4Na + O2 —> 2Na2O
In this chemical reaction, how many moles of Na2O will be produced if 2.90 moles of Na react completely? Express answer to three significant figures.

Answer:

The correct answer is D) 1.8 atm.

Explanation:

We use the ideal gas formula (PV= nRT). We first convert the unit of temperature in degrees Celsius to Kelvin. We use the ideal gas constant R = 0.082 l atm / K mol. We solve P:

273K =0°C ---> 33°C= 273 + 33=306 K

PV= nRT ----> P =(nRT)/ V

P= ( 1,5 mol x 0.082 l atm / K mol x 306 K)/ 21,0 L

P= 1,79 atm

Answer:the answer is A. They cannot show cause and effect

Answer:

A

Explanation: I just did this on edgenuiity and got it right

Answer:

25.34/5.98 =

4.23745819398

4.24

The significant figures is 4

The correct no of significant is 1

Explanation:

Significant figures are all numbers that add to the meaning of the overall value of the number. To prevent repeating figures that aren't significant, numbers are often rounded. One must be careful not to lose precision when rounding. Many times rounding numbers are for the purpose of simplicity only. Use the rounding calculator to assist in such problems.

0.027 moles of [tex]H_{2} S_{} 0_{4}[/tex] if  there are 1.64x[tex]10^{22}[/tex] molecules of [tex]H_{2} S_{} O_{4}[/tex]

Explanation:

Data given:

number of molecules of [tex]H_{2} S_{} 0_{4}[/tex] = 1.64 X [tex]10^{22}[/tex]

Atomic weight of the sulphuric acid = 98.07 grams/mole

We know that 1 mole of sulphuric acid has 6.022 x [tex]10^{23}[/tex] (Avagadro number) molecules.

so number of moles present in 1.64 X [tex]10^{22}[/tex]   molecules is given by:

so to get moles we will use

number of moles = [tex]\frac{number of molecules given}{avagadro number}[/tex]

number of moles = [tex]\frac{1.64 X 10^{22} }{6.022 X 10^{23} }[/tex]

number of moles = 0.027 moles

So, 1.64 X [tex]10^{22}[/tex]  molecules will be there in 0.027 moles of sulphuric acid.

Answer:the temperature of the gas

Explanation:

Answer:

You can dissolve about 1g of chloroform in a 100g of water; slightly less if the water is hot. This would not generally be considered 'soluble', but it's not entirely negligible either, depending on your purposes. chloroform is insoluble in water since it does not have any hydrophillic groups.

hope this helps you uwu

Final answer:

Interspecific competition happens when two species compete for the same limited resources, such as chipmunks and squirrels competing for sunflower seeds, with one species typically having a competitive advantage over the other.

Explanation:

Interspecific Competition

Competition between two species occurs when they are both striving for limited resources in the same area. An example of such competition might occur when chipmunks and squirrels compete for sunflower seeds in a garden. This is known as interspecific competition, which involves individuals of different species. In this competition, one of the species will typically be better adapted to the environment and will therefore have a competitive advantage over the other, resulting in greater reproductive success and survival. For instance, if squirrels are more effective at gathering sunflower seeds than chipmunks, the squirrels might have a higher survival rate, impacting the chipmunk population negatively.

In contrast, intraspecific competition occurs when members of the same species compete against each other for resources, such as two male deer clashing antlers to compete for mates. Both forms of competition are crucial factors in natural selection and can lead to the evolution of species-specific adaptations, also referred to as character displacement.

Answer:

the osmolarity of the 0.85% NaCl solution is approximately equal to 300 mosmol/L.

Explanation:

Molarity= number of moles/volume of the solution in liters

volume of the solution= 100 mL

1 L= 1000 mL

100 mL= 100/1000=0.1 L

molar mass of NaCl= 58.44 g/mol

number of moles= mass in gram/gram molecular mass

= 0.85/58.44

= 0.01455

molarity= number of moles/volume of the solution in liters

= 0.01455 / 0.1

= 0.1455 M

1 M= 1000 mM

so 0.1455 M = 0.1455 × 1000

= 145.5 mM

Osmolarity is the concentration of solutes in the solution.

NaCl dissociates to Na+ and Cl-

so osmolarity of 145.5 mM NaCl= 2 × 145.5

= 291 mosmol/L

Therefore, we conclude that the osmolarity of the 0.85% NaCl solution is approximately equal to 300 mosmol/L.

