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
nignag [31]
3 years ago
15

Can anyone check my chemistry answers?

Chemistry
1 answer:
frutty [35]3 years ago
4 0
I check all of them. most of them correct but one

in question 6, the answer is the third choice. remember to find the neutrons, you take the atomic mass minus the atomic number. 38 - 18= 20
You might be interested in
The correct sequence where reactivity towards oxygen increases.
ziro4ka [17]

Answer:

Option D is good to go!

Explanation: as per the reactivity series more reactive substances will react with the counterpart substance.The most reactive substance here is calcium while the least reactive is aluminium, the magnesium comes in between.As per their reactivity, these substances will react with oxygen.

Explanation:

3 0
3 years ago
Hi! My responsibility is to add and protection to plant cells. what i am​
liq [111]
Probably a cell wall
4 0
3 years ago
Picture this in your mind as you read it: You weigh an empty, clean, dry beaker on the balance (scale). It weighs 32.15 grams. Y
AleksAgata [21]

Answer:

2.25 g

Explanation:

The mass of the solid X must be the total mass (beaker + solid X) less than the mass of the beaker. Then:

mass of the solid X = 34.40 - 32.15

mass of the solid X = 2.25 g

The difference of 0.25 g must occur for several problems: an incorrect weight in the balance, the configuration of the balance, the solid can be hydrophilic and absorbs water, and others.

6 0
3 years ago
Which best describes the future of wind power for providing electricity in the United States?
aev [14]

Answer:

c.

Explanation:

4 0
3 years ago
15.0 g of cream at 10.0 ℃ are added to an insulated cup containing 150.0 g of coffee at 78.6 °C. Calculate the equilibrium tempe
elena-14-01-66 [18.8K]

Answer:

The equilibrium temperature of the coffee is 72.4 °C

Explanation:

Step 1: Data given

Mass of cream = 15.0 grams

Temperature of the cream = 10.0°C

Mass of the coffee = 150.0 grams

Temperature of the coffee = 78.6 °C

C = respective specific heat of the substances( same as water) = 4.184 J/g°C

Step 2: Calculate the equilibrium temperature

m(cream)*C*(T2-T1) = -m(coffee)*c*(T2-T1)

15.0 g* 4.184 J/g°C *(T2 - 10.0°C) = -150.0g *4.184 J/g°C*(T2-78.6°C)

62.76T2 - 627.6 = -627.6T2 + 49329.36

690.36T2 = 49956.96

T2 = 72.4 °C

The equilibrium temperature of the coffee is 72.4 °C

7 0
3 years ago
Other questions:
  • The sodium atom contains 11 electrons, 11 protons, and 12 neutrons. what is the atomic mass of sodium?
    7·1 answer
  • The atomic mass of an atom can be found by
    7·1 answer
  • Chemistry help please
    15·1 answer
  • A neutral atom possesses an atomic number of 13 and an atomic mass of 27. Three electrons are lost. From what region of the atom
    10·2 answers
  • 7.8g of dioxide would be produced from how many moles of potassium chlorate
    7·1 answer
  • When burned, coal releases _____. oxygen carbon dioxide methane sulfur nitrogen oxide?
    15·1 answer
  • Which statement is true of the motion of the ball?
    11·1 answer
  • Which best explains the statement "It has no definite volume”?
    8·2 answers
  • How are you! :D I hope your doing good
    5·1 answer
  • What percentage of oxygen is attributed fossil fuel combustion
    6·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!