1. If a ball starting at rest has a mass of 0.25 kilograms and is pushed with a force of 3.5 N, then what is the acceleration for the object from the applied force? SHOW YOUR WORK.

2. Use this equation to calculate the height a rocket reaches if the rocket were launched and it took 1.3 seconds to reach this unknown height and assuming that the acceleration is 9.81 m/s2. SHOW YOUR WORK.

Answer is C

A synthesis reaction looks like this:

A+ B → AB

Answer:

3.08 grams

Explanation:

Answer:3.08 grams

Explanation:

faxxxsss

Solutions with high pH values feel slippery. Option B is correct answer.

When a solution has a high pH, it means that it has a low concentration of hydrogen ions (H+) and a high concentration of hydroxide ions (OH-). The presence of these hydroxide ions is what gives the solution its basic or alkaline properties.

This is because they are basic or alkaline in nature. They do not turn litmus paper red, which is a property of acidic solutions. Tasting sour is also a property of acidic solutions. Giving off hydrogen gas when reacted with metal is a property of some acids, but not of solutions with high pH values.

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option (A) Adding heat to the product mixture is the right answer.

As the reactant side has more moles than the product side, the equilibrium of the reaction shifts to the left to decrease pressure by increasing volume.

If the temperature drops, equilibrium also moves to the left.

Given equation is co+ 3h2 ⇌ ch4+ h2o

When heat is added to the product mixture in this situation, equilibrium moves to the left.

A condition where opposing forces or actions are in balance is known as equilibrium.

Equilibrium is of two types:

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Answer:

It would be this below.

Explanation:

I am not 100% sure this is write but I did my best this is still kinda hard for me. I just did this a few years ago and i struggled with it but I have been doing better since then.

Hope this helps :))

Answer:

2.18 × 10³L

Explanation:

2178 litres of CO2 is produced in the combustion reaction.

HOW TO CALCULATE VOLUME

Density = mass ÷ volume

no of moles. = 5.9 × 10²⁵ ÷ 6.02 × 10²³

no. of moles = 5.9/6.02 × 10²

no. of moles = 0.98 × 10²moles

= 98moles

Moles = mass ÷ molar mass

Mass of CO2 = moles × molar mass

Molar mass of CO2 = 12 + 16(2) = 44g/mol

Mass of CO2 = 98 × 44

Mass of CO2 = 4312g = 4.312kg

Volume = 4.312kg ÷ 1.98kg/m³

Volume = 2.178m³

Since 1m³ = 1000L

2.178m³ = 2.178 × 1000

= 2178 liters.

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Answer:

Energy in the ocean and the atmosphere

Explanation:

Hope this helps!

Answer:

\(\boxed {\boxed {\sf molarity = 0.17 \ M \ C_6H_12O_6}}\)

Explanation:

Molarity is found by dividing the moles of solute by liters of solution.

\(molarity = \frac {moles}{liters}\)

We are given grams of a compound and milliliters of solution, so we must make 2 conversions.

1. Gram to Moles

We must use the molar mass. First, use the Periodic Table to find the molar masses of the individual elements.

Next, look at the formula and note the subscripts. This tells us the number of atoms in 1 molecule. We multiply the molar mass of each element by its subscript.

6(12.011)+12(1.008)+6(15.999)=180.156 g/mol

Use this number as a ratio.

\(\frac {180.156 \ g\ C_6H_12 O_6}{ 1 \ mol \ C_6H_12O_6}\)

Multiply by the given number of grams.

\(78 \ g \ C_6H_12O_6 *\frac {180.156 \ g\ C_6H_12 O_6}{ 1 \ mol \ C_6H_12O_6}\)

Flip the fraction and divide.

\(78 \ g \ C_6H_12O_6 *\frac { 1 \ mol \ C_6H_12O_6}{180.156 \ g\ C_6H_12 O_6}\)

\(\frac { 78 \ mol \ C_6H_12O_6}{180.156 }= 0.432958102977 \ mol \ C_6H_12O_6\)

2. Milliliters to Liters

There are 1000 milliliters in 1 liter.

\(\frac {1 \ L }{ 1000 \ mL}\)

Multiply by 2500 mL.

