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natta225 [31]
3 years ago
11

As we go down a group

Chemistry
2 answers:
Gemiola [76]3 years ago
5 0

remains the same

it remains teh same

Stolb23 [73]3 years ago
4 0

Answer:

Number of valence electrons stays the same

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Find the density of a block with a length of 8.0 cm, a width of
seraphim [82]

Answer:

<h3>Density = 0.5 g/cm³</h3>

Explanation:

Density of a substance can be found by using the formula

Density =  \frac{mass}{volume}

From the question

mass = 32g

To find the density we must first find the volume of the block

From the question the block is a cuboid

Volume of cuboid = length × width × height

length = 8 cm

width = 4 cm

height = 2 cm

Volume of block = 8 × 4 × 2 = 64 cm³

Substitute the values into the above formula and solve for the density

That's....

Density =  \frac{32}{64}  \\  =  \frac{1}{2}

We have the final answer as

Density = 0.5 g/cm³

The block will float because it's density is less than the density of water which is

1 g/cm³

Hope this helps you

6 0
3 years ago
Read 2 more answers
Groups or families in the periodic table have what in common
sammy [17]
Each column is called a group<span>. The elements in each </span>group have<span> the same number of electrons in the outer orbital. Those outer electrons are also called valence electrons.</span>
7 0
3 years ago
Read 2 more answers
Find the volume of hydrogen gas formed when 1.5g of aluminum reacts with aq NaOH at 27 degrees Celcius.
Rudiy27

Answer:

how can I solve this ?4Al+3O2 produce 2Al2O3 find a) oxygen atoms needed to react with 5.4 g of aluminium b) grams of oxygen needed to react with 0.6 mol of aluminium?

(A) n=m/M,

n(Al)=5.4/27=0.2 moles

n(O2)=n(Al)*3/4=0.2*3/4=0.15 moles

Number of oxygen atoms= n(O2)*Avogadro's number

=0.15*6.02*10^23=9.03*10^22 oxgyen atoms

(B)

n=m/M

n(Al)=0.6/27=0.02222 moles

n(O2)=n(Al)*3/4=0.016666 moles

m=n*M

m(O2)=0.0166666*32=0.53333 grams

8 0
2 years ago
Which statement illustrates how engineering has influenced society?
Amanda [17]

Answer:

i think O.C is correct answer

Explanation:

<h2>hope it's helps you </h2>

hello hi bye bye item until you know Nana Nana Nana Nana Nana Nana Nana Nana Nana Nana

4 0
4 years ago
Read 2 more answers
Doreen schmidt is a chemist. she needs to prepare 3232 ouncesounces of a 1010​% hydrochloric acid solution. find the amount of 1
slavikrds [6]
24 ounces of 8% solution and 8 ounces of 16% solution to create 32 ounces of 10% solution.  
OK. We need 32 ounces of 10% solution and we have 16% and 8% solutions available. So let's set up an equation to solve. I'll use the variable X to represent the amount of 8% solution needed. 
X*0.08 + (32-X)*0.16 = 32*0.10 
 Now simplify and solve.
 X*0.08 + (32-X)*0.16 = 32*0.10
 X*0.08 + 32*0.16 - X*0.16 = 32*0.10
 X*0.08 - X*0.16 = 32*0.10 - 32*0.16
 X(0.08 - 0.16) = 32(0.10 - 0.16)
 X(-0.08) = 32(-0.06)
 X = 32(-0.06)/(-0.08)
 X = 24 
 So we need 24 ounces of 8% solution and (32 - 24) = 8 ounces of 16% solution.
6 0
3 years ago
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