What is rent? A. The amount you spend on needs each month B. The amount you pay to purchase a house C. The amount you pay to live in a space such as an apartment D. The amount you pay for electricity and water

Answer:

D

Explanation:

compound 1 probably ether and compound 3 1-bromo ethane have 2 carbon atoms

\(\\ \tt\Rrightarrow \nu=\dfrac{c}{\lambda}\)

\(\\ \tt\Rrightarrow \nu=\dfrac{3\times 10^8}{1000\times 10^{-9}}\)

\(\\ \tt\Rrightarrow \nu=0.003\times 10^{17}s^{-1}\)

\(\\ \tt\Rrightarrow \nu=3\times 10^{14}Hz\)

Answer:

Here's a diagram.

Explanation:

Answer:

All stars are formed from collapsing clouds of gas and dust, often called nebulae or molecular clouds. Over the course of millions of years, these protostars settle down into a state of equilibrium, becoming what is known as a main-sequence star. Nuclear fusion powers a star for most of its existence.

Explanation:

Answer:

SO₄²⁻ (aq) + Pb²⁺ (aq) → PbSO₄ (s)

General Formulas and Concepts:

Explanation:

Step 1: RxN

Na₂SO₄ (aq) + Pb(NO₃)₂ (aq) → PbSO₄ (s) + NaNO₃ (aq)

Step 2: Balance RxN

Na₂SO₄ (aq) + Pb(NO₃)₂ (aq) → PbSO₄ (s) + 2NaNO₃ (aq)

Step 3: Ionic Equations

Total Ionic Equation:

2Na⁺ (aq) + SO₄²⁻ (aq) + Pb²⁺ (aq) + 2NO₃⁻ → PbSO₄ (s) + 2Na⁺ (aq) + 2NO₃⁻ (aq)

Cancel out spectator ions.

Net Ionic Equation:

SO₄²⁻ (aq) + Pb²⁺ (aq) → PbSO₄ (s)

Answer:

b

Explanation:

Answer:

X: mechanical energy

Y: electrical energy( C)

Explanation:

Answer: The energy of an electron in the n = 2 level of a hydrogen atom is 3.40 eV.

Explanation:

Given: n = 2

The relation between energy and \(n^{th}\) orbit of an atom is as follows.

\(E = - \frac{13.6}{n^{2}} eV\)

Substitute the values into above formula as follows.

\(E = - \frac{13.6}{n^{2}} eV\\= - \frac{13.6}{(2)^{2}}\\= - 3.40 eV\)

The negative sign indicates that energy is being released.

Thus, we can conclude that the energy of an electron in the n = 2 level of a hydrogen atom is 3.40 eV.

To determine the number of significant figures in a measurement, count the number of digits from the first nonzero digit to the end of the measurement.

To determine the number of significant figures in a measurement, count the number of digits from the first nonzero digit to the end of the measurement. In the problem given, we have:

The number 204 m has 3 significant figures since it has three nonzero digits.

The number 6 m has 1 significant figure since it only has one nonzero digit.

The final answer will have the same number of significant figures as the measurement with the fewest significant figures, so it will have 1 significant figure.

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Explanation:

Carbon-14 has a half life of 5730 years, meaning that 5730 years after an organism dies, half of its carbon-14 atoms have decayed to nitrogen atoms. Similarly, 11460 years after an organism dies, only one quarter of its original carbon-14 atoms are still around.

Answer:

Yes, it does have an important role in humanity!

Explanation:

In human life, refraction of light plays an important role. It has many applications in optics and imaging technology. Some of the applications are: Refraction concave and convex glasses are used to correct the refractive errors of human eyes.

its use full to humanity if you stay back jk

Answer:

I believe the answer would probably most likely read D in my point of view that's what I think so I can get the answer wrong

Answer:

D

Explanation:

Answer:+178

Explanation:

The heat of the reaction for the following reactions is 178 kJ. the correct option is D.

The heat that is added or removed during a chemical reaction is called the heat of reaction.

It is also called the enthalpy of the reaction.

The heat is absorbed or released to maintain the temperature of the reaction.

The enthalpy can be calculated by subtracting the enthalpy of the product from the enthalpy of the reactant.

Thus, the correct option is D.

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Answer:

Example 1

palladium(II) nitrate,

Example 2

Metal catalysts such as Fe, Ni, Mo, and Co are routinely used in the manufacture of CNMs.

Explanation

The three metals used in catalytic converters — rhodium, platinum and palladium — are part of a category known as platinum group metals, or PGMs, which are known for their catalytic properties.

