17.5 mL of a 0.1050 M Na2CO3 solution is added to 46.0 mL of 0.1250 M NaCl. What is the concentration of Na in the final solution

Answer:

false i am pretty sure because dead flowers.

Answer:

Explanation:

from the way the trees look, i would say A: Wind from the sky, it seems B: Clouds and in the distance C:Precipitation(rain)

Answer: The total volume of the sun is 1.4 x 10 27cubic meters. About 1.3 million Earths could fit inside the sun. The mass of the sun is 1.989 x 10 30 kilograms, about 333,000 times the mass of the Earth.

Explanation: So if you divide the volume of the Sun by the volume of the Earth, you get 1,300,000.

Answer:

False

Explanation:

Alkali metals are found in group 1 of the periodic table. They only have one valence electron. The easiest way for them to complete an octet is to lose an electron. Halogens, on the other hand, have seven valence electrons and gain an electron to complete octet.

Answer:

D. > 7

Explanation:

Benzoic acid, HX, is a weak acid that reacts with OH- as follows:

HX + OH- → X- + H2O

Where X- is produced, the conjugate base of benzoic acid.

As benzoic acid is a weak acid, benzoate ion is a strong base. A strong base has pH > 7. Right option is:

D. > 7

Answer: The p orbital can hold up to six electrons. We'll put six in the 2p orbital and then put the remaining electron in the 3s. Therefore the sodium electron configuration will be 1s22s22p63s1.

Explanation:

Water-soluble vitamins are not found in a chylomicron.

Chylomicrons are massive triglyceride-wealthy lipoproteins produced in enterocytes from nutritional lipids—specifically, fatty acids, and ldl cholesterol. Chylomicrons are composed of a chief imperative lipid middle that is composed often of triglycerides, however like different lipoproteins, they bring esterified cholesterol and phospholipids.

Chylomicron catabolism is thought to be initiated by the enzyme lipoprotein lipase (triacylglycerol-protein acyl hydrolase, EC three.1. 1.34). Chylomicron remnants, produced with the aid of lipolysis, are hastily taken up by way of the liver through an apolipoprotein E (apoE)-mediated, receptor-dependent system.

Triglycerides are emulsified by using bile and hydrolyzed through the enzyme lipase, ensuing in an aggregate of fatty acids and monoglycerides.

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The volume of water that must be add is 20 mL. Volume of water that must add is new volume after dilution minus initial volume.

As per data given:

Initial volume (V1) = 40 mL = 0.040 L

Initial molarity(C1) = 9.0 M

New molarity (C2)= 6.0 M

As we want to know to the new volume of water(V2). We have to use dilution formula where the formula is C1 x V1 = C2 x V2. So, the calculation would be:

9.0 x 0.040 = 6.0 x V2

V2 = 0.06 L

V2 = 60 mL

Since the addition water is the difference between V2 and V1:

Volume add = V2 -V1

Volume add = 60 - 40

Volume add = 20 mL

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Answer:

30 cm³.

Explanation:

We'll begin by writing the balanced equation for the reaction. This is given below:

O2 + 2H2 —> 2H2O

From the balanced equation above, we can say that:

1 cm³ of O2 reacted with 2 cm³ of H2 to produce 2 cm³ of H2O.

Next, we shall determine the excess reactant.

This can be obtained as follow:

From the balanced equation above,

1 cm³ of O2 reacted with 2 cm³ of H2.

Therefore, 10 cm³ of O2 will react with = (10 × 2)/1 = 10 × 2 = 20 cm³ of H2.

From the calculations made above, we can see that only 20 cm³ out of 50 cm³ of H2 given is needed to react completely with 10 cm³ of O2.

Therefore, O2 is the limiting reactant and H2 is the excess reactant (non limiting reactant).

Finally, we shall determine the volume of the non limiting reactant (excess react) that is remaining after the reaction.

This can be obtained as follow:

Volume of non limiting reactant (H2) = 50 cm³

Volume of non limiting reactant (H2) that reacted = 20 cm³

Volume of non limiting reactant (H2) remaining =.?