None of the given options are correct, and the correct answer is 174 K.

Explanation:

Mass of N = 41.6 g

Moles = [tex]$\frac{given mass}{molar mass}[/tex]

      = [tex]$\frac{41.6 g}{28 g/ mol}[/tex] = 1.5 moles

Pressure, P = 815 mm Hg = 1.07 atm

Volume, V = 20 L

R = gas constant = 0.08205 L atm mol⁻¹ K⁻¹

Temperature, T = ? K

We have to use the ideal gas equation,  

PV = nRT  

by rearranging the equation, so that the equation becomes,  

T = [tex]$\frac{PV}{nR}[/tex]

 Plugin the above values, we will get,  

T = [tex]$\frac{1.07 \times 20}{1.5 \times 0.08205}[/tex]

  = 174 K

So the temperature of the nitrogen gas is 174 K.

Final answer:

The temperature at which 41.6 grams of nitrogen exert a pressure of 815 mmHg in a 20.0L cylinder is calculated using the ideal gas law and is approximately 177 Kelvin.

Explanation:

To find the temperature at which 41.6 grams of nitrogen (N₂) will exert a pressure of 815 mmHg in a 20.0L cylinder, we need to use the ideal gas law, which is PV = nRT.

First, we convert the mass of nitrogen to moles. The molar mass of N₂ is 28.02 g/mol, so:

moles of N₂ = 41.6 g ÷ 28.02 g/mol = 1.484 moles of N₂

Using the ideal gas law:

R = 62.36 L mmHg / (mol·K)

We have:

PV = nRT

(815 mmHg)(20.0 L) = (1.484 mol)(62.36 L mmHg / mol·K)T

T = (815 mmHg × 20.0 L) / (1.484 mol × 62.36 L mmHg / mol·K)

T = 16370 mmHg·L / (92.48104 mol·L mmHg / mol·K)

T = 177 K (rounded to 3 significant figures)

The temperature at which 41.6 grams of nitrogen will exert a pressure of 815 mmHg in a 20.0L cylinder is approximately 177 Kelvin.

Answer:

a

Explanation:

Answer:

i am also positive it is A

Explanation:

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Answer:

2.49*10⁻¹² mol

Explanation:

Use Avogadro's Number for this equation (6.022*10²³).  Divide Avogrado's by the number of atoms you have to find moles.  You are answer should be 2.49*10⁻¹² mol.

Answer:

2.49*10⁻¹² mol

Explanation:

Use Avogadro's Number for this equation (6.022*10²³).  Divide Avogrado's by the number of atoms you have to find moles.  You are answer should be 2.49*10⁻¹² mol.

Plz let me know if it is correct.

Answer : One mole of an ideal gas  occupies a volume of 22.4  liters at STP.

Explanation :

As we know that 1 mole of substance occupies 22.4 liter volume of gas at STP conditions.

STP stands for standard temperature and pressure condition.

At STP, pressure is 1 atm and temperature is 273 K.

By using STP conditions, we get the volume of 22.47 liter.

Hnece, the one mole of an ideal gas  occupies a volume of 22.4  liters at STP.

Answer:

Your answer is Energy

Answer: The number of moles of [tex]CO_2[/tex] produced are, 0.287 moles.

Explanation : Given,

Mass of [tex]O_2[/tex] = 14.9 g

Molar mass of [tex]O_2[/tex] = 32 g/mol

First we have to calculate the moles of [tex]O_2[/tex]

[tex]\text{Moles of }O_2=\frac{\text{Given mass }O_2}{\text{Molar mass }O_2}[/tex]

[tex]\text{Moles of }O_2=\frac{14.9g}{32g/mol}=0.466mol[/tex]

Now we have to calculate the moles of [tex]CO_2[/tex]

The balanced chemical equation is:

[tex]2C_4H_{10}+13O_2\rightarrow 10H_2O+8CO_2[/tex]

From the reaction, we conclude that

As, 13 mole of [tex]O_2[/tex] react to give 8 moles of [tex]CO_2[/tex]

So, 0.466 mole of [tex]O_2[/tex] react to give [tex]\frac{8}{13}\times 0.466=0.287[/tex] mole of [tex]CO_2[/tex]

Therefore, the number of moles of [tex]CO_2[/tex] produced are, 0.287 moles.

