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3 years ago

Clayton pulled his back helping friend move and uses a thermal heat wrap to ease his muscle aches. How could Clayton monitor the

Chemistry

2 answers:

Marat540 [252]3 years ago

6 0

Should be THERMOMETER

padilas [110]3 years ago

3 0

Answer: The answer is A) Calorimeter

Explanation: The temperature change is occurring in a hand warmer, making it hard to measure directly with a thermometer. In a calorimeter, the hand warmer is submerged in water and the temperature change of the water can easily be measured.

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What is the mass of 3.77mol of K3N?

AleksAgata [21]

<h3>Answer:</h3>

495 g K₃N

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

<u>Pre-Algebra</u>

Order of Operations: BPEMDAS

Brackets
Parenthesis
Exponents
Multiplication
Division
Addition
Subtraction

Left to Right<u> </u>

<u>Chemistry</u>

<u>Atomic Structure</u>

Reading a Periodic Table

<u>Stoichiometry</u>

Using Dimensional Analysis

<h3>Explanation:</h3>

<u>Step 1: Define</u>

3.77 mol K₃N

<u>Step 2: Identify Conversions</u>

Molar Mass of K - 39.10 g/mol

Molar Mass of N - 14.01 g/mol

Molar Mass of K₃N - 3(39.10) + 14.01 = 131.31 g/mol

<u>Step 3: Convert</u>

Set up: $\displaystyle 3.77 \ mol \ K_3N(\frac{131.31 \ g \ K_3N}{1 \ mol \ K_3N})$
Multiply/Divide: $\displaystyle 495.039 \ g \ K_3N$

<u>Step 4: Check</u>

<em>Follow sig fig rules and round. We are given 3 sig figs.</em>

495.039 g K₃N ≈ 495 g K₃N

5 0

3 years ago

When bismuth-212 undergoes alpha decay, it becomes which of the following?

Iteru [2.4K]

Answer: -

When bismuth-212 undergoes alpha decay, it becomes ²⁰⁸Tl

Explanation: -

Mass number of ²¹²Bi = 212

Atomic number of ²¹²Bi = 83

When alpha decay occurs the mass number decreases by 4 and the atomic number decreases by 2.

Mass number of daughter = 212 - 4 = 208

Atomic number of daughter = 83 - 2 = 81

It is the atomic number of Thallium Tl.

Thus the daughter nucleide is ²⁰⁸Tl.

8 0

3 years ago

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What animal is most like to harmed when a beaver builds a dam

siniylev [52]

Answer:

Small fish or insects.

Explanation:

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3 years ago

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The diagram below shows a cell placed in a solution.

Sholpan [36]

it will expand as water moves into it.

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3 years ago

Which which atom is held together by covalent bonds?

Sedaia [141]

Covalent bonds are strong bonds. Atoms that share pairs of electrons form molecules. A molecule is a group of atoms held together by covalent bonds. A diatomic molecule is a molecule containing only two atoms.

4 0

3 years ago