\(2500 \ mL* \frac {1 \ L }{ 1000 \ mL}\)

\(2500 * \frac {1 \ L }{ 1000 }= 2.5 \ L\)

3. Calculate Molarity

Finally, divide the moles by the liters.

\(molarity = \frac {0.432958102977 \ mol \ C_6H_12O_6}{ 2.5 \ L}\)

\(molarity = 0.173183241191 \ mol \ C_6H_12O_6/L\)

The original measurement has 2 significant figures, so our answer must have the same. That is the hundredth place and the 3 tells us to leave the 7.

\(molarity \approx 0.17 \ mol \ C_6H_12O_6 /L\)

1 mole per liter is also equal to 1 M.

\(molarity = 0.17 \ M \ C_6H_12O_6\)

Answer:

The pH scale measures acidity of a substance. known as potential of hydrogen, it varies from 0 to 14 with 7 being the pH value of a neutral solution. Below 7 shows the substance is acidic in nature and above 7 is alkaline in nature. pH 0-3 are considered strong acids while pH 4-6 are weak acids. pH 8-10 are weak alkalines and pH 11-14 are strong alkalines. This is a general trend and there may be exeptions especially if the substance has a negative pH. However, it would not be covered likely unless you are doing university chemistry.

Answer:

D

Explanation:

it seems the most logical

Answer:

B

Explanation:

6.00 ml

PLEASE MARK AS BRAINLIEST

No, it does not pass the "fat pencil" test. Therefore, a normal distribution is not a reasonable model. Option B is the correct answer.

The "fat pencil" test is a quick visual check to determine if a dataset can be reasonably approximated by a normal distribution. In this case, the pH readings of wastewater show a significant deviation from a normal distribution. The presence of several low pH values (1.0) and a few high pH values (10.0, 10.5, 11.4) indicate a non-normal distribution with skewness and potential outliers. Therefore, it is not reasonable to model these data using a normal distribution.

Option B is the correct answer.

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The reaction between nitrogen and oxygen gas to form dinitrogen monoxide has a positive entropy change in the surroundings.

This is because the reaction results in an increase in the number of gas molecules, which increases the disorder or randomness of the system. According to the second law of thermodynamics, the entropy change in the surroundings is given by the negative of the heat absorbed by the surroundings divided by the temperature at which the heat is absorbed. The exact value of the entropy change in the surroundings for this reaction depends on the specific conditions under which it occurs, such as temperature, pressure, and initial concentrations of the reactants.

The reaction between nitrogen and oxygen gas to form dinitrogen monoxide is given by:

N2(g) + O2(g) → 2NO(g)

To calculate the entropy change in the surroundings (ΔS_surroundings) associated with this reaction occurring at a specific temperature, you can use the formula:

ΔS_surroundings = -ΔH_system / T

ΔH_system is the enthalpy change of the system and T is the temperature in Kelvin. To obtain the value of ΔH_system, you can use the standard enthalpies of formation for the reactants and products. Once you have the values for ΔH_system and T, you can plug them into the formula to calculate ΔS_surroundings.

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Answer:

volume is 1.52

Explanation:

when a graph of pressure of a fixed mass of gas is plotted the reciprocal of volume a straight line is obtained

Answer:

7.39662

Explanation:

we will use boyles principal which states that the volume of a fixed mass of gas is inversely proportional to it's pressure provided temperature is constant ... the volume or atmospheric air is always 22.414l or 22414cm³ and thus apply the formula p¹v¹=p²v² hence equate to ... 1.0atm*v¹=0.33*22414cm³... (*is multiplying)

Yes the ANSWER is Correct-

On first half life the mass will be 10 gram

On second half life the mass will be 5 gram

On third half life the mass will be 2.5 gram

Answer:

1. place some sulfuric acid in a beaker and warm it in a water bath.

2. add a spatula of copper(II) oxide powder to the acid and stir with a glass rod.

3. continue adding copper(II) oxide powder until it is in excess.

4. filter the mixture to remove the excess copper(II) oxide.

Explanation:

Answer: Running water, even at a trickle, helps prevent pipes from freezing. If you decide to use fuel-burning equipment, such as a kerosene heater, ensure it is vented to outside and kept clear of any vents. Keep garage doors closed if there are water supply lines in the garage.

Explanation:

Answer:

leave your water run little bit

Explanation:

Answer:30 moles of oxygen are required if 12 moles of  are consumed.