Volume of non limiting reactant (H2) remaining = (Volume of non limiting reactant) – (Volume of non limiting reactant that reacted)

Volume of non limiting reactant (H2) remaining = 50 – 20

= 30 cm³

Therefore, the Volume of non limiting reactant (H2) that remains after the reaction is 30 cm³

Answer:

6.2 Miles!

Explanation:

Answer:

Alike

Explanation:

Answer:

The first law of thermodynamics doesn't actually specify that matter can neither be created nor destroyed So yes we can create matter because matter is every where buildings ,structures etc. So the answer is yes!

Explanation:

                         Hope this helped!ヾ(•ω•`)o❤

Answer:

The percent of n would be 7.10

Explanation:

Answer:

A gas occupies a volume of 250 mL at a pressure of 76 kPa and a temperature of 298 K.

Explanation:

Charles's law states that for a given sum of gas at constant pressure, as the temperature increases, the volume of the gas increases and as the temperature decreases, the volume of the gas decreases. This mathematical law expresses that the quotient that exists between the volume and the temperature will always have the same value:

\(\frac{V}{T} =k\)

Gay-Lussac's law says that when there is a constant volume, as the temperature increases, the pressure of the gas increases. And when the temperature is decreased, the pressure of the gas decreases. This law mathematically says that the quotient between pressure and temperature is constant:

\(\frac{P}{T} =k\)

Finally, Boyle's law says that the volume occupied by a certain gaseous mass at constant temperature is inversely proportional to the pressure. This law is expressed mathematically as

P * V = k

Combined law equation is the combination of three gas laws called Boyle's, Charlie's and Gay-Lusac's law:

\(\frac{P*V}{T} =k\)

Analyzing an initial state 1 and a final state 2, it is satisfied:

\(\frac{P1*V1}{T1} =\frac{P2*V2}{T2}\)

In this case:

Replacing:

\(\frac{38 kPa*500 mL}{298 K} =\frac{76 kPa*250 mL}{T2}\)

Solving:

\(T2*\frac{38 kPa*500 mL}{298 K} =76 kPa*250 mL\)

\(T2=\frac{76 kPa*250 mL*298 K}{38 kPa*500 mL}\)

T2= 298 K

A gas occupies a volume of 250 mL at a pressure of 76 kPa and a temperature of 298 K.

He did not meet his goal because 25% is lesser than 30% and he needs 30% or more Osvoldo's objective was not achieved.

If he had 220 grams of carbohydrates today, and 55 of those grams came from whole grains, then the proportion of his total carbohydrates that were made up of whole grains was.

It is assumed that Osvoldo aims to consume at least 30 percent of his daily grams of carbohydrates from whole grains.

He consumed 220 grams of carbohydrates today.

55 grams of whole-grain carbohydrates

We must ascertain whether Osvoldo achieved his objective or not.

We must determine if 55 is at least 30% of 220.

He only obtains 25% of his daily grams of carbohydrates from whole grains because 55 is 25% of 220.

55/220 × 100 = 25%

he has a goal of getting at least 30% percent of his grams of carbohydrates each day from whole grains, Hence, Osvoldo did not meet his goal.

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Answer:

Ca(NO3)2 + 2 NaCl = 2 NaNO3 + CaCl2

Explanation:

On the left you have an original balance of Ca - 1, N - 2, O - 6, Na - 1, and Cl - 2, and on the right you have a balance of Ca - 1, N - 1, O - 3, Na - 1, Cl - 2.

Ca - 1 Ca - 1

N - 2 N - 1

O - 6 O - 3

Na - 1 Na - 1

Cl - 1 Cl - 2

In order to balance these, you'll have to make both sides equal. To get the N on the right to be equal to the N on the left, you'll have to multiply NaNO3 by 2, thus making it 2NaNO3. By doing this, you will offset the balance of both Na and O.

