HELP ME NOW PLEASE 80 points

Answer:

B

that's all HAHA why do it have to be 20 characters to answerrr

Answer:

a) Sodium Chloride is the limiting reactant.

b)285g of Ba3(PO4)2

Explanation:

a) 1000g Nacl x (1mol of Nacl/58.5g) x (2 Mol Na3PO4/6 mol of NaCl)= 5.70

- 2000g Ba3 (PO4)2 X 1 mol of Ba3 (PO4)2/601.9 x 2 mol of Na3PO4/1 mol of Ba3 (PO4)2= 6.65

Hence; NaCl is the limiting Reactant.

b) 1000g Nacl x (1mol of Nacl/58.5g) x 1 mol of Ba3 (PO4)2/ 6 mol of NaCl x601.9g/1 mol= 1715g  Ba3(PO4)2 USED.

2000g- 1715g=285g of Ba3(PO4)2 Left.

Sodium chloride is a limiting reagent.

284 grams of barium phosphate (excess reactant) are left.

Explanation:

Given:

[tex]6NaCl+Ba_3(PO_4)_2\rightarrow 2Na_3PO_4+3BaCl_2[/tex]

1000 grams of sodium chloride and 2000 grams of barium phosphate.

To find:

The limiting reactant and mass of excess reactant left.

Solution:

Mass of sodium chloride = 1000 g

Moles of sodium chloride =[tex]\frac{1000 g}{58.44 g/mol}=17.11mol[/tex]

Mass of barium phosphate = 2000 g

Moles of barium phosphate =[tex]\frac{2000 g}{601.93 g/mol}=3.323 mol[/tex]

[tex]6NaCl+Ba_3(PO_4)_2\rightarrow 2Na_3PO_4+3BaCl_2[/tex]

According to reaction, 6 moles of sodium chloride reacts with 1 mole of barium phosphate, then 17.11 moles of sodium chloride will react with:

[tex]=\frac{1}{6}\times 17.11mol=2.852 \text{ mol of }Ba_3(PO_4)_2[/tex]

2.852 moles of barium phosphate reacted with 17.11 moles of sodium chloride.

But according to the question, we have 3.323 moles of barium phosphate which is more than 2.852 moles.

This indicates that barium phosphate is an excessive reagent and sodium chloride is a limiting reagent.

Moles of barium phosphate left unreacted:

[tex]=3.323 mol - 2.852 mol = 0.471 mol[/tex]

Mass of 0.471 moles of barium phosphate:

[tex]=0.471 mol\times 601.93 g/mol=283.51\approx 284 g[/tex]

Sodium chloride is a limiting reagent.

284 grams of barium phosphate (excess reactant) are left.

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Answer: a truck crashes into a car

Explanation:

The truck drives in a wrong motion which makes the reaction of it crashing.

Answer: a: 0.04

b: 0

c: x

d: x

e: x

f: 0.04

Explanation:

Answer:

well with that you can make a water maker that might make you brother happy because it will keep him alive

Explanation:

Answer:

you could sew a doll for him

or you could punch him in the face and tell him to cheer up

Explanation:

Answer:

c. c. c c c c c cçcc. ccccccccc

Explanation:

ccc cc

When solid converts to gas then heat is required to break the intermolecular forces of attraction between the particles. In this process heat increase but temperature remains the same. So option A is correct option.

Phase transition is a process in which transition takes place from one state to another of a medium on changing temperature or pressure.  Phase transition is a physical process as there is no breaking of old bond and forming of new bonds takes place.

During phase transition temperature remain constant as the extra heat that is given to the system that goes into breaking of  intermolecular forces of attraction between the particles. So overall temperature remains same but heat keeps on increasing. Hence option A is correct.

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Answer:

No, thermal energy is not being transferred by radiation.  The eggs are in direct contact with the metal pan, which is in direct contact with the gas flame, so this is conduction, not radiation. Radiation transfers thermal energy by electromagnetic waves, not by direct contact.

