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3 years ago

Eutrophication is when a lake eventually become _______.

Chemistry

1 answer:

Nitella [24]3 years ago

4 0

Over flowing with BOD, which drags down the O2 levels.

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A student has four resistors. Each resistor has a resistance of 100 ohms.

ValentinkaMS [17]

Answer:

The minimum resistance is 25 ohms.

Explanation:

Resistance of each resistor is 100 ohms. When resistors are connected in parallel, the equivalent resistance is lowest. For parallel combination, the equivalent resistance is given by :

$\dfrac{1}{R}=\dfrac{1}{R_1}+\dfrac{1}{R_2}+....$

Here, all resistors are 100 ohms. So,

$\dfrac{1}{R}=\dfrac{1}{100}+\dfrac{1}{100}+\dfrac{1}{100}+\dfrac{1}{100}\\\\R=25\ \Omega$

So, the minimum resistance is 25 ohms.

7 0

3 years ago

. What is the conjugate base of HCO3–?<br> a) OH– b) H2CO3 c) CO32– d) HCO3+ e) H3CO3+

Lisa [10]

Answer:

b) H2CO3

Explanation:

The conjugate acid of HCO3– is Carbonic acid (H2CO3).

3 0

3 years ago

If salt (5. 99 × 10–6 mol) is dissolved in 1. 50 × 10–2 L of water, which expression can be used to find the molarity of the res

Alexus [3.1K]

Molarity can be defined as the moles of solute in a liter of solution. The molarity of the salt solution is $\rm \bold{3.99\;\times\;10^{-4}\;M}$ .

<h3>What is the relation between moles and volume?</h3>

The moles are the mass of substance with respect to the molar mass. The moles and volume relationship can be expressed in terms of molarity.

The molarity can be expressed as:

$\rm Molarity=\dfrac{Moles}{Volume}$

The given solution has,

Moles of salt = $\rm 5. 99\;\times\; 10^-^6$

The volume of solution = $\rm 1.50\;\times\;10^-^2$ L.

Substituting the values for molarity as:

$\rm Molarity=\dfrac{5.99\;\times\;10^{-6}}{1.50\;\times\;10^-^2\;L}\\ Molarity=3.99\;\times\;10^{-4}\;M$

The molarity of the solution is $\rm \bold{3.99\;\times\;10^{-4}\;M}$ . Thus, option C is correct.

Learn more about molarity, here:

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4 0

3 years ago

What's the answer to this question? pls find it asap now

igomit [66]

Answer:
c

explanation

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2 years ago

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torisob [31]

Answer:

the mirror is an reflective object when light hits the mirror a small amount is refracted and converted to Thermal energy while most of the light waves are reflected( last one most likely wrong?)

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3 years ago

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