John pushes a 10 pound box 5 feet. How much work is done?

500 ft-lb
1,000 ft-lb
5 ft-lbs
50 ft-lbs

Answer:

Non-metal

Explanation:

A non-metal is a substance that possesses the following characteristics:

- It is brittle i.e can break easily

- It does not conduct heat and electricity

- It is not lustrous i.e does not shine when polished.

According to this question, LEEN was observing the physical properties of elements in order to classify them. He found that the first element was dull, brittle, and did not conduct heat. This makes it a NON-METAL.

Answer:

group of people assembled for religious worship.

a second definition:

a gathering or collection of people, animals, or things.

other words that mean the same thing as cogeneration:

assembly gathering assemblage convocation crowd flock group mass multitude!

I just need one more brainlest so if this helped! <3

Answer:

See Explanation

Explanation:

An electrolyte is a solution which is able to conduct electricity. An electrolyte conducts electricity because of the presence of ions which move around in the solution.

Ba(OH)2 and H2SO4 are composed of ions; these ions are the charge carriers in solution and are responsible for the conductivity of the solution and the glow of the bulb.

When Ba(OH)2 and H2SO4 are mixed, the following reaction occurs;

Ba(OH)2(aq) + H2SO4(aq) -------->BaSO4(s) + 2H2O(l)

The formation of the BaSO4(s) precipitate removes the ions that are responsible for the conductivity of the solution hence the  light bulb of the conductivity apparatus dims and eventually fades completely.

Answer:

c

Explanation:

Answer: The answer is 4

Explanation:

Answer:

because they contains clues about what the earth was like in the past. different rocks from under only certain conditions and even the dullest gray lump of rock.

Answer and Explanation:

If the future did not address global warming properly, then the world will become too hot faster than it should, and the days will get extremely hot, and in the distant future, lead to our extinction.

To address this problem, we can spread the awareness about it, get people to think open minded and not think that global warming is a joke, and plant trees, which takes in the carbon dioxide we exhale.

#teamtrees #PAW (Plant And Water)

Answer:

D

Explanation:

A buffer solution contains (1)a weak base and its salt, or (2) a weak acid and its salt.

So, the combination of the weak acid CH3COOH and its salt CH3COONa will make a buffer.

Answer:

D. CH3COOH and CH3COONa

Explanation:

A buffer is made of:

- a weak acid + its conjugate base

- a weak base + its conjugate acid

A. NaOH is a strong base

B. KOH is a strong base

C. HCl is a strong acid

Answer:

Atomic theory is the scientific theory that matter is composed of particles called atoms. Atomic theory traces its origins to an ancient philosophical tradition known as atomism. ... An atom is now defined as the basic particle that composes a chemical element.

Explanation:

Hope i helped

Explanation:

Answer:

Genes are segments of deoxyribonucleic acid (DNA) that contain the code for a specific protein that functions in one or more types of cells in the body.

Chromosomes are structures within cells that contain a person's genes. A trait is any gene-determined characteristics and is often determined by more than one gene.

for study island:

A single trait can be controlled by multiple genes.

A single gene can influence multiple traits.

Answer:

it's a temperature where a solid will melt

when hydrogen and oxygen combine then they form water as product

also in neutralization reaction water form as product

hope it helps

Water is always a product in a type of chemical reaction called a neutralization reaction.

A reaction is a process that involves the transformation of one or more substances into one or more different substances.

Neutralization reaction is type of reaction occurs when an acid and a base react together to form a salt and water. The general equation for a neutralization reaction is:

[tex]\rm acid + base \rightarrow salt + water[/tex]

In this type of reaction, the hydrogen ions ([tex]\rm H^+[/tex]) from the acid combine with the hydroxide ions ([tex]\rm OH^-[/tex]) from the base to form water ([tex]\rm H_2O[/tex]). The remaining ions from the acid and the base combine to form a salt.

Therefore, water is always a product in a neutralization reaction, which occurs when an acid and a base react together to form a salt and water.

Learn more about reaction here:

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Answer: true

Explanation:

Answer:

wdyes giid gefwefgfw

Explanation:

egtetethe sanswers fe

Explanation:

hece ,, it is your answer you can see

The new volume with raised temperature can be find out using Charles's law. When the temperature of the gas is raised to 20 to 30 degree celsius, the volume will increase from 3 L to 4.5 L.

Charles law states that at constant pressure, the volume and temperature of a gas are in direct proportion.

Hence V/T = a constant.

Let V1 and T1 bet the initial volume and temperature and V2 and T2 be the final volume and temperature respectively. Then we can write it as:

[tex]\rm \frac{V_{1}}{T_{1}} = \frac{V_{2}}{T_{2}}[/tex]

It is given that the initial volume and temperature of the gas are 3 L at 20 degree Celsius. The final temperature is 30 degree celsius then the final volume can be calculated as :

V2 = V1 T2/ T1

     = (3 L × 20 °C) / 30 °C

     = 4.5 L.

Hence, the final volume of the gas is 4.5 L.

To find more on Charles law, refer here:

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Answer:

I guess this answer is c

yh

Answer:

b. (Actual yield ÷ theoretical yield) x 100

Explanation:

The percent yield will be a ratio of collected or actual yield to the theoretical yield. Like any percentage, you are determining a part of a whole. You multiply by 100 to convert your decimal answer from the division into a percentage.

