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3 years ago

My hypothesis is correct. The experiment and data show heavier objects bounce higher trampolines.

Chemistry

1 answer:

AleksAgata [21]3 years ago

7 0

The answer is A this is a conclusion.

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The missing components in the table to the right are indicated with orange letters. Complete table by filling in the correspondi

V125BC [204]

Answer :

A = In

B = 27

C = 73

D = 49

E = 56

F = 54

G = 66

H = 108

I = 32

Explanation :

Atomic number is defined as the number of protons or number of electrons.

Atomic number = number of protons = number of electrons

Mass number is defined as the sum of number of protons and number of neutrons.

Number of neutrons = Mass number - Number of protons

Number of electrons = Number of protons - charge

Element Number of Number of Number of Atomic

symbol protons electrons neutrons mass

Co 27 27 31 58

In 49 49 66 115

Ta 73 73 108 181

Ba²⁺ 56 54 81 137

S²⁻ 16 18 16 32

4 0

3 years ago

I NEED YALLS HELP ILL BRAINLIST/5 Star !! Answer in full sentence if u can.

Dmitry_Shevchenko [17]

The maximum number of electrons that the second shell can contain is 8 electrons.

8 0

3 years ago

Acidic solutions have pH value less than 7 . Select one : O True O False

Marina CMI [18]

Answer:

Explanation:

The answer is true.

8 0

3 years ago

Read 2 more answers

6 NaOH + 2 Al ???? 2 Na3AlO3 + 3 H2 How much aluminum is required to produce 17.5 grams of hydrogen? How many moles of NaOH are

ANTONII [103]

Answer:

a) 157.5 grams of aluminum.

b) 1 mol

c) 9 g

Explanation:

The reaction is :

$6 NaOH + 2Al ---> 2 Na_{3}AlO_{3} + 3H_{2}$

As per balanced equation

a) 3 moles of hydrogen will be produced from two moles of aluminium.

The atomic mass of aluminium = 27

therefore

3X2 grams of hydrogen is produced from 2 X 27 grams of Al

1 gram of hydrogen will be produced from $\frac{2X27}{3X2}= 9$ g

therefore 17.5 will be produced from = 9X 17.5 = 157.5 grams of aluminum.

b) as per balanced equation three moles or six gram of hydrogen is produced from 6 moles of NaOH.

Therefore 1 g of hydrogen will be produced from = $\frac{6}{6}$

or 1 gram will be prepared from = 1 mole

c) from balanced equation three moles are produced from two moles of Al (27X2 = 54 g).

thus from 54 grams gives 6 grams of hydrogen

1 grams will give = $\frac{54X1}{6}= 9 g$

7 0

3 years ago

Read 2 more answers

1. How are the valence electrons in lithium and sodium atoms different?

Eva8 [605]

Answer:

if you look at the number at the top of the element square you can find the amount of positive atoms wich is also the amount of negative atoms. so if you count the valence electrons then that would be you difference

explanation:

Valence electrons are the amount of negative atoms on the outermost shell.

6 0

3 years ago