1answer.
Ask question
Login Signup
Ask question
All categories
  • English
  • Mathematics
  • Social Studies
  • Business
  • History
  • Health
  • Geography
  • Biology
  • Physics
  • Chemistry
  • Computers and Technology
  • Arts
  • World Languages
  • Spanish
  • French
  • German
  • Advanced Placement (AP)
  • SAT
  • Medicine
  • Law
  • Engineering
tia_tia [17]
3 years ago
13

In the hospital, 35 babies were born. If 22 were boys, what percentage was boys. Express your answer in places

Chemistry
1 answer:
Hunter-Best [27]3 years ago
3 0
62.857% of the babies were boys
You might be interested in
The greatest problem facing the use of nuclear power plants is _____.
FinnZ [79.3K]

Answer:

disposal of radioactive waste

Explanation:

if too much is released, it can wipe out large parts of the country

7 0
3 years ago
Read 2 more answers
A 33.0 mL sample of 1.15 M KBr and a 59.0 mL sample of 0.660 M KBr are mixed. The solution is then heated to evaporate water unt
Oksi-84 [34.3K]

Answer:

We need 13.06 grams of silver nitrate to precipitate out silver bromide in the final solution

Explanation:

<u>Step 1:</u> Data given

Sample 1: The 1.15 M sample  has a volume of 33.O mL

Sample 2: The 0.660 M sample has a volume of 59.0 mL

Molar mass of KBr = 119 g/mol

Molar mass of AgNO3 = 169.87 g/mol

<u>Step 2:</u> Calculate number of moles for both samples

Number of moles = Molarity * Volume

Sample 1:  1.15 M * 33 *10^-3 L = 0.03795 moles

Sample 2: 0.660 M *59*10^-3 L = 0.03894 moles

Total mol KBr = 0.03795 + 0.03894 = 0.07689 moles

<u>Step 3:</u> Calculate total mass

mass = Number of moles * Molar mass

mass = 0.07689 moles * 119 g/moles = 9.15 grams  ( in 55mL)

<u>Step 4</u>: Calculate moles of AgBr

AgNO3 reacts with KBr  

KBr(aq) + AgNO3(aq) → AgBr(s) + KNO3(aq)

1 mole of KBr consumed, needs 1 mole of AgNO3 to produce 1 mole of AgBr and 1 mole of KNO3

So 0.07689 moles of KBr wll need 0.07689 moles of AgNO3

<u>Step 5:</u> Calculate mass of silver nitrate

mass of AgNO3 = Moles of AgNO3 * Molar mass of AgNO3

mass of AgNO3 = 0.07689 moles * 169.87 g/mol = 13.06 grams

We need 13.06 grams of silver nitrate to precipitate out silver bromide in the final solution

8 0
3 years ago
If gold gets hot enough it will melt, what type of change is this?
SashulF [63]
A.
Physical change
Step by step explanation;:)
8 0
3 years ago
Read 2 more answers
Given w = 0, an endothermic reaction has the following.
tamaranim1 [39]

D) + ΔH and +ΔE

Given this is one of the answer choices

8 0
3 years ago
What are some questions about light pollution?
devlian [24]

Answer:

is there a way of reducing light pollution at the edges of a forest work?

6 0
3 years ago
Other questions:
  • A 55.0-g piece of copper wire is heated, and the temperature of the wire changes from 19.0 c to 86.0 c. The amount of heat absor
    14·1 answer
  • Please Help!!
    14·2 answers
  • Which shows the correct relationship? A. small K = positive ∆G = positive E0cell B. small K = positive ∆G = negative E0cell C. l
    15·2 answers
  • How much heat is evolved when 22.5 grams of a food sample changes the temperature of 0.42 kg of water by 4.4 degree C. Assume sp
    13·1 answer
  • How are the cells in our bodies organized? Cells are organized into ______ , _____
    11·1 answer
  • Which of these substances most likely dissolve in water? Check all that apply.
    6·1 answer
  • 1. What is an air mass? 2. What 2 factors characterize an air mass? 3. What determines the two characteristics of an air mass? 4
    5·2 answers
  • Guys help please!! any five effects of heat!!​
    7·1 answer
  • When a species cannot respond to environmental changes, members of that species begin to die. When the last member of a species
    7·1 answer
  • Why does neon gas consist of individual, unbonded neon atoms while chlorine exists as diatomic chlorine molecules?
    8·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!