Answer:

750 mmHg

Explanation:

From the question given above, the following data were obtained:

Partial pressure of CO₂ (Pₐ) = 250 mmHg

Partial pressure of N₂ (P₆) = 375 mmHg

Partial pressure of He (P꜀) = 125 mmHg

Pressure of the mixture (Pₜ) =?

The pressure of the mixture of the gases can be obtained as follow:

Pₜ = Pₐ + P₆ + P꜀

Pₜ = 250 + 375 + 125

Pₜ = 750 mmHg

Therefore, the pressure of the mixture of the gases is 750 mmHg

Answer:

2 joule

Explanation:

10 gram= 0,01kg

The ball has kinetic enegry

K=1/2 *m *speed²

K=1/2 *0,01 * 400

K=2 Joule

Answer:

the rate at which sulfur dioxide is being produced is 0.8993 kg per second

Explanation:

Given the data in the question;

we write the balanced chemical reaction

2H₂S + 3O₂ → 2SO₂ + 2H₂O

now we calculate the number of moles of oxygen by using an ideal gas equation; PV = nRT

n = PV/RT

so we substitute in our values

n = ( 0.77 × 1.01325 × 10⁵ × 994 × 10⁻³ ) / ( 8.314 × (170 + 273 )

n = 77552.1285 / 3683.102

n = 21.056 mol

so, moles of SO₂  produced = 2/3 × 21.056 = 14.0373 moles

Hence, the production rate will be;

⇒ 14.0373 × 64.066

= 899.3 g/s

= 0.8993 kg/s

Therefore, the rate at which sulfur dioxide is being produced is 0.8993 kg per second

Answer:

53.5gram.

Explanation

Explanation: number of moles = number of molecule ÷ avogadro's number. => moles = 6.022 × 10²³ ÷ 6.022 × 10²³ = 1 mole. mass of 1 mole of NH4Cl = 1 × molar mass.

Answer: Thus empirical and molecular formula is sa,e for [tex]C_4H_8O[/tex]

Explanation:

Molecular formula is the chemical formula which depicts the actual number of atoms of each element present in the compound.  

Empirical formula is the simplest chemical formula which depicts the whole number of atoms of each element present in the compound.  

1. The empirical formula is [tex]CO_2H[/tex]

The empirical weight of [tex]CO_2H[/tex] = 1(12)+2(16)+1(1)= 45g.

The molecular weight = 90 g/mole

Now we have to calculate the molecular formula:

[tex]n=\frac{\text{Molecular weight }{\text{Equivalent weight}=\frac{90}{45}=2[/tex]

The molecular formula will be=[tex]2\times CO_2H=C_2O_4H_2[/tex]

2. The empirical formula is [tex]CH_3O[/tex]

The empirical weight of [tex]CH_3O[/tex] = 1(12)+3(1)+1(16)= 31 g.

The molecular weight = 62 g/mole

Now we have to calculate the molecular formula:

[tex]n=\frac{\text{Molecular weight }{\text{Equivalent weight}=\frac{62}{31}=2[/tex]

The molecular formula will be=[tex]2\times CH_3O=C_2H_6O_2[/tex]

3. The empirical formula is [tex]C_2H_4O[/tex]

The empirical weight of [tex]C_2H_4O[/tex] = 2(12)+4(1)+1(16)= 44 g.

The molecular weight = 88 g/mole

Now we have to calculate the molecular formula:

[tex]n=\frac{\text{Molecular weight }{\text{Equivalent weight}=\frac{88}{44}=2[/tex]

The molecular formula will be=[tex]2\times C_2H_4O=C_4H_8O_2[/tex]

4. The empirical formula is [tex]C_4H_8O[/tex]

The empirical weight of [tex]C_4H_8O[/tex] = 4(12)+8(1)+1(16)= 72 g.

The molecular weight = 72 g/mole

Now we have to calculate the molecular formula:

[tex]n=\frac{\text{Molecular weight }{\text{Equivalent weight}=\frac{72}{72}=1[/tex]

The molecular formula will be=[tex]1\times C_4H_8O=C_4H_8O[/tex]

Answer:

c.11.43 g of aluminum hydroxide

Explanation:

Answer:

Shared (bonding) electrons : 8

Unshared (lone, non-bonding) electrons : 16

Explanation:

The Lewis dot stricture of the molecule attached to this answer shows us all the valence electrons present in the molecule.

Altogether, we have a total number of 24 valence electrons in SO3.

There are eight electrons shared between atoms of elements, these are the bonding electrons.

There are sixteen electrons that are not shared between atoms of elements, These are the lone or non-bonding electrons.

Hence, there are four shared pairs of electrons and eight pairs of unshared electrons.

Answer:

25°C

Explanation:

Combined Gas Law (P₁V₁)/T₁ = (P₂V₂)/T₂

(0.947 atm)(150 mL)/25°C = (0.987 atm)(144mL)/T₂

5.682 = 142.128/T₂

T₂ = 142.128/5.682

T₂ = 25.0137272756°C = 25°C

Answer:

potential energy

Explanation: