Prove the following:V=U + AT<br>

If today is October 22nd and we view a new moon, on what date will we observe the next first quarter?

Sophie [7]

Answer:

The answer is C

Explanation:

7 0

3 years ago

Write an equilibrium expression for each chemical equation involving one or more solid or liquid reactants or products. Part A:

madam [21]

Answer:

Part A: $Kc=\frac{C.D}{A}$

Part B: $Kc=\frac{C.D}{A}$

Part C: $Kc=\frac{C^{2} }{B}$

Part D: $Kc=\frac{C^{2} }{B}$

Explanation:

<em>Write an equilibrium expression for each chemical equation involving one or more solid or liquid reactants or products.</em>

The equilibrium constant (Kc) is equal to the product of the concentration of the products raised to their stoichiometric coefficients divided by the product of the concentration of the reactants raised to their stoichiometric coefficients. It only includes gases and aqueous species (not liquids or solids).

Part A: HCHO₂(aq) + H₂O(l) ⇌ H₃O⁺(aq) + CHO₂⁻(aq)

Use A for [HCHO₂], B for [H₂O], C for [H₃O⁺], D for [CHO₂⁻].

$Kc=\frac{C.D}{A}$

PART B: CO₃²⁻(aq) + H₂O(l) ⇌ HCO₃⁻(aq) + OH⁻(aq)

Use A for [CO₃²⁻], B for [H₂O], C for [HCO₃⁻], D for [OH⁻].

$Kc=\frac{C.D}{A}$

PART C: 2 C(s) + O₂(g) ⇌ 2 CO(g)

Use A for [C], B for [O₂], C for [CO].

$Kc=\frac{C^{2} }{B}$

PART D: C(s) + CO₂(g) ⇌ 2 CO(g)

Use A for [C], B for [CO₂], C for [CO].

$Kc=\frac{C^{2} }{B}$

7 0

3 years ago

What statement is true about the eight elements on the periodic table termed metalloids?

valina [46]

Answer:

They have properties of both metals and nonmetals

Explanation:

Elements in the periodic table may be divided into Metals, non-metals, and metalloids.
Metals are the elements that react by losing electrons to form stable positively charged ions known as cations. Examples are group 1, 2, and 3 elements together with transition elements.
Non-metals are those elements that react by gaining electrons to form stable negatively charged ions called anions. Examples include oxygen, carbon, sulfur, etc.
Metalloids, on the other hand, are elements that have both metallic and non-metallic properties.
Metalloids occur between metals and non-metals in the periodic table. Examples include Boron and silicon among others.

6 0

3 years ago

How does Silicon shape our technological reality

Vladimir79 [104]

Silicons are used in our day to day technology products.It is used used to micro-chips and motherboards and other components on nano-technologies.

3 0

3 years ago

Part A What are plate boundaries at which lithospheric plates that a) move toward each other, b) move past each other, and c) mo

Alex787 [66]

Answer:

a. Convergent boundary

b. Transform boundary

c. Divergent boundary

Explanation:

Convergent boundary are boundary where tectonic plates collide with each other. This kind of boundary might involve a collision between continental and oceanic plates, continental and continental plates and oceanic and oceanic plates. Generally, convergent boundary are regions for mountainous structures . Example of mountain formed through convergence are mountain Everest and Himalayas .

Transform boundary are boundary where tectonic plates move past each other . This kind of boundary is responsible for the creation of Extensive Fault like the San Andrea Fault.

Divergent boundary are boundary where tectonic plates move away from each other. The diverging movements brings about oceanic ridges. The mid oceanic ridges is where magma rises to the surface to form a new crust. The up welling of this magma causes further separation of this plates.

The picture above illustrate convergent, divergent and transform boundary.

4 0

4 years ago

Prove the following:V=U + AT​

Prove the following:V=U + AT