At what temperature (°C) will a 10.00 g sample of neon gas exert a pressure of 96.7 kPa in a

9.50 L container?

Answer: The answers are

1) 200g

2) 100g per liter

3) unsaturated

4) 300

Explanation:

At 60°C, 200g must be added to 1 L of water to make a saturated solution. [Observing the graph we can see that at 60, 200g must be added]

At 25°C, the solubility is about 100 per L. [Observing the given graph]

A solution that contains 600g BaNO3 in 3L of H20 at 70°C is saturated.[By knowing the definition of Saturated solution]

For a solution that contains 300 g BaNO3 in 3L of H20 at 60°C to become saturated, 300g soluted must be added.

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Answer:

B. Hydrogen

Explanation:

Answer:

B. Hydrogen

Explanation:

The most abundant gas is hydrogen which is fuel used by stars to create energy.

Answer: Option B

Explanation: There are 12 total shapes and 2 triangles, therefore the probability would be 2/12

Answer:

B

Explanation:

Answer:

A) Index Fossils

Explanation:

Index fossils are fossils used to define and identify geologic periods. Index fossils must have a short vertical range, wide geographic distribution and rapid evolutionary trends.

Answer:

b. a substance made of only one type of atom

Explanation:

Elements are what you find on the periodic table of elements.

Take oxygen, for example. You can have one or multiple atoms, but if they are all oxygen atoms it's an element.

"a" is incorrect because water is not an element, it is a compound.

"c" is incorrect because such a thing (as far as we know) does not exist, unless we are talking about subatomic particles like protons, neutrons, and electrons that make up an atom.

"d" is incorrect because it describes a compound.

Answer:

Compounds with Carbonate ions are less soluble than the compounds with Chlorate ions.

Explanation:

The reason is that the compounds with carbonate ions have less attraction between positive and negative charges. (Solvation)

Final answer:

To find the concentration of the NaOH solution, the moles of HCl used in the neutralization were calculated and, due to the 1:1 molar ratio of the reaction, were equivalent to the moles of NaOH. The number was then divided by the volume of the NaOH solution to find its concentration, which is 0.01316 M.

Explanation:

The question requires a calculation based on the concept of titration in chemistry, which is used to determine the concentration of an unknown solution. The balanced chemical equation for the neutralization reaction is HCl(aq) + NaOH(aq) → NaCl(aq) + H2O(l). Since it takes 12.5 mL of a 0.30 M HCl solution to neutralize 285 mL of NaOH solution, we start by calculating the number of moles of HCl used using the equation:

n = C × V, where n is the number of moles, C is the concentration in molarity, and V is the volume in liters.

nHCl = 0.30 moles/L × 0.0125 L = 0.00375 moles

Since the reaction between HCl and NaOH is a 1:1 molar ratio, the moles of NaOH will also be 0.00375. To find the concentration (molarity) of NaOH, we use:

M = n/V

MNaOH = 0.00375 moles / 0.285 L = 0.01316 M

Therefore, the concentration of the NaOH solution is 0.01316 M.

Answer:

Energy cannot be created nor destroyed

Explanation:

Law of conservation of energy

The saturation of a KNO3 solution at 75g corresponds to the temperature on the solubility curve where 75g aligns with, in this case purported as 25°C (Option B).

To answer the question regarding the saturation of a KNO3 solution, you'd want to align the given quantity, 75g, on the y-axis (representing salt dissolved) with the corresponding temperature on the x-axis of the solubility curve. As the exact graph isn't provided within the question, let's assume that 75g of KNO3 aligns with 25°C. This would mean that a KNO3 solution hits saturation at 75g at 25°C, thus the answer would be B (25°C). Remember that the solubility of a substance increases with temperature, thereby allowing more salt to dissolve.

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Answer: 0.075

Explanation:

(concentration in molarity)(volume in liter) = answer

0.15 mol/L *0.500L = 0.075 mol

The number of moles of H2SO4 in the given solution is 0.075 moles.

The question is asking how many moles of H2SO4 are present in 0.500 L of a 0.150 M H2SO4 solution.

