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2 years ago

A. Which blood type is universal donor? A,B,AB or O pick

Chemistry

1 answer:

Romashka-Z-Leto [24]2 years ago

3 0

Answer:

Blood type O is the universal donor.

The Universal donor is the only blood type that can donate blood to any other blood group. The universal recipient is the only blood group that can receive blood from any other blood group.

-TheUnknownScientist 72

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What type of rock is chromium

pantera1 [17]

an oxide of iron, magnesium, aluminum, and chromium

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2 years ago

Read 2 more answers

When magnesium reacts with hydrochloric acid, hydrogen gas is formed: 2HCl + Mg → H2 + MgCl2. What is the volume of hydrogen pro

Maksim231197 [3]

Answer:- C. 16.4 L

Solution:- The given balanced equation is:

$2HCl+Mg\rightarrow H_2+MgCl_2$

From this equation, there is 2:1 mol ratio between HCl and hydrogen gas. First of all we calculate the moles of hydrogen gas from given grams of HCl using stoichiometry and then the volume of hydrogen gas could be calculated using ideal gas law equation, PV = nRT.

Molar mass of HCl = 1.008 + 35.45 = 36.458 gram per mol

The calculations are shown below:

$49.0gHCl(\frac{1molHCl}{36.458gHCl})(\frac{1molH_2}{2molHCl})$

= $0.672molH_2$

Now we will use ideal gas equation to calculate the volume.

n = 0.672 mol

T = 25 + 273 = 298 K

P = 101.3 kPa = 1 atm

R = $0.0821\frac{atm.L}{mol.K}$

PV = nRT

1(V) = (0.672)(0.0821)(298)

V = 16.4 L

From calculations, 16.4 L of hydrogen gas are formed and so the correct choice is C.

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2 years ago

Is the following statement about our solar system true or false?

Archy [21]

Answer:

true

Explanation:

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2 years ago

A container is filled with Neon gas. It has a volume of 1.5L and a pressure of 101.3 kPa. If the volume of the container is incr

Marta_Voda [28]

Answer:

37.98 kPa.

Explanation:

We can use the general law of ideal gas: PV = nRT.

where, P is the pressure of the gas in atm.

V is the volume of the gas in L.

n is the no. of moles of the gas in mol.

R is the general gas constant,

T is the temperature of the gas in K.

If n and T are constant, and have different values of P and V:

(P₁V₁) = (P₂V₂)

Knowing that:

P₁ = 101.3 kPa, V₁ = 1.5 L,

P₂ = ??? kPa, V₂ = 4.0 L.

Applying in the above equation

(P₁V₁) = (P₂V₂)

∴ P₂ = (P₁V₁)/V₂ = (101.3 kPa)(1.5 L)/(4.0 L) = 37.98 kPa.

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2 years ago

What general principle determines the molecular structure of a molecule?

Ugo [173]

I think the answer would be the number of electron in pairs that is around the central atom. This is the most general principle in determining structure of a molecule. Electrons are the ones responsible in bonding with other atoms. Hope this helped.

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3 years ago