story of a chemical reaction. Reactants are the starting substances in the reaction while Products are the new substances that are formed. The large numbers in front of some of the formulas are called Coefficients. These numbers are used to Balance the equation because chemical reactions must obey the Law of Conservation of Matter. The number of atoms of each element on both sides of the equation must be Equal because matter  cannot be Created or Destroyed. When balancing equations, the only numbers that can be changed are Coefficients; remember that Subscripts must never be changed in order to balance an equation.

Q1) 4Al + 3O2 ---> 2Al2O3

Q2) C3H8 + 5O2 -----> 3CO2 + 4H20

Q3) P4 + 3O2 -----> 2P2O3

Q4) 2KNO3 -----> 2KNO2 + O2

Q5) 3O2 + CS2 ------> CO2 + 2SO2

Try the rest out and tell me did you understand it?

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What is the name of two areas where rivers leave rich, fertile soil?
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Answer:

1] flood planes

2] deltas

5 0
3 years ago
The annual production of sulfur dioxide from burning coal and fossil fuels, auto exhaust, and other sources is about 26 million
WARRIOR [948]

Answer is: quantity of sulfur is 13 tons.

Chemical reaction: S(s) + O₂(g) → SO₂(g).

From chemical reaction: n(S) : n(SO₂) = 1 : 1.

n(S) = n(SO₂); amount of substance.

m(S) ÷ M(S) = m(SO₂) : M(SO₂).

m(S) : 32 g/mol = 26 t : 64 g/mol.

m(S) = (32 g/mol · 26 t) ÷ 64 g/mol.

m(S) = 13 t = 13000 kg; mass of sulfur.


3 0
4 years ago
Read 2 more answers
The pressure of a gas is 100.0 kPa and its volume is 500.0 mL. If the volume increases to 1,000.0 mL, what is the new pressure o
elena-14-01-66 [18.8K]

Answer:

P_2=50kPa

Explanation:

Hello,

In this case, we can apply the Boyle's law in order to understand the pressure-volume relationship as an inversely proportional relationship relating the initial and the final volume:

P_1V_1=P_2V_2

Next, we compute the final pressure P2:

P_2=\frac{P_1V_1}{V_2}=\frac{100.00kPa*500.0mL}{1000.0mL} \\\\P_2=50kPa

Thus we validate, the higher the volume the lower the pressure.

Best regards.

3 0
3 years ago
What would be the mass of a 33.5dm3 sample of O2 at STP?
liraira [26]

Answer:

• One mole of oxygen is equivalent to 16 grams.

→ But at STP, 22.4 dm³ are occupied by 1 mole.

{ \tt{22.4 \:  {dm}^{3}   \: \dashrightarrow \: 16 \: grams}} \\  { \tt{33.5 \:  {dm}^{3}  \:  \dashrightarrow \: ( \frac{33.5 \times 16}{22.4} ) \: grams}} \\  \\  \dashrightarrow \: { \boxed{ \tt{23.94 \: g \approx \: 24 \: grams}}}

7 0
3 years ago
You shine a flashlight into a glass of apple juice. Some of the light bounces off the liquid. Some of it passes through it. Whic
Vilka [71]

Answer:

2. Translucent

4. Reflection

Explanation:

The terms translucent describes the nature of the juice and reflection perfectly fits the property of the light.

A translucent substance is one that partially allows light to pass through it. Since it is said that some of the light bounced back and some passed through, this is translucent.

Also, the light bouncing back is an indicator of reflection. Reflection is a property of light where it bounces back a surface.

7 0
3 years ago
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