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Oksana_A [137]
4 years ago
14

The recommended dose of aminophylline for children is 1.0 mg/kg/hr. 15 mL of a 30 mg/mL sltn is added to a 150 mL bottle of D5W.

At what rate mL/hr should the injection be delivered to 35 lb child
Chemistry
1 answer:
natima [27]4 years ago
3 0

Answer:

The answer is "6.68 \frac{ml} {hr}".

Explanation:

It's going to be 18.18 kg to turn body mass to kg.  

Size 1mg / kg / hr, therefore = 1 x 18.18

                                               = 18.18 kg / hr  

now we adding 30 mg / ml of dextrose = 30 x 15

                                                                 =\frac{450mg}{15 ml +150 ml}

of dextrose, from 15 ml to 150 ml;  

Therefore, now 450 mg in 165m:    

= \frac{ 450}{165}\\ \\=2.72 \frac{mg} {ml}  

now divide the   18.18 by 2.72:

=\frac{18.18}{2.72}

= 6.68 \frac{ml} {hr}

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Which of the following elements is used to make metal products?
valina [46]

Its Iron and Potassium because if you look at the periodic table,and you go down the list of metals, you can see what metals are there.

8 0
3 years ago
6. What is the pressure of 0.60 moles of a gas if its volume is 10.0 liters at 35.0°C?
denis-greek [22]

Answer: The pressure inside the cylinder will be 1.5 atm. The pressure can be calculated using the Ideal Gas Equation which relates the pressure, volume, temperature, and amount of gas to each other.  

Further Explanation

The Ideal Gas Equation is:  

PV = nRT

where:

P - pressure (in atm)

V - volume (in L)

n - amount of gas (in moles)

R - universal gas constant 0.08206 \frac{L-atm}{mol-K}

T - temperature (in K)

In the problem, we are given the values:

P = ?

V = 10.0 L (3 significant figures)

n = 0.60  moles  ( 2 significant figures)

T = 35.0 degrees Celsius (3 significant figures)

We need to convert the temperature to Kelvin before we can use the Ideal Gas Equation. The formula to convert from degree Celsius to Kelvin is:

Temperature \ in \ Kelvin = Temperature\ in \ Celsius \ + \ 273.15

Therefore, for this problem,

Temperature\ in \ K = 35.0 +273.15\\Temperature\ in \ K = 308.15

Solving for P using the Ideal Gas Equation:

P = \frac{nRT}{V} \\P = \frac{(0.60\ mol) \ (0.08206 \ \frac{L-atm}{mol - K}) \ (308.15\ K) \ }{10.0 \ L} \\P = 1.51\ atm

The least number of significant figures is 2,  therefore, the final answer must have only 2 significant figures.

Learn More

1. Learn more about Boyle's Law brainly.com/question/1437490  

2. Learn more about Charles' Law brainly.com/question/1421697

3. Learn more about Avogadro's Law brainly.com/question/1964205

Keywords: Ideal Gas Law, Gas Pressure

7 0
4 years ago
A certain substance X has a normal boiling point of 134.5°C and a molal boiling point elevation constant =Kb1.36·°C·kgmol−1 . Ca
erastova [34]

Answer:

136.5°C

Explanation:

Given data

  • Boiling point of X: 134.5°C
  • Molal boiling point elevation constant (Kb): 1.36·°C·kg.mol⁻¹

We can calculate the elevation in the boiling point (ΔT) using the following expression.

ΔT = Kb × m

where,

m is the molality

The molar mass of urea is 60.06 g/mol. The moles of urea corresponding to 76 g is:

76 g × (1 mol/60.06g) = 1.3 mol

The mass of the solvent (X) is 850 g = 0.850 kg.

The molality is:

m = 1.3 mol / 0.850 kg = 1.5 mol/kg

Then,

ΔT = Kb × m

ΔT = 1.36·°C·kg.mol⁻¹ × 1.5 mol/kg

ΔT = 2.0 °C

The boiling point of the solution is

134.5°C + 2.0°C = 136.5°C

3 0
4 years ago
Sterling silver is:
dexar [7]

Answer:

It’s D

Explanation:

It’s an alloy so it is not pure. If you take a small sample and analyze it, the mixture will be similar throughout. Think of Gatorade as a homogeneous mixture because it is the same concentration of all ingredients throughout. Think of pizza for heterogeneous mixtures. There isn’t the pepperoni (or whatever you prefer) throughout.

4 0
3 years ago
What causes the greenhouse effect?
wel

Answer:

hope it helps...

Explanation:

The greenhouse effect is caused by the atmospheric accumulation of gases such as carbon dioxide and methane, which contain some of the heat emitted from Earth's surface. The atmosphere allows most of the visible light from the Sun to pass through and reach Earth's surface.

8 0
3 years ago
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