Hydrogen, when combined with oxygen in a chemical reaction, forms water. This is an example of which type of chemical reaction? I think its single displacement but I am not sure.

Answers

Answer 1

Answer: it's synthesis. hope this helps you out.

Answer 2

Answer:
the answer is it's synthesis

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A tire at 21°C has a pressure of 0.82 atm. Its temperature decreases to –3.5°C. If there is no volume change in the tire, what is the pressure after the temperature change?

Answers

Using ideal gas equation, PV = nRT, and since there is no volume change and amount change, the equation is now P = kT, where k =nR/V. Temperature must be in kelvin From the given, k = (0.82)/ (21 + 273) = 2.78 x 10^-3 Substituting T = -3.5+273, P = 0.75 atm

it would be 0.75 atm

What are three possible dangers when dealing with acids with low pH and bases with high pH

Answers

Skin corrosion, can cause blindness, and poison

Martin uses 5/8 of a gallon of paint to cover4/5 of a wall. What is the unit rate at which Martin paints in walls per gallon

Answers

Answer:

Unit rate at which Martin paints in walls per gallon is $(32)/(25) wall/gallon$ .

Explanation:

Rate is defined as ratio between two quantities with different units.

Gallons of paint used by Martin = $(5)/(8)$ gallons

Portion of wall Martin wishes to pint = $(4)/(5)$ wall

Rate at which Martin paints the wall:

$Rate=\frac{\text{Portion of wall covered}}{\text{Paint used}}$

$Rate=((4)/(5) wall)/((5)/(8) gallon)=(32)/(25) wall/gallon$

Unit rate at which Martin paints in walls per gallon is $(32)/(25) wall/gallon$ .

If an atom has an electron configuration of 2.8.2, what will it be most likely to bond with? A. One fluorine atom B. Two chlorine atoms C. None of these D. One arsenic atom

Answers

Answer:

B. Two chlorine atoms

Explanation:

This electronic configuration shows that the given atom is magnesium.

Electronic configuration of magnesium:

Mg¹² = 1s² 2s² 2p⁶ 3s²

There are two valance electrons of magnesium that's why it would react with two atoms of chlorine. Chlorine is present in seventeen group. It has seven valance electrons. It required just one electron to get complete octet. While magnesium needed to lose two electrons to get complete octet. That's why two chlorine atoms bonded with one magnesium atom. Thus both would get complete octet.

Mg + Cl₂ → MgCl₂

Please answer me ASAPA technique that uses a porous barrier (separation with pores) to separate heterogeneous mixtures is _______.

a. distillation

b. chromatography

c. filtration

d. crystallization