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Tomtit [17]
2 years ago
9

Calculate the amount of heat needed to raise the temperature of 4 ml of water from 10C to 30C

Chemistry
1 answer:
Over [174]2 years ago
4 0

Answer:

Q=80cal

Explanation:

Hello,

In this case, the relationship between heat, mass, specific heat and change in temperature is understood by:

Q=mCp(T_2-T_1)

In this case, since the involved substance is water, whose specific heat is 1 cal/(g°C), we compute the heat 4 mL of water need to rise the temperature from 10 °C to 30 °C as shown below:

Q=4mL*\frac{1g}{1mL}*1\frac{cal}{g\°C}*(30\°C-10\°C)\\  \\Q=80cal

Best regards.

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Group 2A metal oxides react with water to produce hydroxides. When 35.55 g of CaO are placed into 125 mL of water (d= 1.000 g/mL
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Answer is: mass of calcium hydroxide is 46.98 grams.
Balanced chemical reaction: CaO + H₂O → Ca(OH)₂.
m(CaO) = 35.55 g.
n(CaO) = m(CaO) ÷ M(CaO).
n(CaO) = 35.55 g ÷ 56 g/mol.
n(CaO) = 0.634 mol; limiting reactant.
m(H₂O) = 125 mL · 1.000 g/mL.
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From chemical reaction: n(CaO) : n(Ca(OH)₂) = 1 : 1.
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Identify the major ionic species present in an aqueous solution of C12H22O11 (sucrose).
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<h3><u>Answer;</u></h3>

No ions present

<h3><u>Explanation;</u></h3>
  • Ionic compounds are compounds made up of ions. These ions are atoms that gain or lose electrons, giving them a net positive or negative charge.
  • Atoms that gain electrons and therefore have a net negative charge are known as anions. Conversely, atoms that lose electrons have a net positive charge are called cations.
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3 years ago
WILL GIVE BRAINLIEST
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Answer:

ust use the equation

M1 X V1 = M2 X V2

where M1 is the initial concentration, V1 the volume of M1, M2 the final concentration and V2 the final volume. Here you are looking for V1 so, first solve for V1 and put in the numbers.

V1 = (M2 X V2)/M1 = (3 X 0.5)/18 = 0.5/6 = 0.083 L or 83 mL

Explanation:

pls make me brainliest

7 0
2 years ago
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