Answer:

d

Explanation:

a) This is not an equation.

b) This is not an equation.

c) The reactant side has 1 Na and 2 O while the product side has 2 Na and 2 O, therefore it is not balanced

d) The reactant side has 4 H and 4 O and the product side has 4 H and 4 O, therefore it is balanced.

Answer:

The answer is c

Answer:

Zero

Explanation:a ionic compound consists of an equal number or positive and negative ions

Answer:

most acids contain something called   hydrogen atoms

Explanation:

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Answer:

B

Explanation:

Answer:

D.A tree

Explanation:

Answer : The hydroxide ion concentration of a solution is, [tex]3.8\times 10^{-7}M[/tex]

Explanation :

As we know that:

pH : It is defined as the negative logarithm of hydrogen ion concentration.

Mathematically,

[tex]pH=-\log [H^+][/tex]

Similarly,

pOH : It is defined as the negative logarithm of hydroxide ion concentration.

Mathematically,

[tex]pOH=-\log [OH^-][/tex]

Given:

pOH = 6.42

[tex]6.42=-\log [OH^-][/tex]

[tex][OH^-]=3.8\times 10^{-7}M[/tex]

Therefore, the hydroxide ion concentration of a solution is, [tex]3.8\times 10^{-7}M[/tex]

Answer:

i hate my life  PERIODT

Explanation:

WHY AM I HERE :/

The Stock System is used for naming ionic compounds with multiple oxidation states, different suffixes are used for polyatomic ionic compounds, the Greek Prefix System is used for binary covalent compounds, the prefix hydro- and the suffix-ic are used for binary acids, and binary ionic compounds are named after the two ions involved and use the suffix -ide.

1. Stock System: This is a method used to name ionic compounds with multiple oxidation states (d). For example, Iron (II) Chloride and Iron (III) Chloride.

2. Uses several different suffixes, depending on the types of ions involved: This points to a polyatomic ionic compound (c) which uses many suffixes such as -ate, -ite.

3. Greek Prefix System: This system is applied predominantly to name binary covalent compounds (a). For example, CO is called Carbon monoxide.

4. Contains the prefix hydro- and the suffix- ic: This rule is used to name binary acids (f). For instance, HCl in aqueous solution is called Hydrochloric acid.

5. Named after the two ions involved and uses the suffix -ide: This rule corresponds to the naming of binary ionic compounds (b). An example is NaCl, named Sodium Chloride.

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Answer:

The answer to your question is 0.6 M

Explanation:

Data

Molarity = ?

Volume = 450 ml

mass of NaCl = 15 g

Process

1.- Calculate the molar mass of NaCl

NaCl = 23 + 35.5 = 58.5 g

2.- Calculate the number of moles of NaCl

             58.5 g of NaCl ------------ 1mol

                 15 g of NaCl ------------   x

                         x = (15 x 1)/58.5

                         x = 0.26 moles

3.- Calculate the molarity

Molarity = moles/volume

-Substitutiion

Molarity = 0.26/0.45l

-Result

Molarity = 0.6 M

The molarity of a 450 mL solution containing 15g NaCl is calculated by converting the mass of NaCl to moles, converting the volume of the solution to liters, and applying the molarity formula. The molarity is thus found to be approximately 0.57 M.

To determine the molarity of the solution, we will need to apply the formula for molarity which is the number of moles of solute per liter of solution. Let's follow these steps:

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The two processes of carbon cycle are rapid carbon exchange and the long-term cycling of carbon.

The carbon cycle consists of two interconnected processes: rapid carbon exchange among living organisms and the long-term cycling of carbon through geologic processes.

In the first process, photosynthesis consumes carbon dioxide and produces oxygen, while aerobic respiration consumes oxygen and produces carbon dioxide. These two processes play an important role in the carbon cycle.

In the second process, carbon is stored for long periods in carbon reservoirs such as the atmosphere, bodies of liquid water, ocean sediment, soil, land sediments, and the Earth's interior.

Learn more about Two processes of the carbon cycle here:

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Answer:

A) States of matter

Explanation:

Hope this answer helps you

Final answer:

The kinetic molecular theory explains changes in states of matter, as it relates to the balance between particle motion (kinetic energy) and intermolecular forces influenced by temperature and pressure. Correct option is A.

Explanation:

The kinetic molecular theory explains changes in states of matter. It posits that matter is composed of tiny particles that are always in motion. The balance between the kinetic energy, which is related to the particle motion, and the intermolecular forces, which are attractive forces between particles, determines a substance's state. Temperature changes can alter the kinetic energy of particles, leading to state changes. Similarly, increasing pressure compacts molecules closer together, enhancing the intermolecular forces, and potentially causing a phase change.

