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
Gemiola [76]
3 years ago
7

I really need help with this Im lost

Chemistry
1 answer:
Illusion [34]3 years ago
5 0
I believe it would weigh less if it’s blown up with helium because helium is lighter than air
You might be interested in
Muscles need a stimulus from which to of the following to "tell" them contract? A. A muscle call B. The skeleton C. A nerve cell
kompoz [17]
The answer is C a nerve cell 
4 0
3 years ago
2.04 thermal and chemical change
bazaltina [42]

Explanation:

thermal changes are those in which heat exchange is involved like endothermic and exothermic

while in chemical changes collision between the reactant occurs which result into product

8 0
1 year ago
The exhaust gas from an automobile contains 3% by volume of carbon monoxide (CO). Express this concentration in mg/m3 at 25oC an
ser-zykov [4K]

Answer:

24540\frac{mg}{m^3}

Explanation:

Hello,

In this case, since the 3% by volume is represented as:

\frac{3L\ CO}{L\ gas}

By using the ideal gas equation we compute the density of CO:

\rho =\frac{MP}{RT} =\frac{28g/mol*1atm}{0.082\frac{atm*L}{mol*K}*298K}= 0.818g/L

Then we apply the conversion factors as follows:

=\frac{3L\ CO}{100L\ gas}*\frac{0.818g\ CO}{1L\ CO} *\frac{1000mg\ CO}{1g\ CO} *\frac{1000L\ gas}{1m^3\ gas} \\\\=24540\frac{mg}{m^3}

Regards.

4 0
3 years ago
NO LINKS!! :)
77julia77 [94]

Answer:

The velocity of ball and man after catching ball is  

Explanation:

Since there is no friction and no external force the momentum is conserved .

Here when man catches ball then man and ball move with common velocity .

3 0
2 years ago
Read 2 more answers
1. Hermione is trying to replicate the Polyjuice Potion that they created in their second year at Hogwarts. The problem is that
faltersainse [42]

Answer:

A) Test(independent) variable is bat wings.

B) Result (dependent) Variable is the Polyjuice Potion.

C) Cauldrons and fire

Explanation:

A) A test/independent variable is the variable that is being tested in the experiment or research and it is not affected by other variables in the experiment.

Now, in this experiment, what is being tested is are the bat wings.. Thus;

Test(independent) variable is bat wings.

B) Result (dependent) Variable is a variable that depends on the independent variable being tested. From the question, the result is the Polyjuice Potion.

Thus, Result (dependent) Variable is the Polyjuice Potion.

C) The constants are things that don't change with respect to any of the other variables. In this case, they are; cauldrons and fire

4 0
3 years ago
Other questions:
  • A cat jumps 1 m forward and then crawls 0.2 m backward. What is the displacement of the cat? 1.2 m forward 0.8 m 0.8 m forward 1
    8·1 answer
  • 1. In which of these cases do we have enough information to say that the atom is electrically neutral?
    15·2 answers
  • The enzyme urease catalyzes the breakdown of urea in the body. Urease breaks urea down to 2NH3+CO2. This is an example of a hydr
    8·1 answer
  • What 4 words make up the acronym for NASA.
    5·2 answers
  • An aqueous solution of calcium hydroxide is standardized by titration with a 0.120 M solution of hydrobromic acid. If 16.5 mL of
    6·1 answer
  • Which measurement is a object mass
    9·2 answers
  • Question 1 (1 point)
    5·1 answer
  • How many neutrons are present in 1 atom of chlorine?
    8·2 answers
  • Fill in the blank answers please help.
    10·1 answer
  • What are the top eight elements found in the Earth’s crust?
    11·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!