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4 years ago

The oil window is the Choose one:_______

Chemistry

1 answer:

Vesna [10]4 years ago

5 0

Answer:

A. relatively narrow range of temperatures in which oil can form: 90°C to 160°C.

Explanation:

The formation of oil begins in warm, shallow oceans that were present on the Earth millions of years ago. In these oceans, extremely small dead organic matter - classified as plankton falls to the floor of the ocean.

If temperatures of the kerogen are greater than 90°C but lower than 160°C, the kerogen is transformed into oil and natural gas. At temperatures higher than this, only natural gas (literally a gas that's a hydrocarbon) or graphite is formed. This temperature range is known as the "oil window".

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A certain first-order reaction is 27.5 percent complete in 8.90 min at 25°C. What is its rate constant?

jeyben [28]

Answer:

$k= 0.145min^{-1}$

Explanation:

Hello there!

In this case, according to the given information, it turns out necessary for us remember that the first-order kinetics is given by:

$ln(A/A_0)=-kt$

Whereas the 27.5% complete means A/Ao=0.275, and thus, we solve for the rate constant as follows:

$k=\frac{ln(A/A_0)}{-t}$

Then, we plug in the variables to obtain:

$k=\frac{ln(0.275)}{-8.90min}\\\\k= 0.145min^{-1}$

Regards!

4 0

3 years ago

Which of these groups includes organisms that are MOST closely related?

gregori [183]

The answer is D, species!

Hope this helps!

8 0

3 years ago

Read 2 more answers

As a team, determine the rules for naming binary ionic compounds that have a "special" transition metal in it when given the for

Lesechka [4]

Answer:

Metal name (charge in roman numerals) Non metal

for example Iron (III) chloride

Explanation:

The rule for naming special transition metal are as follows -

a) First name the transition metal

b) Now write the name of the non metal in the chemical formula.

c) Write the charge for the non metal.

d) If there is a polyatomic ion, write the Common Ion Table ,its formula and charge.

e) Based on the total charge on the non-metal or polyatomic ion, deduce the total charge on the transition metal

f) Write the charge of transition metal after the name of metal in Roman Numeral in parentheses

3 0

3 years ago

What is Ka for HCN(aq) H+(aq)+CN-(aq)?

snow_lady [41]

<h3> $\tt C.~Ka=\dfrac{[H^+][CN^-]}{[HCN]}$ </h3><h3>Further explanation </h3>

According to Arrhenius, acids are substances which, when dissolved in water, release Hions.

An HₓY acid in water will ionize:

HₓY (aq) ⇒ xH⁺ (aq) + Yˣ- (aq)

In general, the weak acid ionization reaction

HA (aq) ⇒ H⁺ (aq) + A⁻ (aq)

Ka's value

$\large {\boxed {\bold {Ka \: = \: \frac {[H ^ +] [A ^ -]} {[HA]}}}}$

So for HCN

HCN(aq)⇒H⁺(aq)+CN⁻(aq)

$\tt Ka=\dfrac{[H^+][CN^-]}{[HCN]}$

3 0

3 years ago

Read 2 more answers

_________ are elements of the same element that have a different _______________ due to a different number of _____________.

Andreas93 [3]

Answer: Isotopes

Explanation:

The atoms of a chemical element can exist in different types. These are called isotopes. They have the same number of protons (and electrons), but different numbers of neutrons. Different isotopes of the same element have different masses.

Hope this helps!

4 0

4 years ago