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2 years ago

What energy conversion occurs when a battery powered car rolls across the floor ?

2 answers:

8 0

The battery stored in chemical energy . which is converted to electrical energy which is converted to mechanical energy. a electrical energy is not stored in batteries but rather in capacitors.

pishuonlain [190]2 years ago

6 0

The battery itself contains chemical energy, which is converted to electrical energy, and then converted to mechanical energy.

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You have 100 g of Pb(NO3)2. How many moles is this?

topjm [15]

Answer:

0.302 moles

Explanation:

Data given

Mass of Pb(NO₃)₂ = 100 g

Moles of Pb(NO₃)₂ = ?

Solution:

To find mole we have to know about molar mass of Pb(NO₃)₂

So,

Molar mass of Pb(NO₃)₂ = 207 + 2[14 + 3(16)]

= 207 + 2[14 + 48]

= 207 + 124

Molar mass of Pb(NO₃)₂ = 331 g/mol

Formula used :

no. of moles = mass in grams / molar mass

Put values in above formula

no. of moles = 100 g / 331 g/mol

no. of moles = 0.302 moles

no. of moles of Pb(NO₃)₂ = 0.302 moles

7 0

3 years ago

Given the following unbalanced equation:

antiseptic1488 [7]

<h3>Answer:</h3>

11.84 mol CoF₂

<h3>General Formulas and Concepts:</h3>

Math

Pre-Algebra

Order of Operations: BPEMDAS

Brackets
Parenthesis
Exponents
Multiplication
Division
Addition
Subtraction

Left to Right

Chemistry

Atomic Structure

Moles

Stoichiometry

Using Dimensional Analysis
Analyzing Reactions RxN

<h3>Explanation:</h3>

Step 1: Define

[RxN - Unbalanced] CoCl₂ + F₂ → CoF₂ + Cl₂

[RxN - Balanced] CoCl₂ + F₂ → CoF₂ + Cl₂

[Given] 11.84 moles CoCl₂

[Solve] moles CoF₂

Step 2: Identify Conversions

[RxN] 1 mol CoCl₂ → 1 mol CoF₂

Step 3: Stoich

[DA] Set up: $\displaystyle 11.84 \ mol \ CoCl_2(\frac{1 \ mol \ CoF_2}{1 \ mol \ CoCl_2})$
[DA] Multiply/Divide [Cancel out units]: $\displaystyle 11.84 \ mol \ CoF_2$

7 0

3 years ago

Climatology is a subspecialty of

rodikova [14]

Climatology is a subspecialty of a Climate and for how the climate changes. This is averaged out from over a set of a period of time.

I hope this helps! ;D

7 0

3 years ago

Write an informal definition of half-life.

Pavel [41]

the time required for the activity of a substance taken into the body to lose one half its initial effectiveness. Informal. a brief period during which something flourishes before dying out.

hope this helps ^^

6 0

2 years ago

C. 840 D. 2053...........

faust18 [17]

They have hydrogens numbers wrong its 1.008 not 1.01

4 0

3 years ago