Explanation:The given balanced equation is:

From this balanced equation, there is 2:5 mol ratio between  and  .

We are asked to calculate the moles of  required to react with 12 moles of .

It's a mol to mol conversion and the set up for this would be as:

=

So, 30 moles of oxygen are required to react with 12 moles of  .

Alkali metals exhibit the lowest first ionization energy.

Alkali metals are a group of elements. Their standard valence shell setup is ns1. Sodium (Na), Potassium (K), Rubidium (Rb), Cesium (Cs), Lithium (Li), Hydrogen (H), and Lithium are some of them (Cs).

The alkali metal with the lowest ionization energy is cesium.

Ionization energy is the energy required to remove an electron from a neutral atom or a positive ion. It is a measure of the tendency of an atom or ion to lose an electron and become a cation. The ionization energy is usually expressed in units of electron volts (eV) or kilojoules per mole (kJ/mol). The first ionization energy is the energy required to remove the outermost electron from an atom in its ground state, while the second ionization energy is the energy required to remove the second outermost electron, and so on. Generally, the ionization energy increases as we move across a period in the periodic table, and decreases as we move down a group. This is because as we move across a period, the effective nuclear charge increases, which makes it more difficult to remove an electron from the outermost shell.

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Answer:

Li3N

Explanation:

Li+N2=Li3N.........................

Answer:

4 Li(s)+O2(g) → 2 Li2O(s)

Explanation:

its right

Answer:0

Explanation: zero because it is the most stable form of oxygen in its standard state

Carbohydrate atoms usually have how hydrogen atoms as compared to oxygen atoms

The joint in the human body which is similar to the chicken wing joint is referred to as the elbow joint.

This is referred to as a point where two or more bones meet and are usually lined with cartilages so as to reduce the effect of friction as it causes wear and tear of the skeletal structures which are important for our movement.

The chicken has a structure called wing as its hands which is therefore the reason why it is similar to that of the elbow joint in humans and makes it the correct choice.

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The estimated enthalpy change for the reaction 2CO(g) + O2(g) → 2CO2(g) is approximately -995 kJ/mol.

To estimate the enthalpy change for the reaction 2CO(g) + O2(g) → 2CO2(g) using average bond enthalpies, we need to consider the bonds broken and formed in the reaction.

In the reactants, we have two CO molecules and one O2 molecule. Each CO molecule has a carbon-oxygen double bond (C=O), and the O2 molecule has a double bond between the two oxygen atoms (O=O).

To calculate the energy required to break these bonds, we refer to the average bond enthalpy values. The average bond enthalpy for a carbon-oxygen double bond (C=O) is approximately 745 kJ/mol, and the average bond enthalpy for an oxygen-oxygen double bond (O=O) is approximately 495 kJ/mol.

In the products, we have two CO2 molecules. Each CO2 molecule has two carbon-oxygen double bonds (C=O).

To calculate the energy released when these bonds form, we multiply the number of bonds formed by their respective average bond enthalpy.

The energy required to break the bonds in the reactants is:

2(C=O) + O=O = 2(745 kJ/mol) + 495 kJ/mol = 1985 kJ/mol

The energy released when the bonds form in the products is:

4(C=O) = 4(745 kJ/mol) = 2980 kJ/mol

The overall enthalpy change is the difference between the energy required to break the bonds and the energy released when the bonds form:

Enthalpy change = Energy required to break bonds - Energy released when bonds form

Enthalpy change = 1985 kJ/mol - 2980 kJ/mol

Enthalpy change ≈ -995 kJ/mol

Therefore, the estimated enthalpy change for the reaction 2CO(g) + O2(g) → 2CO2(g) is approximately -995 kJ/mol.

