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3 years ago

30,434 and 43,403 alike and difrente

1 answer:

7 0

They are alike because they have the same numbers in a different order. One is reversing the numbers of the original set. They are different because one number is larger in value while the other is lesser in value compared to each other.

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When an atom is netural the number of the ? and ? are the same <br><br> 7TH GRADE SCIENCE

Effectus [21]

protons and electrons are the same

5 0

3 years ago

Read 2 more answers

Can someone help me i will give 100 points

cestrela7 [59]

Answer:

california

Explanation:

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1 year ago

Read 2 more answers

Q2. The table gives the composition of three particles.

Kisachek [45]

Answer:

The proton and electrons are equal,

15protons and 15electrons

Explanation:

An atom is the smallest electrical neutral particle of an element so it means that every atom have same number of protons and electrons.

8 0

3 years ago

What is the mole fraction of NaOH in an aqueous solution that

astraxan [27]

Answer:

The mole fraction of NaOH in an aqueous solution that contain 22.9% NaOH by mass=0.882

Explanation:

We are given that

Aqueous solution that contains 22.9% NaOH by mass means

22.9 g NaOH in 100 g solution.

Mass of NaOH(WB)=22.9 g

Mass of water =100-22.9=77.1

Na=23

O=16

H=1.01

Molar mass of NaOH(MB)=23+16+1.01=40.01

Number of moles = $\frac{Given\;mass}{Molar\;mass}$

Using the formula

Number of moles of NaOH $(n_B)=\frac{W_B}{M_B}=\frac{22.9}{40.01}$

$n_B=0.572moles$

Molar mass of water=16+2(1.01)=18.02g

Number of moles of water $(n_A)=\frac{77.1}{18.02}$

$n_A=4.279 moles$

Now, mole fraction of NaOH

= $\frac{n_B}{n_B+n_A}$

$=\frac{4.279}{0.572+4.279}$

=0.882

Hence, the mole fraction of NaOH in an aqueous solution that contain 22.9% NaOH by mass=0.882

4 0

3 years ago

Formula for Sodium Hydrogen Carbonate NaHCO3? or Na2HCO3?

yan [13]

NaHCO3 is the right answer

8 0

3 years ago