Your teacher has just asked you to measure out 1.24 x 1023 molecules of sodium chloride, Sodium chloride has a chemical formula of Naci. Using a Periodic Table,
determine how many grams of sodium chloride you should measure out.
A 12.08
2.12 x 1028
284 g
D 72.5 x 1021 g

Answer: write the solubility equilibrium and the solubility-product constant expression for the slightly soluble salt CaF2 CaF2 (s) <---> Ca2+ (aq) + 2F- (aq) Ksp=[Ca2+][F-]2.

Explanation:

Answer:

70

Explanation:

The atomic number stands for the number of protons.

mass number stands for number of neutrons and protons.

30 neutrons + 40 protons = mass number of 70

Hope this helps!

Answer:

Phenotype

Explanation:

The observable physical characteristics of an organism, as determined by both genetic makeup and environmental influences.

The question is asking about the observable physical characteristics of organisms.

We can eliminate options B and C because they don't make much sense. An organelle is a structure in a cell which conducts cellular functions, and the morphology of an organism is basically the anatomy and physiology of the organism, which isn't quite what we're looking for.

Keeping this in mind, here is some information on prefixes:

geno - relating to genes

pheno - relating to what's observable

The second one sounds a lot like what we're looking for, and just in case, the definition of phenotype is the set of observable characteristics of an individual resulting from the interaction of its genotype with the environment.

Therefore your answer is: A. phenotypes

answer:

black

Explanation:

black is visible

Answer:       freezing

Explanation:

when the atoms or molecules in a solid or liquid are moving slower and closer together, it is called brrrrrrrrr freezinf

Answer:

I'm sure it's covalent bond hope this helps

Answer:

The answer is D.

Explanation:

Isometries means both x and y will change with same scale factor not dissimilar factors

#1

Factor is -2

#b

#c

#d

Factor is 3

#e

No

Answer:

Sodium chloride is an ionic compound which makes it stronger and have a higher melting and boiling point. Candle wax is a covalent compound so it has a low melting point.

Explanation:

Answer:

Nitrogen dioxide gas

Explanation:

Answer:

Photosynthesis process

Explanation:

Photosynthesis removes carbon dioxide naturally — and trees are especially good at storing carbon removed from the atmosphere by photosynthesis.

d position

position is the reference for the points of the object

Answer:

B) Oxygen

Explanation:

i just took the test.

Any species that contain negative charge over it called anion. Out of sodium, oxygen, argon and calcium, oxygen is the only element that can form anion. So option B is correct option.

Non metals are the element that have property to gain electron.  When any element gain electron then element attain negative charge  and  that element is called anion.

In our question sodium, argon belongs to metals category and these lie on the left side of the periodic table. Metals are meant to release electron and hence become cation.

Argon is non metal but it is a noble gas which has property to not to react as its octet is complete. Thus the only element that is non metal here is Oxygen that forms anion. Its oxidation state is -2. Thus option b is correct option

To learn more about non metals, here:

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Answer & Explanation:

For the water to H2 and O2 problem:

1) Reactant is H20, it is to the left of the arrow.

2) Products are H2 (gas) and O2 (gas) because it is to the right and what is created.

For the CO2 + water -> Glucose + Oxygen problem:

1) Reactant is CO2 and H2O, it is to the left of the arrow and what is being changed.

2) Products are C6H12O6 (glucose) and O2 (gas) because it is to the right and what is created.

Answer:

The substance (or substances) initially involved in a chemical reaction are called reactants or reagents.

Explanation:

Answer:

The chemical or substances used to start a reaction are called reactants.

Answer:

They all have the same density

Explanation:

Density is an intensive physical property, meaning that as long as the chemical formula is the same, that specific intensive physical property will be the same. For example. One kilogram of feathers has the same mass as one kilogram of bricks. Why? They both have a mass of one kilogram.

It's the same thing here. Since all the objects are (assumed to be) made up of 100% gold, they would all have the same density regardless of the mass. For extra points, say the density of each object is [tex]19 \frac{g}{cm^3}[/tex].

Answerthey all have the same density Explanation:

Answer:

Explanation:

How many cm of a solution of 0.100 mol dm NaOH are required to completely  neutralize  25.0 cm of 0.250 mol dm H3PO4?.

a) Write a balanced equation for the reaction NaOH to neutralize (4 marks

?. ) 25.0 cm of 0.250 mol dm H3PO4

H3PO4 + 3NaOH----------> Na3PO4 +3 H2O

b) How many moles of H3PO4 need to be neutralized? (1 marks)

25.0 cm3 of 0.250 mol dm3 H3PO4: 1 liter has 0.25 moles. 100 ml has 0.025 moles 25 ml has o.025/4 molea or 0.00625 moles)

c How many moles of NaOH are needed to neutralize the H3PO4? (1 marks)

for every moles of H3PO4, WE NEED 3 MOLES OF NaOH.  FOR 0.00625 MOLES WE NEED 3X 0.00625 =0.01875 MOLES OF NaOH

d) How many cm3 of 0.100 mol /l NaOH contain the moles in question 5(©) above? (1 marks)

1 L CONTAINS 0.100 Moles

100 ml contains 0.010Moles

we need 187.5 ml since (187.5 X 0.100)/1000=0.01875

Explanation:

Archaism

Things on Earth would be unexplainable

Answer:

thank you for the update on

Answer:

es la dos

Explanation:

Answer:

Explanation:

The density of a substance can be found by using the formula

[tex]density = \frac{mass}{volume} \\[/tex]

From the question

mass = 500 g

volume = 67 mL

We have

[tex]density = \frac{500}{67} \\ = 7.462686[/tex]

We have the final answer as

Hope this helps you

Answer:

True, Electrons are way smaller then protons

Explanation:

Answer:

41.9866

Explanation:

18.02x2.33

Hope this helps!

(please make me brainleist I need to level up)

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Air pressure is greatest near the surface of the Earth in the Troposphere .

Explanation:

135F is the temperature

The maximum temperature that a TCS dishes can hold is 135° C and 275 Fahrenheit.

Time/temperature control safety is a measurement of the temperature hold capacity of certain food, such as meat, fish, dairy, cream and custard products.

Thus, the maximum temperature that a TCS dishes can hold is 135° C and 275 Fahrenheit.

Learn more about TCS dishes

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In the formation of NH₃, -22 kcal are released when 6.0 moles of H₂ react.

Let's consider the thermochemical equation for the formation of ammonia.

3 H₂(g) + N₂(g) → 2 NH₃(g) ΔH = - 11 kcal

As we can see, 11 kcal are released when 3 moles of H₂ react. The heat released when 6.0 moles of H₂ react is:

[tex]6.0molH_2 \times \frac{(-11kcal)}{3molH_2} = -22kcal[/tex]

In the formation of NH₃, -22 kcal are released when 6.0 moles of H₂ react.

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Answer:

Total of 4 isomers of hepta-2,4-diene are given

Explanation:

pls mark brainliest

hope this helps  <3