certain solution has [OH-] = 4 x 10-3. Calculate the concentration of [H3O+] and the pH of the solution

Answers

Answer 1

Answer: Kw = 1 x 10⁻¹⁴

Kw = [ H₃O⁺] [ OH⁻]

1 x 10⁻¹⁴ = [ H₃O⁺] * 4 x 10⁻³

[H₃O⁺] = 1 x 10⁻¹⁴ / 4 x 10⁻³

[H₃O⁺] = 2.5 x 10⁻¹² M

hope this helps!

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How does the Atomic theory
impact our understanding of the universe?

Answers

Answer:Atomic theory established that all matter is made of tiny particles, a discovery that led to amazing scientific breakthroughs in areas from modern chemistry to nuclear energy.

Explanation:Atomic theory is the scientific theory that matter is composed of particles called atoms. Atomic theory traces its origins to an ancient philosophical tradition known as atomism.

A student wants to do scientific research on how nuclear fusion can be usedas a power source on Earth. What type of scientist does the student want to
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Answers

Answer:

A physicist

Explanation:

A physicist is one who deals with matter energy and how they are related

The color and temperature of stars are closely related. Which color star is the hottest?Use the drop-down menus to identify which of these stars is the smallest, which is the largest, and which is in the middle.

Answers

Answer:

blue star is the hottest of all

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Blue stars are blue because of the temperature of their surface and they are so hot because they are much more massive than cooler stars like our sun.

Why are the atomic masses of elements usually decimal numbers? Provide an answer using 3 – 4 sentences in your own words.

Answers

Explanation: An element does not exist alone in the nature. It exist in the form of isotopes of its own. Atomic mass of that element is the average atomic masses of the isotopes.

Average atomic mass of the element is defined as the sum of atomic masses of isotopes each multiplied with their respective natural fractional abundance.

Mathematically,

$\text{Average atomic mass}=\sum_(i=1)^n\text{(atomic mass of an isotopes)}_i* \text {(fractional abundance)}_i$

This is the reason, why an element does not have a whole number atomic mass, but exist in decimal numbers.

The atomic masses of elements are usually written in decimal numbers because they are non-terminating. The numbers usually are rounded to the nearest thousandths place. The atomic masses are more exact in decimal numbers.

A client is to receive 150 mL of intravenous solution over the next hour using a microdrip delivery system. How much fluid would the client receive in 1 minute?

Answers

Answer:

150ml .........60 minute

x ........... 1 minute

x = 150ml× 1 minute / 60 minute

x = 2.5ml

Explanation:

it is known that the client receives 150ml of the solution for over an hour.convert the hour into minutes,then we do not know how much liquid a client receives in a minute. we cross multiple the values to get the value in ml. for every one minute the client receives 2.5ml of the fluid.

For the reaction below, describe the temperature and pressure conditions that would produce the highest yield of the forward reaction. Explain your answer in terms of Le Châtelier's principle.

Answers

The correct answer for the question that is being presented above is this one: "CO(g) + 2H2 (g) <---> CH3OH (g) and that the reaction is exothermic (the delta H value is negative). The reaction is exothermic, so lowering the temperature will shift the equilibrium toward the right. Since the reaction uses 3 moles of gas to form 1 mole of gas, increasing the pressure will shift the reaction toward the right. So, low temperature and high pressure will produce the highest yield. Le Chatelier's principle states that when a system at equilibrium is disturbed, the system responds in such a way to minimize the disturbance."

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