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MArishka [77]
3 years ago
9

Students conduct an experiment in which steel wool is burned in a closed test tube. The steel wool reacts with an amount of oxyg

en equal to 1.43% of the mass of the steel wool. What is the correct value for the missing mass in the table?
Chemistry
2 answers:
Ksenya-84 [330]3 years ago
6 0
The answer is 43.48g
Lubov Fominskaja [6]3 years ago
6 0

The value of the mass in the missing table is 43.48 g. Since it is in a closed system, nothing would escape. The law of conservation of mass would state that the products mass would equal the reactants mass.

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A liquid occupies 321ml and has a mass of 376g. what is the density of the liquid?​
oee [108]

Answer:

The density of the liquid is 1.153 grams/ml.

Explanation:

You have to use the fomula of density

density = mass/volume ⇒ density = 376 grams/321 ml ⇒

density = 1.153 grams/ml.

6 0
3 years ago
What ion do most basic compounds contain?<br> A. H2O<br> B. H2O-<br> C. OH-<br> D. H-
mel-nik [20]
C is the correct answer I think
4 0
3 years ago
If 4.9 kg of CO2 are produced during a combustion reaction, how many molecules of CO2 would be produced?
solmaris [256]

Answer:

6.7 x 10²⁶molecules

Explanation:

Given parameters

Mass of CO₂  = 4.9kg  = 4900g

Unknown:

Number of molecules  = ?

Solution:

To find the number of molecules, we need to find the number of moles first.

 Number of moles  = \frac{mass}{molar mass}

          Molar mass of CO₂  = 12 + 2(16)  = 44g/mol

   Number of moles  = \frac{4900}{44}  = 111.36mole

A mole of substance is the quantity of substance that contains the avogadro's number of particles.

       1 mole  = 6.02 x 10²³molecules

     111.36 moles  =   111.36 x 6.02 x 10²³molecules   = 6.7 x 10²⁶molecules

5 0
3 years ago
Complete the sentence using ide, ate or Ic. To determine the name of an anion, you take the name of its element and replace the
lara31 [8.8K]

To determine the name of an anion, you take the name of its element and replace the end with "ide".

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

An anion in chemistry is a negatively charged ion.

Anions are usually formed when a non-metallic atom gains electron(s).

An anion is usually named by taking the elemental name, removing the ending, and adding “ide.

Examples of anions are as follows:

  • fluoride (F-)
  • Chloride (Cl-)
  • Iodide (I-)

Learn more about anions at: brainly.com/question/15578817

#SPJ1

8 0
2 years ago
Give TWO examples of energy conversion that produces unwanted forms of energy.
34kurt

For example, consider the energy used by an electric fan. The amount of electrical energy used is greater than the kinetic energy of the moving fan blades. Because energy is always conserved, some of the electrical energy flowing into the fan's motor is obviously changed into unusable or unwanted forms.

8 0
3 years ago
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