what is the formula for the polyatomic ion and name the following compound
Sn(NO2)2​

Answer:

yes that is true........

Answer:

0.834 M.

Explanation:

Hello!

In this case, since this is a first-order reaction, we can infer that the half-life and the rate constant are related via:

\(t_{1/2}=\frac{ln(2)}{k}\)

Thus, we are able to compute the rate constant:

\(k=\frac{ln(2)}{t_{1/2}} =\frac{ln(2)}{32s}\\\\k=0.0217s^{-1}\)

Next, since we have the resulting concentration of the reactant and we need the initial one, we proceed as shown below with the rate law:

\(A=A_0exp(-kt)\\\\A_0=\frac{A}{exp(-kt)} \\\\A_0=\frac{0.062M}{exp(-0.0217s^{-1}*2.0min*\frac{60s}{1min} )}\\\\A_0=0.834M\)

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Answer:

Nuclear energy is energy in the core of an atom

Atoms themselves are made up of three particles called protons, neutrons, and electrons. An atom has a nucleus (or core) containing protons and neutrons, which is surrounded by electrons.

Explanation:

Brainliest please?

Explanation:

There are two types of change in matter: physical change and chemical change. A physical change affects a substance’s physical properties, and a chemical change affects its chemical properties. Many physical changes are reversible (such as heating and cooling), whereas chemical changes are often irreversible or only reversible with an additional chemical change.

The given changes are classified as follows:

The physical changes are:

(a) melting of sodium chloride.

(c) evaporation of alcohol.

(d) dissolving of sugar in water.

The chemical changes are:

(b) rusting of iron.

(e) decomposition of water.

(f) tarnishing of silver.

(g) non-reactivity of helium.

Answer:

whats CH3COOH please tell me so I can answer!

Answer:

3.5 × 10³ mmHg

Explanation:

Step 1: Given data

Step 2: Calculate the pressure (P) of the gas

If we assume an ideal behavior, we can calculate the pressure of the hydrogen gas using the ideal gas equation.

P × V = n × R × T

P = n × R × T/V

P = 5.0 mol × (62.4 mmHg.L/mol.K) × 500 KT/44.8 L = 3.5 × 10³ mmHg

The classification of the substances are as follows;

1) C

2) MOE

3) MOEAC

4) MOC

5) E

6) C

7) E

8) MOEAC

9) MOE

10) MOEAC

11) C

12) MOC

13) MOC

14) MOC

15) MOC

An element is a pure substance that cannot be broken down into simpler substances by chemical means. Elements are composed of only one type of atom, and they are listed on the periodic table. For example, oxygen, gold, and carbon are all elements.

A compound is a substance composed of two or more elements chemically combined in a fixed ratio. The properties of a compound are different from those of the elements that make it up. For example, water is a compound made up of two elements, hydrogen and oxygen, and has different properties than its constituent elements.

A mixture is a combination of two or more substances that are not chemically combined. Mixtures can be composed of elements, compounds, or both, and they can be separated by physical means.

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Answer:

atagcca

Explanation:

t goes with a, and c goes with g

atagcca matches with

ta tcggt

Answer:

C. 8 eV

Explanation:

In atoms, the energy of each level is quantised. That is one of the reasons why an electron can not exist between energy levels. Thus, when the electron absorbs energy of 8 ev, it get excited and jumps to energy level 2 which has the current value of energy of the electron.

Thus for the electron to move back to its initial energy level, it must emit the exact energy absorbed for its excitation. Therefore, the likely energy of the photon that will be emitted is 8 ev. This would make the electron to have energy that would make it to exist on energy level 1.

