Write the molecular, ionic, and net ionic equations for the reaction of Sr(NO3)2(aq) and Li2SO4(aq).

Answer:

Average weather conditions of a region over the long term

Explanation:

Climate is the long-term average of weather, typically averaged over a period of 30 years. More rigorously, it denotes the mean and variability of meteorological variables over a time spanning from months to millions of years.

Answer:

part of the skeleton that supports the structure of face and forms a cavity from bone.

Hope it help u.

Explanation:

hope it is helpful to you

Answer:

B on EDGE 2021

Explanation:

THE ANSWER ABOVE IS INCORRECT brainliest pls?

Given the solution containing HCl, the solution is likely to have a low pH and a high poH

This is simply a measure of the acidity / alkalinity of a solution.

The pH measures the hydrogen ion concentration while the pOH measures the hydroxide ion concentration

The pH scale is a scale that gives an understanding of the variation of the acidity / alkalinity of a solution.

The scale ranges from 0 to 14 indicating:

However, it should be noted that as the pH increases, pOH decreases and as pH decreases, pOH increases.

Considering the question given above, the solution (HCl) is acidic.

Therefore, the solution will have a low pH and a high pOH

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Answer:

C < N < O.

Explanation:

Hello!

In this case, since the electron affinity is a periodic property of elements indicating how likely is for the element to gain one electron, which is also related to the electronegativity, we can notice that fluorine is the most electronegative element or also, the element with the highest electron affinity whereas francium is the least electronegative element.

Therefore, we can infer that the electron affinity or electronegativity, increases from left to right and from bottom to top in the periodic table, it means that among carbon, nitrogen and oxygen, the element with the greatest electron affinity is oxygen, then nitrogen and finally carbon with the least one, thus answer is C < N < O.

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Answer:

where is the answers at

Explanation:

Answer:

Option B.

Explanation:

Obviously, a cleaning agent companies is going to be a producer of cleaning agents which are chemical substance which are used for the main purpose of removing unwanted particles (dirt).

For this particular Question, option ''B'' is correct because upon the addition of H2O, there will surely be changes in the numbers of ions in the cleaning agents.

From the Question above, we have that the cleaning agents has pH which is too high, therefore in order to reduce the pH of the cleaning agents, water will be used to mix the product or cleaning agents. Upon the addition of water there will be decrease in OH^-.

Answer: They can find fossils and use a technology called radiocarbon to find the age of the fossil and then do an approximate about the age of the rock.

Explanation:

Temperature to reach the pressure : 2657 °C

Gay Lussac's Law  

When the volume is not changed, the gas pressure is proportional to its absolute temperature  

[tex]\tt \dfrac{P_1}{T_1}=\dfrac{P_2}{T_2}[/tex]

P₁=605 torr

T₁=20 + 273 = 293 K

P₂=6050 torr

[tex]\tt T_2=\dfrac{T_i\times P_2}{P_1}\\\\T_2=\dfrac{293\times 6050}{605}\\\\T_2=2930~K=2657~^oC[/tex]

Answer:

1.396 x [tex]10^{7}[/tex] yards

Explanation:

The Earth has a spherical shape, thus its diameter is a straight line that passes through its center; dividing into two equal halves.

Given that the diameter of the earth is 1.276 x [tex]10^{7}[/tex] meters.

But,

1 meter = 1.09361 yards

So that,

1.276 x [tex]10^{7}[/tex] meters = x

⇒ x = 1.276 x [tex]10^{7}[/tex] x 1.09361

               = 1.39545 x [tex]10^{7}[/tex] yards

The diameter of the earth is 1.396 x [tex]10^{7}[/tex] yards.

Answer:

100°C

Explanation:

The higher temperature causes the molecules to increase in speed, and kinetic energy is greatest in the gas phase.

