All categories

3 years ago

Question 16 (6 points)

Chemistry

1 answer:

MakcuM [25]3 years ago

6 0

Answer:

1.) Fluorine

2.) Francium

3.) Nonmetals

4.) Metals

5.) Aluminum

6.) Helium

Explanation:

You might be interested in

How do the properties of elements change as you move across a period

denpristay [2]

The number of shells increase, the energy level their outer shell have decreases as we go down wards,

3 0

3 years ago

When a teacher dilutes 50 mL of 2.0 M NaOH to 0.50 M, what volume of NaOH results?

JulijaS [17]

Answer:

= 200 mL

Explanation:

Using the dilution formula;

M1V1 = M2V2 ;

Where, M1 is the concentration before dilution, V2 is the volume before dilution, while M2 is the concentration after dilution and V2 is the volume after dilution.

M1 = 2.0 M

V1 = 50 mL

M2 = 0.50 M

V2 = ?

V2 = M1V1/M2

= ( 2.0 × 50 )/ 0.5

= 200 mL

Therefore, the volume after dilution will be, 200 mL

6 0

3 years ago

Lithium-4 and Lithium-5 can be defined as:

Ludmilka [50]

Answer:

A: isotopes

Explanation:

Hello.

In this case, since isotopes are defined as atoms of the same element with the same atomic number (number of protons and electrons) but different mass number (atomic mass) we can represent them via the symbol of the element followed by a dash indicating the atomic mass of the occurring isotope, for instance, for carbon, we may find C-12, C-13 and even C-14 which is useful in dating techniques.

Therefore, Lithium-4 or Li-4 and Lithium-5 or Li-5 can be defined as isotopes.

Best regards.

8 0

3 years ago

Assign an oxidation number to each element in the reaction. co(g) 2h2(g) → ch3oh(g) in co, the oxidation number of c is , and th

Andrei [34K]

The oxidation state is the number of electrons gained and donated. The oxidation state of C is +2, O is -2, H is 0, and in methanol, C is +1, H is +1, and O is -2.

<h3>What is the oxidation number?</h3>

The oxidation number denotes the number of electrons donated and gained after the bond formation. In general, the oxidation state of free elements is zero, and of hydrogen when the bond to non-metal is +1 and with metals is -1.

The chemical reaction is given as,

$\rm CO + 2H_{2} \rightarrow CH_{3}OH$

Here,

The oxidation number of carbon in carbon monoxide will be +2, and oxygen will be -2.

The oxidation number of hydrogen in dihydrogen will be zero, and in methanol, the oxidation number of carbon will be +1, hydrogen will be +1 and oxygen will be -2.

Therefore, the oxidation number of oxygen is -2 most of the time.

Learn more about oxidation numbers here:

brainly.com/question/16326344

7 0

2 years ago

How many grams are there in 3.4 x 10^24 molecules of NH3

a_sh-v [17]

Answer:

96g

Explanation:

3.4x10^24 molecules x (1 mol/6.0223x10^23) x (17g/ 1 mol) = 96 g

6 0

2 years ago