Answer:

no

Explanation:

a metal pan is cooking the eggs because the flame is touching the pan and the molecules are colliding with each other

Answer:

it is option A hope it helps

The properties of nonmetallic oxides include acidity and covalent character. Hence, option A is correct.

Non - metals are elements in the rightmost side of the periodic table. Non -metals are mostly gases and some of them include, metalloids also. Non-metals are commonly electron -deficient and some of them are highly electronegative.

A compound shows covalent character, if the electrons are shared between the constituent atoms. Covalency increases from left to right in periodic table.

As the covalent character increases, acidity increases. Oxides of non-metals are electrophiles and acts as Lewis acids. They are all covalent compounds. Therefore, option A is correct.

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Answer:

the bell is longitudinal

the secound one is transverse

third is longitudinal

the fourth is transverse

Explanation:

i got it right on my mastery test

Beryllium (Be) will form an ionic compound with nitrogen with the general formula M[tex]_3[/tex]N[tex]_2[/tex]. Therefore, the correct option is option D.

Metal refers to any of a class of substances that have excellent electrical and thermal conductivity, malleability, flexibility, or light reflection. Metals account for over 75% of any and all chemical elements currently known.

Aluminum, iron, salt, potassium, and magnesium are the most abundant elements in the Earth's crust. Most metals can be found in ores, while some, such as copper, gold, platinum, even silver, are frequently found in their free state because they do cannot easily react with other elements. Beryllium (Be) will form an ionic compound with nitrogen with the general formula M[tex]_3[/tex]N[tex]_2[/tex].

Therefore, the correct option is option D.

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Answer:

Energy and how it can change forms. Kinetic, potential, and chemical energy.

Answer:

Cellular differentiation

Explanation:

Answer:

cellular differentiation

Explanation:

Answer:

c.atomic mass

Explanation:

The total number of protons plus neutrons is called the atomic mass number for the atom.

Answer:

Frequency

Explanation:

When we talk about crests, we are referring to the high points of a wave.

We measure wave frequency by counting out the the number of crests (or high points) of a given wave that pass by a given point in a set amount of time. Thus, the higher the number of crests, the greater the frequency of the wave and vice versa.

We define the frequency of a wave as the number of waves that passes by a fixed point within a given period of time.

Answer:

The SI base unit for amount of substance is the mole. 1 grams NaOH is equal to 0.025001806380511 mole.

Answer:

0.025001806380511 mole.

Explanation:

The SI base unit for amount of substance is the mole. 1 grams NaOH is equal to 0.025001806380511 mole.

Answer:

6.022×1023 atoms

Explanation:

Answer:

2C6H6 + 15O2 → 12CO2 + 6H2O

Answer:

2C6H6 + 15O2 --> 12CO2 + 6H2O

a. 0.137

b. 0.0274

c. 1.5892 g

d. 0.1781

e. 5.6992 g

Given

Reaction

2 C4H10 + 13O2 -------> 8CO2 + 10H2O

2.46 g of water

Required

moles and mass

Solution

a. moles of water :

2.46 g : 18 g/mol = 0.137

b. moles of butane :

= 2/10 x mol water

= 2/10 x 0.137

= 0.0274

c. mass of butane :

= 0.0274 x 58 g/mol

= 1.5892 g

d. moles of oxygen :

= 13/2 x mol butane

= 13/2 x 0.0274

= 0.1781

e. mass of oxygen :

= 0.1781 x 32 g/mol

= 5.6992 g

0.137moles of water is formed, 0.0274 moles or 1.5892 g of butane burned and 0.1781 moles or 5.6992 g of O₂ is used.

Those reaction in which fuel is oxidized by the oxygen molecules and produce carbon dioxide and water molecule.

