CHEMISTRY MIDDLE SCHOOL

This reaction is an explosive reaction of a strong acid combining with a strong base.H2SO4 + 2NaOH → 2H2O + Na2SO4

Which compounds are the reactants and which are the products?

A.
reactants: H2SO4 + 2NaOH
products: 2H2O + Na2SO4

B.
reactants: 2NaOH + Na2SO4
products: H2SO4 + 2H2O

C.
reactants: 2H2O + Na2SO4
products: H2SO4 + 2NaOH

D.
reactants: H2SO4 + 2H2O
products: 2NaOH + Na2SO4

Answers

Answer 1
Answer: A) reactants: H2SO4 + 2NaOH and products: 2H2O + Na2SO4
The reactants are found on the left side of the equation, before the arrow.
The products are found on the right side of the equation, after the arrow.
Answer 2
Answer:

Answer:

A. Reactants: H2SO4 + 2NaOH

products: 2H2O + Na2SO4

Explanation:

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You start with an equimolar mixture of the gases SO₂ and O₂ in a container. The SO₂ and O₂ react to completion to form SO₃. If the temperature after the reaction is 25°C and the pressure in the container is 1.65 atm, what is the density of the product gas mixture? Assume ideal behavior.

Answers

The density of the product gas mixture is 5.39 g/L

Explanation:

Given:

Temperature after the reaction = 25^0C

Pressure in the container = 1.65 atm

The ideal gas equation PV = nRT

To find: Density of the product gas mixture

Step 1:

Molarity (M) = P/(RT)

\[M=(P)/(R T)\]$M=\frac{1.65 \mathrm{atm}}{\left(0.08206 (L \cdot a t m)/(m o l . K)\right)(298.15 K)}$

M = 0.0674 mol/L

Step 2:

The product of the given reaction is SO_3. Its molar mass is

1S x 32.066 g/mol = 32.066 g/mol

3O x 16 g/mol = 48 g/mol

Adding both we get 80.066 g/mol

Therefore the density of the product gas mixture is 0.0674 \frac{{mol}}{L} * \frac{80.066 g}{1 \mathrm{mol}}

= 5.39 g/L

Sound _____..Travels in longitudinal waves

.Can travel through a vacuum

.Travels most slowly through a gas

.Speeds up when temperature is increased

.Is caused by vibration

Answers

the answer is the first one that say Travels in longitudinal waves
It travels in longitudinal waves.

Which system consists of nerves that initiate communication?

Answers

Peripheral nervous system consists of nerves that help in communication among different parts of the body. In nervous system nerves are used to take and deliver messages. These messages are taken from different parts of the body to brain and these nerves are spreading all over the body.

The main actor in the neurological system's action is the nerve cell, or neuron. It transmits information chemically and electronically. Information is transferred within the neuron through the movement of an electrical charge, or impulse. It is the peripheral nervous system that initiates communication.

The nerves that emerge from the brain and spinal cord make up the peripheral nervous system. The CNS and the body components are connected through a network of nerves. All of the body's parts are connected by nerves that emerge from the spinal cord and make up the peripheral nervous system.

The PNS's primary functions are voluntary actions including eating, walking, and making facial expressions.

To know more about peripheral nervous system, visit;

brainly.com/question/14312818

#SPJ6

A hypothesis is a possible explanation or answer to a question. Hypotheses should be testable. Which of the following sentences is the best hypothesis?A.
If a person falls asleep, then their heart rate will decrease.
B.
If a pillbug becomes frightened, then it will roll up into a ball.
C.
It is better to live in a city than in the country.
D.
Why are plant leaves green?

Answers

i am caught between A. and B. but, my brain says its A.
The answer is A)

This hypothesis could be tested because it can be measured. The experiment would need a dependent and independent variable, constant and control variable.

How are heterogeneous and homogeneous mixtures separated?

Answers

Explanation:

Homogeneous mixture is separated using two stage separation process: mobile stage and stationary stage. The mobile phase are absorbent such as water, chemicals while the stationary stage is the column used for the separation process. The integral method of separation of homogeneous mixtures is called chromatography (analytical or preparative). Other method of separation of homogeneous mixtures is called distillation and it is based on the various boiling points of the component of mixture.

While heterogeneous mixtures are separated based the properties of the components. One method of separation of solids suspended in liquids is simple filtration.

A 500 gram piece of metal has a volume of 2.75cm3 what is the density

Answers

Answer: 181.82\ g/cm^3

Explanation:

Given that the volume of a piece of metal = 2.75\ cm^3

Mass of piece of metal= 500 g

Formula to calculate the density is given by :-

\text{Density}=\frac{\text{Mass}}{\text{Volume}}

Then, the density of piece of metal is given by :-

\text{Density of piece of metal}=(500)/(2.75)\n\n\Rightarrow\ \text{Density}=181.818181818\approx181.82\ g/cm^3  [Rounded to the nearest two decimal places.]

Hence, its density of piece of metal= 181.82\ g/cm^3
density is mass / volume so it is 500 / 2.75=181.82 g/cm3
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