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katovenus [111]
3 years ago
7

Help ASAP I will mark brainliest to he correct answer

Chemistry
1 answer:
irga5000 [103]3 years ago
8 0

Answer:

513.3 km/h

Explanation:

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Well red blood cells carry oxygen to muscles
Circulatory system is probably the answer you are looking for. 
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What is the concentration of hydrogen ions in a solution with a pH of 2.36?
Viefleur [7K]

Answer:

b)

Explanation:

pH =  -  log[H {}^{ + } ] \\ 2.36 =  -  log[H {}^{ + } ] \\ [H {}^{ + } ] =  {10}^{ - 2.36}  \\ [H {}^{ + } ] = 4.37 \times  {10}^{ - 3}  \: M

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3 years ago
The pressure in a car tire is 178 kPa at 37°C. After a long drive, the pressure is 275 kPa. What is
dimaraw [331]

Answer:

T₂ = 478.93 K

Explanation:

Given that,

Initial pressure, P₁ = 178 kPa

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We need to find the new temp of the air in the tire, assuming the volume is constant. We know that,

\dfrac{P_1}{T_1}=\dfrac{P_2}{T_2}\\\\T_2=\dfrac{P_2T_1}{P_1}\\\\T_2=\dfrac{275\times 310}{178}\\\\T_2=478.93 K

So, the new temperature is equal to 478.93 K.

3 0
3 years ago
How many atoms are present in 48.60 g of Mg
Ganezh [65]
1.204 x 10 ( 24 ) atoms of magnesium are present.
In order to go from mass of magnesium there have to do 2 things 

1. convert mass of Mg to moles of Mg using the molar mass of Mg as converted to a factor 

2. convert moles of Mg to atoms of Mg using the Avogadro's number ( 6.02 x 10  (23) as a conversion factor 
 
Hope my it helped a little :)  <span />
3 0
4 years ago
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