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The metric unit conversions based on conversion factors are:

The metric unit conversions of the given data are as follows:

1. 1 mg = 0.001 g

36.52 mg = 36.52 × 0.001

36.52 mg = 0.03652 g

2. 1 kg = 1000000 mg

14.72 kg = 14.72 × 1000000

14.72 kg = 14720000 mg

3. 1 hm = 1000 dm

0.0035 hm= 0.0035 × 1000

0.0035 hm = 3.5 dm

4. 1 m = 0.001 km

0.134 m = 0.134 × 0.001

0.134 m = 0.000134 km

5. 1mm = 0.1 cm

25 mm = 25 × 0.1

25 mm = 2.5 cm

6. 1 cm^3 = 1 mL

2.5 cm^3 = 2.5 mL

7. 1 daL= 10 L

243 daL = 243 × 10

243 daL = 2430 L

8. 1 L = 1000 mL

45.23 L = 45.23 × 1000

45.23 L = 45230 mL

9. 1 hL = 10000 cL

0.035 hL = 0.035 × 10000

0.035 hL = 350 cL

10. 1 mm = 0.001 m

27.32 mm = 27.32 × 0.001

27.32 mm = 0.02732 m

11. 1 m = 10 dm

15 m = 15 × 10

15 m = 150 dm

12. 1 cc = 0.001 L

0.023 cc = 0.023 × 0.001

0.023 cc = 0.000023 L

13. 1 km = 1000000 mm

0.00049 km = 0.00049 × 1000000

0.00049 km = 490 mm

14. 1 kg = 1000 g

0.025 kg = 0.025 × 1000

0.025 kg = 25 g

Therefore, the metric conversions based on conversion factors are:

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Answer:

36.52 mg = 0.03652 g

14.72 kg = 14720000 mg

0.0035 hm = 3.5 dm

0.134 m = 0.000134 km

25 mm = 2.5 cm

2.5 cm^3 = 2.5 mL

243 daL = 2430 L

45.23 L = 45230 mL

0.035 hL = 350 cL

27.32 mm = 0.02732 m

15 m = 150 dm

0.023 cc = 0.000023 L

0.00049 km = 490 mm

0.025 kg = 25 g

Answer:2

Explanation:

The number of valence electrons for a helium atom is 2. This can be confirmed by looking at the electronic configuration.

Helium is placed in the noble gas series as it has certain properties of it. The atomic number of helium is 2. Thus, it has two electrons in its outermost shell but it has completely filled orbital.

Electronic configuration of He = 1s2

Thus, for drawing the electron dot structure, there are two valence electrons.

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The molarity of the aqueous HCl solution, which is 37.0% HCl by mass and has a density of 1.19 g/mL, is approximately 14.8 mol/L when rounded to three significant figures.

The molarity of an aqueous HCl solution can be calculated using the formula:

Molarity = (mass of solute (in g) / molar mass of solute (in g/mol)) / volume of solution (in L)

We are given that the solution is 37.0% HCl by mass and has a density of 1.19 g/mL. This means that in 100 g of solution, there are 37.0 g of HCl. We can calculate the volume of this solution using its density:

Volume of solution = mass of solution / density = 100 g / 1.19 g/mL = 84.03 mL = 0.08403 L

The molar mass of HCl is 36.46 g/mol. Now, we can substitute these values into the formula for molarity:

Molarity = (37.0 g / 36.46 g/mol) / 0.08403 L = 14.8 mol/L

Rounding the answer to three significant figures, the molarity of the HCl solution is approximately 14.8 mol/L.

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Answer:

43.0966

Explanation:

Utica GPS Location, New York, U.s. Elevation: 43.09666.

The elevation of Polaris, as though from a New York spot, was estimated at 43,09666 °

We can use the ideal gas law to solve this problem:

PV = nRT

where P is the pressure, V is the volume, n is the number of moles of gas, R is the ideal gas constant, and T is the temperature in Kelvin.

Assuming that the number of moles of gas and the pressure are constant, we can write:

V/T = constant

This means that the product of volume and temperature is constant as long as the pressure and the number of moles of gas are held constant.

We can use this relationship to solve the problem.

Let V1 be the initial volume of the gas (150 cm³) and T1 be the initial temperature in Kelvin. Let V2 be the final volume of the gas (250 cm³) and T2 be the final temperature in Kelvin.

We can write:

V1/T1 = V2/T2

Solving for T2:

T2 = (V2/V1) * T1

The cubic expansitivity of gas at constant pressure is given by:

1/273K-1

We can convert the initial temperature from Celsius to Kelvin:

T1 = (0°C + 273.15) K = 273.15 K

Plugging in the values, we get:

T2 = (250 cm³ / 150 cm³) * 273.15 K

T2 = 455.25 K

Therefore, the temperature of the gas when its volume is 250 cm³ is 455.25 K (182.1°C).