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2 years ago

What class of elements do iron and nickel belong?

Chemistry

1 answer:

sergey [27]2 years ago

5 0

IM THINKING THEY BELONG IN THIS CLASS OF ELEMENTS VILL B.
Hope i Helped

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Proteins contain<br>a. oxygen<br>b. nitrogen <br>c. hydrogen<br>

seraphim [82]

Answer:

All of the above

Explanation:

Proteins contain a long chain of amino acids which are a chain of oxygen, nitrogen, carbon, hydrogen or sulfur.

HOPE THIS HELPED

7 0

2 years ago

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What is the chemical equation for lead (ll) acetate reacts with potassium iodide to produce lead(ll) iodide and potassium acetat

cluponka [151]

Answer:

Pb(C2H3O2)2 + KI ----> PbI2 + KC2H3O2

Explanation:

all the numbers are written as subscripts

6 0

2 years ago

Density is a ___ that ____ the ____ of an object to its ______

Tju [1.3M]

Answer:

density is a PROPERTY that DESCRIBES<u> </u>the MASS of an object to its VOLUME.

Explanation:

7 0

2 years ago

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Rubbing alcohol or isopropanol can be described by the chemical formula C3H7OH. One milliliter of isopropanol has a mass of 0.76

SVETLANKA909090 [29]

A chemical property of isopropanol : D. Isopropanol is flammable.

<h3>Further explanation </h3>

There are changes that occur in the mater: physical changes and chemical changes

Classification uses the principle of the initial and final state of the substance.

Physical changes do not form new substances, so the properties of the particles remain the same.(size,volume,shape)

Example : boiling and freezing, just change its phase form from liquid to gas or from liquid to solid

Chemical changes/reaction form new substances(products) that are different from the initial substances(reactants)

Example : toxic, corroded

So :

the physical properties of isopropanol :

<em>mass, density, evaporation</em>

the chemical properties of isopropanol :

<em>highly flammable</em>

5 0

3 years ago

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A sample of kerosene has a mass of 36.4g. It’s volume is 45.6mL. What is the density of kerosene?

stira [4]

Answer:

<h2>Density = 0.8 g/cm³</h2>

Explanation:

The density of an object can be found using the formula

<h3> $Density(\rho) = \frac{mass}{volume}$ </h3>

From the question

mass of kerosene = 36.4 g

volume of kerosene = 45.6 mL

To find the density substitute the values into the above formula and solve

We have

<h3> $Density = \frac{36.4}{45.6}$ </h3>

= 0.7982

We have the final answer as

<h3>Density = 0.8 g/cm³</h3>

Hope this helps you

4 0

3 years ago