Answer:

dihydrogen dioxide, hydrogen dioxide, hydrogen oxide, oxydol, peroxide, H2O

Answer:

Strawberry? Peppermint fudge? Bananarama? Any flavor you like! Learn how to make milkshakes from scratch with our step-by-step guide (plus pretty pictures).

Milkshakes are one of the most iconic American desserts. They’re refreshingly cool, slurp-ably sweet and come in pretty much any flavor you can imagine. But you don’t need to belly up to a vinyl booth to enjoy one. Making a milkshake from scratch is simple. If you’ve got a tub of ice cream on hand, you’re halfway there. Follow along as our test kitchen shows how to make the most flavorful milkshake.

In the mood for more classic sweets? These vintage dessert recipes are making a comeback.

How to Make the Best Milkshake Ever

Ingredients

1/3 cup milk.

You can use 2%, whole milk, or a blend of milk and half-and-half.

1-1/2 cups ice cream

Vanilla makes a good base for most shakes, or you can use a flavor like chocolate.

Delicious mix-ins!

Think a swirl of chocolate syrup, peanut butter, a chopped banana or other fruit, a handful of chocolate or butterscotch chips (we could go on and on…)

A blender, of course.

You can use a classic stand blender-or an immersion blender if you want to make it right in your glass.

Instructions

Step 1: Add the Milk, Ice Cream and Mix-Ins

Learn how to make a milkshake

TASTE OF HOME

Send your ingredients straight to the blender. For best results, put in your milk first. That will get the blender mixing quickly. Be sure to let your ice cream soften before scooping. If it’s too hard, you might end up having to add more milk, which thins the shake.

Test Kitchen tip: For an ultra-rich shake, use whole milk or milk with a little half-and-half cream. But never use heavy cream. If you send that through the blender, it’ll create little bits of butter.

We’re going to make a strawberry shake, so we’ll add 1/2 cup frozen unsweetened strawberries and 1 tablespoon strawberry preserves.

Editor’s tip: Remember that any ingredients you add will soon be pulverized in the blender. If you want to keep the size and shape of mix-ins like sprinkles, cherries or chocolate chips, it’s best to reserve as a garnish.

Step 2: Blend ’til smooth

Ice cream, milk and strawberries in a blender

It’s time to blend away. You’ll want to keep an eye on the consistency. This recipe creates a Goldilocks-style shake: not too firm and not too soft (runny). Of course, you can always customize it either way. Use less milk for a thicker, spoonable shake; more for a thinner, sippable one.

Be sure to check our our Test Kitchen’s recommendation for the best blender for your milkshake.

Step 3: Pour and Enjoy!

Strawberry milkshake in a glass with a green striped straw sticking out

Pour your milkshake into a chilled glass to serve. It tastes great straight-up or topped with a tower of whipped cream. Feeling fancy? Layer on toppings like chocolate syrup, sugary cereal or rainbow sprinkles. Once you’ve mastered the classic garnishes, try these crazy takes!

Answer:

Explanation:

4 large scoops of whatever flavor icecream you want

1/4 cup of milk

in the blender blend all together

pour into a glass

add whip cream sprinkles and a cherry

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Answer:

violet

Explanation:

Violet has the shortest wavelength at 380 nanometers

The correct option is 1 i.e, Violet light has the shortest wavelength in the visible spectrum at approximately 380-450 nm and carries the most energy. Red light has the longest wavelength, about 620-750 nm, and the least energy.

The visible light spectrum consists of a range of colors that our eyes perceive as different wavelengths. Of these colors, violet light has the shortest wavelength, approximately 380-450 nanometers (nm). Because it has the shortest wavelength, violet light also carries the most energy. On the other end of the spectrum, red light has the longest wavelength, about 620-750 nm, and thus carries the least energy. To remember the order of colors from longest to shortest wavelength, you can use the mnemonic ROY G BIV, which stands for Red, Orange, Yellow, Green, Blue, Indigo, and Violet.

Answer and Explanation:

The stage of a microscope is where the slide holding the specimen will be placed. Such a platform is required so that the viewer can more easily zoom into the organism and observe the slide through the microscope. Without the stage, it is very possible that the slide will be too far away to properly see anything.

Hope this helps!