CHEMISTRY HIGH SCHOOL

Which of the following is not a true statement? 0.2 moles O 2 = 6 g
0.75 moles H 2CO 3 = 47 g
3.42 moles CO = 84.0 g

Answers

Answer 1
Answer:

Answer: 3.42 moles CO = 84.0g, is not true.

Explanation:

Moles is given by the formular; Mass / Molar Mass.

Therefore; 0.2 moles O2 = 6g is true  when we multiply 32g x 0.2 = 6g approximately.

 0.75 moles H2CO3 = 47g.

Molar formular for H2CO3 = 2 + 12 + 48 =62g.

If we multiply  62g (molar mass ) by 0.75moles, it gives us 47g approximately.

3.42 moles CO = 84g

molar mass of CO = 12 + 16 = 28g

Multiply 28g x 3.42 moles =  95.76g, which is not true.

Related Questions

Which substance is an Arrhenius acid?(1) LiF(aq) (3) Mg(OH)2(aq)(2) HBr(aq) (4) CH3CHO
Would the following errors increase, decrease, or have no effect on the calculated moles of gas collected in the experiment? Explain your answers in complete sentences.a) The measured mass of the magnesium was smaller than the true mass. b) The actual temperature of the hydrogen gas is less than room temperature.
Which of the following is a unit of density? = Mass / volumeA: liters per cubic gramB:cubic metersC:grams per cubic centimeterD:square meters
Do electrolytes contain ions?
The step that usually comes last in solving numeric problems is to ___

Calculate the mass in grams of 7.88 mol of RbMnO4

Answers

Molar mass RbMnO₄ = 204.40 g/mol

1 mole ---------- 204.40 g
7.88 mole ------ ?

mass = 7.88 * 204.40 / 1

mass = 1610.672 g

hope this helps!

A solution that is a 4 on pH scale is a

Answers

a pH scale runs from 1 to 14 with 7 being neutral.

1-6 has base like properties
8-14 has avid line properties

since this solution has a pH scale of 4.... the solution is basic
A solution that is 4 on pH scale is an acid. A pH scale is used to measure whether a solution is an acid or a base. the pH scale is numbered between 0 to 14. 7 is the neutral point of this scale. Any solution having a pH of 7 is a neutral solution. Acidity of a solution increases as the reading in the scale decreases from seven towards zero. The basic nature of the solution increases as the pH level of the solution increases from 7 towards 14. The acidic nature of a solution having pH value of 3 is ten times more acidic than a solution having pH value of 4. The same thing is same while comparing basic solutions as well.

The nucleus of an atom X contains 15 protons and 16 neutrons. a) Determine the number of electrons of this atom.​

Answers

Final answer:

The atom X has 15 electrons.

Explanation:

The number of electrons in an atom is equal to the number of protons. Since the atom X has 15 protons, it also has 15 electrons.

Learn more about number of electrons here:

brainly.com/question/34265383

#SPJ1

True or False: Since baking soda is a powder, all the substances it breaks down intoare also powders.

Answers

False; Sodium hydrogen carbonate (also known as sodium bicarbonate or bicarbonate of soda) has the chemical formula NaHCO3. When it is heated above about 80°C it begins to break down, forming sodium carbonate, water and carbon dioxide. This type of reaction is called a thermal decomposition.

When two continental plates of similardensities collide,
A. they remain level since densities in both plates are equal.
B. they both push back down into the mantle
C. one plate rides over the other one and forms a trench
D.they buckle upward and form mountains

Answers

Answer:

D. They buckle upward and form mountains.

Explanation:

When two plates (either oceanic or terrestrial) converge and they are of similar density then they will crash into each other and form mountains. A great example of this is when India crashed into the Asian continent and the Himalayas were formed.

Compare the arrangements of individual particles in solids, liquids, and gases

Answers

In a gas, the particles are evenly spaced out and not in any particular order. There is no regular arrangement of liquid next to one another. Solids are regularly arranged and closely packed.

What are solids, liquids, and gases?

They can be compressed a lot (particles are widely spaced). Matter exists in three different states: solid, liquid, and gas.

By examining the configuration of their particles, it is possible to understand why they have various qualities.

A solid is a condition of matter that, even when unconstrained, keeps its shape and density.

A liquid is a nearly incompressible fluid with a (almost) constant volume regardless of pressure that adapts to the shape of its container.

A sample of matter that assumes the shape of the container it is stored in and develops a consistent density inside the container is referred to as a gas.

Therefore, the arrangements of individual particles in solids, liquids, and gases is different.

Learn more about solids, liquids, and gases here:

brainly.com/question/12496112

#SPJ2
Solids - particles are very close together (highest density on the list)
Liquids - the particles slide past one another
Gases - particles bounce off of surroundings and the same particles of the gas
Other Questions
A solid is cooled to a very low temperature assuming the mass remains constant how if at all does this affect the density of the solid?
An 8.5 g ice cube is placed into 255g of water. Calculate the temperature change of water when the ice melts
Calculate the mass of 1.25 mol ammonium sulfide, (NH4)2S. *
A solution has a pOH of 8.7 so what is the pH of the solution? Is the solution acidic, basic, or neutral?