To answer this question, we can use the equation:

Moles of solute = concentration (M) x volume (L)

In this case, the concentration is 0.150 M and the volume is 0.500 L. Plugging these values into the equation, we get:

Moles of H2SO4 = 0.150 M x 0.500 L = 0.075 mol

Therefore, there are 0.075 moles of H2SO4 present in 0.500 L of the solution.

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a) 2,1,1,2

When dissolved sodium hydroxide reacts with hydrogen sulfate, aqueous sodium, sulfate, water, and heat are formed.

This reaction is known as Neutralization reaction. Since a base and acid reacts together to produce a salt.

Lets, write balanced chemical equation:

As we see, the number of each atom on reactants is same as number of each atom on product. Thus this chemical equation is balanced.

Therefore, option a) is correct.

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The balanced chemical equation for the reaction of sodium hydroxide with hydrogen sulfate to form aqueous sodium sulfate, water, and heat is H₂SO₄ (aq) + 2NaOH(aq) → Na₂SO₄ (aq) + 2H₂O(l), with coefficients of 1, 2, 1, 2 from left to right, corresponding to answer (a).

When dissolved sodium hydroxide reacts with hydrogen sulfate, the balanced chemical equation is:

H₂SO₄ (aq) + 2NaOH(aq) → Na₂SO₄ (aq) + 2H₂O(l)

The coefficients for this reaction from left to right are 1, 2, 1, and 2 respectively, which corresponds to answer (a) 2,1,1,2.

This reaction shows that sulfuric acid (H₂SO₄) is neutralized by sodium hydroxide (NaOH) to form sodium sulfate (Na₂SO₄) and water (H₂O). A mole ratio of 1:2 between sulfuric acid and sodium hydroxide is necessary to completely neutralize the acid, which shows the stoichiometric relationship between the reactants.

3823.36 kPa will be the pressure be when the  temperature reaches 928°C.

Explanation:

Data given of aerosol can:

Gas stored at a temperature T1 = 25 °C

pressure of the gas = 103 kPa OR 1.01 atm

If can thrown in fire then temperature T2 = 928 ° C

final pressure when can thrown in fire, P2 =?

Gay Lussac Law is applied to know the final volume:

[tex]\frac{P1}{T1}[/tex] = [tex]\frac{P2}{T2}[/tex]

rearranging the equation:

P2 = [tex]\frac{P1T2}{T1}[/tex]

putting the values in the equation:

P2 = [tex]\frac{1.01 X 928}{25}[/tex]

P2 = 37. 49 atm

The pressure will reach 37.49 atm or 3823.36 kPa is the pressure when it is thrown in the fire having temperature of 928 degree celsius.

The answer for the following problem is mentioned below.

Explanation:

Molarity:

The no of moles of moles present in one litre of the solution is called molarity

Given:

molarity of magnesium chloride (m) = 0.005 M

volume of magnesium chloride solution (V) = 261.5 ml

To find:

no of moles of magnesium chloride solution (n)

We know;

molarity = [tex]\frac{n}{V}[/tex]

m =  [tex]\frac{n}{V}[/tex]

where;

m represents the molarity of the magnesium chloride solution

n represents the no of moles of magnesium chloride solution

V represents the volume of magnesium chloride solution

So;

0.005 = [tex]\frac{n}{261.5}[/tex]

n = 0.005 × 261.5

n = 1.3075 moles

Therefore the no of moles in the magnesium chloride solution is 1.3075 moles.

Answer: B. If students spend at least 1 hour per night studying math, then  they will get a grade of 85 or higher.

Explanation: A hypothesis is defined as a tentative or predictions or an educated guess of scientific questions. A hypothesis is always done before performing an experiment.

The correct hypothesis for the given experiment will be "If students spend at least 1 hour per night studying math, then  they will get a grade of 85 or higher" because it has an if-then statement which is a conditional statement where statement after "if represents hypothesis" and "then represents conclusion".