Ca - 1 Ca - 1

N - 2 N - 2

O - 6 O - 6

Na - 1 Na - 2

Cl - 1 Cl - 2

To balance the rest of the equation, you'll have to multiply both Na and Cl by 2. This will change NaCl to 2NaCl, making the balance look like this:

Ca - 1 Ca - 1

N - 2 N - 2

O - 6 O - 6

Na - 2 Na - 2

Cl - 2 Cl - 2

You will now be left with your final equation Ca(NO3)2 + 2 NaCl = 2 NaNO3 + CaCl2.

Answer:

8;1

Explanation:

eight nitrogen and one oxygen

Answer:

yes

Explanation:

Two covalent bonds form between the two oxygen atoms because oxygen requires two shared electrons to fill its outermost shell.

Diagram C shows the repeating groups of atoms that make up the samples Damian mixed together.

An atom is a particle made up of a core of protons and neutrons encircled by an electron cloud. The atom is the fundamental particle of the chemical elements, and the chemical elements are differentiated by the amount of protons in their atoms. For example, any element with 11 protons is sodium, and any atom with 29 protons is copper. The element's isotope is defined by the amount of protons.

Atoms are incredibly tiny, measuring approximately 100 picometers across. A human strand is approximately one million carbon atoms thick. Because this is smaller than the lowest visible light wavelength, people cannot see atoms using normal lenses.

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Answer:

Molecules that contain dipoles are called polar molecules and are very abundant in nature. For example, a water molecule (H2O) has a large permanent electric dipole moment.

so it is (D). H2O

Explanation:

Based on the nature of intermolecular forces, the molecule that can have a temporary dipole is nitrogen gas, N2.

Temporary dipoles are created when electrons revolving around the nucleus, spontaneously come into close proximity resulting in an uneven distribution of electrons, thereby creating a temporary dipole due to unbalanced charges.

Temporary dipoles can initiate weak intermolecular attraction between neighboring molecules such as van der Waal's forces.

Temporary dipoles can occur in non-polar molecules such as nitrogen gas resulting in the ability of nitrogen to be liquefied.

Therefore, the molecule that can have a temporary dipole is nitrogen gas, N2.

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When considering the precise mass, the particle has the greatest mass is the neutrons.

The Neutron is the heaviest among all the subatomic particles with the  mass of the  1.0087 amu, and the proton has the mass of the 1.0073 amu. The Positron and the electron both have the mass of the 0.00055 amu.

The difference in between the mass  of the neutron and the proton is very small. This is the reason that they are both have the relative mass of the one atomic mass unit. The mass of the neutron in the grams  is the  1.674 × 10⁻²⁴ grams.

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Metallic Minerals will be minerals in which metal components are available in their crude structure. Non-metallic minerals don't contain any metal substances in them. At the point when metallic minerals are dissolved another item is shaped. Non-metallic minerals are frequently discovered installed in youthful overlay mountains and sedimentary rocks.

Answer: C. Silicon

A solid-state rectifier is primarily made of silicon, which is a semiconductor material. Silicon is used in the manufacturing of rectifiers because it has unique electrical properties that make it ideal for this purpose. When impurities, such as boron or phosphorus, are added to silicon, it becomes a better conductor of electricity in certain areas, creating a p-n junction. This p-n junction is the basis of the diode, which is the fundamental building block of the rectifier. Therefore, silicon is the primary material used in the construction of solid-state rectifiers.

The most commonly used substance in the production of solid-state rectifiers is (D) Silicon.

A solid-state rectifier is an electronic device that is primarily used to convert AC (alternating current) to DC (direct current) by using semiconductor materials.

Silicon is a widely used semiconductor material that has excellent electrical properties. It is highly conductive and has a stable electrical response. It is readily available and affordable. The process of manufacturing solid-state rectifiers involves doping silicon with impurities to create a PN junction. The PN junction is a critical component of a solid-state rectifier, as it allows the device to act as a one-way valve that only permits the flow of current in one direction.

Iron and aluminum are not commonly used in the production of solid-state rectifiers because they do not have the electrical properties required to function as semiconductor materials. Arsenic is a semiconductor material that is sometimes used in the production of solid-state rectifiers, but it is not as widely used as silicon due to its high toxicity.

In conclusion, solid-state rectifiers are primarily made of silicon, which is an affordable, widely available, and highly conductive semiconductor material that is used to create the PN junction required for the device to function as a one-way valve.

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If an IMF member country were to find itself in a severe balance of payments crisis that threatened its financial stability, the IMF would most likely provide financial assistance and support to the country.

The IMF's primary mandate is to promote global monetary cooperation, secure financial stability, facilitate international trade, and foster sustainable economic growth. In the event of a severe balance of payments crisis, the IMF would typically step in to assist member countries facing financial difficulties. The specific actions taken by the IMF can vary depending on the circumstances and the country's needs. However, some common measures the IMF may undertake include: Providing financial assistance in the form of loans or credit lines to help the country stabilize its economy and address the balance of payments crisis. Requiring the country to implement policy reforms and structural adjustments aimed at improving fiscal and monetary policies, enhancing economic governance, promoting market liberalization, and addressing underlying imbalances.

Monitoring and evaluating the country's progress in implementing the recommended reforms and ensuring that the financial assistance is utilized effectively. Overall, the IMF's role in such situations is to provide financial resources and policy advice to help member countries overcome severe balance of payments crises and restore financial stability.

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Answer:

10

Explanation:

the volume of C2H2 reacted with 25 moles of O2

9.85L of ethyne is needed to react with 25 L of oxygen for the reaction at STP.

The mole is an amount unit similar to familiar units like pair, dozen, gross, etc. It provides a specific measure of the number of atoms or molecules in a bulk sample of matter.

A mole is defined as the amount of substance containing the same number of atoms, molecules, ions, etc. as the number of atoms in a sample of pure 12C weighing exactly 12 g.

Given,

Volume of oxygen = 25 L

We know that 1 mole of a gas occupies 22.4 L of volume

So, 25L is occupied by 1.11 moles of oxygen.

From the reaction, 5 moles of oxygen needs 2 moles of ethyne.

1 mole of oxygen would need 2/5 moles of ethyne

Thus, moles of ethyne needed = ( 2 / 5) × 1.11

= 0.44 moles

Volume of ethyne needed = 0.44 × 22.4 = 9.85 L

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Answer:

The answer is "\(1.4 \ \bold{ billion-years}\)".

Explanation:

Using formula:

\(\to N_{Now} = N_{orige}e^{\lambda t} \\\\\)

\(\to\) 1 U atom produces 1 Pb atom after decay.

\(\to\) U's original numbers are now the sum of U counts and Pb counts.

 \(\to N_U=(N_U+N_{pb})e^{\lambda Ut}\)

\(\to 1 = (1+3) \ exp[(\frac{-\ln(2)}{t_{(half)}} \times t ]\\\\\to t = [\frac{\ln(4)}{\ln(2)}] \times t_{(half)}\)

      \(= 14 \times 10^8 \ \ years\\\\=1.4 \ billion \ \ years\)

One should administer 2 tablets of Synthroid 0.125 mg to achieve a dosage of 250 mcg (0.25 mg) per day.

To determine how many tablets of Synthroid 0.125 mg are needed to administer a dosage of Synthroid 250 mcg (micrograms) per day, we can convert the units and calculate the quantity required.

Given:

Synthroid dosage: 250 mcg (micrograms) per day

Synthroid tablet strength: 0.125 mg (milligrams)

To convert micrograms to milligrams, we divide by 1000:

250 mcg = 250/1000 mg = 0.25 mg

Now, we need to determine how many tablets of 0.125 mg are needed to achieve a dosage of 0.25 mg:

0.25 mg / 0.125 mg per tablet = 2 tablets

Therefore, you should administer 2 tablets of Synthroid 0.125 mg to achieve a dosage of 250 mcg (0.25 mg) per day.

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