Given chemical reaction is:
2C₄H₁₀ + 13O₂ → 8CO₂ + 10H₂O

Given mass of water = 2.46 grams

Moles will be calculated as:

n = W/M, where

W = given mass

M = molar mass

(a) Moles of water formed is calculated as:

Moles of water n = 2.46g / 18 g/mol = 0.137moles

(b) From the stoichiometry of the reaction, it is clear that:

10 moles of water = produced by 2 moles of butane

0.137 moles of water = produced by 2/10×0.137=0.0274 moles of butane

(c) Weight of butane is calculated by using moles:

W = 0.0274 × 58 g/mol = 1.5892 g

(d) From the stoichiometry of the reaction, it is clear that:

2 moles of butane = react with 13 moles of O₂

0.027 moles of butane = react with 13/2×0.027=0.1781 moles of O₂

(e) Mass of oxygen is calculated as:
W = 0.1781 x 32 g/mol = 5.6992 g

Hence, (a) 0.137moles, (b) 0.0274 moles, (c) 1.5892 g, (d) 0.1781 moles and (e) 5.6992 g.

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Answer:0.178 moles

Explanation: carbon trihydride seems to be an unusual name for the methyl group CH3–

ionic wt 15

moles = 2.67/15 = 0.178

Answer:

Positive: Save fuel and reduces greenhouse gas

Negative: Harmful to human and animal health ( underwater animals), Hurts the food chain

Explanation:

I got it from a video. Hopefully it helps you.

C. a long chain of carbon atoms with hydrogen atoms attached to them.

Explanation:

Answer:

C.

a long chain of carbon atoms with hydrogen atoms attached to it

Answer:

7.98 × 10^3grams.

Explanation:

To find the mass of fluorine in the number of atoms provided, we first divide the number of atoms by Avagadros number (6.02 × 10^23atoms) to get the number of moles in the fluorine atom. That is;

number of moles (n) = number of atoms (nA) ÷ 6.02 × 10^23 atoms

n = 2.542 × 10^26 ÷ 6.02 × 10^23

n = 0.42 × 10^ (26-23)

n = 0.42 × 10^3

n = 4.2 × 10^2moles

Using mole = mass ÷ molar mass

Molar/atomic mass of fluorine (F) = 19g/mol

mass = molar mass × mole

Mass (g) = 19 × 4.2 × 10^2

Mass = 79.8 × 10^2

Mass = 7.98 × 10^3grams.

Answer:

Exothermic

Explanation:

The equation of the reaction is given as;

H₂O(vapour) --> H₂O(liquid)

The equation above represents a condensation process. Water vapour condenses to liquid.

Condensation involves loss of energy as heat. The equation can be modifies as;

H₂O(vapour) --> H₂O(liquid) + Heat

Due to the loss of heat, condensation is regarded mas an exotheric process.

hope it helps you .............

Answer:

Covalent bonds usually occur between nonmetals. For example, in water (H2O) each hydrogen (H) and oxygen (O) share a pair of electrons to make a molecule of two hydrogen atoms single bonded to a single oxygen atom. ... Covalent compounds tend to be soft, and have relatively low melting and boiling points.

Answer: a) Temperature of [tex]170^0C[/tex]

b) [tex]C_2H_5OH\stackrel{conc H_2SO_4, 170^0C}\rightarrow C_2H_4+H_2O[/tex]

c) dehydrating agent

Explanation:

Ethanol is heated with an excess of concentrated sulfuric acid at a temperature of 170°C to produce ethene.

The balanced chemical reaction is:

[tex]C_2H_5OH\stackrel{conc H_2SO_4, 170^0C}\rightarrow C_2H_4+H_2O[/tex]

Here concentrated sulfuric acid removes a water molecule from ethanol and thus acts as a dehydrating agent.

Answer: 5 molecules

Explanation:

2 molecules of K and 3 molecules of O

Answer:

Air pressure is greater at sea level than at the top of a mountain. The amount of air at sea level is greater than that on top of a mountain.

Explanation:

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