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Fudgin [204]
3 years ago
7

PLSS HELP ME! Read each statement below and decide if you agree or disagree. Write Agree or Disagree below each statement, based

on your decision.
1. Temperature is the measurement of how hot or cold something is.

2. When something heats up, new energy is created, and when something cools down, energy is destroyed.

3.When something heats up, it moves faster, and when something cools down, it moves slower.

4. Hotter things have more energy than colder things.
Chemistry
1 answer:
motikmotik3 years ago
4 0

Answer:

1. Temperature is the measurement of how hot or cold something is.

agree

2. When something heats up, new energy is created, and when something cools down, energy is destroyed.

disagree

3.When something heats up, it moves faster, and when something cools down, it moves slower.

agree

4. Hotter things have more energy than colder things.

agree

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What process describes how plants use air, water, and energy from the Sun to make their own food? A) water.
CaHeK987 [17]

D) the products of photosynthesis.

8 0
4 years ago
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How many moles of NaOH is needed to neutralize 45.0ml of 0.30M H2SeO4?
kiruha [24]

Answer:

0.027 mole of NaOH.

Explanation:

We'll begin by obtaining the number of mole H2SeO4 in 45mL of 0.30M H2SeO4

This is illustrated below:

Molarity of H2SeO4 = 0.3M

Volume of solution = 45mL = 45/1000 = 0.045L

Mole of H2SeO4 =...?

Mole = Molarity x Volume

Mole of H2SeO4 = 0.3 x 0.045

Mole of H2SeO4 = 0.0135 mole

Next, the balanced equation for the reaction. This is given below:

H2SeO4 + 2NaOH –> Na2SeO4 + 2H2O

From the balanced equation above,

1 mole of H2SeO4 required 2 moles of NaOH.

Therefore, 0.0135 mole of H2SeO4 will require = 0.0135 x 2 = 0.027 mole of NaOH.

Therefore, 0.027 mole of NaOH is needed for the reaction.

8 0
4 years ago
Read 2 more answers
Phosphoric acid is a triprotic acid ( K a1 = 6.9 × 10 − 3 , K a2 = 6.2 × 10 − 8 , and K a3 = 4.8 × 10 − 13 ). To find the pH of
timama [110]

Answer:

Ka2 values should be used in obtaining pKa2 in the Henderson–Hasselbalch equation

Explanation:

During first dissociation from H3PO4 to H2PO4-, ka1 will be used, and from H2PO4-to HPO4-, ka2 values will be used, hence a buffer solution containing H2PO4-and HPO4-will use ka2 in obtaining pKa2 in the Henderson–Hasselbalch equation.

7 0
4 years ago
1. How much energy must be absorbed to break the bonds of the 2 molecules of HCl?
IRISSAK [1]

Bond energy refers to the energy that must be taken in to break a bond. It is also the energy required to form the bond.

<h3>What is Bond energy?</h3>

The term bond energy refers to the energy that must be taken in to break a bond. It is also the energy required to form the bond.

The energy that must be supplied to break the bonds in two molecules of HCl is 862 J. The energy released is obtained from; 862J - [436 +262] = 164J.

The total energy of the reaction is 164J, this is called the enthalpy change. Based on this value of the total energy, the reaction is endothermic. Hence, it is true that; "It takes more energy to break the two H–Cl bonds than is released when forming the H–H and Cl–Cl bonds."

Learn more about bond energy:brainly.com/question/16754172?

#SPJ1

6 0
3 years ago
The empirical formula of a sample of gold bromide was found by adding aluminum metal to an aqueous solution of gold bromide, dis
Nataly [62]

Answer:

a. True

Explanation:

The formula for determining the gold bromide formula, aqueous solution is added. When the solution is introduced with aluminum metal, the gold bromide reacts and displaces the gold metal. This is an electrolysis technique which is used for metals.

5 0
3 years ago
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