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Answer:1 alloys 2 main

Explanation: Brass and bronze are both constructed from copper because copper is the main component in brass

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A) 4400 kj of heat released into surroundings

Reaction

C3H8(g) + 5 O2(g) → 3 CO2(g) + 4 H2O, the ∆H is –2200 kJ

Reaction exothermic( ∆H=-, released heat to surrounding) and for combustion of 1 mole of C3H8

So for two moles of C3H8, the enthalpy :

[tex]\tt -2200\times 2=-4400~kJ[/tex]

Answer:the answer is C

Explanation:

Answer:630000x

Explanation:

6.3x×100000

Answer:

1.Set your equations Raquel to each other

2.given

3.subtract 7x from both sides

4. Add 12 to both sides

5.divide both sides by four and you get negative 5

Explanation:

Answer:

0.354L

Explanation:

Given parameters:

Molarity of KCN  = 0.025M

Number of moles  = 8.84 x 10⁻³mol

Unknown:

Volume of KCN  = ?

Solution:

The molarity of a substance is expressed as;

       Molarity  = [tex]\frac{number of moles }{volume }[/tex]  

 Volume of KCN   = [tex]\frac{number of moles }{molarity}[/tex]

Now insert the parameters and solve;

  Volume of KCN  = [tex]\frac{0.00884}{0.025}[/tex]   = 0.354L

Answer:

The time of heating

Explanation:

Let us analyse the experiment closely; the temperature of the liquid increases as the time of heating increases. This implies that the temperature of the liquid is dependent on the time of heating of the liquid. The longer the time of heating, the greater the increase in temperature until the boiling temperature is eventually attained.

Hence, the temperature of the liquid is the dependent variable, the time of heating is the independent variable when the heating rate is held constant.

[tex]\huge\boxed{3moles}[/tex]

The compound given in the question is [tex]CaCO_{3}[/tex] which is called Calcium Carbonate. A 1 mole of Calcium Carbonate has,

1 Moles of Calcium.

1 Moles of Carbon.

3 Moles of Oxygen.

In the Question, It is asked that how many moles are present in the 1 mole of Calcium Carbonate, So as per information we have, there are 3 moles of oxygen present in Calcium Carbonate.

__________________________________________________________

Much simpler way to understand why there are 3 mole is look at the subscript along the element. There is no number in the subscript of Calcium and Carbon thus 1 Mole, There is 3 present in the subscript thus 3 moles of calcium. Remember that subscript suggests the number of moles of an element in only 1 MOLE OF COMPOUND

I think it's Heat and pressure

Answer:

heat and pressure did on edge

Explanation:

Answer:

Temperature is a measure of the average kinetic energy of the particles in a substance.

Answer:

atomic #8

atomic mass 15.999U

# protons 8

# neutrons 8

# protons 8

Answer: game stop and mind games

Explanation:

i live near there

Answer:

376.56

Explanation:

using the formula q=mcΔT, where m=15g, C=4.18J/g°C and ΔT=6.0°C

Answer: 80.6

Explanation:

q = mcAt

we have the grams of water, temp change, and specific heat of water is 4.186 J/g so we can plug in our numbers to find the heat energy in joules

q = (3.10)(4.184)(82.4-56.4)

q= 337.2304 J

we need our answer to be in calories so divide our answer by 4.184 and we get 80.6 calories

The amount of calorie required to warm 3.10 g of water from 56.4°C to 82.4°C is 80.6 calories.

HOW TO CALCULATE CALORIES:

Q = m × c × ∆T

Where:

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Answer:

Q = 4019.4 J

Explanation:

Given data:

Mass of ice = 20.0 g

Initial temperature = -10°C

Final temperature = 89.0°C

Amount of heat required = ?

Solution:

specific heat capacity of ice is 2.03 J/g.°C

Formula:

Q = m.c. ΔT

Q = amount of heat absorbed or released

m = mass of given substance

c = specific heat capacity of substance

ΔT = change in temperature

ΔT = T2 - T1

ΔT =  89.0°C - (-10°C)

ΔT = 99°C

Q = 20.0 g ×2.03 J/g.°C × 99°C

Q = 4019.4 J

Answer:

200

Explanation:

Explanation:

take your weight times by the amount of newtons in a pound, which is 4.45

then convert newtons into grams.

Moles HCl reacted : 0.0135

Molarity shows the number of moles of solute in every 1 liter of solute or mmol in each ml of solution

[tex]\large {\boxed {\bold {M ~ = ~ \dfrac {n} {V}}}[/tex]

Where

M = Molarity

n = Number of moles of solute

V = Volume of solution

So to find the number of moles can be expressed as

n = V x M

The volume of HCl 30 cm³=3.10⁻² dm³

Molarity of HCl = 0.45 mol/dm³

so moles HCl reacted :

[tex]\tt n=3.10^{-2}\times 0.45=0.0135[/tex]

Answer:

Wall, cup, mug, plastic spoon

Explanation:

Because all of those are glass and it is important to us to make sure that if you are touching this brle careful

Answer:

Example aflask that is made in plastic,a plastic jag

Explanation:

they share some of the things in common such us

1.the height

2. the density

Answer:

Initially, the aluminum atom had a charge of +13 + (−13) = 0; in other words, its charge was neutral due to the equal numbers of protons and electrons. When it becomes an ion, it loses 3 electrons, leaving behind only 10. Now the charge is +13 + (−10) = +3.

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Answer:

sdfs

Explanation:

dfsdfsdfs

Every element in the first column varieties a cation with charge 1+. Every component in the 2d column varieties a cation with charge 2+. Elements in the third to remaining column nearly all shape an anion with a 2- charge and factors dwelling in the 2d to closing column nearly all structure anions with a 1- charge.

Answer: Determination of Equilibrium Constant, Determination of Solubility Products, Determination of pH, Determination of Activity Coefficients,

Explanation:

Answer:

9. 122.4 yards

10. 45.395 litres