Hence, the correct answer is "B. If students spend at least 1 hour per night studying math, then  they will get a grade of 85 or higher."

A possible hypothesis for an experiment on factors affecting math grades could be: 'The amount of time spent studying directly affects math grades'. This hypothesis can be tested by tracking students' study times and their corresponding math grades.

In designing an experiment about factors that affect math grades, a possible hypothesis could be: 'The amount of time spent studying directly affects math grades.' This hypothesis is testable and directly relates to the experiment's topic. You could set up an experiment where you track a group of students' math grades and measure the amount of time they dedicate to studying math. If those who study more have better math grades, your hypothesis would be supported.

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Answer:

6.60 L

Explanation:

3.13 mol * 5.29 L / 2.51 mol = 6.59669323 liters but sig figs so 6.60 L

The volume of the balloon after adding the extra argon gas is approximately 11.89 liters.

To determine the volume of the balloon after adding the extra argon gas, we can use the concept of the ideal gas law, which states:

PV = nRT

where:

-  P  is the pressure

-  V  is the volume

-  n  is the number of moles

-  R  is the ideal gas constant

-  T  is the temperature

Since the problem doesn't specify changes in pressure or temperature, we'll assume they remain constant. Therefore, the volume is directly proportional to the number of moles of gas ( [tex]V \propto n[/tex] ).

Initially, the balloon contains 2.51 moles of argon in 5.29 liters.

We can set up the proportional relationship:

[tex]\frac{V_1}{n_1} = \frac{V_2}{n_2}[/tex]

Given:

-  V₁ = 5.29  liters

-  n₁ = 2.51  moles

-  n₂ = 2.51 + 3.13 = 5.64  moles

We need to find  V₂ :

[tex]\frac{5.29 \, \text{L}}{2.51 \, \text{moles}} = \frac{V_2}{5.64 \, \text{moles}}[/tex]

Solving for  V₂ :

[tex]V_2 = \frac{5.29 \, \text{L} \times 5.64 \, \text{moles}}{2.51 \, \text{moles}} \\\\V_2 = \frac{29.8356 \, \text{L} \cdot \text{moles}}{2.51 \, \text{moles}} \\\\V_2 \approx 11.89 \, \text{L}[/tex]

Therefore, the volume of the balloon after adding the extra argon gas is approximately 11.89 liters.

Answer:

false

Explanation:

element are one type of atom so CO2 is a compound because it is two type of elements with chemical bond.

Answer:

0.142 M

Explanation:

First, convert grams of CaCl2 to moles.  The molar mass of CaCl2 is 110.984 g/mol.  You should get 0.0135 moles.

Divide moles by liters to find molarity.  You should get 0.142 M

Answer:

Localized flooding may be caused or exacerbated by drainage obstructions such as landslides, ice, debris, or beaver dams. Slow-rising floods most commonly occur in large rivers with large catchment areas. The increase in flow may be the result of sustained rainfall, rapid snow melt, monsoons, or tropical cyclones.

Explanation:

Answer : The molality of sodium chloride is, 1.79 m

Explanation :

To calculate the molality of solution, we use the equation:

[tex]\text{Molality}=\frac{m_{solute}\times 1000}{M_{solute}\times W_{solvent}\text{ (in grams)}}[/tex]

Where,

[tex]m_{solute}[/tex] = Given mass of solute (sodium chloride) = 49 g

[tex]M_{solute}[/tex] = Molar mass of solute (sodium chloride) = 58.5 g/mol

[tex]W_{solvent}[/tex] = Mass of solvent (water) = 469 g

Now put all the given values in above equation, we get:

[tex]\text{Molality of }NaCl=\frac{49g\times 1000}{58.5g/mol\times 469kg}\\\\\text{Molality of }NaCl=1.79mol/kg=1.79m[/tex]

Hence, the molality of sodium chloride is, 1.79 m

Answer:

A

Explanation:

you need to make a punnent squere

  L    L

l  Ll   Ll

l   Ll   Ll

Answer:

C) The equation is balanced for nitrogen atoms only

Explanation:

nitrogen (black one) - 1 before and 1 after reaction

oxygen (white one) - 3 before and 2 after reaction

So,

C) The equation is balanced for nitrogen atoms only

Answer:

It's C - 6:00PM.

