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Zigmanuir [339]
3 years ago
11

Question 4(Multiple Choice Worth 4 points)

Chemistry
2 answers:
Sveta_85 [38]3 years ago
6 0
C because endangered animals cannot be tested in the scientific method
boyakko [2]3 years ago
6 0

Answer: C) Why should endangered animals be protected?

Explanation:

A science is a discipline which can answer questions related to the cause of natural processes or events occurring in the natural world. The questions related to science can be answered by experimental procedures.

C cannot be answered by science as it is a question of moral question related to social ethics. The endangered animals if abolished will negatively reduce the biodiversity of the organisms living on earth.  

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What mass in grams of hydrogen is produced by the reaction of 4.73 g of magnesium with 1.83 of water
Luba_88 [7]

The mass, in grams, of hydrogen that would be produced from the reaction will be 0.102 grams

<h3>Stoichiometric calculations</h3>

From the balanced equation of the reaction:

Mg + 2H_2O -- > Mg(OH)_2 + H_2

The mole ration of magnesium to water is 1:2.

Mole of 4.73 grams Mg = 4.73/24.3 = 0.195 moles

Mole of 1.83 grams water = 1.83/18 = 0.102 moles

Hence, water is limiting.

Mole ratio of water to the hydrogen produced = 2:1

Equivalent mole of hydrogen gas produced = 0.102/2 = 0.05 moles

Mass of 0.05 moles hydrogen gas = 0.05 x 2 = 0.102 grams

More on stoichiometric calculations can be found here: brainly.com/question/27287858

#SPJ1

4 0
2 years ago
I need help on first wuestion
yawa3891 [41]

Answer:

Atom then element

Explanation:

Scientists once thought the most fundamental building block of matter was a particle called the atom. Now we know that the atom is made of many smaller pieces, known as subatomic particles. Every atom contains a central core called the nucleus, made of particles called protons and neutrons.

An element is a pure substance and is made of only one type of atom; it cannot be broken down into a simpler substance.

3 0
3 years ago
What are the units we use to define volume and mass
anzhelika [568]

The units we use are cube 3 and square 2

6 0
3 years ago
Give an example of elastic potential energy
Misha Larkins [42]

Answer:

An archer's stretched bow.

Explanation:

Elastic potential energy is energy stored as a result of applying a force to deform an elastic object.

8 0
3 years ago
How many moles are in 25g of NaCl? plz help!!
Inessa05 [86]

25 g NaCl x 1 mols NaCl/58.44 g NaCl = 0.4278 mols

sig figs: 0.43 mols of NaCl

molar mass of NaCl : 58.44 grams make sure to use 2 decimal places for the mass


5 0
3 years ago
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