All categories

3 years ago

Select the three hypotheses that explain why being born in the United States leads to a higher chance of developing allergies

Chemistry

1 answer:

ra1l [238]3 years ago

7 0

The three hypotheses that explain why being born in the United States

leads to a higher chance of developing allergies include the following:

The weather patterns in the United States bring more allergens compared to other countries.

Other factors which might influence why there are more children with allergies in the United States include climate, obesity, and the typical western diet with high amounts of processed foods.

The hygiene hypothesis claims that children in the United States are not exposed to enough germs in their infancy and childhood to develop their immune system‘s properly.

Allergies are caused by a host of factors such as :

Climate

Diet

Immune system

These factors is the reason why the chosen hypotheses are the most

appropriate.

Read more about Hypotheses here brainly.com/question/10854125

You might be interested in

The following chemical equation is not balanced: C3H8 + O2 CO2 + H2O When this chemical equation is correctly balanced, what is

Vesnalui [34]

Answer:

Explanation:

C3H8 + 502 ----> 3CO2 + 4H20.

7 0

3 years ago

Use the bond energy to calculate an approximate value of ΔH for the following reaction. Which is the more stable form of FNO2?

Phoenix [80]

The Lewis structures in which there are no formal charges is the most stable. Hence, structure (b) is the more stable form of FNO2.

<h3>Lewis structure</h3>

The question is incomplete but I will try to answer you as much as I can. Now the equation is missing hence we can't numerically caculate the enthalpy chnage of the reaction from bond energies. However, we can do this using the formula; Σbond energy of reactants - bond energy of products.

Concerning the Lewis structures of FNO2, the most stable structure is structure (b) as shown in the image attached where the atoms have no formal charges.

Learn more about Lewis structure:brainly.com/question/4144781

8 0

3 years ago

When an atom of oxygen, atomic number 8, forms an ion what is the overall charge of that

lesya [120]

A. 1-

Explanation:

When an atom of oxygen with an atomic number of 8 forms an ion, the overall charge on it will be -1

When atoms from ions, they either lose or gain electrons in the process.

If an atom loses electrons, they become positively charged.

When they gain electrons, they become negatively charged.

An atom is made up of three fundamental particles;

Protons the positively charged particles

Electrons are negatively charged

Neutrons do not carry any charges.

In a neutral atom, the number of protons and electrons are the same

When an atom gains electrons, the number of electrons in it increases and it becomes negatively charged.

When they lose electrons, the number of protons is more and they become positively charged.

Oxygen atoms prefers to gain electrons in order to have a complete octet. When they gain an electron;

With the atomic number of 8:

Number of proton = 8

Number of electrons = 9

Charge = 8-9 = -1

We can represent this as O¹⁻

Ideally, oxygen prefers to gain two electrons to mimic the structure of the noble gas Neon.

Learn more:

Anions in binary compounds brainly.com/question/11041787

Anions brainly.com/question/4670413

#learnwithBrainly

4 0

4 years ago

6.<br> What is the acceleration of a 24 kg mass pushed by a 6 N force?<br> I jus need number 6

Setler79 [48]

The acceleration : 0.25 m/s²

<h3>Further explanation</h3>

Given

mass = m = 24 kg

Force = F = 6 N

Required

The acceleration

Solution

Newtons' second law :

Newton's 2nd law explains that the acceleration produced by the resultant force on an object is proportional and in line with the resultant force and inversely proportional to the mass of the object

ΣF = m x a

$\large {\boxed {\bold {a = \frac {\sum F} {m}}}$