I choose the lower limit 0.024 mg/kg/day

1 pound = 0.453592 kg

135 pounds = 61.235 kg

dosage/day = 0.024 x 61.235 = 1.47 mg

Answer:

See below

Explanation:

I will use the approximate AVERAGE

                         of the dosage range  ~ .20 mg/kg/week

135 pounds = 61.23 kg

Now , for SEVEN days/week dosing:

61.23 kg  * .20 mg/kg-wk  /  7 days/week  = 1.75 mg/day

More molecules in a fixed volume means more pressure.

According to the context, the term may or may not include ions that meet this requirement. A molecule is a collection of two or more atoms held together by attractive forces known as chemical bonds.

Hence, it can be seen that an increase in the number of gas molecules, while container volume stays constant, increases pressure.

A decrease in container volume increases gas pressure. An increase in the temperature of a gas in a rigid container increases the pressure

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Answer:

Explanation:

The pH of 0.02 M hydrochloric acid is approximately 1.7.

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Answer:

1.0 moles of N2

Explanation:

since

1.0 × avogadro's no# = same answer for SO2 and N2

avogadro's no#= 6.02× 10²³

The number of molecules in 1.0 mole of SO₂ is the same as the number of molecules in (3) 0.25 mole of NO₂.

Option (3) is correct.

Avogadro's number, approximately 6.022 x 10²³, represents the number of molecules or atoms in one mole of any substance. In this case, 1.0 mole of SO₂ contains the same number of molecules as any other substance with 1.0 mole, such as 1.0 mole of N₂ or 2.0 moles of Ne.

However, when comparing different moles of substances, we can use the concept of stoichiometry and molar ratios to determine the number of molecules. Given that 1 mole of SO₂ is equivalent to 1 mole of NO₂, 0.25 mole of NO₂ would also contain the same number of molecules as 1 mole of SO₂. Therefore, the number of molecules in 1.0 mole of SO₂ is the same as the number of molecules in 0.25 mole of NO₂.

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Answer:

nitrogen is a gas

Explanation:

nitrogen is a gas which consists of diatomic molecules and about 78%of it occupies the atmosphere

According to the law of reciprocal proportions, they should combine in the ratio of 10.24:7.92:1.29 by mass.

According to the law of reciprocal proportions when two elements join to form more than one compound, the weights of one element that combine with a fixed weight of the another are in a ratio of small whole numbers.

In phosphine, phosphorus = 91.1 parts and hydrogen = 8.9 parts

So, 8.9 pads of hydrogen combine with phosphorus = 91.1 parts .

1 part of hydrogen combine =  91.1 / 8.9

= 10.24 parts

Similarly,

for water 88.8 / 11.2

= 7.92 parts of hydrogen

For Phosphorus tetra oxide

= 56.4 / 43.6

= 1.29 parts

Thus, According to the law of reciprocal proportions, they should combine in the ratio of 10.24:7.92:1.29 by mass.

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The number of moles of oxygen produced is 0.065 mol.

The molarity of a chemical compound is largely decided in chemistry by trying to divide the mass of a sample of that compound by the amount of substance of that compound, which corresponds to the number of moles in that specimen, evaluated in moles. A substance's molar mass is a bulk property rather than a molecular one. A substance's molar mass is its mass in grams per mole of the compound. A mole is the measurement of the quantity of atoms, molecules, or ions in a substance. A mole is 6.022 1023 molecules of any given substance.

The total mass of all the atoms in a molecule expressed in grams per mole is known as the molar mass.

The mass of the oxygen gas produced = 2.1 g

The molar mass of oxygen gas  , \(O_{2}\) = 2 × 16 g/mol

= 32 g/mol

The formula for the calculation of moles

= mass taken /  molar mass

Thus,

Moles = 2.1 / 32

= 0.065 mol

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In this question, we have to do something different, since we now have the mass and not the number of moles of Hg2S, we need to find the number of moles and we will do that by using the molar mass of Hg2S, 232.66g/mol

232.66g = 1 mol

800g = x moles of Hg2S

x = 3.44 moles of Hg2S

Now we can use this number of moles and Avogadro's constant number

1 mol = 6.022*10^23

3.44 moles = x particles

x = 2.07*10^24 particles of Hg2S

Answer:

Its D and E

Explanation:

i took the test and the other guy who answered gave u half of the answer

hope this helps

pls mark brainliest

The information which can be inferred about the Sun according to the graph include:

This is defined as a pictorial representation of data in an organized manner.

From the graph, we can infer that the Sun has an intermediate temperature and is less brighter than most stars.

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The balanced chemical equation is CaS + AlC → A + CaC

To balance the chemical equation CaS + AlC → A + CaC, we need to ensure that the same number of atoms of each element is present on both sides of the equation. Here's the step-by-step process to balance the equation:

Begin by counting the number of atoms of each element on both sides of the equation.

