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4 years ago

What is an atom called

Chemistry

2 answers:

stepladder [879]4 years ago

8 0

Answer:

b. Ion.

Explanation:

Examples of ions are:

Na+ , where the sodium atom has lost 1 electron.

Cl- , where the chlorine atoms has gained 1 electron.

luda_lava [24]4 years ago

4 0

Answer:

I believe it's A. molecule....

Explanation:

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What are the two types of elements that make covalent bonds

velikii [3]

Answer:

Two non metal combined together and form the bond is called covalent bond

Note - yellow color molecules in pictures are non metal elements

example - co2 , so2,

Explanation:

6 0

4 years ago

When 55.8 g of Fe reacts with Cl2 according to the equation 2Fe + 3Cl2 --> 2FeCl3. How many moles of Cl2 are required to reac

harkovskaia [24]

Answer:

1.50 moles

Balanced equation: 2Fe + 3Cl₂ --> 2FeCl₃

find moles of iron:

moles = mass/Mr

moles = 55.8/56

moles = 0.9964 moles

use molar ratio:

2Fe : 3Cl₂

2 : 3

moles of Cl₂ = (0.9964/2)*3 = 1.50 moles

8 0

3 years ago

A liquid in lab has a density of 1.24g/cm3. What is the mass in grams of 254mL of the liquid?

o-na [289]

Answer:

Mass= 314.96 grams

Explanation:

The density of the substance is defined as mass per unit volume of it.

The formula is :

$density=\frac{mass}{Volume}$

Unit conversion:

1 liter = 1000 ml

$1dm^{3}=1Liter$

$1dm^{3}=1000ml$ ....(1)

$1dm^{3} = (10cm)^{3}$

$1dm^{3}=1000cm^{3}$

Replace The dm3 by cm3 in (1)

$1000cm^{3}=1000mL$

$1cm^{3}=1mL$

Volume = 254 mL = 254 cm3

Calculation of mass

$density=\frac{mass}{Volume}$

$1.24=\frac{mass}{254cm^{3}}$

$mass=1.24\times 254$

Mass= 314.96 grams(or 315 grams)

Note: Always makes same units before solving the question. You can not determine the mass if Volume is in mL and Density is in g/cm3. Change mL into cm3 first

8 0

3 years ago

Determine a piece of copper with a volume of 100 cm power 3 has a mass of 890 g. Explain how you could use this information to f

balandron [24]

You will have to multiply 13 by 100 and then divide 3 and get 60

8 0

3 years ago

Which of the following compounds, when placed in water, would NOT allow

igomit [66]

Answer:

Sucrose (C12H22011) will not let a lightbulb light in water

Explanation:

Sucrose is too soluble to allow a lightbulb to light.

5 0

4 years ago