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2 years ago

What is the likelihood that black holes exist in our galaxy? Explain your response.

SAT

1 answer:

hodyreva [135]2 years ago

8 0

Explanation:

Roughly one out of every thousand stars that form is massive enough to become a black hole. Therefore, our galaxy must harbor some 100 million stellar-mass black holes. Most of these are invisible to us, and only about a dozen have been identified. The nearest one is some 1,600 lightyears from Earth.

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When 2. 0 m aqueous solutions of sodium bicarbonate and hydrochloric acid react, it produces carbon dioxide, water and sodium ch

OLEGan [10]

The number of mole of carbon dioxide, CO₂ formed from the reaction is 0.0632 mole.

<h3>How to determine the mole of NaHCO₃</h3>

Molarity of NaHCO₃ = 2 M
Volume = 31.6 mL = 31.6 / 1000 = 0.0316 M
Mole of NaHCO₃ =?

Mole = Molarity x Volume

Mole of NaHCO₃ = 2 × 0.0316

Mole of NaHCO₃ = 0.0632 mole

<h3>How to determine the mole of CO₂</h3>

NaHCO₃ + HCl —> CO₂ + H₂O + NaCl

From the balanced equation above,

1 mole of NaHCO₃ reacted to produce 1 mole of CO₂.

Therefore,

0.0632 mole of NaHCO₃ will also react to produce 0.0632 mole of CO₂.

Thus, 0.0632 mole of CO₂ was obtained from the reaction

Learn more about stoichiometry:

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8 0

2 years ago

Ivan was given two data sets, one without an outlier and one with an outlier. data without an outlier: 108, 113, 105, 118, 124,

Debora [2.8K]

Median is the middle data in the list of the given numbers. In the given data set the median gets decreased by the presence of the outlier. Thus, option C is correct.

<h3>What is an outlier?</h3>

An outlier is a data that varies significantly from the other data set, due to some error or measuring variability.

The median of the data without outlier is calculated as:

First, data is arranged in the ascending order: 105, 108, 109, 113, 118, 121, 124

Median = $\rm \dfrac{7 + 1 ^{th}}{2} term$

= 4th term

= 113

The median of the data with outlier is calculated as:

First, data is arranged in the ascending order: 61, 105, 108, 109, 113, 118, 121, 124

Median = $\rm \dfrac{(\dfrac{8}{2})^{th} + (\dfrac{8}{2} + 1)^{th}} {2}$

= (109 + 113) ÷ 2

= 111

Therefore, the outlier decreased the median.

Learn more about median here:

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6 0

2 years ago

A client is prescribed a nitroglycerin transdermal patch to treat angina. Which statement does the nurse include when reinforcin

sammy [17]

When the nurse is reinforcing medication, the statement that she has to tell him should be apply the patch every morning and leave there for period of 12 to 14 hours, then remove it in the evening.

<h3>What is angina?</h3>

This is the condition that humans may have that would include very painful chest problems. The pain is usually severe. This pain would spread to the shoulder and other body parts. The reason would be poor circulation of blood.

<h3>What does it mean to reinforce medication?</h3>

This has to do with all of the ways that the nurse is going to ensure that there is medication compliance. It is necessary for people with health issues to adhere to taking their medications.

This would help to ensure that there is team based care that would last for only a period of time. It would help the patient to get better faster.

Hence the statement that has to be included when reinforcing medication would be: apply the patch every morning and leave there for period of 12 to 14 hours, then remove it in the evening.