Explanation:

Answer:

119 protons and 179 neutrons

Explanation:

Given an element of the form AB-298, we know that 298 is the mass, which means it's the sum of the number of protons and number of neutrons.

Look at the answer choices and find the one whose numbers add up to 298. Only C (119 protons and 179 neutrons) is correct because 119 + 179 = 298.

Hope this helps!

Answer:

1. The heat energy in Joules is 5280.22J

2. The heat energy in calories is 1261.4 calories

Explanation:

Step 1:

Data obtained from the question.

The following data were obtained from the question:

Mass of water (M) = 74.2 g

Initial temperature (T1) = 24°C

Final temperature (T2) = 41°C

Change in temperature (ΔT) = T2 - T1 = 41 - 24 = 17°C

Heat energy (Q) =?

Recall:

Specific heat capacity of water = 4.186 J/g°C

Step 2:

Determination of the energy in Joules.

This is illustrated below:

Q = MCΔT

Q = 74.2 x 4.186 x 17

Q = 5280.22J

Step 3:

Conversion of the heat energy in Joules to calories. This is illustrated below:

4.186 J = 1 calorie

Therefore, 5280.22J = 5280.22/4.186 = 1261.4 calories

Answer:

Examine the multiple bond for cis- and trans- isomers.

Explanation:

Answer:

B. Examine the multiple bond for cis- and trans- isomers.

Explanation:

Answer:

1.42 L

Explanation:

Step 1:

The following data were obtained from the question :

Molarity of KBr = 2.40 M

Mole of KBr = 3.40 moles

Volume of solution =?

Step 2:

Determination of the volume of the solution.

Molarity of solution is simply the mole of the solute per unit volume the of solution. It is given as :

Molarity = mole /Volume

Volume = mole /Molarity

Volume = 3.4/2.4

Volume = 1.42 L

Therefore, the volume of the solution is 1.42 L

1.00 mole of chlorine gas contains 1.20442815×10²⁴ atoms of chlorine.

The subject of this question is chemistry, specifically moles and atoms. In chemistry, a mole is a unit used to talk about a very large number of things — approximately 6.02214076×10²³, which is known as Avogadro's Number. When you have 1.00 mole of something, you have 6.02214076×10²³ of it. This means that 1.00 mol of chlorine gas (Cl₂) contains 2.00 moles of chlorine atoms. Therefore, 1.00 mol of chlorine gas contains 2.00 x 6.02214076×10²³ = 1.20442815×10²⁴ atoms of chlorine.

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Final answer:

In 1.00 mol of chlorine gas, which is diatomic (Cl₂), there are 1.2044 × 10²´ atoms of chlorine, as one mole of Cl₂ contains 6.022 × 10²³ molecules, and each molecule has two chlorine atoms.

Explanation:

To determine how many atoms of chlorine are in 1.00 mol of chlorine gas (Cl₂), we must understand the molecular composition of chlorine gas. Chlorine gas is diatomic, which means each molecule consists of two chlorine atoms. According to Avogadro's number, one mole of any substance contains 6.022 × 10²³ entities (atoms, molecules, etc.). Thus, in 1 mole of Cl₂, there are 6.022 × 10²³ molecules of Cl₂.

Since each Cl₂ molecule contains two chlorine atoms, to find the total number of chlorine atoms in one mole of Cl₂, we simply multiply Avogadro's number by two:

6.022 × 10²³ molecules/mol × 2 atoms/molecule = 1.2044 × 10²´ atoms of chlorine.

Therefore, 1.00 mol of chlorine gas contains 1.2044 × 10²´ atoms of chlorine.

Answer:

D) 40

Explanation:

The number of sex chromosomes in an organism is half the number of chromosomes the individual has.

So if the individual has 80 chromosomes, they’ll have 80/2 =40 sex chromosomes.

Answer:

A)2

Explanation: