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enot [183]
3 years ago
8

Please help help ASAP Please help It’s do in a 1 hour What conclusion can you draw about the relationship between physical activ

ity and a
person's pulse rate?
Chemistry
2 answers:
Airida [17]3 years ago
5 0

Answer:

the more physical activity you do the higher your heart rate rises

Explanation:

me every time I walk more then two steps honestly

hjlf3 years ago
3 0

Answer:

During exercise, heart rate can rise dramatically, from a resting rate of 60–80 beats per minute to a maximum rate of about 200 for a young adult. While you are running, blood flow is diverted toward tissues that need it most. For example, muscles in the arteries in your legs relax to allow more blood flow.

Explanation:

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How many grams of water are made from the reaction of 4.0 grams of hydrogen gas with the given reaction 2H2+O2--->2H2O
Sergeeva-Olga [200]

Answer:

The mass of water is 36 g.

Explanation:

Mass of hydrogen = 4 g

Mass of water = ?

Solution:

First of all we will write the balance chemical equation:

2H₂ + O₂  →  2H₂O

Number of moles of hydrogen = mass / molar mass

Number of moles of hydrogen = 4 g/ 2 g/mol

Number of moles of hydrogen = 2 mol

Now we compare the moles of water with hydrogen from balance chemical equation.

                               H₂     :     H₂O

                                2      :       2

Mass of water = moles × molar mass

Mass of water =  2 mol × 18 g/mol

Mass of water =  36 g

If the water oxygen is in excess than mass of water would be 36 g.

4 0
3 years ago
Pls help, needed for chemistry
vovangra [49]

Answer:

go to a calculator and see the answer then make the hypothisis which is the answer

Explanation:

magic

7 0
2 years ago
Is sodium benzoate soluble in NaOH, NaHCO3
krek1111 [17]
It is water soluble so is also soluble in aqueous solutions of NaOH or NaHCO3.
6 0
3 years ago
Read 2 more answers
HEY EVERYONE its poofett my account got deleted for no absolute reason! >:D​
PilotLPTM [1.2K]

Answer:

am very sorry

Explanation:

5 0
2 years ago
Read 2 more answers
The density of liquid mercury is 13.6 g/mL. What is its density in units of lb/in​3​? (2.5 cm+1 in., 2.205 lbs= 1 kg., 1000 g =1
shusha [124]

Answer:

Density, \rho=0.49\ lb/in^3

Explanation:

It is given that the density of liquid mercury is 13.6 g/mL. We need to convert the density into lb/in³.

We know that,

2.205 lbs= 1 kg

1 g = 0.0022 lb

1 mL = 0.0610 in³

13.6\ \dfrac{g}{mL}=13.6\times \dfrac{0.0022\ lb}{0.0610\ in^3}\\\\=0.49\ lb/in^3

So, the density of liquid mercury is 0.49\ lb/in^3.

3 0
3 years ago
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