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
RUDIKE [14]
2 years ago
10

The heaviest known alkaline earth metal is radium, atomic number 88.

Chemistry
1 answer:
jeka57 [31]2 years ago
4 0

Answer:

Hi im an online tutor and I can help  you with  your assignments. we have experts in all fields. check out our website for assistance https://toplivewriters.com

Explanation:

You might be interested in
How do you find the amount of moles is .032 grams of water and whats the answer
masha68 [24]

Answer:

\boxed {\boxed {\sf 0.0018 \ mol \ H_2 O }}

Explanation:

First, we need to find the molecular mass of water (H₂O).

H₂O has:

  • 2 Hydrogen atoms (subscript of 2)
  • 1 Oxygen atom (implied subscript of 1)

Use the Periodic Table to find the mass of hydrogen and oxygen. Then, multiply by the number of atoms of the element.

  • Hydrogen: 1.0079 g/mol
  • Oxygen: 15.9994 g/mol

There are 2 hydrogen atoms, so multiply the mass by 2.

  • 2 Hydrogen: (1.0079 g/mol)(2)= 2.0158 g/mol

Now, find the mass of H₂O. Add the mass of 2 hydrogen atoms and 1 oxygen atom.

  • 2.0158 g/mol + 15.9994 g/mol = 18.0152 g/mol

Next, find the amount of moles using the molecular mass we just calculated. Set up a ratio.

0.032 \ g  \ H_2 O* \frac{ 1 \ mol \ H_2 O}{18.0152 \ g \ H_2 O}

Multiply. The grams of H₂O will cancel out.

0.032 * \frac{1 \ mol \ H_2 O}{18.0152 }

\frac{0.032 *1 \ mol \ H_2 O}{18.0152 }

0.00177627781 \ mol \ H_2 O

The original measurement given had two significant figures (3,2). We must round to have 2 significant figures. All the zeroes before the 1 are not significant. So, round to the ten thousandth.

The 7 in the hundred thousandth place tells us to round up.

0.0018 \ mol \ H_2 O

There are about <u>0.0018 moles in 0.032 grams.</u>

6 0
2 years ago
You are building a uniform to protect workers from all types of nuclear radiation. If you use material that blocks _____ radiati
defon
A. Gamma radiation because it reaches further than beta and alpha rays
8 0
3 years ago
!PLEASE HELP! !URGENT! 25 POINTS
Varvara68 [4.7K]
B! because the hydrogen causes some nuclear reactions.
5 0
3 years ago
Read 2 more answers
Which best describes a compound such as magnesium oxide
Mamont248 [21]
A pure substance made up of different elements

hope this helped!!
7 0
3 years ago
A sample of nitrogen gas with a volume of 2.55 L is collected at a pressure of 670.0 mmHg. If the temperature is held constant,
Hoochie [10]

Answer:

U will equate and make V2 the subject

5 0
2 years ago
Other questions:
  • The human body can get energy by metabolizing proteins, carbohydrates or fatty acids, depending on the circumstances. Roughly sp
    15·1 answer
  • Write an equation that shows the formation of a chromium(ii) ion from a neutral chromium atom.
    14·2 answers
  • What does pure substance mean in chemistry?
    9·1 answer
  • I really need help with this assignment
    7·1 answer
  • Which of the following is a major consequence of the shifting of the Intertropical Convergence Zone (ITCZ)? A. monsoon rains in
    13·1 answer
  • Substances A, B, and C can all act as oxidizing agents. In solution, A is green, B is yellow, and C is red. In the reactions in
    5·1 answer
  • one parent has type AB blood while the other has Type O blood.Which two blood type could their children have?
    12·1 answer
  • 3. Which element has the ground state electronic configuration, 1s22s22p63s23p645' ?
    8·1 answer
  • A solution is made by dissolving 15.0 mL of oil in enough gasoline to give 50.0 mL of solution. What is the % (v/v) of oil in th
    12·1 answer
  • Plus ten points)Jamie set up the following circuit. She noticed that the bulbs were not working. How can Jamie fix the circuit t
    11·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!