All categories

4 years ago

Match each statement to the type of behavior it describes.

Chemistry

2 answers:

wariber [46]4 years ago

7 0

Answer:

RESPONSIBLE:

1. Joanna aims to develop a scientific product that will improve people's lives.

2. Alisha uses credible research to publish a report about the negative effects of getting insufficient sleep.

IRRESPONSIBLE:

1. Henry was selective in his use of data; he used only the data that supported his hypothesis.

2. Kevin combined data from two unrelated experiments in an effort to impress his instructor.

Novay_Z [31]4 years ago

6 0

Answer:

Henry was selective in his use of data; he used only the data that supported his hypothesis. Irresponsible.
Joanna aims to develop a scientific product that will improve people's lives. Responsible.
Kevin combined data from two unrelated experiments in an effort to impress his instructor. Irresponsible.
Alisha uses credible research to publish a report about the negative effects of getting insufficient sleep. Responsible.

Explanation:

It is irresponsible for Henry to use only data that supports his hypothesis. To prove that a hypothesis is true, data that can bring the hypothesis down has to be used too.

Joanna is doing a very responsible action by trying to develop a product that can help and improve society.

Trying to impress your instructor by combining two unrelated experiments, is an irresponsible act because you are not researching or formulating a hypothesis to help the society you are doing it for the wrongs reasons and it is not helping anyone.

Using credible research to publish a report is a responsible action because the information is accurate and reliable.

You might be interested in

A student added magnesium hydroxide to a solution of hydrochloric acid. What is the

r-ruslan [8.4K]

Answer:

bleh

Explanation:

Neutralization reaction between magnesium hydroxide and hydrochloric acid Mg(OH)2(s) + 2HCl(aq) → 2H2O(l) + MgCl2(aq) b.

so uh pretty sure Mg(OH)2(s) + 2HCl(aq) → 2H2O(l) + MgCl2(aq) b.

correct me if im wrong <3

6 0

3 years ago

a solution is made by dissolving cadmium fluoride (CdF2 Ksp =6.44×10 −3 ) in 100.0 mL of water until excess solid is present. So

Lunna [17]

Answer:

Answers are in the explanation

Explanation:

Ksp of CdF₂ is:

CdF₂(s) ⇄ Cd²⁺(aq) + 2F⁻(aq)

Ksp = 6.44x10⁻³ = [Cd²⁺] [F⁻]²

When an excess of solid is present, the solution is saturated, the molarity of Cd²⁺ is X and F⁻ 2X:

6.44x10⁻³ = [X] [2X]²

6.44x10⁻³ = 4X³

X = 0.1172M

Ksp of LiF is:

LiF(s) ⇄ Li⁺(aq) + F⁻(aq)

Ksp = 1.84x10⁻³ = [Li⁺] [F⁻]

When an excess of solid is present, the solution is saturated, the molarity of Li⁺ and F⁻ is XX:

1.84x10⁻³ = [X] [X]

1.84x10⁻³ = X²

X = 0.0429

<h3>[F⁻] = 0.0429M</h3><h3 /><h3>The solution of CdF₂ has the higher fluoride ion concentration</h3>

7 0

3 years ago

How many kJ of heat do you need to raise the temperature of 400 g of ethanol from 20 °C to 60 °C?

hodyreva [135]

Taking into account the definition of calorimetry ans sensible heat, you need a heat of 38.72 kJ to raise the temperature of 400 g of ethanol from 20 °C to 60 °C.

<h3>What is calorimetry and sensible heat</h3>

Calorimetry is the measurement and calculation of the amounts of heat exchanged by a body or a system.

Sensible heat is defined as the amount of heat that a body absorbs or releases without any changes in its physical state (phase change).

So, the equation that allows to calculate heat exchanges is:

Q = c× m× ΔT

where

Q is the heat exchanged by a body of mass m.
c is the specific heat substance c.
ΔT is the temperature variation.

<h3>Amount of heat in this case</h3>

In this case, you know:

Q= ?
c= 2.42 $\frac{J}{gC}$
m= 400 g
ΔT= Tfinal - Tinitial= 60 °C - 20 °C= 40 °C

Replacing in the definition of sensible hear:

Q = 2.42 $\frac{J}{gC}$ × 400 g× 40 °C

Solving:

Finally, you need a heat of 38.72 kJ to raise the temperature of 400 g of ethanol from 20 °C to 60 °C.

Learn more about sensible heat:

brainly.com/question/13639835

brainly.com/question/14057615

brainly.com/question/24988785

brainly.com/question/21315372

brainly.com/question/13959344

#SPJ1

5 0

2 years ago

PLEASE, PLEASE HELP ME!!!

Luba_88 [7]

Answer:

Matter cannot be created or destroyed.

Explanation:

According to law of conservation of matter, Matter can neither be created nor destroyed. It just gets converted into other forms.

So, It's important to equalize the no. of moles on either side of the chemical reaction.

$\rule[225]{225}{2}$

Hope this helped!

<h3>~AnonymousHelper1807</h3>

6 0

3 years ago

When C2H5Cl(g) is burned in oxygen, chlorine gas is produced in addition to carbon dioxide and water vapor. 5145 kJ of heat are

Arisa [49]

<u>Answer:</u> The chemical equation is written below.

<u>Explanation:</u>

Combustion reaction is defined as the chemical reaction in which a hydrocarbon reacts with oxygen gas to produce carbon dioxide gas and water molecule.

$\text{hydrocarbon}+O_2\rightarrow CO_2+H_2O$