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
yanalaym [24]
3 years ago
13

A group of students obtained the following data while trying to determine the effect of exercise on pulse rate.

Chemistry
1 answer:
ser-zykov [4K]3 years ago
7 0

Answer:

The answer is A

Explanation: They can pick and chose what kind of exercise there is as well as change it.

You might be interested in
The number of un paired electrons in the outer subshell of a cl atom is
Tatiana [17]
1 is the number of unpaired electrons in the outer subshell of a Cl atom
3 0
3 years ago
What is the correct name for MgF2?
maxonik [38]
MgF2 is <span>Magnesium fluoride

hope this helps!</span>
6 0
3 years ago
Read 2 more answers
What is the mass of the hydrogen atoms in 1 mole of water
Katen [24]

<u>Answer:</u>

2.0158 grams

<u>Explantion:</u>

We are to find the mass of the hydrogen atoms in 1 mole of water.

We know that the formula of water is: H_2O

We can see, from the above mentioned formula, that water has 2 hydrpgen atoms.

From the periodic table, we get to know that Hydrogen has an atomic mass of 1.00794 grams.

As there are 2 atoms of hydrogen in water so 2 \times 1.00794 = 2.0158 grams is the answer

3 0
3 years ago
Read 2 more answers
A 4.36 g sample of an unknown alkali metal hydroxide is dissolved in 100.0 ml of water. an acid-base indicator is added and the
Fofino [41]

Answer:

(a) 102.6g/mol

(b) Rubidium

Explanation:

Hello,

This titration is carried out by assuming that the volume of base doesn't have a significant change when the mass is added, thus, we state the following data a apply the down below formula to compute the molarity of the base solution:

V_{base}=0.1L; M_{acid}=2.5M, V_{acid}=0.017L\\V_{base}M_{base}=V_{acid}M_{acid}

Solving for the molarity of base we've got:

M_{base}=\frac{M_{acid}*V_{acid}}{V_{base}}=\frac{2.50M*0.017L}{0.1L} =0.425M=0.425mol/L

Now, we can compute the moles of the base as:

n_{base}=0.425mol/L*0.1L=0.0425mol

(a) Now, one divides the provided mass over the previously computed moles to get the molecular mass of the unknown base:

\frac{4.36g}{0.0425mol} =102.6g/mol

(b) Subtracting the atomic mass of oxygen and hydrogen, the metal's atomic mass turns out into:

102.6g/mol-16g/mol-1g/mol=85.6g/mol

So, that atomic mass dovetails to the Rubidium's atomic mass.

Best regards.

8 0
3 years ago
What is the density of a gas at STP that has a molar mass of 50.0 g/mol?
Flura [38]

Answer:

2.232 g/L

Explanation:

Assuming 1 mol, volume at STP is 22.4 L so you simply divide 50g by 22.4 L to get density

4 0
2 years ago
Other questions:
  • Plastic particles in the sea can cause problems to aquatic life ranging from plankton, fish to big animals like turtles, dolphin
    6·1 answer
  • If 25.0g of H2O at 11.2 Celsius is combined with 75.0g H2O at 87.2 degree Celsius, what is the final temperature of the mixture?
    14·1 answer
  • Chocolate drink can easily be dissolved in<br>​
    15·1 answer
  • When a match burns it's mass decreases. Is this a violation of the law of conservation of mass?
    7·2 answers
  • How does induced transmutation produce trans uranium elements ?
    9·1 answer
  • State the number of protons contained in the atomic number 8<br>​
    6·1 answer
  • Electromagnetic waves are used in many technological devices. Describe two examples of how energy from electromagnetic waves is
    8·1 answer
  • Why are animals so impportant to our lifes
    10·2 answers
  • Which of the following statements are true of thermal energy and kinetic
    8·1 answer
  • The main constituent of gallstones is cholesterol. Cholesterol may have a role in heart attacks and blood clot formation. Its el
    15·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!