Answer:

salt and sand

Explanation:it is what it is

The name of the salt tells us that:

a) there is just one other element combined with the metal by looking at the suffix of the salt's name.

b) the presence of oxygen in a salt can be indicated by the name of the salt.

a) The name of a salt can tell us that there is just one other element combined with the metal by looking at the suffix of the salt's name. If the salt name ends in "-ide," it indicates that the salt is composed of a metal and a single non-metal element.
For example, sodium chloride (NaCl) and potassium bromide (KBr) are salts where the metal (sodium and potassium) is combined with a single non-metal element (chlorine and bromine, respectively). The "-ide" suffix suggests the presence of only one other element in the salt.

b) The presence of oxygen in a salt can be indicated by the name of the salt. If the salt name includes the element oxygen, it suggests that oxygen is present in the salt compound.
For example, sodium carbonate (Na₂CO₃) and calcium sulfate (CaSO₄) contain the element oxygen in their chemical formulas. The presence of oxygen in the salt is implied by the name and the combination of elements in the compound.

Therefore, the name of salt tells us that there is just one other element combined with the metal and there is oxygen present in the salt

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Answer:

b. K⁺.

f. CH3COO⁻.

Explanation:

Hello!

In this case, since the reaction:

\(2KF(aq) + Mg(CH_3COO)_2(aq)\rightarrow 2KCH_3COO(aq) + MgF_2(s)\)

Has a precipitation product which is magnesium fluoride, it is not ionized so the ionic equation is:

\(2K^+(aq)+F^-(aq) + Mg^{2+}(aq)+2CH_3COO^-(aq)\rightarrow 2K^++2CH_3COO^-(aq)(aq) + MgF_2(s)\)

Thus, since potassium and acetate ions are at both reactants and product sides, we infer they are the spectator ions; therefore the answer is b. K⁺ and f. CH3COO⁻.

Best regards!

The spectator ions are CH3COO– and K^+.

We must remember that spectator ions are the ions that do not undergo any change from left to right in the reaction equation.

The molecular reaction equation is;

2KF(aq) + Mg(CH3​COO)2(aq)----------​ >2KCH3​COO(aq) + MgF2​ (s)

Complete ionic reaction equation is;

2K^+(aq) + 2F^-(aq) + Mg^2+(aq) + 2CH3​COO^-(aq) ----> 2K^+(aq) +  2CH3​COO^-(aq) + MgF2​ (s)

Eliminating the spectator ions, we have the net ionic reaction equation;

Mg^2+(aq) + 2F^-(aq) ------> MgF2​ (s)

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Answer:

approximately 251.55 grams of AuCl3 would contain 5.0 x 10^23 molecules.

Answer:

A

Explanation:

1.0 L * 4 = 4L volume that the gas can occupy at 100 degree Celsius

Answer:

Check the explanation

Explanation:

Sample volume V= 10 mL/min x 17 h x 60 min/h / 1000 mL/L = 10.2 L

The concentration is increased

             10200 mL (sample volum) / 10 mL (eluted sample) = 1020 times.

57x10-9 M / 1020 = 5.6x10-12 M    

1.5 M HNO3 will contain ≤ 2ppm x (1.5M/15.7M ) ≤ 0.190 ppm ≤ 190 ppb

Ignoring this is reagent impurity and calculating for sea water

≤ 190 ppb /1020 = 0.186 ppb = 0.186 x 10-9g/mL = 0.186 x 10-6g/L =

0.186 x 10-6g/L / 56 g/mol = 0.003 x10-6 M = 3 nM

In the event that I was in this circumstance, my to begin with response would likely be one of stun and disillusionment, particularly in the event that I cherished my work and had fair begun to form progress in paying off my understudy credits.

In any case, I would too realize that usually an opportunity to investigate unused career paths and conceivably indeed discover a distant better; a much better, a higher, a stronger, an improved"an improved work or seek after other openings that will not have been accessible to me sometime recently.

In terms of finding modern work, I would begin by upgrading my continue and coming to out to my proficient arrange, counting previous colleagues and guides, to see in the event that they knew of any work openings or may give me any leads. I would moreover begin looking at worksheets and coming out to selection representatives to see in case there were any openings that coordinated my abilities and interface.

