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vovangra [49]
3 years ago
11

How many neutrons does element X have if its atomic number is 25 and its mass number is 92?

Biology
2 answers:
inna [77]3 years ago
8 0
Atomic mass is the sum of neutrons and protons, and atomic number is the number of protons.
Therefore, 92-25 = 67.

67 neutrons.

Sidenote:
Electrons are not considered in atomic mass since they weigh way too little
Deffense [45]3 years ago
3 0
Atomic mass is the sum of neutrons and protons, and atomic number is the number of protons.
Therefore, 92-25 = 67.

67 neutrons.

Sidenote:
Electrons are not considered in atomic mass since they weigh way too little
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insens350 [35]

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4 0
3 years ago
Can impermeable rock become permeable rock? Explain why it why not.
zepelin [54]
Porous and Impermeable Rock These pores, or tiny holes, result in the rock's porosity. If water can move through a rock, the rock is permeable. Eventually, the water reaches a layer of rock that is not porous. This rock is impermeable.
8 0
3 years ago
The United States uses about _____ of the oil produced in the world.
Tresset [83]
Well the U.S. consumes about 7.19 Billion barrels of petroleum related products in 2016.

The U.S. currently uses roughly 25% of all of the world's global reserves.
Hey, America likes oil, leave them alone


7 0
3 years ago
In which statements regarding medications taken by a client diagnosed with copd do the the drug name and the drug category corre
emmainna [20.7K]
There are choices for this question namely:

a) Ciprofloxacin is an antibiotic.
b) Decadron is an antibiotic.
c) Bactrim is a bronchodilator.
d) Albuterol is a bronchodilator.
<span>e) Prednisone is a corticosteroid.
</span>
The correct answers are "ciprofloxacin is an antibiotic", "albuterol is a bronchodilator", and "prednisone is a corticosteroid". Ciprofloxacin is an antibiotic in the class of fluoroquinolones, effective against respiratory infections since patients with COPD has mucus hypersecretion which predisposes the patient to respiratory infections. Other antibiotics include respiratory fluoroquinolones such as levofloxacin and moxifloxacin, cephalosporins such as cefuroxime and ceftriaxone, and beta-lactams such as co-amoxiclav. Albuterol is a short acting beta-agonist (SABA) which actions as a bronchodilator by relaxing bronchial smooth muscles. Other popular SABA is salbutamol. Prednisone is a corticosteroid which actions to prevent inflammation by blocking the arachidonic acid pathway and therefore block the formation of inflammatory mediators. 

Decadron is dexamethasone which is a steroid. Bactrim is TMP/SMX which is an antibiotic.
3 0
3 years ago
Certain cells have protein channels on them to transport substances across the cell membrane This kind of transport is referred
Dimas [21]

This is called active transport. The proteins use ATP to transport stuff in and out of the cell.

4 0
3 years ago
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