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4 years ago

Which factor plays the biggest role in delaying the detection of childhood diseases?

Chemistry

1 answer:

Maru [420]4 years ago

4 0

Answer:

poor access to health care providers

Explanation:

without health care providers you cant get tested.

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A mouse is placed in a sealed chamber with air at 769.0 torr. This chamber is equipped with enough solid KOH to absorb any CO2 a

svlad2 [7]

Answer: The amount of oxygen gas consumed by mouse is 0.202 grams.

Explanation:

We are given:

Initial pressure of air = 769.0 torr

Final pressure of air = 717.1 torr

Pressure of oxygen = Pressure decreased = Initial pressure - Final pressure = (769.0 - 717.1) torr = 51.9 torr

To calculate the amount of oxygen gas consumed, we use the equation given by ideal gas which follows:

$PV=nRT$

where,

P = pressure of the gas = 51.9 torr

V = Volume of the gas = 2.20 L

T = Temperature of the gas = 292 K

R = Gas constant = $62.364\text{ L. Torr }mol^{-1}K^{-1}$

n = number of moles of oxygen gas = ?

Putting values in above equation, we get:

$51.9torr\times 2.20L=n\times 62.364\text{ L. Torr }mol^{-1}K^{-1}\times 292K\\\\n=\frac{51.9\times 2.20}{62.364\times 292}=0.0063mol$

To calculate the mass from given number of moles, we use the equation:

$\text{Number of moles}=\frac{\text{Given mass}}{\text{Molar mass}}$

Moles of oxygen gas = 0.0063 moles

Molar mass of oxygen gas = 32 g/mol

Putting values in above equation, we get:

$0.0063mol=\frac{\text{Mass of oxygen gas}}{32g/mol}\\\\\text{Mass of oxygen gas}=(0.0063mol\times 32g/mol)=0.202g$

Hence, the amount of oxygen gas consumed by mouse is 0.202 grams.

5 0

3 years ago

Do the tests performed to identify DNA exclude the presence of RNA?

Ratling [72]

DNA and RNA can also be ISOLATED from the same biological sample.

So the answer is no, both DNA and RNA are together.

5 0

3 years ago

Read 2 more answers

Please help asap!!!!!

lozanna [386]

Reactant + reactant = product

C + O2 = CO2

carbon dioxide is what's being made is product

8 0

3 years ago

How many Hydrogen atoms are there in 5 g of NH3? (molar mass of NH3 = 17 g/mol)

goldfiish [28.3K]

Answer:5.309 × 10²⁴ atoms.

Explanation:

Given that

molar mass of NH3 = 17 g/mol

Mass of NH3 = 5g

Therefore, No of moles of NH3 = Mass/ molar mass

= 5g/ 17g/mol

= 0.294 moles.

I mole = 6.02 × 10²³ atoms

Therefore the number of hydrogen atoms in a 0.294 moles of ammonia gives us

0.294× 6.02 × 10²³ × 3 ( since there are 3 hydrogens in Ammonia )

= 5.309 × 10²⁴ atoms.

5 0

3 years ago

A substance has a atomic number of 80.How many protons and electrons do atoms of the substance have ?what is the substance

Anarel [89]

Answer: Substance is Mercury (Hg)

number of protons = 80

number of electrons = 80

Explanation:

Atomic number which is symbolized by "Z" is the number of protons in nucleus of an atom.

Hence,

number of protons = atomic number = 80

By knowing atomic number, we can find the element by using periodic table. Since the atomic number 80, the element is Mercury (Hg).

If the substance is in its neutral state, which means there is no charge on it, then the number of protons equals to the number of electrons of that element.

Hence,

number of electrons = number of protons = 80

4 0

4 years ago

Read 2 more answers