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gizmo_the_mogwai [7]
4 years ago
9

Please help will reward brainliest

Chemistry
2 answers:
Solnce55 [7]4 years ago
8 0
Your endocrine system consists your all the glands in your body that creates hormones. This plays a role in making sure your body in working the way it should be. The hypothalamus, pituitary, and pineal glands are your brain. Thyroid and Parathyroid glands are in your neck. Thymus are in between your lungs and Adrenals are on top of your kidneys. The Pancreas is behind the stomach. For females, their ovaries, and for males, their testes are in the pelvic region.
Tanzania [10]4 years ago
7 0
The endocrine system<span> is the collection of </span>glands<span> of an organism that </span>secrete hormones<span>directly into the </span>circulatory system<span>to be carried towards distant target organs. In </span>humans<span>, the major </span>endocrine glands<span> include the </span>pineal gland<span>, </span>pituitary gland<span>, </span>pancreas<span>, </span>ovaries<span>, </span>testes<span>, </span>thyroid gland<span>, </span>parathyroid gland<span>, and </span>adrenal glands<span>. In </span>vertebrates<span>, the </span>hypothalamus<span> is the neural control center for all endocrine systems. The field of study dealing with the endocrine system and its disorders is </span>endocrinology<span>, a branch of </span>internal medicine.<span>

</span>
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A student estimated a mass to be 275 g but upon carefully measuring it found the actual mass to be 260 g. what is the percent er
olga2289 [7]

Answer:

5.77% Error.

Explanation:

Given an experimental value of 275 g , and a theoretical value of 260 g, the percent error can be found using the equation:

\% \: error \:  =  \frac{ |theoretical \: value \:  - \: experimental \: value | }{theoretical \: value}  \times 100

% Error = ( | 260 - 275 | / 260 ) × 100 = ( | - 15 | / 260 ) × 100 = ( 15 / 260 ) × 100 = 1500/260 = 300 / 52 = 5.769230769230.. ≈ 5.77%

7 0
4 years ago
Balancing chemistry equations
kaheart [24]
<span>Because you've added coefficients to the molecules on the right side of the equation, the number of oxygen atoms has changed. ...Add a coefficient of 5 to the oxygen molecule on the left side of the equation. ...<span>C3H8 + 5O2 --> 4H2O + 3CO2.</span><span>The carbon, hydrogen, and oxygen atoms are balanced</span></span>
7 0
3 years ago
What is the ph of a 7.5×10-3m oh- solution? <br><br> ph=?
BlackZzzverrR [31]
We will assume complete dissociation.
Since we have the molarity of OH solution, we can calculate the p(OH) as follows:
p(OH) = -log(molarity of OH) = -log(<span>7.5×10-3) = 2.1249

It is known that: p(H) + p(OH) = 14
Therefore, p(H) can be calculated as follows:
p(H) = 14 - p(OH) = 14 - 2.1249 = 11.875</span>
7 0
4 years ago
in the combustion of hydrogen gas, hydrogen reacts with oxygen from the air to form water vapor, if you burn 50.0g of hydrogen a
Citrus2011 [14]
2H₂ ₍g₎  +  O₂ ₍g₎  -------->  2H₂O ₍l₎

If mass of water =  447 g 
And mol =  \frac{MASS}{MOLAR  MASS}

then mol of H₂O  =  \frac{447 g}{((16)+(1 * 2) g / mol} 
                           =  24.83 mol

Mole ratio of  H₂O : O₂    ≡    2  :  1

Since mole of H₂O =  24.83 mol
then mole of O₂  =  24.83 mol  ÷  2
                           =  12.42 mol

Thus Mass of O₂  = 12.42 mol  *  (16 * 2) g / mol
                             = 397.28 g
6 0
3 years ago
What is the volume of solution if 2.0 moles of 0.4 M HF are present in the solution?
Tamiku [17]

Answer:

5 L

Explanation:

Molarity = mol/L   ---->    L = mol/molarity

2.0 moles / 0.4 M HF = 5 L

8 0
3 years ago
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