Definition Three main phenotypes describe HF according to the measurement of the left ventricle ejection fraction (EF), and the differentiation between these types is important due to different demographics, comorbidities, and responses to therapies: Heart failure with reduced ejection fraction (HFrEF): EF less than or equal to 40%

Left ventricular ejection fraction (LVEF) is a surrogate for left ventricular global systolic function, defined as the left ventricular stroke volume divided by the end-diastolic volume.

Calculate the mole fraction of benzene in solution containing `30%` by mass in carbon tetrachloride. asked May 29, 2019 in Chemistry by AtulRastogi ( 91.4k points) 0 votes

Learning Objectives To describe the relationship between solute concentration and the physical properties of a solution. To understand that the total number of nonvolatile solute particles determines the decrease in vapor pressure, increase in boiling point, and decrease in freezing point of a solution versus the pure solvent.

Let the total mass of the solution be 100 g and the mass of benzene be 30 g. ∴Mass of carbon tetrachloride = (100 − 30)g. = 70 g. Molar mass of benzene (C 6 H 6) = (6 × 12 + 6 × 1) g mol −1. = 78 g mol −1. ∴Number of moles of C 6 H 6 = 30 78 m o l. = 0.3846 mol.

NCERT Intext Question Page No. 39 SOLUTIONS Problem 2.2:- Calculate the mole fraction of benzene in solution containing 30% by mass in carbon tetrachloride (CCl4).

Calculate the mole fraction of benzene is solution containing `30%` by mass in carbon tetrachloride. Then calculate the mole fraction by using the for asked Jun 29, 2020 in Chemistry by PoojaBhatt ( 99.6k points)

Calculate the molarity of a solution of ethanol in water, in which the mole fraction of ethanol is \( 0.040 \) (assume the density of water to be one).\( S \.

.875 as a fraction equals 875/1000 or 7/8 Steps to convert .875 into a fraction. Write .875 as .875 1 Multiply both the numerator and denominator by 10 for each digit after the decimal point. .875 1 = .875 x 1000 1 x 1000 = 875 1000 As a side note the whole number-integral part is: empty The decimal part is: .875 = 875/1000

The factors of 625 are: 1 5 25 125 625. The factors of 1000 are: 1 2 4 5 8 10 20 25 40 50 100 125 200 250 500 1000. The Greatest Common Factor (GCF) for both 625 and 1000 is: 125. Now to reduce the fraction we divide both the numerator and denominator by the GCF value. 625 1000.

The Sine function ( sin (x) ) The sine is a trigonometric function of an angle, usually defined for acute angles within a right-angled triangle as the ratio of the length of the opposite side to the longest side of the triangle. In the illustration below, sin (α) = a/c and sin (β) = b/c. From cos (α) = a/c follows that the sine of any angle.

The number π (/paɪ/; spelled out as "pi") is a mathematical constant that is the ratio of a circle's circumference to its diameter, approximately equal to 3.14159. The number π appears in many formulas across mathematics and physics.