Answer:

The answer to 12 is Indium... you should be able to figure out the rest from there with help from the internet since i've given you the element

Explanation:

I would usually do it but I got a ton of hw

Answer:

No, IR should not soely be used to identify molecules

Explanation:

IR is a method that identifies the functional groups in a molecule by deducing the frequency of stretching and vibration of bonds. Each peculiar type of bond has a frequency for the vibration of each bond represented on the IR spectrum.

However, one method is never enough to identify a compound. A combination of methods must always be used to clear up ambiguities arising from overlapping IR frequencies. Also,  interpretation of the nuanced peaks of the fingerprint region in IR spectra is quite challenging and only gives a fair idea of the functional groups present in the compound.

Therefore other methods such as NMR, UV-VISIBLE etc should also be involved in the identification of compounds.

Answer:

1g or 10^-3kg

Explanation:

as you know , the density =mass \volume

so  you have the mass from the number it self

Answer:

A polar covalent bond

Explanation:

When the absolute value of the difference in electronegativity of two bonded atoms is between 0.4 and 1.8 they tend to form polar covalent bonds.

Answer:

D

Explanation:

Radiation - radiation is transfer of energy by electromagnetic waves

The sun warms the earth through the transfer of energy by electromagnetic waves. Therefore, option (D) is correct.

Electromagnetic radiation contains waves of the electromagnetic field, which propagate through space and carry radiant energy. It includes microwaves, radio waves, infrared, (visible) light, UV, X-rays, and gamma rays.

Electromagnetic radiation posses of electromagnetic waves, which oscillate with the electric and magnetic fields. Electromagnetic waves are created due to periodic changes in the electric field or magnetic field.

Depending on the periodic change that happens and the power produced, different wavelengths of the electromagnetic spectrum are produced. The effects of electromagnetic radiation on chemical compounds and biological organisms depend on the power of the radiation and its frequency.  

In order of increasing frequency and decreasing wavelength, these waves are arranged in the electromagnetic spectrum. The transfer of electromagnetic waves from the Sun to the earth, the energy of these waves warms the earth.

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Answer:

0.54M of Ba(OH)2

Explanation:

When Ba(OH)2 reacts with HCl, BaCl2 and H2O are produced as follows:

Ba(OH)2 + 2HCl → BaCl2 + 2H2O

The remanent hydroxide ion is because not all Ba(OH)2 reacts. Thus, we need to find moles of Ba(OH)2 that doesn't react and moles of Ba(OH)2 that reacts. The ratio between total moles and volume of the Ba(OH)2 solution = 0.050L is the molarity of the original solution

Moles of Ba(OH)2 that doesn't react:

50mL + 150mL = 0.200L * (0.12 mol OH- / L) = 0.024 moles OH-

2 moles of OH- are in 1 mole of Ba(OH)2:

0.024 moles OH- * (1mol Ba(OH)2 / 2 mol OH-) = 0.012 moles Ba(OH)2

Moles of Ba(OH)2 that react:

0.150L * (0.20mol / L) = 0.030 moles HCl

2 moles of HCl react per mole of Ba(OH)2:

0.030 moles HCl * (1mol Ba(OH)2 / 2 mol HCl) = 0.015 moles Ba(OH)2

Total moles:

0.012mol + 0.015mol = 0.027mol Ba(OH)2 in 50mL

0.027mol Ba(OH)2 / 0.0500L =

0.54M of Ba(OH)2

When sodium is present, it is challenging to distinguish potassium because sodium causes the flame to have the most vivid and lasting color.

Sodium should be absent if we wish to distinguish the coloration of other metals. In the absence of sodium, potassium tints the flame violet. However, we were able to identify the existence of both ions using a spectroscope. Only a few brightly colored lines in the spectrum can be detected when the light produced by an element's atoms is observed in a spectroscope.

A given excited atom may only undergo energy changes of specific fixed, definite amounts, as evidenced by the fact that it only emits radiation at a limited set of fixed wavelengths.

These ions' emission spectra can be seen to consist of a number of lines when we use a spectroscope to look at them. Each metal's series is distinct. In contrast to sodium, potassium has a distinctive set of lines. Thus, both are distinguishable from one another.

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Answer: covalent bond is the force of attraction that holds together two atoms that share a pair of valence electrons. Covalent bonds form only between atoms of nonmetals. The two atoms that are held together in a covalent bond may be atoms of the same element or different elements.

Explanation:

Answer:

top right and bottom left

Explanation:

just took test plato/edmentum

Explanation:

Generally, temperature increases the rate of any chemical reaction considerably.

In a dissolution process, the solute is solvated in the solvent. Solutes are usually the solids or liquids being dissolved in the solution.

Answer:  The volume occupied at an altitude of 20.0 km is 34.5289 L

Explanation:

Boyle's Law: This law states that pressure is inversely proportional to the volume of the gas at constant temperature and number of moles.

[tex]P\propto \frac{1}{V}[/tex]     (At constant temperature and number of moles)

where,

[tex]P_1[/tex] = initial pressure of gas = 101.325 kPa ( sea level)

[tex]P_2[/tex] = final pressure of gas = 10 kPa

[tex]V_1[/tex] = initial volume of gas = 3.40774 L

[tex]V_2[/tex] = final volume of gas = ?

Now put all the given values in the above equation, we get the final pressure of gas.

[tex]101.325\times 3.40774=10\times V_2[/tex]

[tex]V_2=34.5289L[/tex]

Therefore, the volume occupied at an altitude of 20.0 km is 34.5289 L

Answer:

pH = 4.5, concentration = 0.045 M.

pH = 6.5, concentration = 0.175 M.

Explanation:

The ka for the can be calculated by using the formula below;

Ka = 10^-pka = 10^-5.960 = 1.1 × 10^-6

The concentration of hydrogen ion at pH = 4.50 can be calculated as given below;

{H^+ } = 10^-4.50 = 3.2 × 10^-5 M.

(NB=> 10 in this regards means the inverse of log).

The next step is to determine the distribution coefficient which can be calculated by using the formula below;

distribution coefficient = (partition coefficient) × ka / ka + ( concentration of Hydrogen ion,H^+).

distribution coefficient =( 5 × 1.1 × 10^-6 ) / 1.1 × 10^-6 + 3.2 × 10^-5 M. = 5.5 × 10^-6/ 3.2 = 0.00000171875

The fraction remaining from the compound = 45.0 mL / 45.0 mL + (0.00000171875 × 125).

= 0.999995.

Thus, the concentration at pH = 4.5 = 0.999995 × 0.0450 M = 0.045 M

(B). pH=6.50, thus the concentration of Hydrogen ion = 10^-6.5 = 3.2 × 10^-7 M.

distribution coefficient = (partition coefficient) × ka / ka + ( concentration of Hydrogen ion,H^+).

distribution coefficient = (5 × 1.1 × 10^-6)/ 1.1 × 10^-6 + 3.2 × 10^-7 M).

distribution coefficient = 5.5 × 10^-6/ 1.42 × 10^-6 = 3.9.

Therefore, the concentration = 3.9 × 0.0450 M = 0.175 M.

Answer:

belonging or relating to a particular area or neighborhood, typically exclusively so

Explanation:

Answer:

Aspirin which is also considered as

NSAID

Explanation:

they are prescribed drugs

Among the given examples, aspirin is an example of an analgesic. The correct answer is option a.

Analgesics are a class of drugs that are used to relieve pain.

Aspirin is a non-steroidal anti-inflammatory drug (NSAID) that works by inhibiting the production of prostaglandins, which are chemicals in the body that cause pain and inflammation.

Therefore, the example of an analgesic is aspirin that is commonly used to relieve pain. Option a is the correct answer.

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Answer:

As tectonic plates slowly move away from each other, heat from the mantle's convection currents makes the crust more plastic and less dense. The less-dense material rises, often forming a mountain or elevated area of the seafloor.

Answer: Atoms of carbon and hydrogen

Explanation: