CHEMISTRY HIGH SCHOOL

In Organic Chemistry, what does the letter "X" represent?a. a hydrogen
c. a carbon
b. a halogen
d. an alkane

Answers

Answer 1
Answer: X represent halogen atom bonded to a saturated c atom So the answer is letter b

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Write the balanced molecular equation and net ionic equation for the neutralization reaction between hydrochloric acid and strontium hydroxide. Include the phase of each species.

Answers

Answer:

the net ionic equation is H+(aq) + OH-(aq)----->H2O(l)

Explanation:

In conclusion to the earlier solution, 2H+(aq) + 2OH-(aq)----->2H2O(l) can be broken down because they all have the same coefficient. So divide both sides by 2.

The net ionic equation will be H+(aq) + OH-(aq)----->H2O(l)

Final answer:

The balanced molecular equation for the neutralization reaction between Hydrochloric acid (HCl) and Strontium hydroxide (Sr(OH)2) is HCl(aq) + Sr(OH)2(aq) -> SrCl2(aq) + 2H2O(l). Its net ionic equation is 2H+(aq) + 2OH-(aq) -> 2H2O(l). Spectator ions are eliminated during the formulation of the net ionic equation.

Explanation:

A neutralization reaction between hydrochloric acid and strontium hydroxide can be represented by the balanced molecular equation: HCl(aq) + Sr(OH)2(aq) -> SrCl2(aq) + 2H2O(l). Breaking it down into the total ionic equation we will have: H+(aq) + Cl-(aq) + Sr2+(aq) + 2OH-(aq) -> Sr2+(aq) + 2Cl-(aq) + 2H2O(l). This can be simplified by removing the spectator ions to obtain the net ionic equation: 2H+(aq) + 2OH-(aq) -> 2H2O(l). This aligns with the principle that in a neutralization reaction, an acid reacts with a base to form water and a salt.

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Doubling the number of particles of gas in an inflated tire will double the pressure of the gas in the tire.a. True
b. False

Answers

True - more particles will be able to hit off the tire wall, therefore higher pressure
True, I got it right on the test

Which intrusive feature may start as a sill but, as more magma builds, it pushes upward like a lens

Answers

An intrusive feature that starts as a sill, but build up with magma into a lens-like structure is a batholith. A batholith is composed of igneous rocks due to the hardened magma from the Earth's crust. The opposite of sill, dike, builds up to form a laccolith, another intrusive feature with a mushroom-like structure.

At STP, which list of elements contains a solid, a liquid, and a gas?(1) Hf, Hg, He (3) Ba, Br2, B
(2) Cr, Cl2, C (4) Se, Sn, Sr

Answers

Periodic table contain element of various states like solid, liquid and gases. Thus the that list of elements contains a solid, a liquid, and a gas is HF, Hg, He. Hence option A is correct option.

What is periodic table?

Periodic table is a table in which we find elements with properties like metals, non metals, and metalloids

STP means standard temperature and pressure where temperature is 273.15 K and pressure is 1 bar. It is known that only bromine (Br) and mercury (Hg) are in liquid form at STP. Whereas noble gases like He, Ne, Ar  are gases in nature.

HF - solid, Hg - liquid, and He - gas

Ba - solid,  - liquid, and B - solid

Cr - solid,  - gas, and C - solid

Se - solid, Sn - solid, and Sr - solid

Thus, we can conclude that list of elements contains a solid, a liquid, and a gas is HF, Hg, He. Hence option A is correct option

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Answer: Option (1) is the correct answer.

Explanation:

STP means standard temperature and pressure where temperature is 273.15 K and pressure is 1 bar or 0.98 atm.

It is known that only bromine (Br) and mercury (Hg) are in liquid form at STP. Whereas noble gases like He, Ne, Ar etc are gases in nature.

Hence, given elements are differentiated as follows.

HF - solid, Hg - liquid, and He - gas

Ba - solid, Br_(2) - liquid, and B - solid

Cr - solid, Br_(2) - gas, and C - solid

Se - solid, Sn - solid, and Sr - solid

Thus, we can conclude that list of elements contains a solid, a liquid, and a gas is HF, Hg, He.

What is h2o? How is it build?

Answers

This is water. It is made from 2 elements: hydrogen  and oxygen.

The density of aluminum is 2.70 g/cm3. What is the mass of 235 cm3 of aluminum? 634.5 g
635 g
635 g/cm3
634.5 ml

Answers

Answer:

JUST B

Explanation:

Final answer:

The mass of 235 cm³ of aluminum, which has a density of 2.70 g/cm³, is calculated to be 634.5 g using the formula Mass = Density × Volume.

Explanation:

To find the mass of a given volume of a substance, you can use the formula: Mass = Density × Volume. In this case, the density of aluminum is given as 2.70 g/cm³ and you need to find the mass of 235 cm³ of aluminum.

Substitute the given values into the formula:

Mass = 2.70 g/cm³ × 235 cm³ = 634.5 g

Therefore, the mass of 235 cm³ of aluminum is 634.5 g.

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