BARINLY PLS HELP ME ASP !!! it’s science I need help fast pls

Isotopes : the same atomic number, but different mass numbers  

Atomic mass is the average atomic mass of all its isotopes  

avg atomic mass = m1.%m1 + m2.%m2....mn.%mn

You did not include the mass of each isotope

Element X :

X-23 = 41.9%

X-25 = 58.1%

The average atomic mass of Element X :

[tex]\tt =0.419\times mass~X-23+0.581\times mass~X-25[/tex]

The value of DP in the rectangle QUAD can be gotten by equating DP and DA which will be 17 units.

From the complete question, DP = 4x + 1, and PA = x + 13. In this case, the value of DP will be calculated thus:

DP = DA (property of rectangle)

4x + 1 = x + 13

Collect like terms

4x - x = 13 - 1

3x = 12

Divide both side by 3

3x/3 = 12/3

x = 4

Therefore, DP will be:

= 4x + 1

= 4(4) + 1

= 16 + 1 = 17

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Answer:

Dmitri Ivanovich Mendeleev

Explanation:

A Russian chemist Dmitri Ivanovich Mendeleev gave the framework of the periodic table in 1869

Answer:

the first person was Dimitri mendeleev

Answer:

C newton's..................

When sodium acetate is dissolved in water, it is hydrolyzed into ions.

When a salt of weak acid or base is dissolved in water, this salt hydrolysis in it. Water ionises into hydroxide and hydrogen due to addition of sodium acetate. In water, sodium acetate splits into sodium and acetate ions.

So we can conclude that when sodium acetate is dissolved in water, it is hydrolyzed into ions.

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Answer:

Ello and im good

Explanation:

Answer:

Hello good how are you

Explanation:

Answer:

Explanation:

option C is correct

Answer:

The moon is covered in Earth’s shadow.

Explanation:

When the moon goes behind the earth to the shadow it becomes a solar eclipse.

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Answer:

20.1797 u or g/mol

Explanation:

I looked it up.

first one: like charges

second one: opposite charges

third one: opposite charges

fourth one: opposite charges

yw :)

Answer:

species like plants, animals , human etc

Answer:

Dogs, Chocolate, Tvs, Phones.

Explanation:

Answer:

most likely climate changes and or mass extinction

Explanation:

Answer:

Look below

Explanation:

Climate changes.

Neon element which is in gaseous form is used in lit advertising signs as it emits reddish orange glow on passage of current through it.

It is defined as a substance which cannot be broken down further into any other substance. Each element is made up of its own type of atom. Due to this reason all elements are different from one another.

Elements can be classified as metals and non-metals. Metals are shiny and conduct electricity and are all solids at room temperature except mercury. Non-metals do not conduct electricity and are mostly gases at room temperature except carbon and sulfur.

The number of protons in the nucleus is the defining property of an element and is related to the atomic number.All atoms with same atomic number are atoms of same element.

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#SPJ2

Answer:

The answer is "0.015 M ".

Explanation:

[tex]M_1 = 1.25 \ M\\\\M_2 = M_2\\\\V_1 = 5.00 \ mL\\\\V_2 = 25.00 \ mL \\\\\bold{\text{Formula:}}\\\\\to M_1 \times V_1 = M_2\times V_2\\\\\to M_2 = \frac{ M_1 \times V_1}{V_2}\\\\=\frac{( 1.25 \times 5.00 )}{ 25.00}\\\\=\frac{( 6.25 )}{ 25.00}\\\\= 0.25 \ M \\\\[/tex]

If the volume [tex]V_2 = 3.00 \ mL[/tex]

[tex]M_3=M_3 \\\\V_3 = 50.00 \ mL\\[/tex]

Formula:

[tex]M_3 = \frac{M_2 \times V_2}{V_3}[/tex]

     [tex]= \frac{ 0.25 \times 3.0}{50.0}\\\\ = \frac{ 0.75}{50.0}\\\\ = 0.015 \ M \\\\[/tex]

Convert mole to gram multiply it by the molar mass of BeI2

BeI2 molar mass = 262.8122g

0.6 moles x 262.8122g = 157.68g BeI2

The reaction is given by

[tex]\\ \rm\Rrightarrow C_6H_5OH+Zn\longrightarrow C_6H_6+ZnO[/tex]

Answer:

See below ~

Explanation:

Some inherited traits can be changed by an organism's environment because environment has a direct impact on organisms.

Traits allow a plant, animal, or other organism to survive and reproduce in its environment which is known as adaptations. Natural selection occurs when there is some variation in the inherited traits of organisms within a species.

So we can conclude that some inherited traits can be changed by an organism's environment because environment has a direct impact on organisms.

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Answer:

atomic mass is the mass of an atom compared to that of carbon 12 isotope while molecular mass is the mass of a given molecule

Explanation:

Answer:

the answer is convalent bonds

Explanation:

Strong linkages—called covalent bonds—hold together the hydrogen (white) and oxygen (red) atoms of individual H2O molecules. Covalent bonds occur when two atoms—in this case oxygen and hydrogen—share electrons with each other.

i hope this helped

Answer:

As the coil moves through the magnetic field, created by the magnet, an electric current flows through it. The electric current flows out from the microphone to a computer or other recording device, and you can hear it. Aspeaker works in almost the same way, except that the process isreversed.

Answer:

hot object to cold object

Answer:

just wanted points

Explanation:

i wasted your time srry

Answer:

Construction

Explanation:

The number of grams of iron present in 14.79 cm length of the same iron rod is 640.51 g.

Ounces is a unit of mass which is used to define a very little amount of anything.

In the question, given that:

In one inch of iron rod whose weighs is 3.88 ounces = 2.54 cm long

In 1 g = 0.035273 ounces present

So we can calcuylate the number of grams in which 3.88 ounces present as:
x = (3.88 ounces) / (0.035273 ounces/g)

x = 110g

So, in 110g = 3.88 ounces present

And in 2.54 cm = 110g of iron present

In 14.79 cm, present grams of iron can be calculated as:

y = (14.79cm x 110g) / 2.54cm

y = 640.51 g

Hence option (c) is correct i.e. 640.51 g.

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The weight of the iron rod with 14.79 cm length with same density is given by: Option C; 640.51 g

Suppose that a finite amount of substance is there having its properties as:

Then, they are related as:

[tex]d = \dfrac{m}{v}[/tex]

We know that:

Now, from the facts given in the problem, we have:

The weight of first iron rod which is one inches long = 3.88 ounces

The new rod is 14.79 cm long. And 1 cm = 0.3937 inches approx, thus the new rod is: [tex]14.79 \times 0.3937 \approx 5.8228 \: \rm inches[/tex]

As for 1 inch long rod, there is  weight of 3.88 ounces, thus:

for 5.8228 inch rod, the weight of the rod would be [tex]5.8228 \times 3.88 \approx 22.5924 \: \rm ounces[/tex]

And since 1 ounce = 28.3495 g approx

Thus, weight of the new rod in grams would be [tex]22.5924\times 28.3495 \approx 640.485 \approx 640.51\: \rm g[/tex]

Thus, the weight of the iron rod with 14.79 cm length with same density is given by: Option C; 640.51 g

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Answer:

13.04%

Explanation:

m/v = g/mL *100 = 3.26/25*100

Answer:

make the particles close together (eg a solid is more dense than liquids as it has a fixed shape)

Answer:

It is the way of cleaning of impurities present in metals