Left side (reactants):

Calcium (Ca): 1

Sulfur (S): 1

Aluminum (Al): 1

Carbon (C): 1

Right side (products):

A: 1

Calcium (Ca): 1

Carbon (C): 1

Sulfur (S): 0

Start by balancing the elements that appear in the fewest compounds. In this case, we can balance sulfur (S) first. Since there is only one sulfur atom on the left side and none on the right side, we need to add a coefficient of 1 in front of A on the right side to balance the sulfur.

CaS + AlC → 1A + CaC

Next, balance calcium (Ca) by adding a coefficient of 1 in front of CaS on the left side.

1CaS + AlC → 1A + CaC

Now, balance aluminum (Al) by adding a coefficient of 1 in front of AlC on the left side.

1CaS + 1AlC → 1A + CaC

Finally, balance carbon (C) by adding a coefficient of 1 in front of CaC on the right side.

1CaS + 1AlC → 1A + 1CaC

The balanced chemical equation is:

CaS + AlC → A + CaC

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Answer:

Physical, Inorganic, Biochemistry, Analytical, and Organic

Physical chemistry deals with applying physics to the study of matter. It's also probably the most important branch. Inorganic chemistry deals with stuff that is chemically composed of elements other than carbon. The branch of Biochemistry concerns itself with living things. Analytical chemistry deals with analyzing and finding out what substances are present in a particular material and how much of each substance is present. Finally, organic chemistry deals with substances that are compounds of carbon.

Explanation:

The balanced equation for the given reaction is:

4 Si4C3 + 15 O2 → 8 Si2O3 + 3 C

What is Balanced Chemical Equation?

The coefficients in a balanced chemical equation represent the stoichiometric relationship between the reactants and products. They show the relative amounts of each substance that are involved in the reaction. In the given chemical equation, Si4C3 + O2 -> Si2O3 + C, the coefficients can be determined by balancing the number of atoms of each element on both sides of the equation.

Starting with Si, there are 4 Si atoms on the left and 2 Si atoms on the right, so a coefficient of 2 is needed in front of Si2O3 to balance the number of Si atoms.

Moving on to C, there are 3 C atoms on the left and 1 C atom on the right, so a coefficient of 3 is needed in front of C to balance the number of C atoms.

Finally, for O, there are 2x3=6 O atoms on the left and 2x2=4 O atoms on the right, so a coefficient of 3 is needed in front of O2 to balance the number of O atoms.

The balanced equation is thus: Si4C3 + 3O2 -> 2Si2O3 + 3C, with coefficients of 1, 3, 2, and 3 for Si4C3, O2, Si2O3, and C, respectively.

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The density of a piece of wood with the given values for its mass and volume would be = 0.042g/cm³

Density is defined as the quantity that shows how the particles or molecules of a substance as packed together in a unit mass. It is therefore known as the mass per unit volume of a substance.

Density is very important because in a liquid medium, it allows us to determine what substances will float and what substances will sink.

Mathematically, density can be represented as follows:

Density = mass/volume = m/v, which is measured in kg/m³ or g/cm³.

The volume of the wood = 4× 6× 8 = 192cm³

The mass of the given wood = 8g

The density = 8/192 = 0.042g/cm³

Therefore, the density of the piece of wood which has the following given values would be = 0.042g/cm³.

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Complete question:

A rectangular piece of wood measures 4cm by 6cm by 8cm and has a mass of 8g. What is the density of wood of the piece?

Answer:

+2

Explanation:

Because the charge of the chloride ion is negative, that means that the charge of the magnesium ion must be positive since cations and anions go together, not cation and cation nor anion and anion. Using the "reverse criss-cross method", since the subscript of Mg is 1, that means that this is the lowest whole number ratio so we don't need to worry about simplifying. Therefore, since the charge of Cl is 2, the answer is +2.

NH3 (8) + 3H20 (1) NO₂ (aq) + 9H+ (aq) + 8e- is the balance of half-reaction in acidic solution .

The NH3 oxidation number is -3. The oxidation number of nitrogen in NO2 is +5. So, this is now available. As a result of the oxidation process, electrons will be released. In an acidic medium, each оудeт excess atom is balanced by adding the same number of water molecules on the side with fewer oxygen atoms and doubling the number of H+ ions on the other side. As a result, the balanced equation is: NH3 (8) + 3H20 (1) NO2 (aq) + 9H+ (aq) + 8e-. half-reaction is a portion of a larger reaction that represents either an oxidative stress or a reduction. To fully describe a redox, half, one oxidation and one decrease, are needed. In general, the half-reactions first were balanced individually by atomic nuclei. The quarter contain electrons. The amount of electrons lost is then balanced to balance the electron density gained. Finally, the half are combined. The concentration of hydrogen ions (H +start subscripts, plus, end superscript) in an acidic solution seems to be greater than that of pure water. A basic solution has a lower H +start superscript as well as end superscript density than pure water.

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