Whereas the prospect of having to discover an unused work and possibly move to an unused city or nation can be overwhelming, I would attempt to remain positive and see this as an opportunity to develop both actually and professionally. For case, I might consider seeking extra preparation or instruction in a modern field or industry, or investigating business and beginning my possess commerce.

By and large, whereas confronting the movement of my company to an outside nation would certainly be a challenging situation, I would attempt to approach it with an open intellect and see it as an opportunity to memorize, develop, and discover unused openings for myself. 

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Answer:

\(m_S=5.31x10^{-14}gS\)

Explanation:

Hello,

In this case, by knowing that we have 1 billion ( 1,000,000,000) of atoms of sulfur, via the Avogadro's number we can firstly compute the moles:

\(n_S=1,000,000,000atoms*\frac{1mol}{6.022x10^{23}atoms}\\\\ n_S=1.66x10^{-15}molS\)

Then, by using the atomic mass of sulfur (32 g/mol), we can finally compute the mass:

\(m_S=1.66x10^{-15}molS*\frac{32gS}{1molS}\\ \\m_S=5.31x10^{-14}gS\)

Best regards.

sulfide mineral is made of from metal and sulfphur

Sulfide, also written sulphide, is a category of chemicals that contain sulfur and one or more metals. The majority of sulfides have basic structural characteristics, great crystallographic symmetry, and numerous metal-like characteristics, such as metallic lustre and electrical conductivity.

Sulfides include, for instance, chalcopyrite, galena (the primary ore mineral for lead and silver), and cinnabar (the primary ore mineral for mercury) (which provides copper).

Sulfide minerals are composed of sulfur and one or more metals; sulfarsenides have some of the sulfur replaced with arsenic.

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Answer:

It affects the amount of a species that may be hunted by said predator, controlled you can say.

It can cause evolution in prey that causes them to not be caught, Darwins theory in a way.

Explanation:

Explanation:

At the level of the community, predation reduces the number of individuals in the prey population. The best example of predation involve carnivorous interactions, in which one animal consumes another, Think of wolves hunting moose, owls hunting mice, or shrews hunting worms and insects.

Answer:

C. As scientists have learned more about chemicals, they have  become more aware of their dangers

Explanation:

Chemicals are substances with standard compositions, held together by chemical bonds. Chemicals can exist in different phases such as solid, liquid, and gaseous phases. Over time, with a growing understanding of chemicals, their composition, and their reaction methods, scientists now have a better knowledge of the dangers chemicals can pose. To that effect, they have created standard safety measures for those who have to work with these chemicals.

When these guidelines are strictly adhered to, the chances of suffering accidents, burns, and explosions with these chemicals are significantly reduced.

The heat capacity for the metals are;

Aluminum -  0.89

Copper - 0.11

Iron - 0.44

Lead - 0.12

The specific heat of a substance is denoted by the symbol "C" and is typically measured in units of J/g·°C (joules per gram per degree Celsius) or cal/g·°C (calories per gram per degree Celsius).

The specific h

We have that;

For Aluminum;

c = 4.184 * 39.85 * 4.7/11.98 * 72.9

= 783.6/873.3

= 0.89

For Copper;

c =  4.184 * 12.14 * 1.9/12.14 * 75.4

= 96.5/915.3

= 0.11

For Iron

c =  4.184 * 40.24 * 2.4/12.31 * 75.1

= 404.1/924.5

= 0.44

For Lead

c = 4.184 * 39.65 * 0.7/12.46 * 76.7

c = 116.1/955.68

= 0.12

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answer:44.0095

Explanation:

sana makatulong

Answer:

44.0095

Explanation:

We assume you are converting between grams CO2 and mole. You can view more details on each measurement unit: molecular weight of CO2 or mol This compound is also known as Carbon Dioxide. The SI base unit for amount of substance is the mole.

Answer:

hope it helps...

Explanation:

Along the third type of plate boundary, two plates move laterally and pass each other along giant fractures in Earth's crust. Transform faults are so named because they are linked to other types of plate boundaries. The majority of transform faults link the offset segments of oceanic ridges.