What the cm and mm for this

Answer:

tae nimo par and thankyou

Explanation:

i hope its help

Answer: Yes, if there are more shells the nuclear charge decreases.

Answer:

The gas particles must touch a cold surface to start to slow down and get closer to form a liquid.

Answer:1) 9,5 грамм

2) 1,8 л вроде

Explanation:

1) H2+F2=2HF

n(H2)=1 моль. n(F2)=1моль

M(H2)=1г/моль. М(F2)= 19г/моль

0,5:1=х:19.

2) H2S+2NaOH=2H2O+Na2S

M(H2S)= 34г/моль. М(NaOH) =40г/моль

5,6:80=х:34. m(H2S)= 2,38г.

n(H2S)= 2,38:34≈0,08

V=Vm•n= 22,4 • 0,08=1,8

Answer: 28. A

26. E

23. C

Explanation:

Only know a couple sorry

Carbonated beverages contain dissolved carbon dioxide gas. Low temperatures are best to minimize the solubility. option C is correct.

Drinks that have carbon dioxide dissolved in the water are referred as carbonated beverages. The presence of this gas causes the liquid to froth.

Carbonation takes place by applying pressure. Spring water, beer and soda, and pop are a few examples of carbonated beverages. When carbon dioxide  is absorbed in a liquid, for example spring water, it absorbs Carbon dioxide from the subsurface. It can also happen naturally. Beer is  example of a naturally carbonated beverage as the brewing process produces carbon dioxide soda .

Thus option C is correct.

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Answer:

Explanation:

The only way to know for sure if a chemical reaction has occurred is to identity that a new compound has been formed. There are signs

we can look for that help to determine if a chemical reaction has occurred. One sign of a chemical reaction is the formation of a gas

observed as bubbling, flezing, or foaming.

Some chemical reactions, like the burning of wood, result in the production of heat or light energy.

A change in temperature either an increase or decrease, can indicate that a chemical reaction has occurred.

The formation of a precipitate is another sign of a chemical reaction. A

precipitate is a solid substance that separates from a solution.

A change in color such as we see in the rusting of a bike chain, is the final sign that a chemical reaction has occurred. If one or more of these signs is

presnt, a chemical reaction has occurred

Answer:

-indicates that the measurement is also precise.

Explanation:

Pretty sure it's option 2.

Answer: 0.337 mol Ca

Explanation: 13.5 g Ca ÷ (40.1 g/mol Ca) =

Answer:

13.5/40+0.3375

Explanation:

Explanation:

xác định nội năng chuẩn ΔU của phản ứng tổng hợp amoniac

ở 400 0 C, biết :

N 2(k) + 3H 2(k) = 2NH 3(k) ΔH 0 T = - 109,0 kJ

Answer:

When nitric acid reacts with ammonia, ammonium nitrate is formed.

Answer:

Have you gotten your answer yet?

The average atomic mass of element X is 85.26 amu.

To calculate the average atomic mass of Element X, we need to take into account the abundance of each isotope and its respective atomic mass.

First, let's assign variables to the abundance and atomic mass of each isotope:

- Isotope 1: abundance = 82.15%, atomic mass = 84.9118 amu

- Isotope 2: abundance = 17.85%, atomic mass = 86.9092 amu

To calculate the average atomic mass, we can use the following formula:

average atomic mass = (abundance₁ ×atomic mass₁) + (abundance₂ ×atomic mass₂)

Substituting the values:

average atomic mass =

[tex]\dfrac{82.15\times84.9118}{100}+\dfrac{17.85\times86.9092}{100}\\=85.26 \ \rm{amu}[/tex]

Thus, average atomic mass of element X is 85.26 amu.

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Answer:

(a) (i) All the elements of a group have similar chemical properties because they have the same no. of valence electrons in their outermost shell. (ii) All the elements of a period have different chemical properties because they have different no. of valence electrons in their atoms.

Answer:

Hey mate...

Explanation:

This is ur answer....

Effervescence is the escape of gas from an aqueous solution and the foaming or fizzing that results from that release.

Hope it helps!

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Explanation:

Your answer is effervensecence

Answer:

2 mins

Explanation:

because it will let it soak into your ear and get everything out

Answer:

earth quakes, tornados, hurricans

Answer:

1.An initial observation is the measurement that you take before you start any process that might cause a change. When you compare your subsequent observations with the initial one, you will see whether any change has taken place, and you will be able to measure the change.

Explanation:

D ko po alam yung iba

Answer:

the answer is the option 4

Explanation:

i believe its number 4 because when you live near a beach the temperature is cooler

Answer:

They need to put a question that has an error in it

Answer:

The capillary tube was too close to the bottom of the beaker.

The ruler may have moved.

Water got into the capillary tube.

The temperature was not allowed to equilibrate in the 2-4 minutes

Answer:

elements from group four to eight

1.003

3.441

2 O

first

third

Answer:

A IS DISPLACEMENT

B IS VOLUME

C IS DENSITY

D IS MASS

Recall f=ma

f = 2 x 2 = 4N

The amount of force is 4N

It's called "competition"

Answer:

3 2 4 5 1

Explanation:

The position of an element on the periodic table depends on its chemical properties.

The periodic table is an arrangement of elements in groups an periods. The elements in the same group are chemically similar while the elements that are in the same period only have the same number of shells.

The question is  incomplete as the required charts are not shown. However, the position of an element on the periodic table depends on its chemical properties.

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Answer:

.80*10⁻³ moles of HCl can be produced from 0.226 g of SOCl₂

Explanation:

The balanced reaction is:

SOCl₂ + H₂O ----> SO₂ + 2 HCl

By stoichiometry of the reaction they react and produce:

SOCl₂: 1 mole

H₂O: 1 mole

SO₂: 1 mole

HCl: 2 mole

Being:

S: 32 g/mole

O: 16 g/mole

Cl: 35.45 g/mole

H: 1 g/mole

the molar mass of the compounds participating in the reaction is:

SOCl₂: 32 g/mole + 16 g/mole + 2*35.45 g/mole= 118.9 g/mole

H₂O: 2*1 g/mole + 16 g/mole= 18 g/mole

SO₂: 32 g/mole + 2*16 g/mole= 64 g/mole

HCl: 1 g/mole + 35.45 g/mole= 36.45 g/mole

Then, by stoichiometry of the reaction, the following amounts of mass react and are produced:

SOCl₂: 1 mole* 118.9 g/mole= 118.9 g

H₂O: 1 mole* 18 g/mole= 18 g

SO₂: 1 mole* 64 g/mole= 64 g

HCl: 2 mole* 36.45 g/mole= 72.9 g

Then the following rule of three can be applied: if by stoichiometry of the reaction 118.9 grams of SOCl₂ produce 2 moles of HCl, 0.226 grams of SOCl₂ how many moles of HCl do they produce?

moles of HCl= 3.80*10⁻³

3.80*10⁻³ moles of HCl can be produced from 0.226 g of SOCl₂

because of its milk-like appearance. ... Since the dissociation of this small amount of dissolved magnesium hydroxide is complete, magnesium hydroxide is considered a strong electrolyte. Its low solubility makes it a weak base.