All categories

3 years ago

PLEASE IM IN AN EXAM I NEED HELP ASAPP

Chemistry

1 answer:

Whitepunk [10]3 years ago

8 0

The first one is unbalanced, the photo below is proof.

You might be interested in

PLEASE ANSWER QUICK. Place in order from simplest (top) to most complex (bottom).

Marina86 [1]

Answer:

Cell

tissue

organ

organsystem

organism

6 0

3 years ago

Describe the factors which make an organism living

Anvisha [2.4K]

All living organisms share several key characteristics or functions: order, sensitivity or response to the environment, reproduction, adaptation, growth and development, homeostasis, energy processing, and evolution. When viewed together, these characteristics serve to define life.

Hey Mate! ! ! I hope this was helpful if yes please mark me brainliest.

6 0

3 years ago

What is the frequency of individuals with doctorates work in the field of physical science

Ghella [55]

Answer:

B) 1000-2000

Explanation:

uwu

5 0

4 years ago

Read 2 more answers

How many moles are in 3.24 x 1020 particles of lead? (show work plz)

lesya [120]

<h3>Answer:</h3>

0.000538 mol Pb

<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

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

Stoichiometry

Using Dimensional Analysis

<h3>Explanation:</h3>

Step 1: Define

3.24 × 10²⁰ particles Pb (lead)

Step 2: Identify Conversions

Avogadro's Number

Step 3: Convert

Set up: $\displaystyle 3.24 \cdot 10^{20} \ particles \ Pb(\frac{1 \ mol \ Pb}{6.022 \cdot 10^{23} \ particles \ Pb})$
Multiply/Divide: $\displaystyle 0.000538 \ mol \ Pb$

Step 4: Check

Follow sig fig rules and round. We are given 3 sig figs.

Our final answer is in 3 sig figs, no need to round.

7 0

3 years ago

Which of the following measurements is expressed to three significant figures?

matrenka [14]

The answer is C. 7.30 x 10^-7

8 0

3 years ago