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3 years ago

PLEASE HELP PLEASE HELP PLEASE HELP PLEASE HELP PLEASE HELP

Chemistry

1 answer:

vivado [14]3 years ago

8 0

Answer:

not sure about it .I also need an answer

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I'm not sure which category this is. But please help me on this!!

MrRissso [65]

Answer:

Tom

Explanation:

Simply because we see Claudia used a shortcut. Tom uses more physical force than Claudia, since Claudia only had to push the boxes into there required shelves.

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3 years ago

Calculate the density of a liquid if 58.9 ml of it has a mass of 46.08 g. answer in units of g/ml.

alexira [117]

Density of a solution is mass of solution per unit volume
Density = mass/volume
mass of solution is 46.08 g
volume of solution is 58.9 mL
since mass and volume is known, density can be calculated
density = 46.08 g / 58.9 mL = 0.78 g/mL

8 0

3 years ago

How many moles of methane are in 7.31*10^25 molecules?

GrogVix [38]

<h3>Answer:</h3>

121 mol CH₄

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

<u>Math</u>

<u>Pre-Algebra</u>

Order of Operations: BPEMDAS

Brackets
Parenthesis
Exponents
Multiplication
Division
Addition
Subtraction

Left to Right

<u>Chemistry</u>

<u>Organic</u>

Writing chemical compounds
Writing organic structures
Prefixes
Alkanes, Alkenes, Alkynes

<u>Atomic Structure</u>

Using Dimensional Analysis
Avogadro's Number - 6.022 × 10²³ atoms, molecules, formula units, etc.

<h3>Explanation:</h3>

<u>Step 1: Define</u>

7.31 × 10²⁵ molecules CH₄

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

Avogadro's Number

<u>Step 3: Convert</u>

<u /> $\displaystyle 7.31 \cdot 10^{25} \ molecules \ CH_4(\frac{1 \ mol \ CH_4}{6.022 \cdot 10^{23} \ molecules \ CH_4} ) = 121.388 \ mol \ CH_4$ <u />

<u />

<u>Step 4: Check</u>

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

121.388 mol CH₄ ≈ 121 mol CH₄

7 0

3 years ago

5. A grouping of organisms based on shared characteristics is called

lidiya [134]

Classification ,
correct me if i’m wrong

8 0

3 years ago

Read 2 more answers

A student wants to test if giving dogs a toy to play with makes their tail wag more. He gives dog toys to one group, while anoth

kicyunya [14]

Answer:

Experimental: the dogs who get the toys

Control: the dogs who dont recieve a toy

Explanation:

expermental is the group that recieved the tested variable in this case that being the toy

control is the group that doesn't recieve the tested variable

4 0

3 years ago