CHEMISTRY HIGH SCHOOL

Help asapppshow work and help me plz for the other one just do 22,24,25 i will make you brainllest

Answers

Answer 1

Answer:

Answer: 22) < 24) 0.003 30,000 25) 1 cc = 1 ml

Explanation:

When give a number in scientific notation, the exponent tells you how many places to move the decimal point.

Negative moves to the left.
Positive moves to the right.

$22)\ 5* 10^(-4)=0.0005\quad \longrightarrow 0.0005<1.0$

$24)\ 3* 10^(-4)=0.0003\qquad \qquad 3* 10^4=30,000$

25) 1 cubic centimeter (cc) = 1 milliter (ml)

The conversion factor is 1 to 1. You just need to change cc to ml

Related Questions

Cobalt is a metal. Which best describes the cobalt atom and its interactions with other cobalt atoms?
17. Which of the following is true about an electrolytic cell? It changes electrical energy into chemical energy. It is the type of cell used in electroplating It uses an electric current to make a nonspontaneous reaction go. All of the above 18. The products formed in the net reaction of the electrolysis of water are ____. aqueous hydrogen ion and hydroxyl ion hydrogen gas and oxygen gas liquid hydrogen and oxygen gas liquid oxygen and hydrogen gas 19. What occurs in electroplating? decomposition of a metal layer decomposition of a salt layer deposition of a metal layer on a material deposition of a salt layer on a metal
Which of the following statements is true? a. Ag(s) reacts spontaneously with 1 M H+(aq). b. Ag(s) reacts spontaneously with Ni2+. c. Ag(s) reacts spontaneously with 1 M NO3– in 1 M H+(aq). d. Ni2+ reacts spontaneously with 1 M H+(aq) to form H2. e. Ni2+ reacts spontaneously with H2(g).
Increasing the _________________ of a reactant exposes more of it to the reaction taking place. a. catalyst b. surface area c. concentration d. heat
Which describes the role of sunlight in chemical reactions?

Which equation represents a change that results in an increase in disorder?

Answers

This equation represents a change that results in an increase in disorder I2(s)=>I2(g).

Express the answer in scientific notation and with the correct number of significant figures: (6.32 x 10-4) ÷ 12.64

Answers

Answer : $5.0 X 10^(-5)$

Explanation : We need to simply calculate the division for finding the correct answer and which can be expressed in scientific notation.

$(6.32 X 10^(-4) )/(12.64)$

The answer on solving will be $5.0 X 10^(-5)$ .

Simple division method was used to find out the answer.

Im pretty surr this is an odyssey question? If so its 5.00•10^-5

Hydrogen and helium in the universe were formed by which of these phenomena?a. Big bang
b. Fusion in small stars
c. Fusion in very large stars
d. Supernova

Answers

I think the answer is a

A 34.87 g sample of a substance is initially at 27.1 C. after absorbing 1071 J of heat, the temperature of the substance is 145.0 C. what is the specific heat (SH) of the substance?SH=___ J / g * C

Answers

$H= (1071)/(34.87)*145\nH= (155295)/(34.87) \nH= (15529500)/(3487) \nH=4453.542$

Answer: .1044 J/g*C°

Explanation: The equation you need to use for this problem is :

c= q/m* ΔT

We are given

T1= 27.1 C°

T2= 145 C°

M= 34.87g

1071 J absorbed heatt

So let's solve specific heat

c= 1071J/ (87grams)*(145 C°- 27.1 C°)

c= 1071J/10,257.3 g*C°

c= .1044 J/g*C°

c=specific heat

Potato strips placed in a container of concentrated salt water will ultimately __.

Answers

Shrivel/shrink and become flaccid because the water inside of the potato leaves the potato and joins the salt water due to the lower concentration in the salt water

Calculate the percentage of yield when 20 grams of sodium chloride solution reacts with an excess amount of silver nitrate solution knowing that 45 grams of silver chloride precipitated

Answers

Percentage % yield = 91.8%

Given:

20 g NaCl

45 g AgCl

To find:

% yield=?

The balanced chemical equation will be:

NaCl + AgNO₃ ⇒ AgCl + NaNO₃

First, we need to calculate moles of NaCl.

$\text{Number of Moles}=\frac{\text{Given Mass}}{\text{Molar Mass}} \n\n\text{Number of Moles}=(20)/(58.44) \n\n\text{Number of Moles}= 0.342 moles$

Then, calculate moles of AgCl from equation:

$\text{mol of AgCl}= 1/1 * \text{ mol NaCl}\n\n\text{mol of AgCl}= 1/1 * 0.342\n\n\text{mol of AgCl}= 0.342$

Mass AgCl(theoretical) :

$\text{Mass of AgCl}= mol * MW\n\n\text{Mass of AgCl}= 0.342 x 143,32 g/mol\n\n\text{Mass of AgCl}= 49.02 g$

Now, calculate for percentage yield.

$\%yield =(actual)/(theoretical) * 100\%\n\n\%yield = (45/49.02) * 100\%\n\n\%yield = 91.8\%$

The percentage yield will be 91.8%.

Learn more:

brainly.com/question/21091465

%yield = 91.8

Further explanation

Given

20 g NaCl

45 g AgCl

Required

%yield

Solution

Reaction

NaCl + AgNO₃ ⇒ AgCl + NaNO₃

mol NaCl :

= mass : MW

= 20 g : 58,44 g/mol

= 0.342

mol AgCl from equation :

= 1/1 x mol NaCl

= 1/1 x 0.342

= 0.342

Mass AgCl(theoretical) :

= mol x MW

= 0.342 x 143,32 g/mol

= 49.02 g

%yield = (actual/theoretical) x 100%

%yield = (45/49.02) x 100%

%yield = 91.8